1 | /* Declaration statement matcher |
2 | Copyright (C) 2002-2023 Free Software Foundation, Inc. |
3 | Contributed by Andy Vaught |
4 | |
5 | This file is part of GCC. |
6 | |
7 | GCC is free software; you can redistribute it and/or modify it under |
8 | the terms of the GNU General Public License as published by the Free |
9 | Software Foundation; either version 3, or (at your option) any later |
10 | version. |
11 | |
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
15 | for more details. |
16 | |
17 | You should have received a copy of the GNU General Public License |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ |
20 | |
21 | #include "config.h" |
22 | #include "system.h" |
23 | #include "coretypes.h" |
24 | #include "options.h" |
25 | #include "tree.h" |
26 | #include "gfortran.h" |
27 | #include "stringpool.h" |
28 | #include "match.h" |
29 | #include "parse.h" |
30 | #include "constructor.h" |
31 | #include "target.h" |
32 | |
33 | /* Macros to access allocate memory for gfc_data_variable, |
34 | gfc_data_value and gfc_data. */ |
35 | #define gfc_get_data_variable() XCNEW (gfc_data_variable) |
36 | #define gfc_get_data_value() XCNEW (gfc_data_value) |
37 | #define gfc_get_data() XCNEW (gfc_data) |
38 | |
39 | |
40 | static bool set_binding_label (const char **, const char *, int); |
41 | |
42 | |
43 | /* This flag is set if an old-style length selector is matched |
44 | during a type-declaration statement. */ |
45 | |
46 | static int old_char_selector; |
47 | |
48 | /* When variables acquire types and attributes from a declaration |
49 | statement, they get them from the following static variables. The |
50 | first part of a declaration sets these variables and the second |
51 | part copies these into symbol structures. */ |
52 | |
53 | static gfc_typespec current_ts; |
54 | |
55 | static symbol_attribute current_attr; |
56 | static gfc_array_spec *current_as; |
57 | static int colon_seen; |
58 | static int attr_seen; |
59 | |
60 | /* The current binding label (if any). */ |
61 | static const char* curr_binding_label; |
62 | /* Need to know how many identifiers are on the current data declaration |
63 | line in case we're given the BIND(C) attribute with a NAME= specifier. */ |
64 | static int num_idents_on_line; |
65 | /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we |
66 | can supply a name if the curr_binding_label is nil and NAME= was not. */ |
67 | static int has_name_equals = 0; |
68 | |
69 | /* Initializer of the previous enumerator. */ |
70 | |
71 | static gfc_expr *last_initializer; |
72 | |
73 | /* History of all the enumerators is maintained, so that |
74 | kind values of all the enumerators could be updated depending |
75 | upon the maximum initialized value. */ |
76 | |
77 | typedef struct enumerator_history |
78 | { |
79 | gfc_symbol *sym; |
80 | gfc_expr *initializer; |
81 | struct enumerator_history *next; |
82 | } |
83 | enumerator_history; |
84 | |
85 | /* Header of enum history chain. */ |
86 | |
87 | static enumerator_history *enum_history = NULL; |
88 | |
89 | /* Pointer of enum history node containing largest initializer. */ |
90 | |
91 | static enumerator_history *max_enum = NULL; |
92 | |
93 | /* gfc_new_block points to the symbol of a newly matched block. */ |
94 | |
95 | gfc_symbol *gfc_new_block; |
96 | |
97 | bool gfc_matching_function; |
98 | |
99 | /* Set upon parsing a !GCC$ unroll n directive for use in the next loop. */ |
100 | int directive_unroll = -1; |
101 | |
102 | /* Set upon parsing supported !GCC$ pragmas for use in the next loop. */ |
103 | bool directive_ivdep = false; |
104 | bool directive_vector = false; |
105 | bool directive_novector = false; |
106 | |
107 | /* Map of middle-end built-ins that should be vectorized. */ |
108 | hash_map<nofree_string_hash, int> *gfc_vectorized_builtins; |
109 | |
110 | /* If a kind expression of a component of a parameterized derived type is |
111 | parameterized, temporarily store the expression here. */ |
112 | static gfc_expr *saved_kind_expr = NULL; |
113 | |
114 | /* Used to store the parameter list arising in a PDT declaration and |
115 | in the typespec of a PDT variable or component. */ |
116 | static gfc_actual_arglist *decl_type_param_list; |
117 | static gfc_actual_arglist *type_param_spec_list; |
118 | |
119 | /********************* DATA statement subroutines *********************/ |
120 | |
121 | static bool in_match_data = false; |
122 | |
123 | bool |
124 | gfc_in_match_data (void) |
125 | { |
126 | return in_match_data; |
127 | } |
128 | |
129 | static void |
130 | set_in_match_data (bool set_value) |
131 | { |
132 | in_match_data = set_value; |
133 | } |
134 | |
135 | /* Free a gfc_data_variable structure and everything beneath it. */ |
136 | |
137 | static void |
138 | free_variable (gfc_data_variable *p) |
139 | { |
140 | gfc_data_variable *q; |
141 | |
142 | for (; p; p = q) |
143 | { |
144 | q = p->next; |
145 | gfc_free_expr (p->expr); |
146 | gfc_free_iterator (&p->iter, 0); |
147 | free_variable (p: p->list); |
148 | free (ptr: p); |
149 | } |
150 | } |
151 | |
152 | |
153 | /* Free a gfc_data_value structure and everything beneath it. */ |
154 | |
155 | static void |
156 | free_value (gfc_data_value *p) |
157 | { |
158 | gfc_data_value *q; |
159 | |
160 | for (; p; p = q) |
161 | { |
162 | q = p->next; |
163 | mpz_clear (p->repeat); |
164 | gfc_free_expr (p->expr); |
165 | free (ptr: p); |
166 | } |
167 | } |
168 | |
169 | |
170 | /* Free a list of gfc_data structures. */ |
171 | |
172 | void |
173 | gfc_free_data (gfc_data *p) |
174 | { |
175 | gfc_data *q; |
176 | |
177 | for (; p; p = q) |
178 | { |
179 | q = p->next; |
180 | free_variable (p: p->var); |
181 | free_value (p: p->value); |
182 | free (ptr: p); |
183 | } |
184 | } |
185 | |
186 | |
187 | /* Free all data in a namespace. */ |
188 | |
189 | static void |
190 | gfc_free_data_all (gfc_namespace *ns) |
191 | { |
192 | gfc_data *d; |
193 | |
194 | for (;ns->data;) |
195 | { |
196 | d = ns->data->next; |
197 | free (ptr: ns->data); |
198 | ns->data = d; |
199 | } |
200 | } |
201 | |
202 | /* Reject data parsed since the last restore point was marked. */ |
203 | |
204 | void |
205 | gfc_reject_data (gfc_namespace *ns) |
206 | { |
207 | gfc_data *d; |
208 | |
209 | while (ns->data && ns->data != ns->old_data) |
210 | { |
211 | d = ns->data->next; |
212 | free (ptr: ns->data); |
213 | ns->data = d; |
214 | } |
215 | } |
216 | |
217 | static match var_element (gfc_data_variable *); |
218 | |
219 | /* Match a list of variables terminated by an iterator and a right |
220 | parenthesis. */ |
221 | |
222 | static match |
223 | var_list (gfc_data_variable *parent) |
224 | { |
225 | gfc_data_variable *tail, var; |
226 | match m; |
227 | |
228 | m = var_element (&var); |
229 | if (m == MATCH_ERROR) |
230 | return MATCH_ERROR; |
231 | if (m == MATCH_NO) |
232 | goto syntax; |
233 | |
234 | tail = gfc_get_data_variable (); |
235 | *tail = var; |
236 | |
237 | parent->list = tail; |
238 | |
239 | for (;;) |
240 | { |
241 | if (gfc_match_char (',') != MATCH_YES) |
242 | goto syntax; |
243 | |
244 | m = gfc_match_iterator (&parent->iter, 1); |
245 | if (m == MATCH_YES) |
246 | break; |
247 | if (m == MATCH_ERROR) |
248 | return MATCH_ERROR; |
249 | |
250 | m = var_element (&var); |
251 | if (m == MATCH_ERROR) |
252 | return MATCH_ERROR; |
253 | if (m == MATCH_NO) |
254 | goto syntax; |
255 | |
256 | tail->next = gfc_get_data_variable (); |
257 | tail = tail->next; |
258 | |
259 | *tail = var; |
260 | } |
261 | |
262 | if (gfc_match_char (')') != MATCH_YES) |
263 | goto syntax; |
264 | return MATCH_YES; |
265 | |
266 | syntax: |
267 | gfc_syntax_error (ST_DATA); |
268 | return MATCH_ERROR; |
269 | } |
270 | |
271 | |
272 | /* Match a single element in a data variable list, which can be a |
273 | variable-iterator list. */ |
274 | |
275 | static match |
276 | var_element (gfc_data_variable *new_var) |
277 | { |
278 | match m; |
279 | gfc_symbol *sym; |
280 | |
281 | memset (s: new_var, c: 0, n: sizeof (gfc_data_variable)); |
282 | |
283 | if (gfc_match_char ('(') == MATCH_YES) |
284 | return var_list (parent: new_var); |
285 | |
286 | m = gfc_match_variable (&new_var->expr, 0); |
287 | if (m != MATCH_YES) |
288 | return m; |
289 | |
290 | if (new_var->expr->expr_type == EXPR_CONSTANT |
291 | && new_var->expr->symtree == NULL) |
292 | { |
293 | gfc_error ("Inquiry parameter cannot appear in a " |
294 | "data-stmt-object-list at %C" ); |
295 | return MATCH_ERROR; |
296 | } |
297 | |
298 | sym = new_var->expr->symtree->n.sym; |
299 | |
300 | /* Symbol should already have an associated type. */ |
301 | if (!gfc_check_symbol_typed (sym, gfc_current_ns, false, gfc_current_locus)) |
302 | return MATCH_ERROR; |
303 | |
304 | if (!sym->attr.function && gfc_current_ns->parent |
305 | && gfc_current_ns->parent == sym->ns) |
306 | { |
307 | gfc_error ("Host associated variable %qs may not be in the DATA " |
308 | "statement at %C" , sym->name); |
309 | return MATCH_ERROR; |
310 | } |
311 | |
312 | if (gfc_current_state () != COMP_BLOCK_DATA |
313 | && sym->attr.in_common |
314 | && !gfc_notify_std (GFC_STD_GNU, "initialization of " |
315 | "common block variable %qs in DATA statement at %C" , |
316 | sym->name)) |
317 | return MATCH_ERROR; |
318 | |
319 | if (!gfc_add_data (&sym->attr, sym->name, &new_var->expr->where)) |
320 | return MATCH_ERROR; |
321 | |
322 | return MATCH_YES; |
323 | } |
324 | |
325 | |
326 | /* Match the top-level list of data variables. */ |
327 | |
328 | static match |
329 | top_var_list (gfc_data *d) |
330 | { |
331 | gfc_data_variable var, *tail, *new_var; |
332 | match m; |
333 | |
334 | tail = NULL; |
335 | |
336 | for (;;) |
337 | { |
338 | m = var_element (new_var: &var); |
339 | if (m == MATCH_NO) |
340 | goto syntax; |
341 | if (m == MATCH_ERROR) |
342 | return MATCH_ERROR; |
343 | |
344 | new_var = gfc_get_data_variable (); |
345 | *new_var = var; |
346 | if (new_var->expr) |
347 | new_var->expr->where = gfc_current_locus; |
348 | |
349 | if (tail == NULL) |
350 | d->var = new_var; |
351 | else |
352 | tail->next = new_var; |
353 | |
354 | tail = new_var; |
355 | |
356 | if (gfc_match_char ('/') == MATCH_YES) |
357 | break; |
358 | if (gfc_match_char (',') != MATCH_YES) |
359 | goto syntax; |
360 | } |
361 | |
362 | return MATCH_YES; |
363 | |
364 | syntax: |
365 | gfc_syntax_error (ST_DATA); |
366 | gfc_free_data_all (ns: gfc_current_ns); |
367 | return MATCH_ERROR; |
368 | } |
369 | |
370 | |
371 | static match |
372 | match_data_constant (gfc_expr **result) |
373 | { |
374 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
375 | gfc_symbol *sym, *dt_sym = NULL; |
376 | gfc_expr *expr; |
377 | match m; |
378 | locus old_loc; |
379 | |
380 | m = gfc_match_literal_constant (&expr, 1); |
381 | if (m == MATCH_YES) |
382 | { |
383 | *result = expr; |
384 | return MATCH_YES; |
385 | } |
386 | |
387 | if (m == MATCH_ERROR) |
388 | return MATCH_ERROR; |
389 | |
390 | m = gfc_match_null (result); |
391 | if (m != MATCH_NO) |
392 | return m; |
393 | |
394 | old_loc = gfc_current_locus; |
395 | |
396 | /* Should this be a structure component, try to match it |
397 | before matching a name. */ |
398 | m = gfc_match_rvalue (result); |
399 | if (m == MATCH_ERROR) |
400 | return m; |
401 | |
402 | if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE) |
403 | { |
404 | if (!gfc_simplify_expr (*result, 0)) |
405 | m = MATCH_ERROR; |
406 | return m; |
407 | } |
408 | else if (m == MATCH_YES) |
409 | { |
410 | /* If a parameter inquiry ends up here, symtree is NULL but **result |
411 | contains the right constant expression. Check here. */ |
412 | if ((*result)->symtree == NULL |
413 | && (*result)->expr_type == EXPR_CONSTANT |
414 | && ((*result)->ts.type == BT_INTEGER |
415 | || (*result)->ts.type == BT_REAL)) |
416 | return m; |
417 | |
418 | /* F2018:R845 data-stmt-constant is initial-data-target. |
419 | A data-stmt-constant shall be ... initial-data-target if and |
420 | only if the corresponding data-stmt-object has the POINTER |
421 | attribute. ... If data-stmt-constant is initial-data-target |
422 | the corresponding data statement object shall be |
423 | data-pointer-initialization compatible (7.5.4.6) with the initial |
424 | data target; the data statement object is initially associated |
425 | with the target. */ |
426 | if ((*result)->symtree |
427 | && (*result)->symtree->n.sym->attr.save |
428 | && (*result)->symtree->n.sym->attr.target) |
429 | return m; |
430 | gfc_free_expr (*result); |
431 | } |
432 | |
433 | gfc_current_locus = old_loc; |
434 | |
435 | m = gfc_match_name (name); |
436 | if (m != MATCH_YES) |
437 | return m; |
438 | |
439 | if (gfc_find_symbol (name, NULL, 1, &sym)) |
440 | return MATCH_ERROR; |
441 | |
442 | if (sym && sym->attr.generic) |
443 | dt_sym = gfc_find_dt_in_generic (sym); |
444 | |
445 | if (sym == NULL |
446 | || (sym->attr.flavor != FL_PARAMETER |
447 | && (!dt_sym || !gfc_fl_struct (dt_sym->attr.flavor)))) |
448 | { |
449 | gfc_error ("Symbol %qs must be a PARAMETER in DATA statement at %C" , |
450 | name); |
451 | *result = NULL; |
452 | return MATCH_ERROR; |
453 | } |
454 | else if (dt_sym && gfc_fl_struct (dt_sym->attr.flavor)) |
455 | return gfc_match_structure_constructor (dt_sym, result); |
456 | |
457 | /* Check to see if the value is an initialization array expression. */ |
458 | if (sym->value->expr_type == EXPR_ARRAY) |
459 | { |
460 | gfc_current_locus = old_loc; |
461 | |
462 | m = gfc_match_init_expr (result); |
463 | if (m == MATCH_ERROR) |
464 | return m; |
465 | |
466 | if (m == MATCH_YES) |
467 | { |
468 | if (!gfc_simplify_expr (*result, 0)) |
469 | m = MATCH_ERROR; |
470 | |
471 | if ((*result)->expr_type == EXPR_CONSTANT) |
472 | return m; |
473 | else |
474 | { |
475 | gfc_error ("Invalid initializer %s in Data statement at %C" , name); |
476 | return MATCH_ERROR; |
477 | } |
478 | } |
479 | } |
480 | |
481 | *result = gfc_copy_expr (sym->value); |
482 | return MATCH_YES; |
483 | } |
484 | |
485 | |
486 | /* Match a list of values in a DATA statement. The leading '/' has |
487 | already been seen at this point. */ |
488 | |
489 | static match |
490 | top_val_list (gfc_data *data) |
491 | { |
492 | gfc_data_value *new_val, *tail; |
493 | gfc_expr *expr; |
494 | match m; |
495 | |
496 | tail = NULL; |
497 | |
498 | for (;;) |
499 | { |
500 | m = match_data_constant (result: &expr); |
501 | if (m == MATCH_NO) |
502 | goto syntax; |
503 | if (m == MATCH_ERROR) |
504 | return MATCH_ERROR; |
505 | |
506 | new_val = gfc_get_data_value (); |
507 | mpz_init (new_val->repeat); |
508 | |
509 | if (tail == NULL) |
510 | data->value = new_val; |
511 | else |
512 | tail->next = new_val; |
513 | |
514 | tail = new_val; |
515 | |
516 | if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) |
517 | { |
518 | tail->expr = expr; |
519 | mpz_set_ui (tail->repeat, 1); |
520 | } |
521 | else |
522 | { |
523 | mpz_set (tail->repeat, expr->value.integer); |
524 | gfc_free_expr (expr); |
525 | |
526 | m = match_data_constant (result: &tail->expr); |
527 | if (m == MATCH_NO) |
528 | goto syntax; |
529 | if (m == MATCH_ERROR) |
530 | return MATCH_ERROR; |
531 | } |
532 | |
533 | if (gfc_match_char ('/') == MATCH_YES) |
534 | break; |
535 | if (gfc_match_char (',') == MATCH_NO) |
536 | goto syntax; |
537 | } |
538 | |
539 | return MATCH_YES; |
540 | |
541 | syntax: |
542 | gfc_syntax_error (ST_DATA); |
543 | gfc_free_data_all (ns: gfc_current_ns); |
544 | return MATCH_ERROR; |
545 | } |
546 | |
547 | |
548 | /* Matches an old style initialization. */ |
549 | |
550 | static match |
551 | match_old_style_init (const char *name) |
552 | { |
553 | match m; |
554 | gfc_symtree *st; |
555 | gfc_symbol *sym; |
556 | gfc_data *newdata, *nd; |
557 | |
558 | /* Set up data structure to hold initializers. */ |
559 | gfc_find_sym_tree (name, NULL, 0, &st); |
560 | sym = st->n.sym; |
561 | |
562 | newdata = gfc_get_data (); |
563 | newdata->var = gfc_get_data_variable (); |
564 | newdata->var->expr = gfc_get_variable_expr (st); |
565 | newdata->var->expr->where = sym->declared_at; |
566 | newdata->where = gfc_current_locus; |
567 | |
568 | /* Match initial value list. This also eats the terminal '/'. */ |
569 | m = top_val_list (data: newdata); |
570 | if (m != MATCH_YES) |
571 | { |
572 | free (ptr: newdata); |
573 | return m; |
574 | } |
575 | |
576 | /* Check that a BOZ did not creep into an old-style initialization. */ |
577 | for (nd = newdata; nd; nd = nd->next) |
578 | { |
579 | if (nd->value->expr->ts.type == BT_BOZ |
580 | && gfc_invalid_boz (G_("BOZ at %L cannot appear in an old-style " |
581 | "initialization" ), &nd->value->expr->where)) |
582 | return MATCH_ERROR; |
583 | |
584 | if (nd->var->expr->ts.type != BT_INTEGER |
585 | && nd->var->expr->ts.type != BT_REAL |
586 | && nd->value->expr->ts.type == BT_BOZ) |
587 | { |
588 | gfc_error (G_("BOZ literal constant near %L cannot be assigned to " |
589 | "a %qs variable in an old-style initialization" ), |
590 | &nd->value->expr->where, |
591 | gfc_typename (&nd->value->expr->ts)); |
592 | return MATCH_ERROR; |
593 | } |
594 | } |
595 | |
596 | if (gfc_pure (NULL)) |
597 | { |
598 | gfc_error ("Initialization at %C is not allowed in a PURE procedure" ); |
599 | free (ptr: newdata); |
600 | return MATCH_ERROR; |
601 | } |
602 | gfc_unset_implicit_pure (gfc_current_ns->proc_name); |
603 | |
604 | /* Mark the variable as having appeared in a data statement. */ |
605 | if (!gfc_add_data (&sym->attr, sym->name, &sym->declared_at)) |
606 | { |
607 | free (ptr: newdata); |
608 | return MATCH_ERROR; |
609 | } |
610 | |
611 | /* Chain in namespace list of DATA initializers. */ |
612 | newdata->next = gfc_current_ns->data; |
613 | gfc_current_ns->data = newdata; |
614 | |
615 | return m; |
616 | } |
617 | |
618 | |
619 | /* Match the stuff following a DATA statement. If ERROR_FLAG is set, |
620 | we are matching a DATA statement and are therefore issuing an error |
621 | if we encounter something unexpected, if not, we're trying to match |
622 | an old-style initialization expression of the form INTEGER I /2/. */ |
623 | |
624 | match |
625 | gfc_match_data (void) |
626 | { |
627 | gfc_data *new_data; |
628 | gfc_expr *e; |
629 | gfc_ref *ref; |
630 | match m; |
631 | char c; |
632 | |
633 | /* DATA has been matched. In free form source code, the next character |
634 | needs to be whitespace or '(' from an implied do-loop. Check that |
635 | here. */ |
636 | c = gfc_peek_ascii_char (); |
637 | if (gfc_current_form == FORM_FREE && !gfc_is_whitespace (c) && c != '(') |
638 | return MATCH_NO; |
639 | |
640 | /* Before parsing the rest of a DATA statement, check F2008:c1206. */ |
641 | if ((gfc_current_state () == COMP_FUNCTION |
642 | || gfc_current_state () == COMP_SUBROUTINE) |
643 | && gfc_state_stack->previous->state == COMP_INTERFACE) |
644 | { |
645 | gfc_error ("DATA statement at %C cannot appear within an INTERFACE" ); |
646 | return MATCH_ERROR; |
647 | } |
648 | |
649 | set_in_match_data (true); |
650 | |
651 | for (;;) |
652 | { |
653 | new_data = gfc_get_data (); |
654 | new_data->where = gfc_current_locus; |
655 | |
656 | m = top_var_list (d: new_data); |
657 | if (m != MATCH_YES) |
658 | goto cleanup; |
659 | |
660 | if (new_data->var->iter.var |
661 | && new_data->var->iter.var->ts.type == BT_INTEGER |
662 | && new_data->var->iter.var->symtree->n.sym->attr.implied_index == 1 |
663 | && new_data->var->list |
664 | && new_data->var->list->expr |
665 | && new_data->var->list->expr->ts.type == BT_CHARACTER |
666 | && new_data->var->list->expr->ref |
667 | && new_data->var->list->expr->ref->type == REF_SUBSTRING) |
668 | { |
669 | gfc_error ("Invalid substring in data-implied-do at %L in DATA " |
670 | "statement" , &new_data->var->list->expr->where); |
671 | goto cleanup; |
672 | } |
673 | |
674 | /* Check for an entity with an allocatable component, which is not |
675 | allowed. */ |
676 | e = new_data->var->expr; |
677 | if (e) |
678 | { |
679 | bool invalid; |
680 | |
681 | invalid = false; |
682 | for (ref = e->ref; ref; ref = ref->next) |
683 | if ((ref->type == REF_COMPONENT |
684 | && ref->u.c.component->attr.allocatable) |
685 | || (ref->type == REF_ARRAY |
686 | && e->symtree->n.sym->attr.pointer != 1 |
687 | && ref->u.ar.as && ref->u.ar.as->type == AS_DEFERRED)) |
688 | invalid = true; |
689 | |
690 | if (invalid) |
691 | { |
692 | gfc_error ("Allocatable component or deferred-shaped array " |
693 | "near %C in DATA statement" ); |
694 | goto cleanup; |
695 | } |
696 | |
697 | /* F2008:C567 (R536) A data-i-do-object or a variable that appears |
698 | as a data-stmt-object shall not be an object designator in which |
699 | a pointer appears other than as the entire rightmost part-ref. */ |
700 | if (!e->ref && e->ts.type == BT_DERIVED |
701 | && e->symtree->n.sym->attr.pointer) |
702 | goto partref; |
703 | |
704 | ref = e->ref; |
705 | if (e->symtree->n.sym->ts.type == BT_DERIVED |
706 | && e->symtree->n.sym->attr.pointer |
707 | && ref->type == REF_COMPONENT) |
708 | goto partref; |
709 | |
710 | for (; ref; ref = ref->next) |
711 | if (ref->type == REF_COMPONENT |
712 | && ref->u.c.component->attr.pointer |
713 | && ref->next) |
714 | goto partref; |
715 | } |
716 | |
717 | m = top_val_list (data: new_data); |
718 | if (m != MATCH_YES) |
719 | goto cleanup; |
720 | |
721 | new_data->next = gfc_current_ns->data; |
722 | gfc_current_ns->data = new_data; |
723 | |
724 | /* A BOZ literal constant cannot appear in a structure constructor. |
725 | Check for that here for a data statement value. */ |
726 | if (new_data->value->expr->ts.type == BT_DERIVED |
727 | && new_data->value->expr->value.constructor) |
728 | { |
729 | gfc_constructor *c; |
730 | c = gfc_constructor_first (base: new_data->value->expr->value.constructor); |
731 | for (; c; c = gfc_constructor_next (ctor: c)) |
732 | if (c->expr && c->expr->ts.type == BT_BOZ) |
733 | { |
734 | gfc_error ("BOZ literal constant at %L cannot appear in a " |
735 | "structure constructor" , &c->expr->where); |
736 | return MATCH_ERROR; |
737 | } |
738 | } |
739 | |
740 | if (gfc_match_eos () == MATCH_YES) |
741 | break; |
742 | |
743 | gfc_match_char (','); /* Optional comma */ |
744 | } |
745 | |
746 | set_in_match_data (false); |
747 | |
748 | if (gfc_pure (NULL)) |
749 | { |
750 | gfc_error ("DATA statement at %C is not allowed in a PURE procedure" ); |
751 | return MATCH_ERROR; |
752 | } |
753 | gfc_unset_implicit_pure (gfc_current_ns->proc_name); |
754 | |
755 | return MATCH_YES; |
756 | |
757 | partref: |
758 | |
759 | gfc_error ("part-ref with pointer attribute near %L is not " |
760 | "rightmost part-ref of data-stmt-object" , |
761 | &e->where); |
762 | |
763 | cleanup: |
764 | set_in_match_data (false); |
765 | gfc_free_data (p: new_data); |
766 | return MATCH_ERROR; |
767 | } |
768 | |
769 | |
770 | /************************ Declaration statements *********************/ |
771 | |
772 | |
773 | /* Like gfc_match_init_expr, but matches a 'clist' (old-style initialization |
774 | list). The difference here is the expression is a list of constants |
775 | and is surrounded by '/'. |
776 | The typespec ts must match the typespec of the variable which the |
777 | clist is initializing. |
778 | The arrayspec tells whether this should match a list of constants |
779 | corresponding to array elements or a scalar (as == NULL). */ |
780 | |
781 | static match |
782 | match_clist_expr (gfc_expr **result, gfc_typespec *ts, gfc_array_spec *as) |
783 | { |
784 | gfc_constructor_base array_head = NULL; |
785 | gfc_expr *expr = NULL; |
786 | match m = MATCH_ERROR; |
787 | locus where; |
788 | mpz_t repeat, cons_size, as_size; |
789 | bool scalar; |
790 | int cmp; |
791 | |
792 | gcc_assert (ts); |
793 | |
794 | /* We have already matched '/' - now look for a constant list, as with |
795 | top_val_list from decl.cc, but append the result to an array. */ |
796 | if (gfc_match ("/" ) == MATCH_YES) |
797 | { |
798 | gfc_error ("Empty old style initializer list at %C" ); |
799 | return MATCH_ERROR; |
800 | } |
801 | |
802 | where = gfc_current_locus; |
803 | scalar = !as || !as->rank; |
804 | |
805 | if (!scalar && !spec_size (as, &as_size)) |
806 | { |
807 | gfc_error ("Array in initializer list at %L must have an explicit shape" , |
808 | as->type == AS_EXPLICIT ? &as->upper[0]->where : &where); |
809 | /* Nothing to cleanup yet. */ |
810 | return MATCH_ERROR; |
811 | } |
812 | |
813 | mpz_init_set_ui (repeat, 0); |
814 | |
815 | for (;;) |
816 | { |
817 | m = match_data_constant (result: &expr); |
818 | if (m != MATCH_YES) |
819 | expr = NULL; /* match_data_constant may set expr to garbage */ |
820 | if (m == MATCH_NO) |
821 | goto syntax; |
822 | if (m == MATCH_ERROR) |
823 | goto cleanup; |
824 | |
825 | /* Found r in repeat spec r*c; look for the constant to repeat. */ |
826 | if ( gfc_match_char ('*') == MATCH_YES) |
827 | { |
828 | if (scalar) |
829 | { |
830 | gfc_error ("Repeat spec invalid in scalar initializer at %C" ); |
831 | goto cleanup; |
832 | } |
833 | if (expr->ts.type != BT_INTEGER) |
834 | { |
835 | gfc_error ("Repeat spec must be an integer at %C" ); |
836 | goto cleanup; |
837 | } |
838 | mpz_set (repeat, expr->value.integer); |
839 | gfc_free_expr (expr); |
840 | expr = NULL; |
841 | |
842 | m = match_data_constant (result: &expr); |
843 | if (m == MATCH_NO) |
844 | { |
845 | m = MATCH_ERROR; |
846 | gfc_error ("Expected data constant after repeat spec at %C" ); |
847 | } |
848 | if (m != MATCH_YES) |
849 | goto cleanup; |
850 | } |
851 | /* No repeat spec, we matched the data constant itself. */ |
852 | else |
853 | mpz_set_ui (repeat, 1); |
854 | |
855 | if (!scalar) |
856 | { |
857 | /* Add the constant initializer as many times as repeated. */ |
858 | for (; mpz_cmp_ui (repeat, 0) > 0; mpz_sub_ui (repeat, repeat, 1)) |
859 | { |
860 | /* Make sure types of elements match */ |
861 | if(ts && !gfc_compare_types (&expr->ts, ts) |
862 | && !gfc_convert_type (expr, ts, 1)) |
863 | goto cleanup; |
864 | |
865 | gfc_constructor_append_expr (base: &array_head, |
866 | e: gfc_copy_expr (expr), where: &gfc_current_locus); |
867 | } |
868 | |
869 | gfc_free_expr (expr); |
870 | expr = NULL; |
871 | } |
872 | |
873 | /* For scalar initializers quit after one element. */ |
874 | else |
875 | { |
876 | if(gfc_match_char ('/') != MATCH_YES) |
877 | { |
878 | gfc_error ("End of scalar initializer expected at %C" ); |
879 | goto cleanup; |
880 | } |
881 | break; |
882 | } |
883 | |
884 | if (gfc_match_char ('/') == MATCH_YES) |
885 | break; |
886 | if (gfc_match_char (',') == MATCH_NO) |
887 | goto syntax; |
888 | } |
889 | |
890 | /* If we break early from here out, we encountered an error. */ |
891 | m = MATCH_ERROR; |
892 | |
893 | /* Set up expr as an array constructor. */ |
894 | if (!scalar) |
895 | { |
896 | expr = gfc_get_array_expr (type: ts->type, kind: ts->kind, &where); |
897 | expr->ts = *ts; |
898 | expr->value.constructor = array_head; |
899 | |
900 | /* Validate sizes. We built expr ourselves, so cons_size will be |
901 | constant (we fail above for non-constant expressions). |
902 | We still need to verify that the sizes match. */ |
903 | gcc_assert (gfc_array_size (expr, &cons_size)); |
904 | cmp = mpz_cmp (cons_size, as_size); |
905 | if (cmp < 0) |
906 | gfc_error ("Not enough elements in array initializer at %C" ); |
907 | else if (cmp > 0) |
908 | gfc_error ("Too many elements in array initializer at %C" ); |
909 | mpz_clear (cons_size); |
910 | if (cmp) |
911 | goto cleanup; |
912 | |
913 | /* Set the rank/shape to match the LHS as auto-reshape is implied. */ |
914 | expr->rank = as->rank; |
915 | expr->shape = gfc_get_shape (as->rank); |
916 | for (int i = 0; i < as->rank; ++i) |
917 | spec_dimen_size (as, i, &expr->shape[i]); |
918 | } |
919 | |
920 | /* Make sure scalar types match. */ |
921 | else if (!gfc_compare_types (&expr->ts, ts) |
922 | && !gfc_convert_type (expr, ts, 1)) |
923 | goto cleanup; |
924 | |
925 | if (expr->ts.u.cl) |
926 | expr->ts.u.cl->length_from_typespec = 1; |
927 | |
928 | *result = expr; |
929 | m = MATCH_YES; |
930 | goto done; |
931 | |
932 | syntax: |
933 | m = MATCH_ERROR; |
934 | gfc_error ("Syntax error in old style initializer list at %C" ); |
935 | |
936 | cleanup: |
937 | if (expr) |
938 | expr->value.constructor = NULL; |
939 | gfc_free_expr (expr); |
940 | gfc_constructor_free (base: array_head); |
941 | |
942 | done: |
943 | mpz_clear (repeat); |
944 | if (!scalar) |
945 | mpz_clear (as_size); |
946 | return m; |
947 | } |
948 | |
949 | |
950 | /* Auxiliary function to merge DIMENSION and CODIMENSION array specs. */ |
951 | |
952 | static bool |
953 | merge_array_spec (gfc_array_spec *from, gfc_array_spec *to, bool copy) |
954 | { |
955 | if ((from->type == AS_ASSUMED_RANK && to->corank) |
956 | || (to->type == AS_ASSUMED_RANK && from->corank)) |
957 | { |
958 | gfc_error ("The assumed-rank array at %C shall not have a codimension" ); |
959 | return false; |
960 | } |
961 | |
962 | if (to->rank == 0 && from->rank > 0) |
963 | { |
964 | to->rank = from->rank; |
965 | to->type = from->type; |
966 | to->cray_pointee = from->cray_pointee; |
967 | to->cp_was_assumed = from->cp_was_assumed; |
968 | |
969 | for (int i = to->corank - 1; i >= 0; i--) |
970 | { |
971 | /* Do not exceed the limits on lower[] and upper[]. gfortran |
972 | cleans up elsewhere. */ |
973 | int j = from->rank + i; |
974 | if (j >= GFC_MAX_DIMENSIONS) |
975 | break; |
976 | |
977 | to->lower[j] = to->lower[i]; |
978 | to->upper[j] = to->upper[i]; |
979 | } |
980 | for (int i = 0; i < from->rank; i++) |
981 | { |
982 | if (copy) |
983 | { |
984 | to->lower[i] = gfc_copy_expr (from->lower[i]); |
985 | to->upper[i] = gfc_copy_expr (from->upper[i]); |
986 | } |
987 | else |
988 | { |
989 | to->lower[i] = from->lower[i]; |
990 | to->upper[i] = from->upper[i]; |
991 | } |
992 | } |
993 | } |
994 | else if (to->corank == 0 && from->corank > 0) |
995 | { |
996 | to->corank = from->corank; |
997 | to->cotype = from->cotype; |
998 | |
999 | for (int i = 0; i < from->corank; i++) |
1000 | { |
1001 | /* Do not exceed the limits on lower[] and upper[]. gfortran |
1002 | cleans up elsewhere. */ |
1003 | int k = from->rank + i; |
1004 | int j = to->rank + i; |
1005 | if (j >= GFC_MAX_DIMENSIONS) |
1006 | break; |
1007 | |
1008 | if (copy) |
1009 | { |
1010 | to->lower[j] = gfc_copy_expr (from->lower[k]); |
1011 | to->upper[j] = gfc_copy_expr (from->upper[k]); |
1012 | } |
1013 | else |
1014 | { |
1015 | to->lower[j] = from->lower[k]; |
1016 | to->upper[j] = from->upper[k]; |
1017 | } |
1018 | } |
1019 | } |
1020 | |
1021 | if (to->rank + to->corank > GFC_MAX_DIMENSIONS) |
1022 | { |
1023 | gfc_error ("Sum of array rank %d and corank %d at %C exceeds maximum " |
1024 | "allowed dimensions of %d" , |
1025 | to->rank, to->corank, GFC_MAX_DIMENSIONS); |
1026 | to->corank = GFC_MAX_DIMENSIONS - to->rank; |
1027 | return false; |
1028 | } |
1029 | return true; |
1030 | } |
1031 | |
1032 | |
1033 | /* Match an intent specification. Since this can only happen after an |
1034 | INTENT word, a legal intent-spec must follow. */ |
1035 | |
1036 | static sym_intent |
1037 | match_intent_spec (void) |
1038 | { |
1039 | |
1040 | if (gfc_match (" ( in out )" ) == MATCH_YES) |
1041 | return INTENT_INOUT; |
1042 | if (gfc_match (" ( in )" ) == MATCH_YES) |
1043 | return INTENT_IN; |
1044 | if (gfc_match (" ( out )" ) == MATCH_YES) |
1045 | return INTENT_OUT; |
1046 | |
1047 | gfc_error ("Bad INTENT specification at %C" ); |
1048 | return INTENT_UNKNOWN; |
1049 | } |
1050 | |
1051 | |
1052 | /* Matches a character length specification, which is either a |
1053 | specification expression, '*', or ':'. */ |
1054 | |
1055 | static match |
1056 | char_len_param_value (gfc_expr **expr, bool *deferred) |
1057 | { |
1058 | match m; |
1059 | gfc_expr *p; |
1060 | |
1061 | *expr = NULL; |
1062 | *deferred = false; |
1063 | |
1064 | if (gfc_match_char ('*') == MATCH_YES) |
1065 | return MATCH_YES; |
1066 | |
1067 | if (gfc_match_char (':') == MATCH_YES) |
1068 | { |
1069 | if (!gfc_notify_std (GFC_STD_F2003, "deferred type parameter at %C" )) |
1070 | return MATCH_ERROR; |
1071 | |
1072 | *deferred = true; |
1073 | |
1074 | return MATCH_YES; |
1075 | } |
1076 | |
1077 | m = gfc_match_expr (expr); |
1078 | |
1079 | if (m == MATCH_NO || m == MATCH_ERROR) |
1080 | return m; |
1081 | |
1082 | if (!gfc_expr_check_typed (*expr, gfc_current_ns, false)) |
1083 | return MATCH_ERROR; |
1084 | |
1085 | /* Try to simplify the expression to catch things like CHARACTER(([1])). */ |
1086 | p = gfc_copy_expr (*expr); |
1087 | if (gfc_is_constant_expr (p) && gfc_simplify_expr (p, 1)) |
1088 | gfc_replace_expr (*expr, p); |
1089 | else |
1090 | gfc_free_expr (p); |
1091 | |
1092 | if ((*expr)->expr_type == EXPR_FUNCTION) |
1093 | { |
1094 | if ((*expr)->ts.type == BT_INTEGER |
1095 | || ((*expr)->ts.type == BT_UNKNOWN |
1096 | && strcmp(s1: (*expr)->symtree->name, s2: "null" ) != 0)) |
1097 | return MATCH_YES; |
1098 | |
1099 | goto syntax; |
1100 | } |
1101 | else if ((*expr)->expr_type == EXPR_CONSTANT) |
1102 | { |
1103 | /* F2008, 4.4.3.1: The length is a type parameter; its kind is |
1104 | processor dependent and its value is greater than or equal to zero. |
1105 | F2008, 4.4.3.2: If the character length parameter value evaluates |
1106 | to a negative value, the length of character entities declared |
1107 | is zero. */ |
1108 | |
1109 | if ((*expr)->ts.type == BT_INTEGER) |
1110 | { |
1111 | if (mpz_cmp_si ((*expr)->value.integer, 0) < 0) |
1112 | mpz_set_si ((*expr)->value.integer, 0); |
1113 | } |
1114 | else |
1115 | goto syntax; |
1116 | } |
1117 | else if ((*expr)->expr_type == EXPR_ARRAY) |
1118 | goto syntax; |
1119 | else if ((*expr)->expr_type == EXPR_VARIABLE) |
1120 | { |
1121 | bool t; |
1122 | gfc_expr *e; |
1123 | |
1124 | e = gfc_copy_expr (*expr); |
1125 | |
1126 | /* This catches the invalid code "[character(m(2:3)) :: 'x', 'y']", |
1127 | which causes an ICE if gfc_reduce_init_expr() is called. */ |
1128 | if (e->ref && e->ref->type == REF_ARRAY |
1129 | && e->ref->u.ar.type == AR_UNKNOWN |
1130 | && e->ref->u.ar.dimen_type[0] == DIMEN_RANGE) |
1131 | goto syntax; |
1132 | |
1133 | t = gfc_reduce_init_expr (expr: e); |
1134 | |
1135 | if (!t && e->ts.type == BT_UNKNOWN |
1136 | && e->symtree->n.sym->attr.untyped == 1 |
1137 | && (flag_implicit_none |
1138 | || e->symtree->n.sym->ns->seen_implicit_none == 1 |
1139 | || e->symtree->n.sym->ns->parent->seen_implicit_none == 1)) |
1140 | { |
1141 | gfc_free_expr (e); |
1142 | goto syntax; |
1143 | } |
1144 | |
1145 | if ((e->ref && e->ref->type == REF_ARRAY |
1146 | && e->ref->u.ar.type != AR_ELEMENT) |
1147 | || (!e->ref && e->expr_type == EXPR_ARRAY)) |
1148 | { |
1149 | gfc_free_expr (e); |
1150 | goto syntax; |
1151 | } |
1152 | |
1153 | gfc_free_expr (e); |
1154 | } |
1155 | |
1156 | if (gfc_seen_div0) |
1157 | m = MATCH_ERROR; |
1158 | |
1159 | return m; |
1160 | |
1161 | syntax: |
1162 | gfc_error ("Scalar INTEGER expression expected at %L" , &(*expr)->where); |
1163 | return MATCH_ERROR; |
1164 | } |
1165 | |
1166 | |
1167 | /* A character length is a '*' followed by a literal integer or a |
1168 | char_len_param_value in parenthesis. */ |
1169 | |
1170 | static match |
1171 | match_char_length (gfc_expr **expr, bool *deferred, bool obsolescent_check) |
1172 | { |
1173 | int length; |
1174 | match m; |
1175 | |
1176 | *deferred = false; |
1177 | m = gfc_match_char ('*'); |
1178 | if (m != MATCH_YES) |
1179 | return m; |
1180 | |
1181 | m = gfc_match_small_literal_int (&length, NULL); |
1182 | if (m == MATCH_ERROR) |
1183 | return m; |
1184 | |
1185 | if (m == MATCH_YES) |
1186 | { |
1187 | if (obsolescent_check |
1188 | && !gfc_notify_std (GFC_STD_F95_OBS, "Old-style character length at %C" )) |
1189 | return MATCH_ERROR; |
1190 | *expr = gfc_get_int_expr (gfc_charlen_int_kind, NULL, length); |
1191 | return m; |
1192 | } |
1193 | |
1194 | if (gfc_match_char ('(') == MATCH_NO) |
1195 | goto syntax; |
1196 | |
1197 | m = char_len_param_value (expr, deferred); |
1198 | if (m != MATCH_YES && gfc_matching_function) |
1199 | { |
1200 | gfc_undo_symbols (); |
1201 | m = MATCH_YES; |
1202 | } |
1203 | |
1204 | if (m == MATCH_ERROR) |
1205 | return m; |
1206 | if (m == MATCH_NO) |
1207 | goto syntax; |
1208 | |
1209 | if (gfc_match_char (')') == MATCH_NO) |
1210 | { |
1211 | gfc_free_expr (*expr); |
1212 | *expr = NULL; |
1213 | goto syntax; |
1214 | } |
1215 | |
1216 | return MATCH_YES; |
1217 | |
1218 | syntax: |
1219 | gfc_error ("Syntax error in character length specification at %C" ); |
1220 | return MATCH_ERROR; |
1221 | } |
1222 | |
1223 | |
1224 | /* Special subroutine for finding a symbol. Check if the name is found |
1225 | in the current name space. If not, and we're compiling a function or |
1226 | subroutine and the parent compilation unit is an interface, then check |
1227 | to see if the name we've been given is the name of the interface |
1228 | (located in another namespace). */ |
1229 | |
1230 | static int |
1231 | find_special (const char *name, gfc_symbol **result, bool allow_subroutine) |
1232 | { |
1233 | gfc_state_data *s; |
1234 | gfc_symtree *st; |
1235 | int i; |
1236 | |
1237 | i = gfc_get_sym_tree (name, NULL, &st, allow_subroutine); |
1238 | if (i == 0) |
1239 | { |
1240 | *result = st ? st->n.sym : NULL; |
1241 | goto end; |
1242 | } |
1243 | |
1244 | if (gfc_current_state () != COMP_SUBROUTINE |
1245 | && gfc_current_state () != COMP_FUNCTION) |
1246 | goto end; |
1247 | |
1248 | s = gfc_state_stack->previous; |
1249 | if (s == NULL) |
1250 | goto end; |
1251 | |
1252 | if (s->state != COMP_INTERFACE) |
1253 | goto end; |
1254 | if (s->sym == NULL) |
1255 | goto end; /* Nameless interface. */ |
1256 | |
1257 | if (strcmp (s1: name, s2: s->sym->name) == 0) |
1258 | { |
1259 | *result = s->sym; |
1260 | return 0; |
1261 | } |
1262 | |
1263 | end: |
1264 | return i; |
1265 | } |
1266 | |
1267 | |
1268 | /* Special subroutine for getting a symbol node associated with a |
1269 | procedure name, used in SUBROUTINE and FUNCTION statements. The |
1270 | symbol is created in the parent using with symtree node in the |
1271 | child unit pointing to the symbol. If the current namespace has no |
1272 | parent, then the symbol is just created in the current unit. */ |
1273 | |
1274 | static int |
1275 | get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry) |
1276 | { |
1277 | gfc_symtree *st; |
1278 | gfc_symbol *sym; |
1279 | int rc = 0; |
1280 | |
1281 | /* Module functions have to be left in their own namespace because |
1282 | they have potentially (almost certainly!) already been referenced. |
1283 | In this sense, they are rather like external functions. This is |
1284 | fixed up in resolve.cc(resolve_entries), where the symbol name- |
1285 | space is set to point to the master function, so that the fake |
1286 | result mechanism can work. */ |
1287 | if (module_fcn_entry) |
1288 | { |
1289 | /* Present if entry is declared to be a module procedure. */ |
1290 | rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result); |
1291 | |
1292 | if (*result == NULL) |
1293 | rc = gfc_get_symbol (name, NULL, result); |
1294 | else if (!gfc_get_symbol (name, NULL, &sym) && sym |
1295 | && (*result)->ts.type == BT_UNKNOWN |
1296 | && sym->attr.flavor == FL_UNKNOWN) |
1297 | /* Pick up the typespec for the entry, if declared in the function |
1298 | body. Note that this symbol is FL_UNKNOWN because it will |
1299 | only have appeared in a type declaration. The local symtree |
1300 | is set to point to the module symbol and a unique symtree |
1301 | to the local version. This latter ensures a correct clearing |
1302 | of the symbols. */ |
1303 | { |
1304 | /* If the ENTRY proceeds its specification, we need to ensure |
1305 | that this does not raise a "has no IMPLICIT type" error. */ |
1306 | if (sym->ts.type == BT_UNKNOWN) |
1307 | sym->attr.untyped = 1; |
1308 | |
1309 | (*result)->ts = sym->ts; |
1310 | |
1311 | /* Put the symbol in the procedure namespace so that, should |
1312 | the ENTRY precede its specification, the specification |
1313 | can be applied. */ |
1314 | (*result)->ns = gfc_current_ns; |
1315 | |
1316 | gfc_find_sym_tree (name, gfc_current_ns, 0, &st); |
1317 | st->n.sym = *result; |
1318 | st = gfc_get_unique_symtree (gfc_current_ns); |
1319 | sym->refs++; |
1320 | st->n.sym = sym; |
1321 | } |
1322 | } |
1323 | else |
1324 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); |
1325 | |
1326 | if (rc) |
1327 | return rc; |
1328 | |
1329 | sym = *result; |
1330 | if (sym->attr.proc == PROC_ST_FUNCTION) |
1331 | return rc; |
1332 | |
1333 | if (sym->attr.module_procedure && sym->attr.if_source == IFSRC_IFBODY) |
1334 | { |
1335 | /* Create a partially populated interface symbol to carry the |
1336 | characteristics of the procedure and the result. */ |
1337 | sym->tlink = gfc_new_symbol (name, sym->ns); |
1338 | gfc_add_type (sym->tlink, &(sym->ts), &gfc_current_locus); |
1339 | gfc_copy_attr (&sym->tlink->attr, &sym->attr, NULL); |
1340 | if (sym->attr.dimension) |
1341 | sym->tlink->as = gfc_copy_array_spec (sym->as); |
1342 | |
1343 | /* Ideally, at this point, a copy would be made of the formal |
1344 | arguments and their namespace. However, this does not appear |
1345 | to be necessary, albeit at the expense of not being able to |
1346 | use gfc_compare_interfaces directly. */ |
1347 | |
1348 | if (sym->result && sym->result != sym) |
1349 | { |
1350 | sym->tlink->result = sym->result; |
1351 | sym->result = NULL; |
1352 | } |
1353 | else if (sym->result) |
1354 | { |
1355 | sym->tlink->result = sym->tlink; |
1356 | } |
1357 | } |
1358 | else if (sym && !sym->gfc_new |
1359 | && gfc_current_state () != COMP_INTERFACE) |
1360 | { |
1361 | /* Trap another encompassed procedure with the same name. All |
1362 | these conditions are necessary to avoid picking up an entry |
1363 | whose name clashes with that of the encompassing procedure; |
1364 | this is handled using gsymbols to register unique, globally |
1365 | accessible names. */ |
1366 | if (sym->attr.flavor != 0 |
1367 | && sym->attr.proc != 0 |
1368 | && (sym->attr.subroutine || sym->attr.function || sym->attr.entry) |
1369 | && sym->attr.if_source != IFSRC_UNKNOWN) |
1370 | { |
1371 | gfc_error_now ("Procedure %qs at %C is already defined at %L" , |
1372 | name, &sym->declared_at); |
1373 | return true; |
1374 | } |
1375 | if (sym->attr.flavor != 0 |
1376 | && sym->attr.entry && sym->attr.if_source != IFSRC_UNKNOWN) |
1377 | { |
1378 | gfc_error_now ("Procedure %qs at %C is already defined at %L" , |
1379 | name, &sym->declared_at); |
1380 | return true; |
1381 | } |
1382 | |
1383 | if (sym->attr.external && sym->attr.procedure |
1384 | && gfc_current_state () == COMP_CONTAINS) |
1385 | { |
1386 | gfc_error_now ("Contained procedure %qs at %C clashes with " |
1387 | "procedure defined at %L" , |
1388 | name, &sym->declared_at); |
1389 | return true; |
1390 | } |
1391 | |
1392 | /* Trap a procedure with a name the same as interface in the |
1393 | encompassing scope. */ |
1394 | if (sym->attr.generic != 0 |
1395 | && (sym->attr.subroutine || sym->attr.function) |
1396 | && !sym->attr.mod_proc) |
1397 | { |
1398 | gfc_error_now ("Name %qs at %C is already defined" |
1399 | " as a generic interface at %L" , |
1400 | name, &sym->declared_at); |
1401 | return true; |
1402 | } |
1403 | |
1404 | /* Trap declarations of attributes in encompassing scope. The |
1405 | signature for this is that ts.kind is nonzero for no-CLASS |
1406 | entity. For a CLASS entity, ts.kind is zero. */ |
1407 | if ((sym->ts.kind != 0 |
1408 | || sym->ts.type == BT_CLASS |
1409 | || sym->ts.type == BT_DERIVED) |
1410 | && !sym->attr.implicit_type |
1411 | && sym->attr.proc == 0 |
1412 | && gfc_current_ns->parent != NULL |
1413 | && sym->attr.access == 0 |
1414 | && !module_fcn_entry) |
1415 | { |
1416 | gfc_error_now ("Procedure %qs at %C has an explicit interface " |
1417 | "from a previous declaration" , name); |
1418 | return true; |
1419 | } |
1420 | } |
1421 | |
1422 | /* C1246 (R1225) MODULE shall appear only in the function-stmt or |
1423 | subroutine-stmt of a module subprogram or of a nonabstract interface |
1424 | body that is declared in the scoping unit of a module or submodule. */ |
1425 | if (sym->attr.external |
1426 | && (sym->attr.subroutine || sym->attr.function) |
1427 | && sym->attr.if_source == IFSRC_IFBODY |
1428 | && !current_attr.module_procedure |
1429 | && sym->attr.proc == PROC_MODULE |
1430 | && gfc_state_stack->state == COMP_CONTAINS) |
1431 | { |
1432 | gfc_error_now ("Procedure %qs defined in interface body at %L " |
1433 | "clashes with internal procedure defined at %C" , |
1434 | name, &sym->declared_at); |
1435 | return true; |
1436 | } |
1437 | |
1438 | if (sym && !sym->gfc_new |
1439 | && sym->attr.flavor != FL_UNKNOWN |
1440 | && sym->attr.referenced == 0 && sym->attr.subroutine == 1 |
1441 | && gfc_state_stack->state == COMP_CONTAINS |
1442 | && gfc_state_stack->previous->state == COMP_SUBROUTINE) |
1443 | { |
1444 | gfc_error_now ("Procedure %qs at %C is already defined at %L" , |
1445 | name, &sym->declared_at); |
1446 | return true; |
1447 | } |
1448 | |
1449 | if (gfc_current_ns->parent == NULL || *result == NULL) |
1450 | return rc; |
1451 | |
1452 | /* Module function entries will already have a symtree in |
1453 | the current namespace but will need one at module level. */ |
1454 | if (module_fcn_entry) |
1455 | { |
1456 | /* Present if entry is declared to be a module procedure. */ |
1457 | rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st); |
1458 | if (st == NULL) |
1459 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); |
1460 | } |
1461 | else |
1462 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); |
1463 | |
1464 | st->n.sym = sym; |
1465 | sym->refs++; |
1466 | |
1467 | /* See if the procedure should be a module procedure. */ |
1468 | |
1469 | if (((sym->ns->proc_name != NULL |
1470 | && sym->ns->proc_name->attr.flavor == FL_MODULE |
1471 | && sym->attr.proc != PROC_MODULE) |
1472 | || (module_fcn_entry && sym->attr.proc != PROC_MODULE)) |
1473 | && !gfc_add_procedure (&sym->attr, PROC_MODULE, sym->name, NULL)) |
1474 | rc = 2; |
1475 | |
1476 | return rc; |
1477 | } |
1478 | |
1479 | |
1480 | /* Verify that the given symbol representing a parameter is C |
1481 | interoperable, by checking to see if it was marked as such after |
1482 | its declaration. If the given symbol is not interoperable, a |
1483 | warning is reported, thus removing the need to return the status to |
1484 | the calling function. The standard does not require the user use |
1485 | one of the iso_c_binding named constants to declare an |
1486 | interoperable parameter, but we can't be sure if the param is C |
1487 | interop or not if the user doesn't. For example, integer(4) may be |
1488 | legal Fortran, but doesn't have meaning in C. It may interop with |
1489 | a number of the C types, which causes a problem because the |
1490 | compiler can't know which one. This code is almost certainly not |
1491 | portable, and the user will get what they deserve if the C type |
1492 | across platforms isn't always interoperable with integer(4). If |
1493 | the user had used something like integer(c_int) or integer(c_long), |
1494 | the compiler could have automatically handled the varying sizes |
1495 | across platforms. */ |
1496 | |
1497 | bool |
1498 | gfc_verify_c_interop_param (gfc_symbol *sym) |
1499 | { |
1500 | int is_c_interop = 0; |
1501 | bool retval = true; |
1502 | |
1503 | /* We check implicitly typed variables in symbol.cc:gfc_set_default_type(). |
1504 | Don't repeat the checks here. */ |
1505 | if (sym->attr.implicit_type) |
1506 | return true; |
1507 | |
1508 | /* For subroutines or functions that are passed to a BIND(C) procedure, |
1509 | they're interoperable if they're BIND(C) and their params are all |
1510 | interoperable. */ |
1511 | if (sym->attr.flavor == FL_PROCEDURE) |
1512 | { |
1513 | if (sym->attr.is_bind_c == 0) |
1514 | { |
1515 | gfc_error_now ("Procedure %qs at %L must have the BIND(C) " |
1516 | "attribute to be C interoperable" , sym->name, |
1517 | &(sym->declared_at)); |
1518 | return false; |
1519 | } |
1520 | else |
1521 | { |
1522 | if (sym->attr.is_c_interop == 1) |
1523 | /* We've already checked this procedure; don't check it again. */ |
1524 | return true; |
1525 | else |
1526 | return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common, |
1527 | sym->common_block); |
1528 | } |
1529 | } |
1530 | |
1531 | /* See if we've stored a reference to a procedure that owns sym. */ |
1532 | if (sym->ns != NULL && sym->ns->proc_name != NULL) |
1533 | { |
1534 | if (sym->ns->proc_name->attr.is_bind_c == 1) |
1535 | { |
1536 | is_c_interop = (gfc_verify_c_interop(&(sym->ts)) ? 1 : 0); |
1537 | |
1538 | if (is_c_interop != 1) |
1539 | { |
1540 | /* Make personalized messages to give better feedback. */ |
1541 | if (sym->ts.type == BT_DERIVED) |
1542 | gfc_error ("Variable %qs at %L is a dummy argument to the " |
1543 | "BIND(C) procedure %qs but is not C interoperable " |
1544 | "because derived type %qs is not C interoperable" , |
1545 | sym->name, &(sym->declared_at), |
1546 | sym->ns->proc_name->name, |
1547 | sym->ts.u.derived->name); |
1548 | else if (sym->ts.type == BT_CLASS) |
1549 | gfc_error ("Variable %qs at %L is a dummy argument to the " |
1550 | "BIND(C) procedure %qs but is not C interoperable " |
1551 | "because it is polymorphic" , |
1552 | sym->name, &(sym->declared_at), |
1553 | sym->ns->proc_name->name); |
1554 | else if (warn_c_binding_type) |
1555 | gfc_warning (opt: OPT_Wc_binding_type, |
1556 | "Variable %qs at %L is a dummy argument of the " |
1557 | "BIND(C) procedure %qs but may not be C " |
1558 | "interoperable" , |
1559 | sym->name, &(sym->declared_at), |
1560 | sym->ns->proc_name->name); |
1561 | } |
1562 | |
1563 | /* Per F2018, 18.3.6 (5), pointer + contiguous is not permitted. */ |
1564 | if (sym->attr.pointer && sym->attr.contiguous) |
1565 | gfc_error ("Dummy argument %qs at %L may not be a pointer with " |
1566 | "CONTIGUOUS attribute as procedure %qs is BIND(C)" , |
1567 | sym->name, &sym->declared_at, sym->ns->proc_name->name); |
1568 | |
1569 | /* Per F2018, C1557, pointer/allocatable dummies to a bind(c) |
1570 | procedure that are default-initialized are not permitted. */ |
1571 | if ((sym->attr.pointer || sym->attr.allocatable) |
1572 | && sym->ts.type == BT_DERIVED |
1573 | && gfc_has_default_initializer (sym->ts.u.derived)) |
1574 | { |
1575 | gfc_error ("Default-initialized %s dummy argument %qs " |
1576 | "at %L is not permitted in BIND(C) procedure %qs" , |
1577 | (sym->attr.pointer ? "pointer" : "allocatable" ), |
1578 | sym->name, &sym->declared_at, |
1579 | sym->ns->proc_name->name); |
1580 | retval = false; |
1581 | } |
1582 | |
1583 | /* Character strings are only C interoperable if they have a |
1584 | length of 1. However, as an argument they are also interoperable |
1585 | when passed as descriptor (which requires len=: or len=*). */ |
1586 | if (sym->ts.type == BT_CHARACTER) |
1587 | { |
1588 | gfc_charlen *cl = sym->ts.u.cl; |
1589 | |
1590 | if (sym->attr.allocatable || sym->attr.pointer) |
1591 | { |
1592 | /* F2018, 18.3.6 (6). */ |
1593 | if (!sym->ts.deferred) |
1594 | { |
1595 | if (sym->attr.allocatable) |
1596 | gfc_error ("Allocatable character dummy argument %qs " |
1597 | "at %L must have deferred length as " |
1598 | "procedure %qs is BIND(C)" , sym->name, |
1599 | &sym->declared_at, sym->ns->proc_name->name); |
1600 | else |
1601 | gfc_error ("Pointer character dummy argument %qs at %L " |
1602 | "must have deferred length as procedure %qs " |
1603 | "is BIND(C)" , sym->name, &sym->declared_at, |
1604 | sym->ns->proc_name->name); |
1605 | retval = false; |
1606 | } |
1607 | else if (!gfc_notify_std (GFC_STD_F2018, |
1608 | "Deferred-length character dummy " |
1609 | "argument %qs at %L of procedure " |
1610 | "%qs with BIND(C) attribute" , |
1611 | sym->name, &sym->declared_at, |
1612 | sym->ns->proc_name->name)) |
1613 | retval = false; |
1614 | } |
1615 | else if (sym->attr.value |
1616 | && (!cl || !cl->length |
1617 | || cl->length->expr_type != EXPR_CONSTANT |
1618 | || mpz_cmp_si (cl->length->value.integer, 1) != 0)) |
1619 | { |
1620 | gfc_error ("Character dummy argument %qs at %L must be " |
1621 | "of length 1 as it has the VALUE attribute" , |
1622 | sym->name, &sym->declared_at); |
1623 | retval = false; |
1624 | } |
1625 | else if (!cl || !cl->length) |
1626 | { |
1627 | /* Assumed length; F2018, 18.3.6 (5)(2). |
1628 | Uses the CFI array descriptor - also for scalars and |
1629 | explicit-size/assumed-size arrays. */ |
1630 | if (!gfc_notify_std (GFC_STD_F2018, |
1631 | "Assumed-length character dummy argument " |
1632 | "%qs at %L of procedure %qs with BIND(C) " |
1633 | "attribute" , sym->name, &sym->declared_at, |
1634 | sym->ns->proc_name->name)) |
1635 | retval = false; |
1636 | } |
1637 | else if (cl->length->expr_type != EXPR_CONSTANT |
1638 | || mpz_cmp_si (cl->length->value.integer, 1) != 0) |
1639 | { |
1640 | /* F2018, 18.3.6, (5), item 4. */ |
1641 | if (!sym->attr.dimension |
1642 | || sym->as->type == AS_ASSUMED_SIZE |
1643 | || sym->as->type == AS_EXPLICIT) |
1644 | { |
1645 | gfc_error ("Character dummy argument %qs at %L must be " |
1646 | "of constant length of one or assumed length, " |
1647 | "unless it has assumed shape or assumed rank, " |
1648 | "as procedure %qs has the BIND(C) attribute" , |
1649 | sym->name, &sym->declared_at, |
1650 | sym->ns->proc_name->name); |
1651 | retval = false; |
1652 | } |
1653 | /* else: valid only since F2018 - and an assumed-shape/rank |
1654 | array; however, gfc_notify_std is already called when |
1655 | those array types are used. Thus, silently accept F200x. */ |
1656 | } |
1657 | } |
1658 | |
1659 | /* We have to make sure that any param to a bind(c) routine does |
1660 | not have the allocatable, pointer, or optional attributes, |
1661 | according to J3/04-007, section 5.1. */ |
1662 | if (sym->attr.allocatable == 1 |
1663 | && !gfc_notify_std (GFC_STD_F2018, "Variable %qs at %L with " |
1664 | "ALLOCATABLE attribute in procedure %qs " |
1665 | "with BIND(C)" , sym->name, |
1666 | &(sym->declared_at), |
1667 | sym->ns->proc_name->name)) |
1668 | retval = false; |
1669 | |
1670 | if (sym->attr.pointer == 1 |
1671 | && !gfc_notify_std (GFC_STD_F2018, "Variable %qs at %L with " |
1672 | "POINTER attribute in procedure %qs " |
1673 | "with BIND(C)" , sym->name, |
1674 | &(sym->declared_at), |
1675 | sym->ns->proc_name->name)) |
1676 | retval = false; |
1677 | |
1678 | if (sym->attr.optional == 1 && sym->attr.value) |
1679 | { |
1680 | gfc_error ("Variable %qs at %L cannot have both the OPTIONAL " |
1681 | "and the VALUE attribute because procedure %qs " |
1682 | "is BIND(C)" , sym->name, &(sym->declared_at), |
1683 | sym->ns->proc_name->name); |
1684 | retval = false; |
1685 | } |
1686 | else if (sym->attr.optional == 1 |
1687 | && !gfc_notify_std (GFC_STD_F2018, "Variable %qs " |
1688 | "at %L with OPTIONAL attribute in " |
1689 | "procedure %qs which is BIND(C)" , |
1690 | sym->name, &(sym->declared_at), |
1691 | sym->ns->proc_name->name)) |
1692 | retval = false; |
1693 | |
1694 | /* Make sure that if it has the dimension attribute, that it is |
1695 | either assumed size or explicit shape. Deferred shape is already |
1696 | covered by the pointer/allocatable attribute. */ |
1697 | if (sym->as != NULL && sym->as->type == AS_ASSUMED_SHAPE |
1698 | && !gfc_notify_std (GFC_STD_F2018, "Assumed-shape array %qs " |
1699 | "at %L as dummy argument to the BIND(C) " |
1700 | "procedure %qs at %L" , sym->name, |
1701 | &(sym->declared_at), |
1702 | sym->ns->proc_name->name, |
1703 | &(sym->ns->proc_name->declared_at))) |
1704 | retval = false; |
1705 | } |
1706 | } |
1707 | |
1708 | return retval; |
1709 | } |
1710 | |
1711 | |
1712 | |
1713 | /* Function called by variable_decl() that adds a name to the symbol table. */ |
1714 | |
1715 | static bool |
1716 | build_sym (const char *name, gfc_charlen *cl, bool cl_deferred, |
1717 | gfc_array_spec **as, locus *var_locus) |
1718 | { |
1719 | symbol_attribute attr; |
1720 | gfc_symbol *sym; |
1721 | int upper; |
1722 | gfc_symtree *st; |
1723 | |
1724 | /* Symbols in a submodule are host associated from the parent module or |
1725 | submodules. Therefore, they can be overridden by declarations in the |
1726 | submodule scope. Deal with this by attaching the existing symbol to |
1727 | a new symtree and recycling the old symtree with a new symbol... */ |
1728 | st = gfc_find_symtree (gfc_current_ns->sym_root, name); |
1729 | if (st != NULL && gfc_state_stack->state == COMP_SUBMODULE |
1730 | && st->n.sym != NULL |
1731 | && st->n.sym->attr.host_assoc && st->n.sym->attr.used_in_submodule) |
1732 | { |
1733 | gfc_symtree *s = gfc_get_unique_symtree (gfc_current_ns); |
1734 | s->n.sym = st->n.sym; |
1735 | sym = gfc_new_symbol (name, gfc_current_ns); |
1736 | |
1737 | |
1738 | st->n.sym = sym; |
1739 | sym->refs++; |
1740 | gfc_set_sym_referenced (sym); |
1741 | } |
1742 | /* ...Otherwise generate a new symtree and new symbol. */ |
1743 | else if (gfc_get_symbol (name, NULL, &sym)) |
1744 | return false; |
1745 | |
1746 | /* Check if the name has already been defined as a type. The |
1747 | first letter of the symtree will be in upper case then. Of |
1748 | course, this is only necessary if the upper case letter is |
1749 | actually different. */ |
1750 | |
1751 | upper = TOUPPER(name[0]); |
1752 | if (upper != name[0]) |
1753 | { |
1754 | char u_name[GFC_MAX_SYMBOL_LEN + 1]; |
1755 | gfc_symtree *st; |
1756 | |
1757 | gcc_assert (strlen(name) <= GFC_MAX_SYMBOL_LEN); |
1758 | strcpy (dest: u_name, src: name); |
1759 | u_name[0] = upper; |
1760 | |
1761 | st = gfc_find_symtree (gfc_current_ns->sym_root, u_name); |
1762 | |
1763 | /* STRUCTURE types can alias symbol names */ |
1764 | if (st != 0 && st->n.sym->attr.flavor != FL_STRUCT) |
1765 | { |
1766 | gfc_error ("Symbol %qs at %C also declared as a type at %L" , name, |
1767 | &st->n.sym->declared_at); |
1768 | return false; |
1769 | } |
1770 | } |
1771 | |
1772 | /* Start updating the symbol table. Add basic type attribute if present. */ |
1773 | if (current_ts.type != BT_UNKNOWN |
1774 | && (sym->attr.implicit_type == 0 |
1775 | || !gfc_compare_types (&sym->ts, ¤t_ts)) |
1776 | && !gfc_add_type (sym, ¤t_ts, var_locus)) |
1777 | return false; |
1778 | |
1779 | if (sym->ts.type == BT_CHARACTER) |
1780 | { |
1781 | sym->ts.u.cl = cl; |
1782 | sym->ts.deferred = cl_deferred; |
1783 | } |
1784 | |
1785 | /* Add dimension attribute if present. */ |
1786 | if (!gfc_set_array_spec (sym, *as, var_locus)) |
1787 | return false; |
1788 | *as = NULL; |
1789 | |
1790 | /* Add attribute to symbol. The copy is so that we can reset the |
1791 | dimension attribute. */ |
1792 | attr = current_attr; |
1793 | attr.dimension = 0; |
1794 | attr.codimension = 0; |
1795 | |
1796 | if (!gfc_copy_attr (&sym->attr, &attr, var_locus)) |
1797 | return false; |
1798 | |
1799 | /* Finish any work that may need to be done for the binding label, |
1800 | if it's a bind(c). The bind(c) attr is found before the symbol |
1801 | is made, and before the symbol name (for data decls), so the |
1802 | current_ts is holding the binding label, or nothing if the |
1803 | name= attr wasn't given. Therefore, test here if we're dealing |
1804 | with a bind(c) and make sure the binding label is set correctly. */ |
1805 | if (sym->attr.is_bind_c == 1) |
1806 | { |
1807 | if (!sym->binding_label) |
1808 | { |
1809 | /* Set the binding label and verify that if a NAME= was specified |
1810 | then only one identifier was in the entity-decl-list. */ |
1811 | if (!set_binding_label (&sym->binding_label, sym->name, |
1812 | num_idents_on_line)) |
1813 | return false; |
1814 | } |
1815 | } |
1816 | |
1817 | /* See if we know we're in a common block, and if it's a bind(c) |
1818 | common then we need to make sure we're an interoperable type. */ |
1819 | if (sym->attr.in_common == 1) |
1820 | { |
1821 | /* Test the common block object. */ |
1822 | if (sym->common_block != NULL && sym->common_block->is_bind_c == 1 |
1823 | && sym->ts.is_c_interop != 1) |
1824 | { |
1825 | gfc_error_now ("Variable %qs in common block %qs at %C " |
1826 | "must be declared with a C interoperable " |
1827 | "kind since common block %qs is BIND(C)" , |
1828 | sym->name, sym->common_block->name, |
1829 | sym->common_block->name); |
1830 | gfc_clear_error (); |
1831 | } |
1832 | } |
1833 | |
1834 | sym->attr.implied_index = 0; |
1835 | |
1836 | /* Use the parameter expressions for a parameterized derived type. */ |
1837 | if ((sym->ts.type == BT_DERIVED || sym->ts.type == BT_CLASS) |
1838 | && sym->ts.u.derived->attr.pdt_type && type_param_spec_list) |
1839 | sym->param_list = gfc_copy_actual_arglist (type_param_spec_list); |
1840 | |
1841 | if (sym->ts.type == BT_CLASS) |
1842 | return gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as); |
1843 | |
1844 | return true; |
1845 | } |
1846 | |
1847 | |
1848 | /* Set character constant to the given length. The constant will be padded or |
1849 | truncated. If we're inside an array constructor without a typespec, we |
1850 | additionally check that all elements have the same length; check_len -1 |
1851 | means no checking. */ |
1852 | |
1853 | void |
1854 | gfc_set_constant_character_len (gfc_charlen_t len, gfc_expr *expr, |
1855 | gfc_charlen_t check_len) |
1856 | { |
1857 | gfc_char_t *s; |
1858 | gfc_charlen_t slen; |
1859 | |
1860 | if (expr->ts.type != BT_CHARACTER) |
1861 | return; |
1862 | |
1863 | if (expr->expr_type != EXPR_CONSTANT) |
1864 | { |
1865 | gfc_error_now ("CHARACTER length must be a constant at %L" , &expr->where); |
1866 | return; |
1867 | } |
1868 | |
1869 | slen = expr->value.character.length; |
1870 | if (len != slen) |
1871 | { |
1872 | s = gfc_get_wide_string (len + 1); |
1873 | memcpy (dest: s, src: expr->value.character.string, |
1874 | MIN (len, slen) * sizeof (gfc_char_t)); |
1875 | if (len > slen) |
1876 | gfc_wide_memset (&s[slen], ' ', len - slen); |
1877 | |
1878 | if (warn_character_truncation && slen > len) |
1879 | gfc_warning_now (opt: OPT_Wcharacter_truncation, |
1880 | "CHARACTER expression at %L is being truncated " |
1881 | "(%ld/%ld)" , &expr->where, |
1882 | (long) slen, (long) len); |
1883 | |
1884 | /* Apply the standard by 'hand' otherwise it gets cleared for |
1885 | initializers. */ |
1886 | if (check_len != -1 && slen != check_len |
1887 | && !(gfc_option.allow_std & GFC_STD_GNU)) |
1888 | gfc_error_now ("The CHARACTER elements of the array constructor " |
1889 | "at %L must have the same length (%ld/%ld)" , |
1890 | &expr->where, (long) slen, |
1891 | (long) check_len); |
1892 | |
1893 | s[len] = '\0'; |
1894 | free (ptr: expr->value.character.string); |
1895 | expr->value.character.string = s; |
1896 | expr->value.character.length = len; |
1897 | /* If explicit representation was given, clear it |
1898 | as it is no longer needed after padding. */ |
1899 | if (expr->representation.length) |
1900 | { |
1901 | expr->representation.length = 0; |
1902 | free (ptr: expr->representation.string); |
1903 | expr->representation.string = NULL; |
1904 | } |
1905 | } |
1906 | } |
1907 | |
1908 | |
1909 | /* Function to create and update the enumerator history |
1910 | using the information passed as arguments. |
1911 | Pointer "max_enum" is also updated, to point to |
1912 | enum history node containing largest initializer. |
1913 | |
1914 | SYM points to the symbol node of enumerator. |
1915 | INIT points to its enumerator value. */ |
1916 | |
1917 | static void |
1918 | create_enum_history (gfc_symbol *sym, gfc_expr *init) |
1919 | { |
1920 | enumerator_history *new_enum_history; |
1921 | gcc_assert (sym != NULL && init != NULL); |
1922 | |
1923 | new_enum_history = XCNEW (enumerator_history); |
1924 | |
1925 | new_enum_history->sym = sym; |
1926 | new_enum_history->initializer = init; |
1927 | new_enum_history->next = NULL; |
1928 | |
1929 | if (enum_history == NULL) |
1930 | { |
1931 | enum_history = new_enum_history; |
1932 | max_enum = enum_history; |
1933 | } |
1934 | else |
1935 | { |
1936 | new_enum_history->next = enum_history; |
1937 | enum_history = new_enum_history; |
1938 | |
1939 | if (mpz_cmp (max_enum->initializer->value.integer, |
1940 | new_enum_history->initializer->value.integer) < 0) |
1941 | max_enum = new_enum_history; |
1942 | } |
1943 | } |
1944 | |
1945 | |
1946 | /* Function to free enum kind history. */ |
1947 | |
1948 | void |
1949 | gfc_free_enum_history (void) |
1950 | { |
1951 | enumerator_history *current = enum_history; |
1952 | enumerator_history *next; |
1953 | |
1954 | while (current != NULL) |
1955 | { |
1956 | next = current->next; |
1957 | free (ptr: current); |
1958 | current = next; |
1959 | } |
1960 | max_enum = NULL; |
1961 | enum_history = NULL; |
1962 | } |
1963 | |
1964 | |
1965 | /* Function to fix initializer character length if the length of the |
1966 | symbol or component is constant. */ |
1967 | |
1968 | static bool |
1969 | fix_initializer_charlen (gfc_typespec *ts, gfc_expr *init) |
1970 | { |
1971 | if (!gfc_specification_expr (ts->u.cl->length)) |
1972 | return false; |
1973 | |
1974 | int k = gfc_validate_kind (BT_INTEGER, gfc_charlen_int_kind, false); |
1975 | |
1976 | /* resolve_charlen will complain later on if the length |
1977 | is too large. Just skip the initialization in that case. */ |
1978 | if (mpz_cmp (ts->u.cl->length->value.integer, |
1979 | gfc_integer_kinds[k].huge) <= 0) |
1980 | { |
1981 | HOST_WIDE_INT len |
1982 | = gfc_mpz_get_hwi (ts->u.cl->length->value.integer); |
1983 | |
1984 | if (init->expr_type == EXPR_CONSTANT) |
1985 | gfc_set_constant_character_len (len, expr: init, check_len: -1); |
1986 | else if (init->expr_type == EXPR_ARRAY) |
1987 | { |
1988 | gfc_constructor *cons; |
1989 | |
1990 | /* Build a new charlen to prevent simplification from |
1991 | deleting the length before it is resolved. */ |
1992 | init->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
1993 | init->ts.u.cl->length = gfc_copy_expr (ts->u.cl->length); |
1994 | cons = gfc_constructor_first (base: init->value.constructor); |
1995 | for (; cons; cons = gfc_constructor_next (ctor: cons)) |
1996 | gfc_set_constant_character_len (len, expr: cons->expr, check_len: -1); |
1997 | } |
1998 | } |
1999 | |
2000 | return true; |
2001 | } |
2002 | |
2003 | |
2004 | /* Function called by variable_decl() that adds an initialization |
2005 | expression to a symbol. */ |
2006 | |
2007 | static bool |
2008 | add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus) |
2009 | { |
2010 | symbol_attribute attr; |
2011 | gfc_symbol *sym; |
2012 | gfc_expr *init; |
2013 | |
2014 | init = *initp; |
2015 | if (find_special (name, result: &sym, allow_subroutine: false)) |
2016 | return false; |
2017 | |
2018 | attr = sym->attr; |
2019 | |
2020 | /* If this symbol is confirming an implicit parameter type, |
2021 | then an initialization expression is not allowed. */ |
2022 | if (attr.flavor == FL_PARAMETER && sym->value != NULL) |
2023 | { |
2024 | if (*initp != NULL) |
2025 | { |
2026 | gfc_error ("Initializer not allowed for PARAMETER %qs at %C" , |
2027 | sym->name); |
2028 | return false; |
2029 | } |
2030 | else |
2031 | return true; |
2032 | } |
2033 | |
2034 | if (init == NULL) |
2035 | { |
2036 | /* An initializer is required for PARAMETER declarations. */ |
2037 | if (attr.flavor == FL_PARAMETER) |
2038 | { |
2039 | gfc_error ("PARAMETER at %L is missing an initializer" , var_locus); |
2040 | return false; |
2041 | } |
2042 | } |
2043 | else |
2044 | { |
2045 | /* If a variable appears in a DATA block, it cannot have an |
2046 | initializer. */ |
2047 | if (sym->attr.data) |
2048 | { |
2049 | gfc_error ("Variable %qs at %C with an initializer already " |
2050 | "appears in a DATA statement" , sym->name); |
2051 | return false; |
2052 | } |
2053 | |
2054 | /* Check if the assignment can happen. This has to be put off |
2055 | until later for derived type variables and procedure pointers. */ |
2056 | if (!gfc_bt_struct (sym->ts.type) && !gfc_bt_struct (init->ts.type) |
2057 | && sym->ts.type != BT_CLASS && init->ts.type != BT_CLASS |
2058 | && !sym->attr.proc_pointer |
2059 | && !gfc_check_assign_symbol (sym, NULL, init)) |
2060 | return false; |
2061 | |
2062 | if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl |
2063 | && init->ts.type == BT_CHARACTER) |
2064 | { |
2065 | /* Update symbol character length according initializer. */ |
2066 | if (!gfc_check_assign_symbol (sym, NULL, init)) |
2067 | return false; |
2068 | |
2069 | if (sym->ts.u.cl->length == NULL) |
2070 | { |
2071 | gfc_charlen_t clen; |
2072 | /* If there are multiple CHARACTER variables declared on the |
2073 | same line, we don't want them to share the same length. */ |
2074 | sym->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
2075 | |
2076 | if (sym->attr.flavor == FL_PARAMETER) |
2077 | { |
2078 | if (init->expr_type == EXPR_CONSTANT) |
2079 | { |
2080 | clen = init->value.character.length; |
2081 | sym->ts.u.cl->length |
2082 | = gfc_get_int_expr (gfc_charlen_int_kind, |
2083 | NULL, clen); |
2084 | } |
2085 | else if (init->expr_type == EXPR_ARRAY) |
2086 | { |
2087 | if (init->ts.u.cl && init->ts.u.cl->length) |
2088 | { |
2089 | const gfc_expr *length = init->ts.u.cl->length; |
2090 | if (length->expr_type != EXPR_CONSTANT) |
2091 | { |
2092 | gfc_error ("Cannot initialize parameter array " |
2093 | "at %L " |
2094 | "with variable length elements" , |
2095 | &sym->declared_at); |
2096 | return false; |
2097 | } |
2098 | clen = mpz_get_si (length->value.integer); |
2099 | } |
2100 | else if (init->value.constructor) |
2101 | { |
2102 | gfc_constructor *c; |
2103 | c = gfc_constructor_first (base: init->value.constructor); |
2104 | clen = c->expr->value.character.length; |
2105 | } |
2106 | else |
2107 | gcc_unreachable (); |
2108 | sym->ts.u.cl->length |
2109 | = gfc_get_int_expr (gfc_charlen_int_kind, |
2110 | NULL, clen); |
2111 | } |
2112 | else if (init->ts.u.cl && init->ts.u.cl->length) |
2113 | sym->ts.u.cl->length = |
2114 | gfc_copy_expr (init->ts.u.cl->length); |
2115 | } |
2116 | } |
2117 | /* Update initializer character length according to symbol. */ |
2118 | else if (sym->ts.u.cl->length->expr_type == EXPR_CONSTANT |
2119 | && !fix_initializer_charlen (ts: &sym->ts, init)) |
2120 | return false; |
2121 | } |
2122 | |
2123 | if (sym->attr.flavor == FL_PARAMETER && sym->attr.dimension && sym->as |
2124 | && sym->as->rank && init->rank && init->rank != sym->as->rank) |
2125 | { |
2126 | gfc_error ("Rank mismatch of array at %L and its initializer " |
2127 | "(%d/%d)" , &sym->declared_at, sym->as->rank, init->rank); |
2128 | return false; |
2129 | } |
2130 | |
2131 | /* If sym is implied-shape, set its upper bounds from init. */ |
2132 | if (sym->attr.flavor == FL_PARAMETER && sym->attr.dimension |
2133 | && sym->as->type == AS_IMPLIED_SHAPE) |
2134 | { |
2135 | int dim; |
2136 | |
2137 | if (init->rank == 0) |
2138 | { |
2139 | gfc_error ("Cannot initialize implied-shape array at %L" |
2140 | " with scalar" , &sym->declared_at); |
2141 | return false; |
2142 | } |
2143 | |
2144 | /* The shape may be NULL for EXPR_ARRAY, set it. */ |
2145 | if (init->shape == NULL) |
2146 | { |
2147 | if (init->expr_type != EXPR_ARRAY) |
2148 | { |
2149 | gfc_error ("Bad shape of initializer at %L" , &init->where); |
2150 | return false; |
2151 | } |
2152 | |
2153 | init->shape = gfc_get_shape (1); |
2154 | if (!gfc_array_size (init, &init->shape[0])) |
2155 | { |
2156 | gfc_error ("Cannot determine shape of initializer at %L" , |
2157 | &init->where); |
2158 | free (ptr: init->shape); |
2159 | init->shape = NULL; |
2160 | return false; |
2161 | } |
2162 | } |
2163 | |
2164 | for (dim = 0; dim < sym->as->rank; ++dim) |
2165 | { |
2166 | int k; |
2167 | gfc_expr *e, *lower; |
2168 | |
2169 | lower = sym->as->lower[dim]; |
2170 | |
2171 | /* If the lower bound is an array element from another |
2172 | parameterized array, then it is marked with EXPR_VARIABLE and |
2173 | is an initialization expression. Try to reduce it. */ |
2174 | if (lower->expr_type == EXPR_VARIABLE) |
2175 | gfc_reduce_init_expr (expr: lower); |
2176 | |
2177 | if (lower->expr_type == EXPR_CONSTANT) |
2178 | { |
2179 | /* All dimensions must be without upper bound. */ |
2180 | gcc_assert (!sym->as->upper[dim]); |
2181 | |
2182 | k = lower->ts.kind; |
2183 | e = gfc_get_constant_expr (BT_INTEGER, k, &sym->declared_at); |
2184 | mpz_add (e->value.integer, lower->value.integer, |
2185 | init->shape[dim]); |
2186 | mpz_sub_ui (e->value.integer, e->value.integer, 1); |
2187 | sym->as->upper[dim] = e; |
2188 | } |
2189 | else |
2190 | { |
2191 | gfc_error ("Non-constant lower bound in implied-shape" |
2192 | " declaration at %L" , &lower->where); |
2193 | return false; |
2194 | } |
2195 | } |
2196 | |
2197 | sym->as->type = AS_EXPLICIT; |
2198 | } |
2199 | |
2200 | /* Ensure that explicit bounds are simplified. */ |
2201 | if (sym->attr.flavor == FL_PARAMETER && sym->attr.dimension |
2202 | && sym->as->type == AS_EXPLICIT) |
2203 | { |
2204 | for (int dim = 0; dim < sym->as->rank; ++dim) |
2205 | { |
2206 | gfc_expr *e; |
2207 | |
2208 | e = sym->as->lower[dim]; |
2209 | if (e->expr_type != EXPR_CONSTANT) |
2210 | gfc_reduce_init_expr (expr: e); |
2211 | |
2212 | e = sym->as->upper[dim]; |
2213 | if (e->expr_type != EXPR_CONSTANT) |
2214 | gfc_reduce_init_expr (expr: e); |
2215 | } |
2216 | } |
2217 | |
2218 | /* Need to check if the expression we initialized this |
2219 | to was one of the iso_c_binding named constants. If so, |
2220 | and we're a parameter (constant), let it be iso_c. |
2221 | For example: |
2222 | integer(c_int), parameter :: my_int = c_int |
2223 | integer(my_int) :: my_int_2 |
2224 | If we mark my_int as iso_c (since we can see it's value |
2225 | is equal to one of the named constants), then my_int_2 |
2226 | will be considered C interoperable. */ |
2227 | if (sym->ts.type != BT_CHARACTER && !gfc_bt_struct (sym->ts.type)) |
2228 | { |
2229 | sym->ts.is_iso_c |= init->ts.is_iso_c; |
2230 | sym->ts.is_c_interop |= init->ts.is_c_interop; |
2231 | /* attr bits needed for module files. */ |
2232 | sym->attr.is_iso_c |= init->ts.is_iso_c; |
2233 | sym->attr.is_c_interop |= init->ts.is_c_interop; |
2234 | if (init->ts.is_iso_c) |
2235 | sym->ts.f90_type = init->ts.f90_type; |
2236 | } |
2237 | |
2238 | /* Catch the case: type(t), parameter :: x = z'1'. */ |
2239 | if (sym->ts.type == BT_DERIVED && init->ts.type == BT_BOZ) |
2240 | { |
2241 | gfc_error ("Entity %qs at %L is incompatible with a BOZ " |
2242 | "literal constant" , name, &sym->declared_at); |
2243 | return false; |
2244 | } |
2245 | |
2246 | /* Add initializer. Make sure we keep the ranks sane. */ |
2247 | if (sym->attr.dimension && init->rank == 0) |
2248 | { |
2249 | mpz_t size; |
2250 | gfc_expr *array; |
2251 | int n; |
2252 | if (sym->attr.flavor == FL_PARAMETER |
2253 | && gfc_is_constant_expr (init) |
2254 | && (init->expr_type == EXPR_CONSTANT |
2255 | || init->expr_type == EXPR_STRUCTURE) |
2256 | && spec_size (sym->as, &size)) |
2257 | { |
2258 | array = gfc_get_array_expr (type: init->ts.type, kind: init->ts.kind, |
2259 | &init->where); |
2260 | if (init->ts.type == BT_DERIVED) |
2261 | array->ts.u.derived = init->ts.u.derived; |
2262 | for (n = 0; n < (int)mpz_get_si (size); n++) |
2263 | gfc_constructor_append_expr (base: &array->value.constructor, |
2264 | e: n == 0 |
2265 | ? init |
2266 | : gfc_copy_expr (init), |
2267 | where: &init->where); |
2268 | |
2269 | array->shape = gfc_get_shape (sym->as->rank); |
2270 | for (n = 0; n < sym->as->rank; n++) |
2271 | spec_dimen_size (sym->as, n, &array->shape[n]); |
2272 | |
2273 | init = array; |
2274 | mpz_clear (size); |
2275 | } |
2276 | init->rank = sym->as->rank; |
2277 | } |
2278 | |
2279 | sym->value = init; |
2280 | if (sym->attr.save == SAVE_NONE) |
2281 | sym->attr.save = SAVE_IMPLICIT; |
2282 | *initp = NULL; |
2283 | } |
2284 | |
2285 | return true; |
2286 | } |
2287 | |
2288 | |
2289 | /* Function called by variable_decl() that adds a name to a structure |
2290 | being built. */ |
2291 | |
2292 | static bool |
2293 | build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, |
2294 | gfc_array_spec **as) |
2295 | { |
2296 | gfc_state_data *s; |
2297 | gfc_component *c; |
2298 | |
2299 | /* F03:C438/C439. If the current symbol is of the same derived type that we're |
2300 | constructing, it must have the pointer attribute. */ |
2301 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
2302 | && current_ts.u.derived == gfc_current_block () |
2303 | && current_attr.pointer == 0) |
2304 | { |
2305 | if (current_attr.allocatable |
2306 | && !gfc_notify_std(GFC_STD_F2008, "Component at %C " |
2307 | "must have the POINTER attribute" )) |
2308 | { |
2309 | return false; |
2310 | } |
2311 | else if (current_attr.allocatable == 0) |
2312 | { |
2313 | gfc_error ("Component at %C must have the POINTER attribute" ); |
2314 | return false; |
2315 | } |
2316 | } |
2317 | |
2318 | /* F03:C437. */ |
2319 | if (current_ts.type == BT_CLASS |
2320 | && !(current_attr.pointer || current_attr.allocatable)) |
2321 | { |
2322 | gfc_error ("Component %qs with CLASS at %C must be allocatable " |
2323 | "or pointer" , name); |
2324 | return false; |
2325 | } |
2326 | |
2327 | if (gfc_current_block ()->attr.pointer && (*as)->rank != 0) |
2328 | { |
2329 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) |
2330 | { |
2331 | gfc_error ("Array component of structure at %C must have explicit " |
2332 | "or deferred shape" ); |
2333 | return false; |
2334 | } |
2335 | } |
2336 | |
2337 | /* If we are in a nested union/map definition, gfc_add_component will not |
2338 | properly find repeated components because: |
2339 | (i) gfc_add_component does a flat search, where components of unions |
2340 | and maps are implicity chained so nested components may conflict. |
2341 | (ii) Unions and maps are not linked as components of their parent |
2342 | structures until after they are parsed. |
2343 | For (i) we use gfc_find_component which searches recursively, and for (ii) |
2344 | we search each block directly from the parse stack until we find the top |
2345 | level structure. */ |
2346 | |
2347 | s = gfc_state_stack; |
2348 | if (s->state == COMP_UNION || s->state == COMP_MAP) |
2349 | { |
2350 | while (s->state == COMP_UNION || gfc_comp_struct (s->state)) |
2351 | { |
2352 | c = gfc_find_component (s->sym, name, true, true, NULL); |
2353 | if (c != NULL) |
2354 | { |
2355 | gfc_error_now ("Component %qs at %C already declared at %L" , |
2356 | name, &c->loc); |
2357 | return false; |
2358 | } |
2359 | /* Break after we've searched the entire chain. */ |
2360 | if (s->state == COMP_DERIVED || s->state == COMP_STRUCTURE) |
2361 | break; |
2362 | s = s->previous; |
2363 | } |
2364 | } |
2365 | |
2366 | if (!gfc_add_component (gfc_current_block(), name, &c)) |
2367 | return false; |
2368 | |
2369 | c->ts = current_ts; |
2370 | if (c->ts.type == BT_CHARACTER) |
2371 | c->ts.u.cl = cl; |
2372 | |
2373 | if (c->ts.type != BT_CLASS && c->ts.type != BT_DERIVED |
2374 | && (c->ts.kind == 0 || c->ts.type == BT_CHARACTER) |
2375 | && saved_kind_expr != NULL) |
2376 | c->kind_expr = gfc_copy_expr (saved_kind_expr); |
2377 | |
2378 | c->attr = current_attr; |
2379 | |
2380 | c->initializer = *init; |
2381 | *init = NULL; |
2382 | |
2383 | /* Update initializer character length according to component. */ |
2384 | if (c->ts.type == BT_CHARACTER && c->ts.u.cl->length |
2385 | && c->ts.u.cl->length->expr_type == EXPR_CONSTANT |
2386 | && c->initializer && c->initializer->ts.type == BT_CHARACTER |
2387 | && !fix_initializer_charlen (ts: &c->ts, init: c->initializer)) |
2388 | return false; |
2389 | |
2390 | c->as = *as; |
2391 | if (c->as != NULL) |
2392 | { |
2393 | if (c->as->corank) |
2394 | c->attr.codimension = 1; |
2395 | if (c->as->rank) |
2396 | c->attr.dimension = 1; |
2397 | } |
2398 | *as = NULL; |
2399 | |
2400 | gfc_apply_init (&c->ts, &c->attr, c->initializer); |
2401 | |
2402 | /* Check array components. */ |
2403 | if (!c->attr.dimension) |
2404 | goto scalar; |
2405 | |
2406 | if (c->attr.pointer) |
2407 | { |
2408 | if (c->as->type != AS_DEFERRED) |
2409 | { |
2410 | gfc_error ("Pointer array component of structure at %C must have a " |
2411 | "deferred shape" ); |
2412 | return false; |
2413 | } |
2414 | } |
2415 | else if (c->attr.allocatable) |
2416 | { |
2417 | if (c->as->type != AS_DEFERRED) |
2418 | { |
2419 | gfc_error ("Allocatable component of structure at %C must have a " |
2420 | "deferred shape" ); |
2421 | return false; |
2422 | } |
2423 | } |
2424 | else |
2425 | { |
2426 | if (c->as->type != AS_EXPLICIT) |
2427 | { |
2428 | gfc_error ("Array component of structure at %C must have an " |
2429 | "explicit shape" ); |
2430 | return false; |
2431 | } |
2432 | } |
2433 | |
2434 | scalar: |
2435 | if (c->ts.type == BT_CLASS) |
2436 | return gfc_build_class_symbol (&c->ts, &c->attr, &c->as); |
2437 | |
2438 | if (c->attr.pdt_kind || c->attr.pdt_len) |
2439 | { |
2440 | gfc_symbol *sym; |
2441 | gfc_find_symbol (c->name, gfc_current_block ()->f2k_derived, |
2442 | 0, &sym); |
2443 | if (sym == NULL) |
2444 | { |
2445 | gfc_error ("Type parameter %qs at %C has no corresponding entry " |
2446 | "in the type parameter name list at %L" , |
2447 | c->name, &gfc_current_block ()->declared_at); |
2448 | return false; |
2449 | } |
2450 | sym->ts = c->ts; |
2451 | sym->attr.pdt_kind = c->attr.pdt_kind; |
2452 | sym->attr.pdt_len = c->attr.pdt_len; |
2453 | if (c->initializer) |
2454 | sym->value = gfc_copy_expr (c->initializer); |
2455 | sym->attr.flavor = FL_VARIABLE; |
2456 | } |
2457 | |
2458 | if ((c->ts.type == BT_DERIVED || c->ts.type == BT_CLASS) |
2459 | && c->ts.u.derived && c->ts.u.derived->attr.pdt_template |
2460 | && decl_type_param_list) |
2461 | c->param_list = gfc_copy_actual_arglist (decl_type_param_list); |
2462 | |
2463 | return true; |
2464 | } |
2465 | |
2466 | |
2467 | /* Match a 'NULL()', and possibly take care of some side effects. */ |
2468 | |
2469 | match |
2470 | gfc_match_null (gfc_expr **result) |
2471 | { |
2472 | gfc_symbol *sym; |
2473 | match m, m2 = MATCH_NO; |
2474 | |
2475 | if ((m = gfc_match (" null ( )" )) == MATCH_ERROR) |
2476 | return MATCH_ERROR; |
2477 | |
2478 | if (m == MATCH_NO) |
2479 | { |
2480 | locus old_loc; |
2481 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
2482 | |
2483 | if ((m2 = gfc_match (" null (" )) != MATCH_YES) |
2484 | return m2; |
2485 | |
2486 | old_loc = gfc_current_locus; |
2487 | if ((m2 = gfc_match (" %n ) " , name)) == MATCH_ERROR) |
2488 | return MATCH_ERROR; |
2489 | if (m2 != MATCH_YES |
2490 | && ((m2 = gfc_match (" mold = %n )" , name)) == MATCH_ERROR)) |
2491 | return MATCH_ERROR; |
2492 | if (m2 == MATCH_NO) |
2493 | { |
2494 | gfc_current_locus = old_loc; |
2495 | return MATCH_NO; |
2496 | } |
2497 | } |
2498 | |
2499 | /* The NULL symbol now has to be/become an intrinsic function. */ |
2500 | if (gfc_get_symbol ("null" , NULL, &sym)) |
2501 | { |
2502 | gfc_error ("NULL() initialization at %C is ambiguous" ); |
2503 | return MATCH_ERROR; |
2504 | } |
2505 | |
2506 | gfc_intrinsic_symbol (sym); |
2507 | |
2508 | if (sym->attr.proc != PROC_INTRINSIC |
2509 | && !(sym->attr.use_assoc && sym->attr.intrinsic) |
2510 | && (!gfc_add_procedure(&sym->attr, PROC_INTRINSIC, sym->name, NULL) |
2511 | || !gfc_add_function (&sym->attr, sym->name, NULL))) |
2512 | return MATCH_ERROR; |
2513 | |
2514 | *result = gfc_get_null_expr (&gfc_current_locus); |
2515 | |
2516 | /* Invalid per F2008, C512. */ |
2517 | if (m2 == MATCH_YES) |
2518 | { |
2519 | gfc_error ("NULL() initialization at %C may not have MOLD" ); |
2520 | return MATCH_ERROR; |
2521 | } |
2522 | |
2523 | return MATCH_YES; |
2524 | } |
2525 | |
2526 | |
2527 | /* Match the initialization expr for a data pointer or procedure pointer. */ |
2528 | |
2529 | static match |
2530 | match_pointer_init (gfc_expr **init, int procptr) |
2531 | { |
2532 | match m; |
2533 | |
2534 | if (gfc_pure (NULL) && !gfc_comp_struct (gfc_state_stack->state)) |
2535 | { |
2536 | gfc_error ("Initialization of pointer at %C is not allowed in " |
2537 | "a PURE procedure" ); |
2538 | return MATCH_ERROR; |
2539 | } |
2540 | gfc_unset_implicit_pure (gfc_current_ns->proc_name); |
2541 | |
2542 | /* Match NULL() initialization. */ |
2543 | m = gfc_match_null (result: init); |
2544 | if (m != MATCH_NO) |
2545 | return m; |
2546 | |
2547 | /* Match non-NULL initialization. */ |
2548 | gfc_matching_ptr_assignment = !procptr; |
2549 | gfc_matching_procptr_assignment = procptr; |
2550 | m = gfc_match_rvalue (init); |
2551 | gfc_matching_ptr_assignment = 0; |
2552 | gfc_matching_procptr_assignment = 0; |
2553 | if (m == MATCH_ERROR) |
2554 | return MATCH_ERROR; |
2555 | else if (m == MATCH_NO) |
2556 | { |
2557 | gfc_error ("Error in pointer initialization at %C" ); |
2558 | return MATCH_ERROR; |
2559 | } |
2560 | |
2561 | if (!procptr && !gfc_resolve_expr (*init)) |
2562 | return MATCH_ERROR; |
2563 | |
2564 | if (!gfc_notify_std (GFC_STD_F2008, "non-NULL pointer " |
2565 | "initialization at %C" )) |
2566 | return MATCH_ERROR; |
2567 | |
2568 | return MATCH_YES; |
2569 | } |
2570 | |
2571 | |
2572 | static bool |
2573 | check_function_name (char *name) |
2574 | { |
2575 | /* In functions that have a RESULT variable defined, the function name always |
2576 | refers to function calls. Therefore, the name is not allowed to appear in |
2577 | specification statements. When checking this, be careful about |
2578 | 'hidden' procedure pointer results ('ppr@'). */ |
2579 | |
2580 | if (gfc_current_state () == COMP_FUNCTION) |
2581 | { |
2582 | gfc_symbol *block = gfc_current_block (); |
2583 | if (block && block->result && block->result != block |
2584 | && strcmp (s1: block->result->name, s2: "ppr@" ) != 0 |
2585 | && strcmp (s1: block->name, s2: name) == 0) |
2586 | { |
2587 | gfc_error ("RESULT variable %qs at %L prohibits FUNCTION name %qs at %C " |
2588 | "from appearing in a specification statement" , |
2589 | block->result->name, &block->result->declared_at, name); |
2590 | return false; |
2591 | } |
2592 | } |
2593 | |
2594 | return true; |
2595 | } |
2596 | |
2597 | |
2598 | /* Match a variable name with an optional initializer. When this |
2599 | subroutine is called, a variable is expected to be parsed next. |
2600 | Depending on what is happening at the moment, updates either the |
2601 | symbol table or the current interface. */ |
2602 | |
2603 | static match |
2604 | variable_decl (int elem) |
2605 | { |
2606 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
2607 | static unsigned int fill_id = 0; |
2608 | gfc_expr *initializer, *char_len; |
2609 | gfc_array_spec *as; |
2610 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
2611 | gfc_charlen *cl; |
2612 | bool cl_deferred; |
2613 | locus var_locus; |
2614 | match m; |
2615 | bool t; |
2616 | gfc_symbol *sym; |
2617 | char c; |
2618 | |
2619 | initializer = NULL; |
2620 | as = NULL; |
2621 | cp_as = NULL; |
2622 | |
2623 | /* When we get here, we've just matched a list of attributes and |
2624 | maybe a type and a double colon. The next thing we expect to see |
2625 | is the name of the symbol. */ |
2626 | |
2627 | /* If we are parsing a structure with legacy support, we allow the symbol |
2628 | name to be '%FILL' which gives it an anonymous (inaccessible) name. */ |
2629 | m = MATCH_NO; |
2630 | gfc_gobble_whitespace (); |
2631 | c = gfc_peek_ascii_char (); |
2632 | if (c == '%') |
2633 | { |
2634 | gfc_next_ascii_char (); /* Burn % character. */ |
2635 | m = gfc_match ("fill" ); |
2636 | if (m == MATCH_YES) |
2637 | { |
2638 | if (gfc_current_state () != COMP_STRUCTURE) |
2639 | { |
2640 | if (flag_dec_structure) |
2641 | gfc_error ("%qs not allowed outside STRUCTURE at %C" , "%FILL" ); |
2642 | else |
2643 | gfc_error ("%qs at %C is a DEC extension, enable with " |
2644 | "%<-fdec-structure%>" , "%FILL" ); |
2645 | m = MATCH_ERROR; |
2646 | goto cleanup; |
2647 | } |
2648 | |
2649 | if (attr_seen) |
2650 | { |
2651 | gfc_error ("%qs entity cannot have attributes at %C" , "%FILL" ); |
2652 | m = MATCH_ERROR; |
2653 | goto cleanup; |
2654 | } |
2655 | |
2656 | /* %FILL components are given invalid fortran names. */ |
2657 | snprintf (s: name, GFC_MAX_SYMBOL_LEN + 1, format: "%%FILL%u" , fill_id++); |
2658 | } |
2659 | else |
2660 | { |
2661 | gfc_error ("Invalid character %qc in variable name at %C" , c); |
2662 | return MATCH_ERROR; |
2663 | } |
2664 | } |
2665 | else |
2666 | { |
2667 | m = gfc_match_name (name); |
2668 | if (m != MATCH_YES) |
2669 | goto cleanup; |
2670 | } |
2671 | |
2672 | var_locus = gfc_current_locus; |
2673 | |
2674 | /* Now we could see the optional array spec. or character length. */ |
2675 | m = gfc_match_array_spec (&as, true, true); |
2676 | if (m == MATCH_ERROR) |
2677 | goto cleanup; |
2678 | |
2679 | if (m == MATCH_NO) |
2680 | as = gfc_copy_array_spec (current_as); |
2681 | else if (current_as |
2682 | && !merge_array_spec (from: current_as, to: as, copy: true)) |
2683 | { |
2684 | m = MATCH_ERROR; |
2685 | goto cleanup; |
2686 | } |
2687 | |
2688 | if (flag_cray_pointer) |
2689 | cp_as = gfc_copy_array_spec (as); |
2690 | |
2691 | /* At this point, we know for sure if the symbol is PARAMETER and can thus |
2692 | determine (and check) whether it can be implied-shape. If it |
2693 | was parsed as assumed-size, change it because PARAMETERs cannot |
2694 | be assumed-size. |
2695 | |
2696 | An explicit-shape-array cannot appear under several conditions. |
2697 | That check is done here as well. */ |
2698 | if (as) |
2699 | { |
2700 | if (as->type == AS_IMPLIED_SHAPE && current_attr.flavor != FL_PARAMETER) |
2701 | { |
2702 | m = MATCH_ERROR; |
2703 | gfc_error ("Non-PARAMETER symbol %qs at %L cannot be implied-shape" , |
2704 | name, &var_locus); |
2705 | goto cleanup; |
2706 | } |
2707 | |
2708 | if (as->type == AS_ASSUMED_SIZE && as->rank == 1 |
2709 | && current_attr.flavor == FL_PARAMETER) |
2710 | as->type = AS_IMPLIED_SHAPE; |
2711 | |
2712 | if (as->type == AS_IMPLIED_SHAPE |
2713 | && !gfc_notify_std (GFC_STD_F2008, "Implied-shape array at %L" , |
2714 | &var_locus)) |
2715 | { |
2716 | m = MATCH_ERROR; |
2717 | goto cleanup; |
2718 | } |
2719 | |
2720 | gfc_seen_div0 = false; |
2721 | |
2722 | /* F2018:C830 (R816) An explicit-shape-spec whose bounds are not |
2723 | constant expressions shall appear only in a subprogram, derived |
2724 | type definition, BLOCK construct, or interface body. */ |
2725 | if (as->type == AS_EXPLICIT |
2726 | && gfc_current_state () != COMP_BLOCK |
2727 | && gfc_current_state () != COMP_DERIVED |
2728 | && gfc_current_state () != COMP_FUNCTION |
2729 | && gfc_current_state () != COMP_INTERFACE |
2730 | && gfc_current_state () != COMP_SUBROUTINE) |
2731 | { |
2732 | gfc_expr *e; |
2733 | bool not_constant = false; |
2734 | |
2735 | for (int i = 0; i < as->rank; i++) |
2736 | { |
2737 | e = gfc_copy_expr (as->lower[i]); |
2738 | if (!gfc_resolve_expr (e) && gfc_seen_div0) |
2739 | { |
2740 | m = MATCH_ERROR; |
2741 | goto cleanup; |
2742 | } |
2743 | |
2744 | gfc_simplify_expr (e, 0); |
2745 | if (e && (e->expr_type != EXPR_CONSTANT)) |
2746 | { |
2747 | not_constant = true; |
2748 | break; |
2749 | } |
2750 | gfc_free_expr (e); |
2751 | |
2752 | e = gfc_copy_expr (as->upper[i]); |
2753 | if (!gfc_resolve_expr (e) && gfc_seen_div0) |
2754 | { |
2755 | m = MATCH_ERROR; |
2756 | goto cleanup; |
2757 | } |
2758 | |
2759 | gfc_simplify_expr (e, 0); |
2760 | if (e && (e->expr_type != EXPR_CONSTANT)) |
2761 | { |
2762 | not_constant = true; |
2763 | break; |
2764 | } |
2765 | gfc_free_expr (e); |
2766 | } |
2767 | |
2768 | if (not_constant && e->ts.type != BT_INTEGER) |
2769 | { |
2770 | gfc_error ("Explicit array shape at %C must be constant of " |
2771 | "INTEGER type and not %s type" , |
2772 | gfc_basic_typename (e->ts.type)); |
2773 | m = MATCH_ERROR; |
2774 | goto cleanup; |
2775 | } |
2776 | if (not_constant) |
2777 | { |
2778 | gfc_error ("Explicit shaped array with nonconstant bounds at %C" ); |
2779 | m = MATCH_ERROR; |
2780 | goto cleanup; |
2781 | } |
2782 | } |
2783 | if (as->type == AS_EXPLICIT) |
2784 | { |
2785 | for (int i = 0; i < as->rank; i++) |
2786 | { |
2787 | gfc_expr *e, *n; |
2788 | e = as->lower[i]; |
2789 | if (e->expr_type != EXPR_CONSTANT) |
2790 | { |
2791 | n = gfc_copy_expr (e); |
2792 | if (!gfc_simplify_expr (n, 1) && gfc_seen_div0) |
2793 | { |
2794 | m = MATCH_ERROR; |
2795 | goto cleanup; |
2796 | } |
2797 | |
2798 | if (n->expr_type == EXPR_CONSTANT) |
2799 | gfc_replace_expr (e, n); |
2800 | else |
2801 | gfc_free_expr (n); |
2802 | } |
2803 | e = as->upper[i]; |
2804 | if (e->expr_type != EXPR_CONSTANT) |
2805 | { |
2806 | n = gfc_copy_expr (e); |
2807 | if (!gfc_simplify_expr (n, 1) && gfc_seen_div0) |
2808 | { |
2809 | m = MATCH_ERROR; |
2810 | goto cleanup; |
2811 | } |
2812 | |
2813 | if (n->expr_type == EXPR_CONSTANT) |
2814 | gfc_replace_expr (e, n); |
2815 | else |
2816 | gfc_free_expr (n); |
2817 | } |
2818 | /* For an explicit-shape spec with constant bounds, ensure |
2819 | that the effective upper bound is not lower than the |
2820 | respective lower bound minus one. Otherwise adjust it so |
2821 | that the extent is trivially derived to be zero. */ |
2822 | if (as->lower[i]->expr_type == EXPR_CONSTANT |
2823 | && as->upper[i]->expr_type == EXPR_CONSTANT |
2824 | && as->lower[i]->ts.type == BT_INTEGER |
2825 | && as->upper[i]->ts.type == BT_INTEGER |
2826 | && mpz_cmp (as->upper[i]->value.integer, |
2827 | as->lower[i]->value.integer) < 0) |
2828 | mpz_sub_ui (as->upper[i]->value.integer, |
2829 | as->lower[i]->value.integer, 1); |
2830 | } |
2831 | } |
2832 | } |
2833 | |
2834 | char_len = NULL; |
2835 | cl = NULL; |
2836 | cl_deferred = false; |
2837 | |
2838 | if (current_ts.type == BT_CHARACTER) |
2839 | { |
2840 | switch (match_char_length (expr: &char_len, deferred: &cl_deferred, obsolescent_check: false)) |
2841 | { |
2842 | case MATCH_YES: |
2843 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
2844 | |
2845 | cl->length = char_len; |
2846 | break; |
2847 | |
2848 | /* Non-constant lengths need to be copied after the first |
2849 | element. Also copy assumed lengths. */ |
2850 | case MATCH_NO: |
2851 | if (elem > 1 |
2852 | && (current_ts.u.cl->length == NULL |
2853 | || current_ts.u.cl->length->expr_type != EXPR_CONSTANT)) |
2854 | { |
2855 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
2856 | cl->length = gfc_copy_expr (current_ts.u.cl->length); |
2857 | } |
2858 | else |
2859 | cl = current_ts.u.cl; |
2860 | |
2861 | cl_deferred = current_ts.deferred; |
2862 | |
2863 | break; |
2864 | |
2865 | case MATCH_ERROR: |
2866 | goto cleanup; |
2867 | } |
2868 | } |
2869 | |
2870 | /* The dummy arguments and result of the abbreviated form of MODULE |
2871 | PROCEDUREs, used in SUBMODULES should not be redefined. */ |
2872 | if (gfc_current_ns->proc_name |
2873 | && gfc_current_ns->proc_name->abr_modproc_decl) |
2874 | { |
2875 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); |
2876 | if (sym != NULL && (sym->attr.dummy || sym->attr.result)) |
2877 | { |
2878 | m = MATCH_ERROR; |
2879 | gfc_error ("%qs at %C is a redefinition of the declaration " |
2880 | "in the corresponding interface for MODULE " |
2881 | "PROCEDURE %qs" , sym->name, |
2882 | gfc_current_ns->proc_name->name); |
2883 | goto cleanup; |
2884 | } |
2885 | } |
2886 | |
2887 | /* %FILL components may not have initializers. */ |
2888 | if (startswith (str: name, prefix: "%FILL" ) && gfc_match_eos () != MATCH_YES) |
2889 | { |
2890 | gfc_error ("%qs entity cannot have an initializer at %C" , "%FILL" ); |
2891 | m = MATCH_ERROR; |
2892 | goto cleanup; |
2893 | } |
2894 | |
2895 | /* If this symbol has already shown up in a Cray Pointer declaration, |
2896 | and this is not a component declaration, |
2897 | then we want to set the type & bail out. */ |
2898 | if (flag_cray_pointer && !gfc_comp_struct (gfc_current_state ())) |
2899 | { |
2900 | gfc_find_symbol (name, gfc_current_ns, 0, &sym); |
2901 | if (sym != NULL && sym->attr.cray_pointee) |
2902 | { |
2903 | m = MATCH_YES; |
2904 | if (!gfc_add_type (sym, ¤t_ts, &gfc_current_locus)) |
2905 | { |
2906 | m = MATCH_ERROR; |
2907 | goto cleanup; |
2908 | } |
2909 | |
2910 | /* Check to see if we have an array specification. */ |
2911 | if (cp_as != NULL) |
2912 | { |
2913 | if (sym->as != NULL) |
2914 | { |
2915 | gfc_error ("Duplicate array spec for Cray pointee at %C" ); |
2916 | gfc_free_array_spec (cp_as); |
2917 | m = MATCH_ERROR; |
2918 | goto cleanup; |
2919 | } |
2920 | else |
2921 | { |
2922 | if (!gfc_set_array_spec (sym, cp_as, &var_locus)) |
2923 | gfc_internal_error ("Cannot set pointee array spec." ); |
2924 | |
2925 | /* Fix the array spec. */ |
2926 | m = gfc_mod_pointee_as (sym->as); |
2927 | if (m == MATCH_ERROR) |
2928 | goto cleanup; |
2929 | } |
2930 | } |
2931 | goto cleanup; |
2932 | } |
2933 | else |
2934 | { |
2935 | gfc_free_array_spec (cp_as); |
2936 | } |
2937 | } |
2938 | |
2939 | /* Procedure pointer as function result. */ |
2940 | if (gfc_current_state () == COMP_FUNCTION |
2941 | && strcmp (s1: "ppr@" , gfc_current_block ()->name) == 0 |
2942 | && strcmp (s1: name, gfc_current_block ()->ns->proc_name->name) == 0) |
2943 | strcpy (dest: name, src: "ppr@" ); |
2944 | |
2945 | if (gfc_current_state () == COMP_FUNCTION |
2946 | && strcmp (s1: name, gfc_current_block ()->name) == 0 |
2947 | && gfc_current_block ()->result |
2948 | && strcmp (s1: "ppr@" , gfc_current_block ()->result->name) == 0) |
2949 | strcpy (dest: name, src: "ppr@" ); |
2950 | |
2951 | /* OK, we've successfully matched the declaration. Now put the |
2952 | symbol in the current namespace, because it might be used in the |
2953 | optional initialization expression for this symbol, e.g. this is |
2954 | perfectly legal: |
2955 | |
2956 | integer, parameter :: i = huge(i) |
2957 | |
2958 | This is only true for parameters or variables of a basic type. |
2959 | For components of derived types, it is not true, so we don't |
2960 | create a symbol for those yet. If we fail to create the symbol, |
2961 | bail out. */ |
2962 | if (!gfc_comp_struct (gfc_current_state ()) |
2963 | && !build_sym (name, cl, cl_deferred, as: &as, var_locus: &var_locus)) |
2964 | { |
2965 | m = MATCH_ERROR; |
2966 | goto cleanup; |
2967 | } |
2968 | |
2969 | if (!check_function_name (name)) |
2970 | { |
2971 | m = MATCH_ERROR; |
2972 | goto cleanup; |
2973 | } |
2974 | |
2975 | /* We allow old-style initializations of the form |
2976 | integer i /2/, j(4) /3*3, 1/ |
2977 | (if no colon has been seen). These are different from data |
2978 | statements in that initializers are only allowed to apply to the |
2979 | variable immediately preceding, i.e. |
2980 | integer i, j /1, 2/ |
2981 | is not allowed. Therefore we have to do some work manually, that |
2982 | could otherwise be left to the matchers for DATA statements. */ |
2983 | |
2984 | if (!colon_seen && gfc_match (" /" ) == MATCH_YES) |
2985 | { |
2986 | if (!gfc_notify_std (GFC_STD_GNU, "Old-style " |
2987 | "initialization at %C" )) |
2988 | return MATCH_ERROR; |
2989 | |
2990 | /* Allow old style initializations for components of STRUCTUREs and MAPs |
2991 | but not components of derived types. */ |
2992 | else if (gfc_current_state () == COMP_DERIVED) |
2993 | { |
2994 | gfc_error ("Invalid old style initialization for derived type " |
2995 | "component at %C" ); |
2996 | m = MATCH_ERROR; |
2997 | goto cleanup; |
2998 | } |
2999 | |
3000 | /* For structure components, read the initializer as a special |
3001 | expression and let the rest of this function apply the initializer |
3002 | as usual. */ |
3003 | else if (gfc_comp_struct (gfc_current_state ())) |
3004 | { |
3005 | m = match_clist_expr (result: &initializer, ts: ¤t_ts, as); |
3006 | if (m == MATCH_NO) |
3007 | gfc_error ("Syntax error in old style initialization of %s at %C" , |
3008 | name); |
3009 | if (m != MATCH_YES) |
3010 | goto cleanup; |
3011 | } |
3012 | |
3013 | /* Otherwise we treat the old style initialization just like a |
3014 | DATA declaration for the current variable. */ |
3015 | else |
3016 | return match_old_style_init (name); |
3017 | } |
3018 | |
3019 | /* The double colon must be present in order to have initializers. |
3020 | Otherwise the statement is ambiguous with an assignment statement. */ |
3021 | if (colon_seen) |
3022 | { |
3023 | if (gfc_match (" =>" ) == MATCH_YES) |
3024 | { |
3025 | if (!current_attr.pointer) |
3026 | { |
3027 | gfc_error ("Initialization at %C isn't for a pointer variable" ); |
3028 | m = MATCH_ERROR; |
3029 | goto cleanup; |
3030 | } |
3031 | |
3032 | m = match_pointer_init (init: &initializer, procptr: 0); |
3033 | if (m != MATCH_YES) |
3034 | goto cleanup; |
3035 | |
3036 | /* The target of a pointer initialization must have the SAVE |
3037 | attribute. A variable in PROGRAM, MODULE, or SUBMODULE scope |
3038 | is implicit SAVEd. Explicitly, set the SAVE_IMPLICIT value. */ |
3039 | if (initializer->expr_type == EXPR_VARIABLE |
3040 | && initializer->symtree->n.sym->attr.save == SAVE_NONE |
3041 | && (gfc_current_state () == COMP_PROGRAM |
3042 | || gfc_current_state () == COMP_MODULE |
3043 | || gfc_current_state () == COMP_SUBMODULE)) |
3044 | initializer->symtree->n.sym->attr.save = SAVE_IMPLICIT; |
3045 | } |
3046 | else if (gfc_match_char ('=') == MATCH_YES) |
3047 | { |
3048 | if (current_attr.pointer) |
3049 | { |
3050 | gfc_error ("Pointer initialization at %C requires %<=>%>, " |
3051 | "not %<=%>" ); |
3052 | m = MATCH_ERROR; |
3053 | goto cleanup; |
3054 | } |
3055 | |
3056 | m = gfc_match_init_expr (&initializer); |
3057 | if (m == MATCH_NO) |
3058 | { |
3059 | gfc_error ("Expected an initialization expression at %C" ); |
3060 | m = MATCH_ERROR; |
3061 | } |
3062 | |
3063 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL) |
3064 | && !gfc_comp_struct (gfc_state_stack->state)) |
3065 | { |
3066 | gfc_error ("Initialization of variable at %C is not allowed in " |
3067 | "a PURE procedure" ); |
3068 | m = MATCH_ERROR; |
3069 | } |
3070 | |
3071 | if (current_attr.flavor != FL_PARAMETER |
3072 | && !gfc_comp_struct (gfc_state_stack->state)) |
3073 | gfc_unset_implicit_pure (gfc_current_ns->proc_name); |
3074 | |
3075 | if (m != MATCH_YES) |
3076 | goto cleanup; |
3077 | } |
3078 | } |
3079 | |
3080 | if (initializer != NULL && current_attr.allocatable |
3081 | && gfc_comp_struct (gfc_current_state ())) |
3082 | { |
3083 | gfc_error ("Initialization of allocatable component at %C is not " |
3084 | "allowed" ); |
3085 | m = MATCH_ERROR; |
3086 | goto cleanup; |
3087 | } |
3088 | |
3089 | if (gfc_current_state () == COMP_DERIVED |
3090 | && initializer && initializer->ts.type == BT_HOLLERITH) |
3091 | { |
3092 | gfc_error ("Initialization of structure component with a HOLLERITH " |
3093 | "constant at %L is not allowed" , &initializer->where); |
3094 | m = MATCH_ERROR; |
3095 | goto cleanup; |
3096 | } |
3097 | |
3098 | if (gfc_current_state () == COMP_DERIVED |
3099 | && gfc_current_block ()->attr.pdt_template) |
3100 | { |
3101 | gfc_symbol *param; |
3102 | gfc_find_symbol (name, gfc_current_block ()->f2k_derived, |
3103 | 0, ¶m); |
3104 | if (!param && (current_attr.pdt_kind || current_attr.pdt_len)) |
3105 | { |
3106 | gfc_error ("The component with KIND or LEN attribute at %C does not " |
3107 | "not appear in the type parameter list at %L" , |
3108 | &gfc_current_block ()->declared_at); |
3109 | m = MATCH_ERROR; |
3110 | goto cleanup; |
3111 | } |
3112 | else if (param && !(current_attr.pdt_kind || current_attr.pdt_len)) |
3113 | { |
3114 | gfc_error ("The component at %C that appears in the type parameter " |
3115 | "list at %L has neither the KIND nor LEN attribute" , |
3116 | &gfc_current_block ()->declared_at); |
3117 | m = MATCH_ERROR; |
3118 | goto cleanup; |
3119 | } |
3120 | else if (as && (current_attr.pdt_kind || current_attr.pdt_len)) |
3121 | { |
3122 | gfc_error ("The component at %C which is a type parameter must be " |
3123 | "a scalar" ); |
3124 | m = MATCH_ERROR; |
3125 | goto cleanup; |
3126 | } |
3127 | else if (param && initializer) |
3128 | { |
3129 | if (initializer->ts.type == BT_BOZ) |
3130 | { |
3131 | gfc_error ("BOZ literal constant at %L cannot appear as an " |
3132 | "initializer" , &initializer->where); |
3133 | m = MATCH_ERROR; |
3134 | goto cleanup; |
3135 | } |
3136 | param->value = gfc_copy_expr (initializer); |
3137 | } |
3138 | } |
3139 | |
3140 | /* Before adding a possible initializer, do a simple check for compatibility |
3141 | of lhs and rhs types. Assigning a REAL value to a derived type is not a |
3142 | good thing. */ |
3143 | if (current_ts.type == BT_DERIVED && initializer |
3144 | && (gfc_numeric_ts (&initializer->ts) |
3145 | || initializer->ts.type == BT_LOGICAL |
3146 | || initializer->ts.type == BT_CHARACTER)) |
3147 | { |
3148 | gfc_error ("Incompatible initialization between a derived type " |
3149 | "entity and an entity with %qs type at %C" , |
3150 | gfc_typename (initializer)); |
3151 | m = MATCH_ERROR; |
3152 | goto cleanup; |
3153 | } |
3154 | |
3155 | |
3156 | /* Add the initializer. Note that it is fine if initializer is |
3157 | NULL here, because we sometimes also need to check if a |
3158 | declaration *must* have an initialization expression. */ |
3159 | if (!gfc_comp_struct (gfc_current_state ())) |
3160 | t = add_init_expr_to_sym (name, initp: &initializer, var_locus: &var_locus); |
3161 | else |
3162 | { |
3163 | if (current_ts.type == BT_DERIVED |
3164 | && !current_attr.pointer && !initializer) |
3165 | initializer = gfc_default_initializer (¤t_ts); |
3166 | t = build_struct (name, cl, init: &initializer, as: &as); |
3167 | |
3168 | /* If we match a nested structure definition we expect to see the |
3169 | * body even if the variable declarations blow up, so we need to keep |
3170 | * the structure declaration around. */ |
3171 | if (gfc_new_block && gfc_new_block->attr.flavor == FL_STRUCT) |
3172 | gfc_commit_symbol (gfc_new_block); |
3173 | } |
3174 | |
3175 | m = (t) ? MATCH_YES : MATCH_ERROR; |
3176 | |
3177 | cleanup: |
3178 | /* Free stuff up and return. */ |
3179 | gfc_seen_div0 = false; |
3180 | gfc_free_expr (initializer); |
3181 | gfc_free_array_spec (as); |
3182 | |
3183 | return m; |
3184 | } |
3185 | |
3186 | |
3187 | /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification. |
3188 | This assumes that the byte size is equal to the kind number for |
3189 | non-COMPLEX types, and equal to twice the kind number for COMPLEX. */ |
3190 | |
3191 | static match |
3192 | gfc_match_old_kind_spec (gfc_typespec *ts) |
3193 | { |
3194 | match m; |
3195 | int original_kind; |
3196 | |
3197 | if (gfc_match_char ('*') != MATCH_YES) |
3198 | return MATCH_NO; |
3199 | |
3200 | m = gfc_match_small_literal_int (&ts->kind, NULL); |
3201 | if (m != MATCH_YES) |
3202 | return MATCH_ERROR; |
3203 | |
3204 | original_kind = ts->kind; |
3205 | |
3206 | /* Massage the kind numbers for complex types. */ |
3207 | if (ts->type == BT_COMPLEX) |
3208 | { |
3209 | if (ts->kind % 2) |
3210 | { |
3211 | gfc_error ("Old-style type declaration %s*%d not supported at %C" , |
3212 | gfc_basic_typename (ts->type), original_kind); |
3213 | return MATCH_ERROR; |
3214 | } |
3215 | ts->kind /= 2; |
3216 | |
3217 | } |
3218 | |
3219 | if (ts->type == BT_INTEGER && ts->kind == 4 && flag_integer4_kind == 8) |
3220 | ts->kind = 8; |
3221 | |
3222 | if (ts->type == BT_REAL || ts->type == BT_COMPLEX) |
3223 | { |
3224 | if (ts->kind == 4) |
3225 | { |
3226 | if (flag_real4_kind == 8) |
3227 | ts->kind = 8; |
3228 | if (flag_real4_kind == 10) |
3229 | ts->kind = 10; |
3230 | if (flag_real4_kind == 16) |
3231 | ts->kind = 16; |
3232 | } |
3233 | else if (ts->kind == 8) |
3234 | { |
3235 | if (flag_real8_kind == 4) |
3236 | ts->kind = 4; |
3237 | if (flag_real8_kind == 10) |
3238 | ts->kind = 10; |
3239 | if (flag_real8_kind == 16) |
3240 | ts->kind = 16; |
3241 | } |
3242 | } |
3243 | |
3244 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
3245 | { |
3246 | gfc_error ("Old-style type declaration %s*%d not supported at %C" , |
3247 | gfc_basic_typename (ts->type), original_kind); |
3248 | return MATCH_ERROR; |
3249 | } |
3250 | |
3251 | if (!gfc_notify_std (GFC_STD_GNU, |
3252 | "Nonstandard type declaration %s*%d at %C" , |
3253 | gfc_basic_typename(ts->type), original_kind)) |
3254 | return MATCH_ERROR; |
3255 | |
3256 | return MATCH_YES; |
3257 | } |
3258 | |
3259 | |
3260 | /* Match a kind specification. Since kinds are generally optional, we |
3261 | usually return MATCH_NO if something goes wrong. If a "kind=" |
3262 | string is found, then we know we have an error. */ |
3263 | |
3264 | match |
3265 | gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only) |
3266 | { |
3267 | locus where, loc; |
3268 | gfc_expr *e; |
3269 | match m, n; |
3270 | char c; |
3271 | |
3272 | m = MATCH_NO; |
3273 | n = MATCH_YES; |
3274 | e = NULL; |
3275 | saved_kind_expr = NULL; |
3276 | |
3277 | where = loc = gfc_current_locus; |
3278 | |
3279 | if (kind_expr_only) |
3280 | goto kind_expr; |
3281 | |
3282 | if (gfc_match_char ('(') == MATCH_NO) |
3283 | return MATCH_NO; |
3284 | |
3285 | /* Also gobbles optional text. */ |
3286 | if (gfc_match (" kind = " ) == MATCH_YES) |
3287 | m = MATCH_ERROR; |
3288 | |
3289 | loc = gfc_current_locus; |
3290 | |
3291 | kind_expr: |
3292 | |
3293 | n = gfc_match_init_expr (&e); |
3294 | |
3295 | if (gfc_derived_parameter_expr (e)) |
3296 | { |
3297 | ts->kind = 0; |
3298 | saved_kind_expr = gfc_copy_expr (e); |
3299 | goto close_brackets; |
3300 | } |
3301 | |
3302 | if (n != MATCH_YES) |
3303 | { |
3304 | if (gfc_matching_function) |
3305 | { |
3306 | /* The function kind expression might include use associated or |
3307 | imported parameters and try again after the specification |
3308 | expressions..... */ |
3309 | if (gfc_match_char (')') != MATCH_YES) |
3310 | { |
3311 | gfc_error ("Missing right parenthesis at %C" ); |
3312 | m = MATCH_ERROR; |
3313 | goto no_match; |
3314 | } |
3315 | |
3316 | gfc_free_expr (e); |
3317 | gfc_undo_symbols (); |
3318 | return MATCH_YES; |
3319 | } |
3320 | else |
3321 | { |
3322 | /* ....or else, the match is real. */ |
3323 | if (n == MATCH_NO) |
3324 | gfc_error ("Expected initialization expression at %C" ); |
3325 | if (n != MATCH_YES) |
3326 | return MATCH_ERROR; |
3327 | } |
3328 | } |
3329 | |
3330 | if (e->rank != 0) |
3331 | { |
3332 | gfc_error ("Expected scalar initialization expression at %C" ); |
3333 | m = MATCH_ERROR; |
3334 | goto no_match; |
3335 | } |
3336 | |
3337 | if (gfc_extract_int (e, &ts->kind, 1)) |
3338 | { |
3339 | m = MATCH_ERROR; |
3340 | goto no_match; |
3341 | } |
3342 | |
3343 | /* Before throwing away the expression, let's see if we had a |
3344 | C interoperable kind (and store the fact). */ |
3345 | if (e->ts.is_c_interop == 1) |
3346 | { |
3347 | /* Mark this as C interoperable if being declared with one |
3348 | of the named constants from iso_c_binding. */ |
3349 | ts->is_c_interop = e->ts.is_iso_c; |
3350 | ts->f90_type = e->ts.f90_type; |
3351 | if (e->symtree) |
3352 | ts->interop_kind = e->symtree->n.sym; |
3353 | } |
3354 | |
3355 | gfc_free_expr (e); |
3356 | e = NULL; |
3357 | |
3358 | /* Ignore errors to this point, if we've gotten here. This means |
3359 | we ignore the m=MATCH_ERROR from above. */ |
3360 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
3361 | { |
3362 | gfc_error ("Kind %d not supported for type %s at %C" , ts->kind, |
3363 | gfc_basic_typename (ts->type)); |
3364 | gfc_current_locus = where; |
3365 | return MATCH_ERROR; |
3366 | } |
3367 | |
3368 | /* Warn if, e.g., c_int is used for a REAL variable, but not |
3369 | if, e.g., c_double is used for COMPLEX as the standard |
3370 | explicitly says that the kind type parameter for complex and real |
3371 | variable is the same, i.e. c_float == c_float_complex. */ |
3372 | if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type |
3373 | && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX) |
3374 | || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL))) |
3375 | gfc_warning_now (opt: 0, "C kind type parameter is for type %s but type at %L " |
3376 | "is %s" , gfc_basic_typename (ts->f90_type), &where, |
3377 | gfc_basic_typename (ts->type)); |
3378 | |
3379 | close_brackets: |
3380 | |
3381 | gfc_gobble_whitespace (); |
3382 | if ((c = gfc_next_ascii_char ()) != ')' |
3383 | && (ts->type != BT_CHARACTER || c != ',')) |
3384 | { |
3385 | if (ts->type == BT_CHARACTER) |
3386 | gfc_error ("Missing right parenthesis or comma at %C" ); |
3387 | else |
3388 | gfc_error ("Missing right parenthesis at %C" ); |
3389 | m = MATCH_ERROR; |
3390 | goto no_match; |
3391 | } |
3392 | else |
3393 | /* All tests passed. */ |
3394 | m = MATCH_YES; |
3395 | |
3396 | if(m == MATCH_ERROR) |
3397 | gfc_current_locus = where; |
3398 | |
3399 | if (ts->type == BT_INTEGER && ts->kind == 4 && flag_integer4_kind == 8) |
3400 | ts->kind = 8; |
3401 | |
3402 | if (ts->type == BT_REAL || ts->type == BT_COMPLEX) |
3403 | { |
3404 | if (ts->kind == 4) |
3405 | { |
3406 | if (flag_real4_kind == 8) |
3407 | ts->kind = 8; |
3408 | if (flag_real4_kind == 10) |
3409 | ts->kind = 10; |
3410 | if (flag_real4_kind == 16) |
3411 | ts->kind = 16; |
3412 | } |
3413 | else if (ts->kind == 8) |
3414 | { |
3415 | if (flag_real8_kind == 4) |
3416 | ts->kind = 4; |
3417 | if (flag_real8_kind == 10) |
3418 | ts->kind = 10; |
3419 | if (flag_real8_kind == 16) |
3420 | ts->kind = 16; |
3421 | } |
3422 | } |
3423 | |
3424 | /* Return what we know from the test(s). */ |
3425 | return m; |
3426 | |
3427 | no_match: |
3428 | gfc_free_expr (e); |
3429 | gfc_current_locus = where; |
3430 | return m; |
3431 | } |
3432 | |
3433 | |
3434 | static match |
3435 | match_char_kind (int * kind, int * is_iso_c) |
3436 | { |
3437 | locus where; |
3438 | gfc_expr *e; |
3439 | match m, n; |
3440 | bool fail; |
3441 | |
3442 | m = MATCH_NO; |
3443 | e = NULL; |
3444 | where = gfc_current_locus; |
3445 | |
3446 | n = gfc_match_init_expr (&e); |
3447 | |
3448 | if (n != MATCH_YES && gfc_matching_function) |
3449 | { |
3450 | /* The expression might include use-associated or imported |
3451 | parameters and try again after the specification |
3452 | expressions. */ |
3453 | gfc_free_expr (e); |
3454 | gfc_undo_symbols (); |
3455 | return MATCH_YES; |
3456 | } |
3457 | |
3458 | if (n == MATCH_NO) |
3459 | gfc_error ("Expected initialization expression at %C" ); |
3460 | if (n != MATCH_YES) |
3461 | return MATCH_ERROR; |
3462 | |
3463 | if (e->rank != 0) |
3464 | { |
3465 | gfc_error ("Expected scalar initialization expression at %C" ); |
3466 | m = MATCH_ERROR; |
3467 | goto no_match; |
3468 | } |
3469 | |
3470 | if (gfc_derived_parameter_expr (e)) |
3471 | { |
3472 | saved_kind_expr = e; |
3473 | *kind = 0; |
3474 | return MATCH_YES; |
3475 | } |
3476 | |
3477 | fail = gfc_extract_int (e, kind, 1); |
3478 | *is_iso_c = e->ts.is_iso_c; |
3479 | if (fail) |
3480 | { |
3481 | m = MATCH_ERROR; |
3482 | goto no_match; |
3483 | } |
3484 | |
3485 | gfc_free_expr (e); |
3486 | |
3487 | /* Ignore errors to this point, if we've gotten here. This means |
3488 | we ignore the m=MATCH_ERROR from above. */ |
3489 | if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0) |
3490 | { |
3491 | gfc_error ("Kind %d is not supported for CHARACTER at %C" , *kind); |
3492 | m = MATCH_ERROR; |
3493 | } |
3494 | else |
3495 | /* All tests passed. */ |
3496 | m = MATCH_YES; |
3497 | |
3498 | if (m == MATCH_ERROR) |
3499 | gfc_current_locus = where; |
3500 | |
3501 | /* Return what we know from the test(s). */ |
3502 | return m; |
3503 | |
3504 | no_match: |
3505 | gfc_free_expr (e); |
3506 | gfc_current_locus = where; |
3507 | return m; |
3508 | } |
3509 | |
3510 | |
3511 | /* Match the various kind/length specifications in a CHARACTER |
3512 | declaration. We don't return MATCH_NO. */ |
3513 | |
3514 | match |
3515 | gfc_match_char_spec (gfc_typespec *ts) |
3516 | { |
3517 | int kind, seen_length, is_iso_c; |
3518 | gfc_charlen *cl; |
3519 | gfc_expr *len; |
3520 | match m; |
3521 | bool deferred; |
3522 | |
3523 | len = NULL; |
3524 | seen_length = 0; |
3525 | kind = 0; |
3526 | is_iso_c = 0; |
3527 | deferred = false; |
3528 | |
3529 | /* Try the old-style specification first. */ |
3530 | old_char_selector = 0; |
3531 | |
3532 | m = match_char_length (expr: &len, deferred: &deferred, obsolescent_check: true); |
3533 | if (m != MATCH_NO) |
3534 | { |
3535 | if (m == MATCH_YES) |
3536 | old_char_selector = 1; |
3537 | seen_length = 1; |
3538 | goto done; |
3539 | } |
3540 | |
3541 | m = gfc_match_char ('('); |
3542 | if (m != MATCH_YES) |
3543 | { |
3544 | m = MATCH_YES; /* Character without length is a single char. */ |
3545 | goto done; |
3546 | } |
3547 | |
3548 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */ |
3549 | if (gfc_match (" kind =" ) == MATCH_YES) |
3550 | { |
3551 | m = match_char_kind (kind: &kind, is_iso_c: &is_iso_c); |
3552 | |
3553 | if (m == MATCH_ERROR) |
3554 | goto done; |
3555 | if (m == MATCH_NO) |
3556 | goto syntax; |
3557 | |
3558 | if (gfc_match (" , len =" ) == MATCH_NO) |
3559 | goto rparen; |
3560 | |
3561 | m = char_len_param_value (expr: &len, deferred: &deferred); |
3562 | if (m == MATCH_NO) |
3563 | goto syntax; |
3564 | if (m == MATCH_ERROR) |
3565 | goto done; |
3566 | seen_length = 1; |
3567 | |
3568 | goto rparen; |
3569 | } |
3570 | |
3571 | /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */ |
3572 | if (gfc_match (" len =" ) == MATCH_YES) |
3573 | { |
3574 | m = char_len_param_value (expr: &len, deferred: &deferred); |
3575 | if (m == MATCH_NO) |
3576 | goto syntax; |
3577 | if (m == MATCH_ERROR) |
3578 | goto done; |
3579 | seen_length = 1; |
3580 | |
3581 | if (gfc_match_char (')') == MATCH_YES) |
3582 | goto done; |
3583 | |
3584 | if (gfc_match (" , kind =" ) != MATCH_YES) |
3585 | goto syntax; |
3586 | |
3587 | if (match_char_kind (kind: &kind, is_iso_c: &is_iso_c) == MATCH_ERROR) |
3588 | goto done; |
3589 | |
3590 | goto rparen; |
3591 | } |
3592 | |
3593 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */ |
3594 | m = char_len_param_value (expr: &len, deferred: &deferred); |
3595 | if (m == MATCH_NO) |
3596 | goto syntax; |
3597 | if (m == MATCH_ERROR) |
3598 | goto done; |
3599 | seen_length = 1; |
3600 | |
3601 | m = gfc_match_char (')'); |
3602 | if (m == MATCH_YES) |
3603 | goto done; |
3604 | |
3605 | if (gfc_match_char (',') != MATCH_YES) |
3606 | goto syntax; |
3607 | |
3608 | gfc_match (" kind =" ); /* Gobble optional text. */ |
3609 | |
3610 | m = match_char_kind (kind: &kind, is_iso_c: &is_iso_c); |
3611 | if (m == MATCH_ERROR) |
3612 | goto done; |
3613 | if (m == MATCH_NO) |
3614 | goto syntax; |
3615 | |
3616 | rparen: |
3617 | /* Require a right-paren at this point. */ |
3618 | m = gfc_match_char (')'); |
3619 | if (m == MATCH_YES) |
3620 | goto done; |
3621 | |
3622 | syntax: |
3623 | gfc_error ("Syntax error in CHARACTER declaration at %C" ); |
3624 | m = MATCH_ERROR; |
3625 | gfc_free_expr (len); |
3626 | return m; |
3627 | |
3628 | done: |
3629 | /* Deal with character functions after USE and IMPORT statements. */ |
3630 | if (gfc_matching_function) |
3631 | { |
3632 | gfc_free_expr (len); |
3633 | gfc_undo_symbols (); |
3634 | return MATCH_YES; |
3635 | } |
3636 | |
3637 | if (m != MATCH_YES) |
3638 | { |
3639 | gfc_free_expr (len); |
3640 | return m; |
3641 | } |
3642 | |
3643 | /* Do some final massaging of the length values. */ |
3644 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
3645 | |
3646 | if (seen_length == 0) |
3647 | cl->length = gfc_get_int_expr (gfc_charlen_int_kind, NULL, 1); |
3648 | else |
3649 | { |
3650 | /* If gfortran ends up here, then len may be reducible to a constant. |
3651 | Try to do that here. If it does not reduce, simply assign len to |
3652 | charlen. A complication occurs with user-defined generic functions, |
3653 | which are not resolved. Use a private namespace to deal with |
3654 | generic functions. */ |
3655 | |
3656 | if (len && len->expr_type != EXPR_CONSTANT) |
3657 | { |
3658 | gfc_namespace *old_ns; |
3659 | gfc_expr *e; |
3660 | |
3661 | old_ns = gfc_current_ns; |
3662 | gfc_current_ns = gfc_get_namespace (NULL, 0); |
3663 | |
3664 | e = gfc_copy_expr (len); |
3665 | gfc_push_suppress_errors (); |
3666 | gfc_reduce_init_expr (expr: e); |
3667 | gfc_pop_suppress_errors (); |
3668 | if (e->expr_type == EXPR_CONSTANT) |
3669 | { |
3670 | gfc_replace_expr (len, e); |
3671 | if (mpz_cmp_si (len->value.integer, 0) < 0) |
3672 | mpz_set_ui (len->value.integer, 0); |
3673 | } |
3674 | else |
3675 | gfc_free_expr (e); |
3676 | |
3677 | gfc_free_namespace (gfc_current_ns); |
3678 | gfc_current_ns = old_ns; |
3679 | } |
3680 | |
3681 | cl->length = len; |
3682 | } |
3683 | |
3684 | ts->u.cl = cl; |
3685 | ts->kind = kind == 0 ? gfc_default_character_kind : kind; |
3686 | ts->deferred = deferred; |
3687 | |
3688 | /* We have to know if it was a C interoperable kind so we can |
3689 | do accurate type checking of bind(c) procs, etc. */ |
3690 | if (kind != 0) |
3691 | /* Mark this as C interoperable if being declared with one |
3692 | of the named constants from iso_c_binding. */ |
3693 | ts->is_c_interop = is_iso_c; |
3694 | else if (len != NULL) |
3695 | /* Here, we might have parsed something such as: character(c_char) |
3696 | In this case, the parsing code above grabs the c_char when |
3697 | looking for the length (line 1690, roughly). it's the last |
3698 | testcase for parsing the kind params of a character variable. |
3699 | However, it's not actually the length. this seems like it |
3700 | could be an error. |
3701 | To see if the user used a C interop kind, test the expr |
3702 | of the so called length, and see if it's C interoperable. */ |
3703 | ts->is_c_interop = len->ts.is_iso_c; |
3704 | |
3705 | return MATCH_YES; |
3706 | } |
3707 | |
3708 | |
3709 | /* Matches a RECORD declaration. */ |
3710 | |
3711 | static match |
3712 | match_record_decl (char *name) |
3713 | { |
3714 | locus old_loc; |
3715 | old_loc = gfc_current_locus; |
3716 | match m; |
3717 | |
3718 | m = gfc_match (" record /" ); |
3719 | if (m == MATCH_YES) |
3720 | { |
3721 | if (!flag_dec_structure) |
3722 | { |
3723 | gfc_current_locus = old_loc; |
3724 | gfc_error ("RECORD at %C is an extension, enable it with " |
3725 | "%<-fdec-structure%>" ); |
3726 | return MATCH_ERROR; |
3727 | } |
3728 | m = gfc_match (" %n/" , name); |
3729 | if (m == MATCH_YES) |
3730 | return MATCH_YES; |
3731 | } |
3732 | |
3733 | gfc_current_locus = old_loc; |
3734 | if (flag_dec_structure |
3735 | && (gfc_match (" record% " ) == MATCH_YES |
3736 | || gfc_match (" record%t" ) == MATCH_YES)) |
3737 | gfc_error ("Structure name expected after RECORD at %C" ); |
3738 | if (m == MATCH_NO) |
3739 | return MATCH_NO; |
3740 | |
3741 | return MATCH_ERROR; |
3742 | } |
3743 | |
3744 | |
3745 | /* This function uses the gfc_actual_arglist 'type_param_spec_list' as a source |
3746 | of expressions to substitute into the possibly parameterized expression |
3747 | 'e'. Using a list is inefficient but should not be too bad since the |
3748 | number of type parameters is not likely to be large. */ |
3749 | static bool |
3750 | insert_parameter_exprs (gfc_expr* e, gfc_symbol* sym ATTRIBUTE_UNUSED, |
3751 | int* f) |
3752 | { |
3753 | gfc_actual_arglist *param; |
3754 | gfc_expr *copy; |
3755 | |
3756 | if (e->expr_type != EXPR_VARIABLE) |
3757 | return false; |
3758 | |
3759 | gcc_assert (e->symtree); |
3760 | if (e->symtree->n.sym->attr.pdt_kind |
3761 | || (*f != 0 && e->symtree->n.sym->attr.pdt_len)) |
3762 | { |
3763 | for (param = type_param_spec_list; param; param = param->next) |
3764 | if (strcmp (s1: e->symtree->n.sym->name, s2: param->name) == 0) |
3765 | break; |
3766 | |
3767 | if (param) |
3768 | { |
3769 | copy = gfc_copy_expr (param->expr); |
3770 | *e = *copy; |
3771 | free (ptr: copy); |
3772 | } |
3773 | } |
3774 | |
3775 | return false; |
3776 | } |
3777 | |
3778 | |
3779 | static bool |
3780 | gfc_insert_kind_parameter_exprs (gfc_expr *e) |
3781 | { |
3782 | return gfc_traverse_expr (e, NULL, &insert_parameter_exprs, 0); |
3783 | } |
3784 | |
3785 | |
3786 | bool |
3787 | gfc_insert_parameter_exprs (gfc_expr *e, gfc_actual_arglist *param_list) |
3788 | { |
3789 | gfc_actual_arglist *old_param_spec_list = type_param_spec_list; |
3790 | type_param_spec_list = param_list; |
3791 | bool res = gfc_traverse_expr (e, NULL, &insert_parameter_exprs, 1); |
3792 | type_param_spec_list = old_param_spec_list; |
3793 | return res; |
3794 | } |
3795 | |
3796 | /* Determines the instance of a parameterized derived type to be used by |
3797 | matching determining the values of the kind parameters and using them |
3798 | in the name of the instance. If the instance exists, it is used, otherwise |
3799 | a new derived type is created. */ |
3800 | match |
3801 | gfc_get_pdt_instance (gfc_actual_arglist *param_list, gfc_symbol **sym, |
3802 | gfc_actual_arglist **ext_param_list) |
3803 | { |
3804 | /* The PDT template symbol. */ |
3805 | gfc_symbol *pdt = *sym; |
3806 | /* The symbol for the parameter in the template f2k_namespace. */ |
3807 | gfc_symbol *param; |
3808 | /* The hoped for instance of the PDT. */ |
3809 | gfc_symbol *instance; |
3810 | /* The list of parameters appearing in the PDT declaration. */ |
3811 | gfc_formal_arglist *type_param_name_list; |
3812 | /* Used to store the parameter specification list during recursive calls. */ |
3813 | gfc_actual_arglist *old_param_spec_list; |
3814 | /* Pointers to the parameter specification being used. */ |
3815 | gfc_actual_arglist *actual_param; |
3816 | gfc_actual_arglist *tail = NULL; |
3817 | /* Used to build up the name of the PDT instance. The prefix uses 4 |
3818 | characters and each KIND parameter 2 more. Allow 8 of the latter. */ |
3819 | char name[GFC_MAX_SYMBOL_LEN + 21]; |
3820 | |
3821 | bool name_seen = (param_list == NULL); |
3822 | bool assumed_seen = false; |
3823 | bool deferred_seen = false; |
3824 | bool spec_error = false; |
3825 | int kind_value, i; |
3826 | gfc_expr *kind_expr; |
3827 | gfc_component *c1, *c2; |
3828 | match m; |
3829 | |
3830 | type_param_spec_list = NULL; |
3831 | |
3832 | type_param_name_list = pdt->formal; |
3833 | actual_param = param_list; |
3834 | sprintf (s: name, format: "Pdt%s" , pdt->name); |
3835 | |
3836 | /* Run through the parameter name list and pick up the actual |
3837 | parameter values or use the default values in the PDT declaration. */ |
3838 | for (; type_param_name_list; |
3839 | type_param_name_list = type_param_name_list->next) |
3840 | { |
3841 | if (actual_param && actual_param->spec_type != SPEC_EXPLICIT) |
3842 | { |
3843 | if (actual_param->spec_type == SPEC_ASSUMED) |
3844 | spec_error = deferred_seen; |
3845 | else |
3846 | spec_error = assumed_seen; |
3847 | |
3848 | if (spec_error) |
3849 | { |
3850 | gfc_error ("The type parameter spec list at %C cannot contain " |
3851 | "both ASSUMED and DEFERRED parameters" ); |
3852 | goto error_return; |
3853 | } |
3854 | } |
3855 | |
3856 | if (actual_param && actual_param->name) |
3857 | name_seen = true; |
3858 | param = type_param_name_list->sym; |
3859 | |
3860 | if (!param || !param->name) |
3861 | continue; |
3862 | |
3863 | c1 = gfc_find_component (pdt, param->name, false, true, NULL); |
3864 | /* An error should already have been thrown in resolve.cc |
3865 | (resolve_fl_derived0). */ |
3866 | if (!pdt->attr.use_assoc && !c1) |
3867 | goto error_return; |
3868 | |
3869 | kind_expr = NULL; |
3870 | if (!name_seen) |
3871 | { |
3872 | if (!actual_param && !(c1 && c1->initializer)) |
3873 | { |
3874 | gfc_error ("The type parameter spec list at %C does not contain " |
3875 | "enough parameter expressions" ); |
3876 | goto error_return; |
3877 | } |
3878 | else if (!actual_param && c1 && c1->initializer) |
3879 | kind_expr = gfc_copy_expr (c1->initializer); |
3880 | else if (actual_param && actual_param->spec_type == SPEC_EXPLICIT) |
3881 | kind_expr = gfc_copy_expr (actual_param->expr); |
3882 | } |
3883 | else |
3884 | { |
3885 | actual_param = param_list; |
3886 | for (;actual_param; actual_param = actual_param->next) |
3887 | if (actual_param->name |
3888 | && strcmp (s1: actual_param->name, s2: param->name) == 0) |
3889 | break; |
3890 | if (actual_param && actual_param->spec_type == SPEC_EXPLICIT) |
3891 | kind_expr = gfc_copy_expr (actual_param->expr); |
3892 | else |
3893 | { |
3894 | if (c1->initializer) |
3895 | kind_expr = gfc_copy_expr (c1->initializer); |
3896 | else if (!(actual_param && param->attr.pdt_len)) |
3897 | { |
3898 | gfc_error ("The derived parameter %qs at %C does not " |
3899 | "have a default value" , param->name); |
3900 | goto error_return; |
3901 | } |
3902 | } |
3903 | } |
3904 | |
3905 | /* Store the current parameter expressions in a temporary actual |
3906 | arglist 'list' so that they can be substituted in the corresponding |
3907 | expressions in the PDT instance. */ |
3908 | if (type_param_spec_list == NULL) |
3909 | { |
3910 | type_param_spec_list = gfc_get_actual_arglist (); |
3911 | tail = type_param_spec_list; |
3912 | } |
3913 | else |
3914 | { |
3915 | tail->next = gfc_get_actual_arglist (); |
3916 | tail = tail->next; |
3917 | } |
3918 | tail->name = param->name; |
3919 | |
3920 | if (kind_expr) |
3921 | { |
3922 | /* Try simplification even for LEN expressions. */ |
3923 | bool ok; |
3924 | gfc_resolve_expr (kind_expr); |
3925 | ok = gfc_simplify_expr (kind_expr, 1); |
3926 | /* Variable expressions seem to default to BT_PROCEDURE. |
3927 | TODO find out why this is and fix it. */ |
3928 | if (kind_expr->ts.type != BT_INTEGER |
3929 | && kind_expr->ts.type != BT_PROCEDURE) |
3930 | { |
3931 | gfc_error ("The parameter expression at %C must be of " |
3932 | "INTEGER type and not %s type" , |
3933 | gfc_basic_typename (kind_expr->ts.type)); |
3934 | goto error_return; |
3935 | } |
3936 | if (kind_expr->ts.type == BT_INTEGER && !ok) |
3937 | { |
3938 | gfc_error ("The parameter expression at %C does not " |
3939 | "simplify to an INTEGER constant" ); |
3940 | goto error_return; |
3941 | } |
3942 | |
3943 | tail->expr = gfc_copy_expr (kind_expr); |
3944 | } |
3945 | |
3946 | if (actual_param) |
3947 | tail->spec_type = actual_param->spec_type; |
3948 | |
3949 | if (!param->attr.pdt_kind) |
3950 | { |
3951 | if (!name_seen && actual_param) |
3952 | actual_param = actual_param->next; |
3953 | if (kind_expr) |
3954 | { |
3955 | gfc_free_expr (kind_expr); |
3956 | kind_expr = NULL; |
3957 | } |
3958 | continue; |
3959 | } |
3960 | |
3961 | if (actual_param |
3962 | && (actual_param->spec_type == SPEC_ASSUMED |
3963 | || actual_param->spec_type == SPEC_DEFERRED)) |
3964 | { |
3965 | gfc_error ("The KIND parameter %qs at %C cannot either be " |
3966 | "ASSUMED or DEFERRED" , param->name); |
3967 | goto error_return; |
3968 | } |
3969 | |
3970 | if (!kind_expr || !gfc_is_constant_expr (kind_expr)) |
3971 | { |
3972 | gfc_error ("The value for the KIND parameter %qs at %C does not " |
3973 | "reduce to a constant expression" , param->name); |
3974 | goto error_return; |
3975 | } |
3976 | |
3977 | gfc_extract_int (kind_expr, &kind_value); |
3978 | sprintf (s: name + strlen (s: name), format: "_%d" , kind_value); |
3979 | |
3980 | if (!name_seen && actual_param) |
3981 | actual_param = actual_param->next; |
3982 | gfc_free_expr (kind_expr); |
3983 | } |
3984 | |
3985 | if (!name_seen && actual_param) |
3986 | { |
3987 | gfc_error ("The type parameter spec list at %C contains too many " |
3988 | "parameter expressions" ); |
3989 | goto error_return; |
3990 | } |
3991 | |
3992 | /* Now we search for the PDT instance 'name'. If it doesn't exist, we |
3993 | build it, using 'pdt' as a template. */ |
3994 | if (gfc_get_symbol (name, pdt->ns, &instance)) |
3995 | { |
3996 | gfc_error ("Parameterized derived type at %C is ambiguous" ); |
3997 | goto error_return; |
3998 | } |
3999 | |
4000 | m = MATCH_YES; |
4001 | |
4002 | if (instance->attr.flavor == FL_DERIVED |
4003 | && instance->attr.pdt_type) |
4004 | { |
4005 | instance->refs++; |
4006 | if (ext_param_list) |
4007 | *ext_param_list = type_param_spec_list; |
4008 | *sym = instance; |
4009 | gfc_commit_symbols (); |
4010 | return m; |
4011 | } |
4012 | |
4013 | /* Start building the new instance of the parameterized type. */ |
4014 | gfc_copy_attr (&instance->attr, &pdt->attr, &pdt->declared_at); |
4015 | instance->attr.pdt_template = 0; |
4016 | instance->attr.pdt_type = 1; |
4017 | instance->declared_at = gfc_current_locus; |
4018 | |
4019 | /* Add the components, replacing the parameters in all expressions |
4020 | with the expressions for their values in 'type_param_spec_list'. */ |
4021 | c1 = pdt->components; |
4022 | tail = type_param_spec_list; |
4023 | for (; c1; c1 = c1->next) |
4024 | { |
4025 | gfc_add_component (instance, c1->name, &c2); |
4026 | |
4027 | c2->ts = c1->ts; |
4028 | c2->attr = c1->attr; |
4029 | |
4030 | /* The order of declaration of the type_specs might not be the |
4031 | same as that of the components. */ |
4032 | if (c1->attr.pdt_kind || c1->attr.pdt_len) |
4033 | { |
4034 | for (tail = type_param_spec_list; tail; tail = tail->next) |
4035 | if (strcmp (s1: c1->name, s2: tail->name) == 0) |
4036 | break; |
4037 | } |
4038 | |
4039 | /* Deal with type extension by recursively calling this function |
4040 | to obtain the instance of the extended type. */ |
4041 | if (gfc_current_state () != COMP_DERIVED |
4042 | && c1 == pdt->components |
4043 | && (c1->ts.type == BT_DERIVED || c1->ts.type == BT_CLASS) |
4044 | && c1->ts.u.derived && c1->ts.u.derived->attr.pdt_template |
4045 | && gfc_get_derived_super_type (*sym) == c2->ts.u.derived) |
4046 | { |
4047 | gfc_formal_arglist *f; |
4048 | |
4049 | old_param_spec_list = type_param_spec_list; |
4050 | |
4051 | /* Obtain a spec list appropriate to the extended type..*/ |
4052 | actual_param = gfc_copy_actual_arglist (type_param_spec_list); |
4053 | type_param_spec_list = actual_param; |
4054 | for (f = c1->ts.u.derived->formal; f && f->next; f = f->next) |
4055 | actual_param = actual_param->next; |
4056 | if (actual_param) |
4057 | { |
4058 | gfc_free_actual_arglist (actual_param->next); |
4059 | actual_param->next = NULL; |
4060 | } |
4061 | |
4062 | /* Now obtain the PDT instance for the extended type. */ |
4063 | c2->param_list = type_param_spec_list; |
4064 | m = gfc_get_pdt_instance (param_list: type_param_spec_list, sym: &c2->ts.u.derived, |
4065 | NULL); |
4066 | type_param_spec_list = old_param_spec_list; |
4067 | |
4068 | c2->ts.u.derived->refs++; |
4069 | gfc_set_sym_referenced (c2->ts.u.derived); |
4070 | |
4071 | /* Set extension level. */ |
4072 | if (c2->ts.u.derived->attr.extension == 255) |
4073 | { |
4074 | /* Since the extension field is 8 bit wide, we can only have |
4075 | up to 255 extension levels. */ |
4076 | gfc_error ("Maximum extension level reached with type %qs at %L" , |
4077 | c2->ts.u.derived->name, |
4078 | &c2->ts.u.derived->declared_at); |
4079 | goto error_return; |
4080 | } |
4081 | instance->attr.extension = c2->ts.u.derived->attr.extension + 1; |
4082 | |
4083 | continue; |
4084 | } |
4085 | |
4086 | /* Set the component kind using the parameterized expression. */ |
4087 | if ((c1->ts.kind == 0 || c1->ts.type == BT_CHARACTER) |
4088 | && c1->kind_expr != NULL) |
4089 | { |
4090 | gfc_expr *e = gfc_copy_expr (c1->kind_expr); |
4091 | gfc_insert_kind_parameter_exprs (e); |
4092 | gfc_simplify_expr (e, 1); |
4093 | gfc_extract_int (e, &c2->ts.kind); |
4094 | gfc_free_expr (e); |
4095 | if (gfc_validate_kind (c2->ts.type, c2->ts.kind, true) < 0) |
4096 | { |
4097 | gfc_error ("Kind %d not supported for type %s at %C" , |
4098 | c2->ts.kind, gfc_basic_typename (c2->ts.type)); |
4099 | goto error_return; |
4100 | } |
4101 | } |
4102 | |
4103 | /* Similarly, set the string length if parameterized. */ |
4104 | if (c1->ts.type == BT_CHARACTER |
4105 | && c1->ts.u.cl->length |
4106 | && gfc_derived_parameter_expr (c1->ts.u.cl->length)) |
4107 | { |
4108 | gfc_expr *e; |
4109 | e = gfc_copy_expr (c1->ts.u.cl->length); |
4110 | gfc_insert_kind_parameter_exprs (e); |
4111 | gfc_simplify_expr (e, 1); |
4112 | c2->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
4113 | c2->ts.u.cl->length = e; |
4114 | c2->attr.pdt_string = 1; |
4115 | } |
4116 | |
4117 | /* Set up either the KIND/LEN initializer, if constant, |
4118 | or the parameterized expression. Use the template |
4119 | initializer if one is not already set in this instance. */ |
4120 | if (c2->attr.pdt_kind || c2->attr.pdt_len) |
4121 | { |
4122 | if (tail && tail->expr && gfc_is_constant_expr (tail->expr)) |
4123 | c2->initializer = gfc_copy_expr (tail->expr); |
4124 | else if (tail && tail->expr) |
4125 | { |
4126 | c2->param_list = gfc_get_actual_arglist (); |
4127 | c2->param_list->name = tail->name; |
4128 | c2->param_list->expr = gfc_copy_expr (tail->expr); |
4129 | c2->param_list->next = NULL; |
4130 | } |
4131 | |
4132 | if (!c2->initializer && c1->initializer) |
4133 | c2->initializer = gfc_copy_expr (c1->initializer); |
4134 | } |
4135 | |
4136 | /* Copy the array spec. */ |
4137 | c2->as = gfc_copy_array_spec (c1->as); |
4138 | if (c1->ts.type == BT_CLASS) |
4139 | CLASS_DATA (c2)->as = gfc_copy_array_spec (CLASS_DATA (c1)->as); |
4140 | |
4141 | /* Determine if an array spec is parameterized. If so, substitute |
4142 | in the parameter expressions for the bounds and set the pdt_array |
4143 | attribute. Notice that this attribute must be unconditionally set |
4144 | if this is an array of parameterized character length. */ |
4145 | if (c1->as && c1->as->type == AS_EXPLICIT) |
4146 | { |
4147 | bool pdt_array = false; |
4148 | |
4149 | /* Are the bounds of the array parameterized? */ |
4150 | for (i = 0; i < c1->as->rank; i++) |
4151 | { |
4152 | if (gfc_derived_parameter_expr (c1->as->lower[i])) |
4153 | pdt_array = true; |
4154 | if (gfc_derived_parameter_expr (c1->as->upper[i])) |
4155 | pdt_array = true; |
4156 | } |
4157 | |
4158 | /* If they are, free the expressions for the bounds and |
4159 | replace them with the template expressions with substitute |
4160 | values. */ |
4161 | for (i = 0; pdt_array && i < c1->as->rank; i++) |
4162 | { |
4163 | gfc_expr *e; |
4164 | e = gfc_copy_expr (c1->as->lower[i]); |
4165 | gfc_insert_kind_parameter_exprs (e); |
4166 | gfc_simplify_expr (e, 1); |
4167 | gfc_free_expr (c2->as->lower[i]); |
4168 | c2->as->lower[i] = e; |
4169 | e = gfc_copy_expr (c1->as->upper[i]); |
4170 | gfc_insert_kind_parameter_exprs (e); |
4171 | gfc_simplify_expr (e, 1); |
4172 | gfc_free_expr (c2->as->upper[i]); |
4173 | c2->as->upper[i] = e; |
4174 | } |
4175 | c2->attr.pdt_array = pdt_array ? 1 : c2->attr.pdt_string; |
4176 | if (c1->initializer) |
4177 | { |
4178 | c2->initializer = gfc_copy_expr (c1->initializer); |
4179 | gfc_insert_kind_parameter_exprs (e: c2->initializer); |
4180 | gfc_simplify_expr (c2->initializer, 1); |
4181 | } |
4182 | } |
4183 | |
4184 | /* Recurse into this function for PDT components. */ |
4185 | if ((c1->ts.type == BT_DERIVED || c1->ts.type == BT_CLASS) |
4186 | && c1->ts.u.derived && c1->ts.u.derived->attr.pdt_template) |
4187 | { |
4188 | gfc_actual_arglist *params; |
4189 | /* The component in the template has a list of specification |
4190 | expressions derived from its declaration. */ |
4191 | params = gfc_copy_actual_arglist (c1->param_list); |
4192 | actual_param = params; |
4193 | /* Substitute the template parameters with the expressions |
4194 | from the specification list. */ |
4195 | for (;actual_param; actual_param = actual_param->next) |
4196 | gfc_insert_parameter_exprs (e: actual_param->expr, |
4197 | param_list: type_param_spec_list); |
4198 | |
4199 | /* Now obtain the PDT instance for the component. */ |
4200 | old_param_spec_list = type_param_spec_list; |
4201 | m = gfc_get_pdt_instance (param_list: params, sym: &c2->ts.u.derived, NULL); |
4202 | type_param_spec_list = old_param_spec_list; |
4203 | |
4204 | c2->param_list = params; |
4205 | if (!(c2->attr.pointer || c2->attr.allocatable)) |
4206 | c2->initializer = gfc_default_initializer (&c2->ts); |
4207 | |
4208 | if (c2->attr.allocatable) |
4209 | instance->attr.alloc_comp = 1; |
4210 | } |
4211 | } |
4212 | |
4213 | gfc_commit_symbol (instance); |
4214 | if (ext_param_list) |
4215 | *ext_param_list = type_param_spec_list; |
4216 | *sym = instance; |
4217 | return m; |
4218 | |
4219 | error_return: |
4220 | gfc_free_actual_arglist (type_param_spec_list); |
4221 | return MATCH_ERROR; |
4222 | } |
4223 | |
4224 | |
4225 | /* Match a legacy nonstandard BYTE type-spec. */ |
4226 | |
4227 | static match |
4228 | match_byte_typespec (gfc_typespec *ts) |
4229 | { |
4230 | if (gfc_match (" byte" ) == MATCH_YES) |
4231 | { |
4232 | if (!gfc_notify_std (GFC_STD_GNU, "BYTE type at %C" )) |
4233 | return MATCH_ERROR; |
4234 | |
4235 | if (gfc_current_form == FORM_FREE) |
4236 | { |
4237 | char c = gfc_peek_ascii_char (); |
4238 | if (!gfc_is_whitespace (c) && c != ',') |
4239 | return MATCH_NO; |
4240 | } |
4241 | |
4242 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) |
4243 | { |
4244 | gfc_error ("BYTE type used at %C " |
4245 | "is not available on the target machine" ); |
4246 | return MATCH_ERROR; |
4247 | } |
4248 | |
4249 | ts->type = BT_INTEGER; |
4250 | ts->kind = 1; |
4251 | return MATCH_YES; |
4252 | } |
4253 | return MATCH_NO; |
4254 | } |
4255 | |
4256 | |
4257 | /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts |
4258 | structure to the matched specification. This is necessary for FUNCTION and |
4259 | IMPLICIT statements. |
4260 | |
4261 | If implicit_flag is nonzero, then we don't check for the optional |
4262 | kind specification. Not doing so is needed for matching an IMPLICIT |
4263 | statement correctly. */ |
4264 | |
4265 | match |
4266 | gfc_match_decl_type_spec (gfc_typespec *ts, int implicit_flag) |
4267 | { |
4268 | /* Provide sufficient space to hold "pdtsymbol". */ |
4269 | char *name = XALLOCAVEC (char, GFC_MAX_SYMBOL_LEN + 1); |
4270 | gfc_symbol *sym, *dt_sym; |
4271 | match m; |
4272 | char c; |
4273 | bool seen_deferred_kind, matched_type; |
4274 | const char *dt_name; |
4275 | |
4276 | decl_type_param_list = NULL; |
4277 | |
4278 | /* A belt and braces check that the typespec is correctly being treated |
4279 | as a deferred characteristic association. */ |
4280 | seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION) |
4281 | && (gfc_current_block ()->result->ts.kind == -1) |
4282 | && (ts->kind == -1); |
4283 | gfc_clear_ts (ts); |
4284 | if (seen_deferred_kind) |
4285 | ts->kind = -1; |
4286 | |
4287 | /* Clear the current binding label, in case one is given. */ |
4288 | curr_binding_label = NULL; |
4289 | |
4290 | /* Match BYTE type-spec. */ |
4291 | m = match_byte_typespec (ts); |
4292 | if (m != MATCH_NO) |
4293 | return m; |
4294 | |
4295 | m = gfc_match (" type (" ); |
4296 | matched_type = (m == MATCH_YES); |
4297 | if (matched_type) |
4298 | { |
4299 | gfc_gobble_whitespace (); |
4300 | if (gfc_peek_ascii_char () == '*') |
4301 | { |
4302 | if ((m = gfc_match ("* ) " )) != MATCH_YES) |
4303 | return m; |
4304 | if (gfc_comp_struct (gfc_current_state ())) |
4305 | { |
4306 | gfc_error ("Assumed type at %C is not allowed for components" ); |
4307 | return MATCH_ERROR; |
4308 | } |
4309 | if (!gfc_notify_std (GFC_STD_F2018, "Assumed type at %C" )) |
4310 | return MATCH_ERROR; |
4311 | ts->type = BT_ASSUMED; |
4312 | return MATCH_YES; |
4313 | } |
4314 | |
4315 | m = gfc_match ("%n" , name); |
4316 | matched_type = (m == MATCH_YES); |
4317 | } |
4318 | |
4319 | if ((matched_type && strcmp (s1: "integer" , s2: name) == 0) |
4320 | || (!matched_type && gfc_match (" integer" ) == MATCH_YES)) |
4321 | { |
4322 | ts->type = BT_INTEGER; |
4323 | ts->kind = gfc_default_integer_kind; |
4324 | goto get_kind; |
4325 | } |
4326 | |
4327 | if ((matched_type && strcmp (s1: "character" , s2: name) == 0) |
4328 | || (!matched_type && gfc_match (" character" ) == MATCH_YES)) |
4329 | { |
4330 | if (matched_type |
4331 | && !gfc_notify_std (GFC_STD_F2008, "TYPE with " |
4332 | "intrinsic-type-spec at %C" )) |
4333 | return MATCH_ERROR; |
4334 | |
4335 | ts->type = BT_CHARACTER; |
4336 | if (implicit_flag == 0) |
4337 | m = gfc_match_char_spec (ts); |
4338 | else |
4339 | m = MATCH_YES; |
4340 | |
4341 | if (matched_type && m == MATCH_YES && gfc_match_char (')') != MATCH_YES) |
4342 | { |
4343 | gfc_error ("Malformed type-spec at %C" ); |
4344 | return MATCH_ERROR; |
4345 | } |
4346 | |
4347 | return m; |
4348 | } |
4349 | |
4350 | if ((matched_type && strcmp (s1: "real" , s2: name) == 0) |
4351 | || (!matched_type && gfc_match (" real" ) == MATCH_YES)) |
4352 | { |
4353 | ts->type = BT_REAL; |
4354 | ts->kind = gfc_default_real_kind; |
4355 | goto get_kind; |
4356 | } |
4357 | |
4358 | if ((matched_type |
4359 | && (strcmp (s1: "doubleprecision" , s2: name) == 0 |
4360 | || (strcmp (s1: "double" , s2: name) == 0 |
4361 | && gfc_match (" precision" ) == MATCH_YES))) |
4362 | || (!matched_type && gfc_match (" double precision" ) == MATCH_YES)) |
4363 | { |
4364 | if (matched_type |
4365 | && !gfc_notify_std (GFC_STD_F2008, "TYPE with " |
4366 | "intrinsic-type-spec at %C" )) |
4367 | return MATCH_ERROR; |
4368 | |
4369 | if (matched_type && gfc_match_char (')') != MATCH_YES) |
4370 | { |
4371 | gfc_error ("Malformed type-spec at %C" ); |
4372 | return MATCH_ERROR; |
4373 | } |
4374 | |
4375 | ts->type = BT_REAL; |
4376 | ts->kind = gfc_default_double_kind; |
4377 | return MATCH_YES; |
4378 | } |
4379 | |
4380 | if ((matched_type && strcmp (s1: "complex" , s2: name) == 0) |
4381 | || (!matched_type && gfc_match (" complex" ) == MATCH_YES)) |
4382 | { |
4383 | ts->type = BT_COMPLEX; |
4384 | ts->kind = gfc_default_complex_kind; |
4385 | goto get_kind; |
4386 | } |
4387 | |
4388 | if ((matched_type |
4389 | && (strcmp (s1: "doublecomplex" , s2: name) == 0 |
4390 | || (strcmp (s1: "double" , s2: name) == 0 |
4391 | && gfc_match (" complex" ) == MATCH_YES))) |
4392 | || (!matched_type && gfc_match (" double complex" ) == MATCH_YES)) |
4393 | { |
4394 | if (!gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C" )) |
4395 | return MATCH_ERROR; |
4396 | |
4397 | if (matched_type |
4398 | && !gfc_notify_std (GFC_STD_F2008, "TYPE with " |
4399 | "intrinsic-type-spec at %C" )) |
4400 | return MATCH_ERROR; |
4401 | |
4402 | if (matched_type && gfc_match_char (')') != MATCH_YES) |
4403 | { |
4404 | gfc_error ("Malformed type-spec at %C" ); |
4405 | return MATCH_ERROR; |
4406 | } |
4407 | |
4408 | ts->type = BT_COMPLEX; |
4409 | ts->kind = gfc_default_double_kind; |
4410 | return MATCH_YES; |
4411 | } |
4412 | |
4413 | if ((matched_type && strcmp (s1: "logical" , s2: name) == 0) |
4414 | || (!matched_type && gfc_match (" logical" ) == MATCH_YES)) |
4415 | { |
4416 | ts->type = BT_LOGICAL; |
4417 | ts->kind = gfc_default_logical_kind; |
4418 | goto get_kind; |
4419 | } |
4420 | |
4421 | if (matched_type) |
4422 | { |
4423 | m = gfc_match_actual_arglist (1, &decl_type_param_list, true); |
4424 | if (m == MATCH_ERROR) |
4425 | return m; |
4426 | |
4427 | gfc_gobble_whitespace (); |
4428 | if (gfc_peek_ascii_char () != ')') |
4429 | { |
4430 | gfc_error ("Malformed type-spec at %C" ); |
4431 | return MATCH_ERROR; |
4432 | } |
4433 | m = gfc_match_char (')'); /* Burn closing ')'. */ |
4434 | } |
4435 | |
4436 | if (m != MATCH_YES) |
4437 | m = match_record_decl (name); |
4438 | |
4439 | if (matched_type || m == MATCH_YES) |
4440 | { |
4441 | ts->type = BT_DERIVED; |
4442 | /* We accept record/s/ or type(s) where s is a structure, but we |
4443 | * don't need all the extra derived-type stuff for structures. */ |
4444 | if (gfc_find_symbol (gfc_dt_upper_string (name), NULL, 1, &sym)) |
4445 | { |
4446 | gfc_error ("Type name %qs at %C is ambiguous" , name); |
4447 | return MATCH_ERROR; |
4448 | } |
4449 | |
4450 | if (sym && sym->attr.flavor == FL_DERIVED |
4451 | && sym->attr.pdt_template |
4452 | && gfc_current_state () != COMP_DERIVED) |
4453 | { |
4454 | m = gfc_get_pdt_instance (param_list: decl_type_param_list, sym: &sym, NULL); |
4455 | if (m != MATCH_YES) |
4456 | return m; |
4457 | gcc_assert (!sym->attr.pdt_template && sym->attr.pdt_type); |
4458 | ts->u.derived = sym; |
4459 | const char* lower = gfc_dt_lower_string (sym->name); |
4460 | size_t len = strlen (s: lower); |
4461 | /* Reallocate with sufficient size. */ |
4462 | if (len > GFC_MAX_SYMBOL_LEN) |
4463 | name = XALLOCAVEC (char, len + 1); |
4464 | memcpy (dest: name, src: lower, n: len); |
4465 | name[len] = '\0'; |
4466 | } |
4467 | |
4468 | if (sym && sym->attr.flavor == FL_STRUCT) |
4469 | { |
4470 | ts->u.derived = sym; |
4471 | return MATCH_YES; |
4472 | } |
4473 | /* Actually a derived type. */ |
4474 | } |
4475 | |
4476 | else |
4477 | { |
4478 | /* Match nested STRUCTURE declarations; only valid within another |
4479 | structure declaration. */ |
4480 | if (flag_dec_structure |
4481 | && (gfc_current_state () == COMP_STRUCTURE |
4482 | || gfc_current_state () == COMP_MAP)) |
4483 | { |
4484 | m = gfc_match (" structure" ); |
4485 | if (m == MATCH_YES) |
4486 | { |
4487 | m = gfc_match_structure_decl (); |
4488 | if (m == MATCH_YES) |
4489 | { |
4490 | /* gfc_new_block is updated by match_structure_decl. */ |
4491 | ts->type = BT_DERIVED; |
4492 | ts->u.derived = gfc_new_block; |
4493 | return MATCH_YES; |
4494 | } |
4495 | } |
4496 | if (m == MATCH_ERROR) |
4497 | return MATCH_ERROR; |
4498 | } |
4499 | |
4500 | /* Match CLASS declarations. */ |
4501 | m = gfc_match (" class ( * )" ); |
4502 | if (m == MATCH_ERROR) |
4503 | return MATCH_ERROR; |
4504 | else if (m == MATCH_YES) |
4505 | { |
4506 | gfc_symbol *upe; |
4507 | gfc_symtree *st; |
4508 | ts->type = BT_CLASS; |
4509 | gfc_find_symbol ("STAR" , gfc_current_ns, 1, &upe); |
4510 | if (upe == NULL) |
4511 | { |
4512 | upe = gfc_new_symbol ("STAR" , gfc_current_ns); |
4513 | st = gfc_new_symtree (&gfc_current_ns->sym_root, "STAR" ); |
4514 | st->n.sym = upe; |
4515 | gfc_set_sym_referenced (upe); |
4516 | upe->refs++; |
4517 | upe->ts.type = BT_VOID; |
4518 | upe->attr.unlimited_polymorphic = 1; |
4519 | /* This is essential to force the construction of |
4520 | unlimited polymorphic component class containers. */ |
4521 | upe->attr.zero_comp = 1; |
4522 | if (!gfc_add_flavor (&upe->attr, FL_DERIVED, NULL, |
4523 | &gfc_current_locus)) |
4524 | return MATCH_ERROR; |
4525 | } |
4526 | else |
4527 | { |
4528 | st = gfc_get_tbp_symtree (&gfc_current_ns->sym_root, "STAR" ); |
4529 | st->n.sym = upe; |
4530 | upe->refs++; |
4531 | } |
4532 | ts->u.derived = upe; |
4533 | return m; |
4534 | } |
4535 | |
4536 | m = gfc_match (" class (" ); |
4537 | |
4538 | if (m == MATCH_YES) |
4539 | m = gfc_match ("%n" , name); |
4540 | else |
4541 | return m; |
4542 | |
4543 | if (m != MATCH_YES) |
4544 | return m; |
4545 | ts->type = BT_CLASS; |
4546 | |
4547 | if (!gfc_notify_std (GFC_STD_F2003, "CLASS statement at %C" )) |
4548 | return MATCH_ERROR; |
4549 | |
4550 | m = gfc_match_actual_arglist (1, &decl_type_param_list, true); |
4551 | if (m == MATCH_ERROR) |
4552 | return m; |
4553 | |
4554 | m = gfc_match_char (')'); |
4555 | if (m != MATCH_YES) |
4556 | return m; |
4557 | } |
4558 | |
4559 | /* Defer association of the derived type until the end of the |
4560 | specification block. However, if the derived type can be |
4561 | found, add it to the typespec. */ |
4562 | if (gfc_matching_function) |
4563 | { |
4564 | ts->u.derived = NULL; |
4565 | if (gfc_current_state () != COMP_INTERFACE |
4566 | && !gfc_find_symbol (name, NULL, 1, &sym) && sym) |
4567 | { |
4568 | sym = gfc_find_dt_in_generic (sym); |
4569 | ts->u.derived = sym; |
4570 | } |
4571 | return MATCH_YES; |
4572 | } |
4573 | |
4574 | /* Search for the name but allow the components to be defined later. If |
4575 | type = -1, this typespec has been seen in a function declaration but |
4576 | the type could not be accessed at that point. The actual derived type is |
4577 | stored in a symtree with the first letter of the name capitalized; the |
4578 | symtree with the all lower-case name contains the associated |
4579 | generic function. */ |
4580 | dt_name = gfc_dt_upper_string (name); |
4581 | sym = NULL; |
4582 | dt_sym = NULL; |
4583 | if (ts->kind != -1) |
4584 | { |
4585 | gfc_get_ha_symbol (name, &sym); |
4586 | if (sym->generic && gfc_find_symbol (dt_name, NULL, 0, &dt_sym)) |
4587 | { |
4588 | gfc_error ("Type name %qs at %C is ambiguous" , name); |
4589 | return MATCH_ERROR; |
4590 | } |
4591 | if (sym->generic && !dt_sym) |
4592 | dt_sym = gfc_find_dt_in_generic (sym); |
4593 | |
4594 | /* Host associated PDTs can get confused with their constructors |
4595 | because they ar instantiated in the template's namespace. */ |
4596 | if (!dt_sym) |
4597 | { |
4598 | if (gfc_find_symbol (dt_name, NULL, 1, &dt_sym)) |
4599 | { |
4600 | gfc_error ("Type name %qs at %C is ambiguous" , name); |
4601 | return MATCH_ERROR; |
4602 | } |
4603 | if (dt_sym && !dt_sym->attr.pdt_type) |
4604 | dt_sym = NULL; |
4605 | } |
4606 | } |
4607 | else if (ts->kind == -1) |
4608 | { |
4609 | int iface = gfc_state_stack->previous->state != COMP_INTERFACE |
4610 | || gfc_current_ns->has_import_set; |
4611 | gfc_find_symbol (name, NULL, iface, &sym); |
4612 | if (sym && sym->generic && gfc_find_symbol (dt_name, NULL, 1, &dt_sym)) |
4613 | { |
4614 | gfc_error ("Type name %qs at %C is ambiguous" , name); |
4615 | return MATCH_ERROR; |
4616 | } |
4617 | if (sym && sym->generic && !dt_sym) |
4618 | dt_sym = gfc_find_dt_in_generic (sym); |
4619 | |
4620 | ts->kind = 0; |
4621 | if (sym == NULL) |
4622 | return MATCH_NO; |
4623 | } |
4624 | |
4625 | if ((sym->attr.flavor != FL_UNKNOWN && sym->attr.flavor != FL_STRUCT |
4626 | && !(sym->attr.flavor == FL_PROCEDURE && sym->attr.generic)) |
4627 | || sym->attr.subroutine) |
4628 | { |
4629 | gfc_error ("Type name %qs at %C conflicts with previously declared " |
4630 | "entity at %L, which has the same name" , name, |
4631 | &sym->declared_at); |
4632 | return MATCH_ERROR; |
4633 | } |
4634 | |
4635 | if (sym && sym->attr.flavor == FL_DERIVED |
4636 | && sym->attr.pdt_template |
4637 | && gfc_current_state () != COMP_DERIVED) |
4638 | { |
4639 | m = gfc_get_pdt_instance (param_list: decl_type_param_list, sym: &sym, NULL); |
4640 | if (m != MATCH_YES) |
4641 | return m; |
4642 | gcc_assert (!sym->attr.pdt_template && sym->attr.pdt_type); |
4643 | ts->u.derived = sym; |
4644 | strcpy (dest: name, src: gfc_dt_lower_string (sym->name)); |
4645 | } |
4646 | |
4647 | gfc_save_symbol_data (sym); |
4648 | gfc_set_sym_referenced (sym); |
4649 | if (!sym->attr.generic |
4650 | && !gfc_add_generic (&sym->attr, sym->name, NULL)) |
4651 | return MATCH_ERROR; |
4652 | |
4653 | if (!sym->attr.function |
4654 | && !gfc_add_function (&sym->attr, sym->name, NULL)) |
4655 | return MATCH_ERROR; |
4656 | |
4657 | if (dt_sym && dt_sym->attr.flavor == FL_DERIVED |
4658 | && dt_sym->attr.pdt_template |
4659 | && gfc_current_state () != COMP_DERIVED) |
4660 | { |
4661 | m = gfc_get_pdt_instance (param_list: decl_type_param_list, sym: &dt_sym, NULL); |
4662 | if (m != MATCH_YES) |
4663 | return m; |
4664 | gcc_assert (!dt_sym->attr.pdt_template && dt_sym->attr.pdt_type); |
4665 | } |
4666 | |
4667 | if (!dt_sym) |
4668 | { |
4669 | gfc_interface *intr, *head; |
4670 | |
4671 | /* Use upper case to save the actual derived-type symbol. */ |
4672 | gfc_get_symbol (dt_name, NULL, &dt_sym); |
4673 | dt_sym->name = gfc_get_string ("%s" , sym->name); |
4674 | head = sym->generic; |
4675 | intr = gfc_get_interface (); |
4676 | intr->sym = dt_sym; |
4677 | intr->where = gfc_current_locus; |
4678 | intr->next = head; |
4679 | sym->generic = intr; |
4680 | sym->attr.if_source = IFSRC_DECL; |
4681 | } |
4682 | else |
4683 | gfc_save_symbol_data (dt_sym); |
4684 | |
4685 | gfc_set_sym_referenced (dt_sym); |
4686 | |
4687 | if (dt_sym->attr.flavor != FL_DERIVED && dt_sym->attr.flavor != FL_STRUCT |
4688 | && !gfc_add_flavor (&dt_sym->attr, FL_DERIVED, sym->name, NULL)) |
4689 | return MATCH_ERROR; |
4690 | |
4691 | ts->u.derived = dt_sym; |
4692 | |
4693 | return MATCH_YES; |
4694 | |
4695 | get_kind: |
4696 | if (matched_type |
4697 | && !gfc_notify_std (GFC_STD_F2008, "TYPE with " |
4698 | "intrinsic-type-spec at %C" )) |
4699 | return MATCH_ERROR; |
4700 | |
4701 | /* For all types except double, derived and character, look for an |
4702 | optional kind specifier. MATCH_NO is actually OK at this point. */ |
4703 | if (implicit_flag == 1) |
4704 | { |
4705 | if (matched_type && gfc_match_char (')') != MATCH_YES) |
4706 | return MATCH_ERROR; |
4707 | |
4708 | return MATCH_YES; |
4709 | } |
4710 | |
4711 | if (gfc_current_form == FORM_FREE) |
4712 | { |
4713 | c = gfc_peek_ascii_char (); |
4714 | if (!gfc_is_whitespace (c) && c != '*' && c != '(' |
4715 | && c != ':' && c != ',') |
4716 | { |
4717 | if (matched_type && c == ')') |
4718 | { |
4719 | gfc_next_ascii_char (); |
4720 | return MATCH_YES; |
4721 | } |
4722 | gfc_error ("Malformed type-spec at %C" ); |
4723 | return MATCH_NO; |
4724 | } |
4725 | } |
4726 | |
4727 | m = gfc_match_kind_spec (ts, kind_expr_only: false); |
4728 | if (m == MATCH_ERROR) |
4729 | return MATCH_ERROR; |
4730 | |
4731 | if (m == MATCH_NO && ts->type != BT_CHARACTER) |
4732 | { |
4733 | m = gfc_match_old_kind_spec (ts); |
4734 | if (gfc_validate_kind (ts->type, ts->kind, true) == -1) |
4735 | return MATCH_ERROR; |
4736 | } |
4737 | |
4738 | if (matched_type && gfc_match_char (')') != MATCH_YES) |
4739 | { |
4740 | gfc_error ("Malformed type-spec at %C" ); |
4741 | return MATCH_ERROR; |
4742 | } |
4743 | |
4744 | /* Defer association of the KIND expression of function results |
4745 | until after USE and IMPORT statements. */ |
4746 | if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ()) |
4747 | || gfc_matching_function) |
4748 | return MATCH_YES; |
4749 | |
4750 | if (m == MATCH_NO) |
4751 | m = MATCH_YES; /* No kind specifier found. */ |
4752 | |
4753 | return m; |
4754 | } |
4755 | |
4756 | |
4757 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
4758 | already matched in parse.cc, or we would not end up here in the |
4759 | first place. So the only thing we need to check, is if there is |
4760 | trailing garbage. If not, the match is successful. */ |
4761 | |
4762 | match |
4763 | gfc_match_implicit_none (void) |
4764 | { |
4765 | char c; |
4766 | match m; |
4767 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
4768 | bool type = false; |
4769 | bool external = false; |
4770 | locus cur_loc = gfc_current_locus; |
4771 | |
4772 | if (gfc_current_ns->seen_implicit_none |
4773 | || gfc_current_ns->has_implicit_none_export) |
4774 | { |
4775 | gfc_error ("Duplicate IMPLICIT NONE statement at %C" ); |
4776 | return MATCH_ERROR; |
4777 | } |
4778 | |
4779 | gfc_gobble_whitespace (); |
4780 | c = gfc_peek_ascii_char (); |
4781 | if (c == '(') |
4782 | { |
4783 | (void) gfc_next_ascii_char (); |
4784 | if (!gfc_notify_std (GFC_STD_F2018, "IMPLICIT NONE with spec list at %C" )) |
4785 | return MATCH_ERROR; |
4786 | |
4787 | gfc_gobble_whitespace (); |
4788 | if (gfc_peek_ascii_char () == ')') |
4789 | { |
4790 | (void) gfc_next_ascii_char (); |
4791 | type = true; |
4792 | } |
4793 | else |
4794 | for(;;) |
4795 | { |
4796 | m = gfc_match (" %n" , name); |
4797 | if (m != MATCH_YES) |
4798 | return MATCH_ERROR; |
4799 | |
4800 | if (strcmp (s1: name, s2: "type" ) == 0) |
4801 | type = true; |
4802 | else if (strcmp (s1: name, s2: "external" ) == 0) |
4803 | external = true; |
4804 | else |
4805 | return MATCH_ERROR; |
4806 | |
4807 | gfc_gobble_whitespace (); |
4808 | c = gfc_next_ascii_char (); |
4809 | if (c == ',') |
4810 | continue; |
4811 | if (c == ')') |
4812 | break; |
4813 | return MATCH_ERROR; |
4814 | } |
4815 | } |
4816 | else |
4817 | type = true; |
4818 | |
4819 | if (gfc_match_eos () != MATCH_YES) |
4820 | return MATCH_ERROR; |
4821 | |
4822 | gfc_set_implicit_none (type, external, &cur_loc); |
4823 | |
4824 | return MATCH_YES; |
4825 | } |
4826 | |
4827 | |
4828 | /* Match the letter range(s) of an IMPLICIT statement. */ |
4829 | |
4830 | static match |
4831 | match_implicit_range (void) |
4832 | { |
4833 | char c, c1, c2; |
4834 | int inner; |
4835 | locus cur_loc; |
4836 | |
4837 | cur_loc = gfc_current_locus; |
4838 | |
4839 | gfc_gobble_whitespace (); |
4840 | c = gfc_next_ascii_char (); |
4841 | if (c != '(') |
4842 | { |
4843 | gfc_error ("Missing character range in IMPLICIT at %C" ); |
4844 | goto bad; |
4845 | } |
4846 | |
4847 | inner = 1; |
4848 | while (inner) |
4849 | { |
4850 | gfc_gobble_whitespace (); |
4851 | c1 = gfc_next_ascii_char (); |
4852 | if (!ISALPHA (c1)) |
4853 | goto bad; |
4854 | |
4855 | gfc_gobble_whitespace (); |
4856 | c = gfc_next_ascii_char (); |
4857 | |
4858 | switch (c) |
4859 | { |
4860 | case ')': |
4861 | inner = 0; /* Fall through. */ |
4862 | |
4863 | case ',': |
4864 | c2 = c1; |
4865 | break; |
4866 | |
4867 | case '-': |
4868 | gfc_gobble_whitespace (); |
4869 | c2 = gfc_next_ascii_char (); |
4870 | if (!ISALPHA (c2)) |
4871 | goto bad; |
4872 | |
4873 | gfc_gobble_whitespace (); |
4874 | c = gfc_next_ascii_char (); |
4875 | |
4876 | if ((c != ',') && (c != ')')) |
4877 | goto bad; |
4878 | if (c == ')') |
4879 | inner = 0; |
4880 | |
4881 | break; |
4882 | |
4883 | default: |
4884 | goto bad; |
4885 | } |
4886 | |
4887 | if (c1 > c2) |
4888 | { |
4889 | gfc_error ("Letters must be in alphabetic order in " |
4890 | "IMPLICIT statement at %C" ); |
4891 | goto bad; |
4892 | } |
4893 | |
4894 | /* See if we can add the newly matched range to the pending |
4895 | implicits from this IMPLICIT statement. We do not check for |
4896 | conflicts with whatever earlier IMPLICIT statements may have |
4897 | set. This is done when we've successfully finished matching |
4898 | the current one. */ |
4899 | if (!gfc_add_new_implicit_range (c1, c2)) |
4900 | goto bad; |
4901 | } |
4902 | |
4903 | return MATCH_YES; |
4904 | |
4905 | bad: |
4906 | gfc_syntax_error (ST_IMPLICIT); |
4907 | |
4908 | gfc_current_locus = cur_loc; |
4909 | return MATCH_ERROR; |
4910 | } |
4911 | |
4912 | |
4913 | /* Match an IMPLICIT statement, storing the types for |
4914 | gfc_set_implicit() if the statement is accepted by the parser. |
4915 | There is a strange looking, but legal syntactic construction |
4916 | possible. It looks like: |
4917 | |
4918 | IMPLICIT INTEGER (a-b) (c-d) |
4919 | |
4920 | This is legal if "a-b" is a constant expression that happens to |
4921 | equal one of the legal kinds for integers. The real problem |
4922 | happens with an implicit specification that looks like: |
4923 | |
4924 | IMPLICIT INTEGER (a-b) |
4925 | |
4926 | In this case, a typespec matcher that is "greedy" (as most of the |
4927 | matchers are) gobbles the character range as a kindspec, leaving |
4928 | nothing left. We therefore have to go a bit more slowly in the |
4929 | matching process by inhibiting the kindspec checking during |
4930 | typespec matching and checking for a kind later. */ |
4931 | |
4932 | match |
4933 | gfc_match_implicit (void) |
4934 | { |
4935 | gfc_typespec ts; |
4936 | locus cur_loc; |
4937 | char c; |
4938 | match m; |
4939 | |
4940 | if (gfc_current_ns->seen_implicit_none) |
4941 | { |
4942 | gfc_error ("IMPLICIT statement at %C following an IMPLICIT NONE (type) " |
4943 | "statement" ); |
4944 | return MATCH_ERROR; |
4945 | } |
4946 | |
4947 | gfc_clear_ts (&ts); |
4948 | |
4949 | /* We don't allow empty implicit statements. */ |
4950 | if (gfc_match_eos () == MATCH_YES) |
4951 | { |
4952 | gfc_error ("Empty IMPLICIT statement at %C" ); |
4953 | return MATCH_ERROR; |
4954 | } |
4955 | |
4956 | do |
4957 | { |
4958 | /* First cleanup. */ |
4959 | gfc_clear_new_implicit (); |
4960 | |
4961 | /* A basic type is mandatory here. */ |
4962 | m = gfc_match_decl_type_spec (ts: &ts, implicit_flag: 1); |
4963 | if (m == MATCH_ERROR) |
4964 | goto error; |
4965 | if (m == MATCH_NO) |
4966 | goto syntax; |
4967 | |
4968 | cur_loc = gfc_current_locus; |
4969 | m = match_implicit_range (); |
4970 | |
4971 | if (m == MATCH_YES) |
4972 | { |
4973 | /* We may have <TYPE> (<RANGE>). */ |
4974 | gfc_gobble_whitespace (); |
4975 | c = gfc_peek_ascii_char (); |
4976 | if (c == ',' || c == '\n' || c == ';' || c == '!') |
4977 | { |
4978 | /* Check for CHARACTER with no length parameter. */ |
4979 | if (ts.type == BT_CHARACTER && !ts.u.cl) |
4980 | { |
4981 | ts.kind = gfc_default_character_kind; |
4982 | ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
4983 | ts.u.cl->length = gfc_get_int_expr (gfc_charlen_int_kind, |
4984 | NULL, 1); |
4985 | } |
4986 | |
4987 | /* Record the Successful match. */ |
4988 | if (!gfc_merge_new_implicit (&ts)) |
4989 | return MATCH_ERROR; |
4990 | if (c == ',') |
4991 | c = gfc_next_ascii_char (); |
4992 | else if (gfc_match_eos () == MATCH_ERROR) |
4993 | goto error; |
4994 | continue; |
4995 | } |
4996 | |
4997 | gfc_current_locus = cur_loc; |
4998 | } |
4999 | |
5000 | /* Discard the (incorrectly) matched range. */ |
5001 | gfc_clear_new_implicit (); |
5002 | |
5003 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ |
5004 | if (ts.type == BT_CHARACTER) |
5005 | m = gfc_match_char_spec (ts: &ts); |
5006 | else if (gfc_numeric_ts(&ts) || ts.type == BT_LOGICAL) |
5007 | { |
5008 | m = gfc_match_kind_spec (ts: &ts, kind_expr_only: false); |
5009 | if (m == MATCH_NO) |
5010 | { |
5011 | m = gfc_match_old_kind_spec (ts: &ts); |
5012 | if (m == MATCH_ERROR) |
5013 | goto error; |
5014 | if (m == MATCH_NO) |
5015 | goto syntax; |
5016 | } |
5017 | } |
5018 | if (m == MATCH_ERROR) |
5019 | goto error; |
5020 | |
5021 | m = match_implicit_range (); |
5022 | if (m == MATCH_ERROR) |
5023 | goto error; |
5024 | if (m == MATCH_NO) |
5025 | goto syntax; |
5026 | |
5027 | gfc_gobble_whitespace (); |
5028 | c = gfc_next_ascii_char (); |
5029 | if (c != ',' && gfc_match_eos () != MATCH_YES) |
5030 | goto syntax; |
5031 | |
5032 | if (!gfc_merge_new_implicit (&ts)) |
5033 | return MATCH_ERROR; |
5034 | } |
5035 | while (c == ','); |
5036 | |
5037 | return MATCH_YES; |
5038 | |
5039 | syntax: |
5040 | gfc_syntax_error (ST_IMPLICIT); |
5041 | |
5042 | error: |
5043 | return MATCH_ERROR; |
5044 | } |
5045 | |
5046 | |
5047 | match |
5048 | gfc_match_import (void) |
5049 | { |
5050 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
5051 | match m; |
5052 | gfc_symbol *sym; |
5053 | gfc_symtree *st; |
5054 | |
5055 | if (gfc_current_ns->proc_name == NULL |
5056 | || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) |
5057 | { |
5058 | gfc_error ("IMPORT statement at %C only permitted in " |
5059 | "an INTERFACE body" ); |
5060 | return MATCH_ERROR; |
5061 | } |
5062 | |
5063 | if (gfc_current_ns->proc_name->attr.module_procedure) |
5064 | { |
5065 | gfc_error ("F2008: C1210 IMPORT statement at %C is not permitted " |
5066 | "in a module procedure interface body" ); |
5067 | return MATCH_ERROR; |
5068 | } |
5069 | |
5070 | if (!gfc_notify_std (GFC_STD_F2003, "IMPORT statement at %C" )) |
5071 | return MATCH_ERROR; |
5072 | |
5073 | if (gfc_match_eos () == MATCH_YES) |
5074 | { |
5075 | /* All host variables should be imported. */ |
5076 | gfc_current_ns->has_import_set = 1; |
5077 | return MATCH_YES; |
5078 | } |
5079 | |
5080 | if (gfc_match (" ::" ) == MATCH_YES) |
5081 | { |
5082 | if (gfc_match_eos () == MATCH_YES) |
5083 | { |
5084 | gfc_error ("Expecting list of named entities at %C" ); |
5085 | return MATCH_ERROR; |
5086 | } |
5087 | } |
5088 | |
5089 | for(;;) |
5090 | { |
5091 | sym = NULL; |
5092 | m = gfc_match (" %n" , name); |
5093 | switch (m) |
5094 | { |
5095 | case MATCH_YES: |
5096 | if (gfc_current_ns->parent != NULL |
5097 | && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym)) |
5098 | { |
5099 | gfc_error ("Type name %qs at %C is ambiguous" , name); |
5100 | return MATCH_ERROR; |
5101 | } |
5102 | else if (!sym && gfc_current_ns->proc_name->ns->parent != NULL |
5103 | && gfc_find_symbol (name, |
5104 | gfc_current_ns->proc_name->ns->parent, |
5105 | 1, &sym)) |
5106 | { |
5107 | gfc_error ("Type name %qs at %C is ambiguous" , name); |
5108 | return MATCH_ERROR; |
5109 | } |
5110 | |
5111 | if (sym == NULL) |
5112 | { |
5113 | gfc_error ("Cannot IMPORT %qs from host scoping unit " |
5114 | "at %C - does not exist." , name); |
5115 | return MATCH_ERROR; |
5116 | } |
5117 | |
5118 | if (gfc_find_symtree (gfc_current_ns->sym_root, name)) |
5119 | { |
5120 | gfc_warning (opt: 0, "%qs is already IMPORTed from host scoping unit " |
5121 | "at %C" , name); |
5122 | goto next_item; |
5123 | } |
5124 | |
5125 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); |
5126 | st->n.sym = sym; |
5127 | sym->refs++; |
5128 | sym->attr.imported = 1; |
5129 | |
5130 | if (sym->attr.generic && (sym = gfc_find_dt_in_generic (sym))) |
5131 | { |
5132 | /* The actual derived type is stored in a symtree with the first |
5133 | letter of the name capitalized; the symtree with the all |
5134 | lower-case name contains the associated generic function. */ |
5135 | st = gfc_new_symtree (&gfc_current_ns->sym_root, |
5136 | gfc_dt_upper_string (name)); |
5137 | st->n.sym = sym; |
5138 | sym->refs++; |
5139 | sym->attr.imported = 1; |
5140 | } |
5141 | |
5142 | goto next_item; |
5143 | |
5144 | case MATCH_NO: |
5145 | break; |
5146 | |
5147 | case MATCH_ERROR: |
5148 | return MATCH_ERROR; |
5149 | } |
5150 | |
5151 | next_item: |
5152 | if (gfc_match_eos () == MATCH_YES) |
5153 | break; |
5154 | if (gfc_match_char (',') != MATCH_YES) |
5155 | goto syntax; |
5156 | } |
5157 | |
5158 | return MATCH_YES; |
5159 | |
5160 | syntax: |
5161 | gfc_error ("Syntax error in IMPORT statement at %C" ); |
5162 | return MATCH_ERROR; |
5163 | } |
5164 | |
5165 | |
5166 | /* A minimal implementation of gfc_match without whitespace, escape |
5167 | characters or variable arguments. Returns true if the next |
5168 | characters match the TARGET template exactly. */ |
5169 | |
5170 | static bool |
5171 | match_string_p (const char *target) |
5172 | { |
5173 | const char *p; |
5174 | |
5175 | for (p = target; *p; p++) |
5176 | if ((char) gfc_next_ascii_char () != *p) |
5177 | return false; |
5178 | return true; |
5179 | } |
5180 | |
5181 | /* Matches an attribute specification including array specs. If |
5182 | successful, leaves the variables current_attr and current_as |
5183 | holding the specification. Also sets the colon_seen variable for |
5184 | later use by matchers associated with initializations. |
5185 | |
5186 | This subroutine is a little tricky in the sense that we don't know |
5187 | if we really have an attr-spec until we hit the double colon. |
5188 | Until that time, we can only return MATCH_NO. This forces us to |
5189 | check for duplicate specification at this level. */ |
5190 | |
5191 | static match |
5192 | match_attr_spec (void) |
5193 | { |
5194 | /* Modifiers that can exist in a type statement. */ |
5195 | enum |
5196 | { GFC_DECL_BEGIN = 0, DECL_ALLOCATABLE = GFC_DECL_BEGIN, |
5197 | DECL_IN = INTENT_IN, DECL_OUT = INTENT_OUT, DECL_INOUT = INTENT_INOUT, |
5198 | DECL_DIMENSION, DECL_EXTERNAL, |
5199 | DECL_INTRINSIC, DECL_OPTIONAL, |
5200 | DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE, |
5201 | DECL_STATIC, DECL_AUTOMATIC, |
5202 | DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE, |
5203 | DECL_IS_BIND_C, DECL_CODIMENSION, DECL_ASYNCHRONOUS, DECL_CONTIGUOUS, |
5204 | DECL_LEN, DECL_KIND, DECL_NONE, GFC_DECL_END /* Sentinel */ |
5205 | }; |
5206 | |
5207 | /* GFC_DECL_END is the sentinel, index starts at 0. */ |
5208 | #define NUM_DECL GFC_DECL_END |
5209 | |
5210 | /* Make sure that values from sym_intent are safe to be used here. */ |
5211 | gcc_assert (INTENT_IN > 0); |
5212 | |
5213 | locus start, seen_at[NUM_DECL]; |
5214 | int seen[NUM_DECL]; |
5215 | unsigned int d; |
5216 | const char *attr; |
5217 | match m; |
5218 | bool t; |
5219 | |
5220 | gfc_clear_attr (¤t_attr); |
5221 | start = gfc_current_locus; |
5222 | |
5223 | current_as = NULL; |
5224 | colon_seen = 0; |
5225 | attr_seen = 0; |
5226 | |
5227 | /* See if we get all of the keywords up to the final double colon. */ |
5228 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) |
5229 | seen[d] = 0; |
5230 | |
5231 | for (;;) |
5232 | { |
5233 | char ch; |
5234 | |
5235 | d = DECL_NONE; |
5236 | gfc_gobble_whitespace (); |
5237 | |
5238 | ch = gfc_next_ascii_char (); |
5239 | if (ch == ':') |
5240 | { |
5241 | /* This is the successful exit condition for the loop. */ |
5242 | if (gfc_next_ascii_char () == ':') |
5243 | break; |
5244 | } |
5245 | else if (ch == ',') |
5246 | { |
5247 | gfc_gobble_whitespace (); |
5248 | switch (gfc_peek_ascii_char ()) |
5249 | { |
5250 | case 'a': |
5251 | gfc_next_ascii_char (); |
5252 | switch (gfc_next_ascii_char ()) |
5253 | { |
5254 | case 'l': |
5255 | if (match_string_p (target: "locatable" )) |
5256 | { |
5257 | /* Matched "allocatable". */ |
5258 | d = DECL_ALLOCATABLE; |
5259 | } |
5260 | break; |
5261 | |
5262 | case 's': |
5263 | if (match_string_p (target: "ynchronous" )) |
5264 | { |
5265 | /* Matched "asynchronous". */ |
5266 | d = DECL_ASYNCHRONOUS; |
5267 | } |
5268 | break; |
5269 | |
5270 | case 'u': |
5271 | if (match_string_p (target: "tomatic" )) |
5272 | { |
5273 | /* Matched "automatic". */ |
5274 | d = DECL_AUTOMATIC; |
5275 | } |
5276 | break; |
5277 | } |
5278 | break; |
5279 | |
5280 | case 'b': |
5281 | /* Try and match the bind(c). */ |
5282 | m = gfc_match_bind_c (NULL, true); |
5283 | if (m == MATCH_YES) |
5284 | d = DECL_IS_BIND_C; |
5285 | else if (m == MATCH_ERROR) |
5286 | goto cleanup; |
5287 | break; |
5288 | |
5289 | case 'c': |
5290 | gfc_next_ascii_char (); |
5291 | if ('o' != gfc_next_ascii_char ()) |
5292 | break; |
5293 | switch (gfc_next_ascii_char ()) |
5294 | { |
5295 | case 'd': |
5296 | if (match_string_p (target: "imension" )) |
5297 | { |
5298 | d = DECL_CODIMENSION; |
5299 | break; |
5300 | } |
5301 | /* FALLTHRU */ |
5302 | case 'n': |
5303 | if (match_string_p (target: "tiguous" )) |
5304 | { |
5305 | d = DECL_CONTIGUOUS; |
5306 | break; |
5307 | } |
5308 | } |
5309 | break; |
5310 | |
5311 | case 'd': |
5312 | if (match_string_p (target: "dimension" )) |
5313 | d = DECL_DIMENSION; |
5314 | break; |
5315 | |
5316 | case 'e': |
5317 | if (match_string_p (target: "external" )) |
5318 | d = DECL_EXTERNAL; |
5319 | break; |
5320 | |
5321 | case 'i': |
5322 | if (match_string_p (target: "int" )) |
5323 | { |
5324 | ch = gfc_next_ascii_char (); |
5325 | if (ch == 'e') |
5326 | { |
5327 | if (match_string_p (target: "nt" )) |
5328 | { |
5329 | /* Matched "intent". */ |
5330 | d = match_intent_spec (); |
5331 | if (d == INTENT_UNKNOWN) |
5332 | { |
5333 | m = MATCH_ERROR; |
5334 | goto cleanup; |
5335 | } |
5336 | } |
5337 | } |
5338 | else if (ch == 'r') |
5339 | { |
5340 | if (match_string_p (target: "insic" )) |
5341 | { |
5342 | /* Matched "intrinsic". */ |
5343 | d = DECL_INTRINSIC; |
5344 | } |
5345 | } |
5346 | } |
5347 | break; |
5348 | |
5349 | case 'k': |
5350 | if (match_string_p (target: "kind" )) |
5351 | d = DECL_KIND; |
5352 | break; |
5353 | |
5354 | case 'l': |
5355 | if (match_string_p (target: "len" )) |
5356 | d = DECL_LEN; |
5357 | break; |
5358 | |
5359 | case 'o': |
5360 | if (match_string_p (target: "optional" )) |
5361 | d = DECL_OPTIONAL; |
5362 | break; |
5363 | |
5364 | case 'p': |
5365 | gfc_next_ascii_char (); |
5366 | switch (gfc_next_ascii_char ()) |
5367 | { |
5368 | case 'a': |
5369 | if (match_string_p (target: "rameter" )) |
5370 | { |
5371 | /* Matched "parameter". */ |
5372 | d = DECL_PARAMETER; |
5373 | } |
5374 | break; |
5375 | |
5376 | case 'o': |
5377 | if (match_string_p (target: "inter" )) |
5378 | { |
5379 | /* Matched "pointer". */ |
5380 | d = DECL_POINTER; |
5381 | } |
5382 | break; |
5383 | |
5384 | case 'r': |
5385 | ch = gfc_next_ascii_char (); |
5386 | if (ch == 'i') |
5387 | { |
5388 | if (match_string_p (target: "vate" )) |
5389 | { |
5390 | /* Matched "private". */ |
5391 | d = DECL_PRIVATE; |
5392 | } |
5393 | } |
5394 | else if (ch == 'o') |
5395 | { |
5396 | if (match_string_p (target: "tected" )) |
5397 | { |
5398 | /* Matched "protected". */ |
5399 | d = DECL_PROTECTED; |
5400 | } |
5401 | } |
5402 | break; |
5403 | |
5404 | case 'u': |
5405 | if (match_string_p (target: "blic" )) |
5406 | { |
5407 | /* Matched "public". */ |
5408 | d = DECL_PUBLIC; |
5409 | } |
5410 | break; |
5411 | } |
5412 | break; |
5413 | |
5414 | case 's': |
5415 | gfc_next_ascii_char (); |
5416 | switch (gfc_next_ascii_char ()) |
5417 | { |
5418 | case 'a': |
5419 | if (match_string_p (target: "ve" )) |
5420 | { |
5421 | /* Matched "save". */ |
5422 | d = DECL_SAVE; |
5423 | } |
5424 | break; |
5425 | |
5426 | case 't': |
5427 | if (match_string_p (target: "atic" )) |
5428 | { |
5429 | /* Matched "static". */ |
5430 | d = DECL_STATIC; |
5431 | } |
5432 | break; |
5433 | } |
5434 | break; |
5435 | |
5436 | case 't': |
5437 | if (match_string_p (target: "target" )) |
5438 | d = DECL_TARGET; |
5439 | break; |
5440 | |
5441 | case 'v': |
5442 | gfc_next_ascii_char (); |
5443 | ch = gfc_next_ascii_char (); |
5444 | if (ch == 'a') |
5445 | { |
5446 | if (match_string_p (target: "lue" )) |
5447 | { |
5448 | /* Matched "value". */ |
5449 | d = DECL_VALUE; |
5450 | } |
5451 | } |
5452 | else if (ch == 'o') |
5453 | { |
5454 | if (match_string_p (target: "latile" )) |
5455 | { |
5456 | /* Matched "volatile". */ |
5457 | d = DECL_VOLATILE; |
5458 | } |
5459 | } |
5460 | break; |
5461 | } |
5462 | } |
5463 | |
5464 | /* No double colon and no recognizable decl_type, so assume that |
5465 | we've been looking at something else the whole time. */ |
5466 | if (d == DECL_NONE) |
5467 | { |
5468 | m = MATCH_NO; |
5469 | goto cleanup; |
5470 | } |
5471 | |
5472 | /* Check to make sure any parens are paired up correctly. */ |
5473 | if (gfc_match_parens () == MATCH_ERROR) |
5474 | { |
5475 | m = MATCH_ERROR; |
5476 | goto cleanup; |
5477 | } |
5478 | |
5479 | seen[d]++; |
5480 | seen_at[d] = gfc_current_locus; |
5481 | |
5482 | if (d == DECL_DIMENSION || d == DECL_CODIMENSION) |
5483 | { |
5484 | gfc_array_spec *as = NULL; |
5485 | |
5486 | m = gfc_match_array_spec (&as, d == DECL_DIMENSION, |
5487 | d == DECL_CODIMENSION); |
5488 | |
5489 | if (current_as == NULL) |
5490 | current_as = as; |
5491 | else if (m == MATCH_YES) |
5492 | { |
5493 | if (!merge_array_spec (from: as, to: current_as, copy: false)) |
5494 | m = MATCH_ERROR; |
5495 | free (ptr: as); |
5496 | } |
5497 | |
5498 | if (m == MATCH_NO) |
5499 | { |
5500 | if (d == DECL_CODIMENSION) |
5501 | gfc_error ("Missing codimension specification at %C" ); |
5502 | else |
5503 | gfc_error ("Missing dimension specification at %C" ); |
5504 | m = MATCH_ERROR; |
5505 | } |
5506 | |
5507 | if (m == MATCH_ERROR) |
5508 | goto cleanup; |
5509 | } |
5510 | } |
5511 | |
5512 | /* Since we've seen a double colon, we have to be looking at an |
5513 | attr-spec. This means that we can now issue errors. */ |
5514 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) |
5515 | if (seen[d] > 1) |
5516 | { |
5517 | switch (d) |
5518 | { |
5519 | case DECL_ALLOCATABLE: |
5520 | attr = "ALLOCATABLE" ; |
5521 | break; |
5522 | case DECL_ASYNCHRONOUS: |
5523 | attr = "ASYNCHRONOUS" ; |
5524 | break; |
5525 | case DECL_CODIMENSION: |
5526 | attr = "CODIMENSION" ; |
5527 | break; |
5528 | case DECL_CONTIGUOUS: |
5529 | attr = "CONTIGUOUS" ; |
5530 | break; |
5531 | case DECL_DIMENSION: |
5532 | attr = "DIMENSION" ; |
5533 | break; |
5534 | case DECL_EXTERNAL: |
5535 | attr = "EXTERNAL" ; |
5536 | break; |
5537 | case DECL_IN: |
5538 | attr = "INTENT (IN)" ; |
5539 | break; |
5540 | case DECL_OUT: |
5541 | attr = "INTENT (OUT)" ; |
5542 | break; |
5543 | case DECL_INOUT: |
5544 | attr = "INTENT (IN OUT)" ; |
5545 | break; |
5546 | case DECL_INTRINSIC: |
5547 | attr = "INTRINSIC" ; |
5548 | break; |
5549 | case DECL_OPTIONAL: |
5550 | attr = "OPTIONAL" ; |
5551 | break; |
5552 | case DECL_KIND: |
5553 | attr = "KIND" ; |
5554 | break; |
5555 | case DECL_LEN: |
5556 | attr = "LEN" ; |
5557 | break; |
5558 | case DECL_PARAMETER: |
5559 | attr = "PARAMETER" ; |
5560 | break; |
5561 | case DECL_POINTER: |
5562 | attr = "POINTER" ; |
5563 | break; |
5564 | case DECL_PROTECTED: |
5565 | attr = "PROTECTED" ; |
5566 | break; |
5567 | case DECL_PRIVATE: |
5568 | attr = "PRIVATE" ; |
5569 | break; |
5570 | case DECL_PUBLIC: |
5571 | attr = "PUBLIC" ; |
5572 | break; |
5573 | case DECL_SAVE: |
5574 | attr = "SAVE" ; |
5575 | break; |
5576 | case DECL_STATIC: |
5577 | attr = "STATIC" ; |
5578 | break; |
5579 | case DECL_AUTOMATIC: |
5580 | attr = "AUTOMATIC" ; |
5581 | break; |
5582 | case DECL_TARGET: |
5583 | attr = "TARGET" ; |
5584 | break; |
5585 | case DECL_IS_BIND_C: |
5586 | attr = "IS_BIND_C" ; |
5587 | break; |
5588 | case DECL_VALUE: |
5589 | attr = "VALUE" ; |
5590 | break; |
5591 | case DECL_VOLATILE: |
5592 | attr = "VOLATILE" ; |
5593 | break; |
5594 | default: |
5595 | attr = NULL; /* This shouldn't happen. */ |
5596 | } |
5597 | |
5598 | gfc_error ("Duplicate %s attribute at %L" , attr, &seen_at[d]); |
5599 | m = MATCH_ERROR; |
5600 | goto cleanup; |
5601 | } |
5602 | |
5603 | /* Now that we've dealt with duplicate attributes, add the attributes |
5604 | to the current attribute. */ |
5605 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) |
5606 | { |
5607 | if (seen[d] == 0) |
5608 | continue; |
5609 | else |
5610 | attr_seen = 1; |
5611 | |
5612 | if ((d == DECL_STATIC || d == DECL_AUTOMATIC) |
5613 | && !flag_dec_static) |
5614 | { |
5615 | gfc_error ("%s at %L is a DEC extension, enable with " |
5616 | "%<-fdec-static%>" , |
5617 | d == DECL_STATIC ? "STATIC" : "AUTOMATIC" , &seen_at[d]); |
5618 | m = MATCH_ERROR; |
5619 | goto cleanup; |
5620 | } |
5621 | /* Allow SAVE with STATIC, but don't complain. */ |
5622 | if (d == DECL_STATIC && seen[DECL_SAVE]) |
5623 | continue; |
5624 | |
5625 | if (gfc_comp_struct (gfc_current_state ()) |
5626 | && d != DECL_DIMENSION && d != DECL_CODIMENSION |
5627 | && d != DECL_POINTER && d != DECL_PRIVATE |
5628 | && d != DECL_PUBLIC && d != DECL_CONTIGUOUS && d != DECL_NONE) |
5629 | { |
5630 | bool is_derived = gfc_current_state () == COMP_DERIVED; |
5631 | if (d == DECL_ALLOCATABLE) |
5632 | { |
5633 | if (!gfc_notify_std (GFC_STD_F2003, is_derived |
5634 | ? G_("ALLOCATABLE attribute at %C in a " |
5635 | "TYPE definition" ) |
5636 | : G_("ALLOCATABLE attribute at %C in a " |
5637 | "STRUCTURE definition" ))) |
5638 | { |
5639 | m = MATCH_ERROR; |
5640 | goto cleanup; |
5641 | } |
5642 | } |
5643 | else if (d == DECL_KIND) |
5644 | { |
5645 | if (!gfc_notify_std (GFC_STD_F2003, is_derived |
5646 | ? G_("KIND attribute at %C in a " |
5647 | "TYPE definition" ) |
5648 | : G_("KIND attribute at %C in a " |
5649 | "STRUCTURE definition" ))) |
5650 | { |
5651 | m = MATCH_ERROR; |
5652 | goto cleanup; |
5653 | } |
5654 | if (current_ts.type != BT_INTEGER) |
5655 | { |
5656 | gfc_error ("Component with KIND attribute at %C must be " |
5657 | "INTEGER" ); |
5658 | m = MATCH_ERROR; |
5659 | goto cleanup; |
5660 | } |
5661 | } |
5662 | else if (d == DECL_LEN) |
5663 | { |
5664 | if (!gfc_notify_std (GFC_STD_F2003, is_derived |
5665 | ? G_("LEN attribute at %C in a " |
5666 | "TYPE definition" ) |
5667 | : G_("LEN attribute at %C in a " |
5668 | "STRUCTURE definition" ))) |
5669 | { |
5670 | m = MATCH_ERROR; |
5671 | goto cleanup; |
5672 | } |
5673 | if (current_ts.type != BT_INTEGER) |
5674 | { |
5675 | gfc_error ("Component with LEN attribute at %C must be " |
5676 | "INTEGER" ); |
5677 | m = MATCH_ERROR; |
5678 | goto cleanup; |
5679 | } |
5680 | } |
5681 | else |
5682 | { |
5683 | gfc_error (is_derived ? G_("Attribute at %L is not allowed in a " |
5684 | "TYPE definition" ) |
5685 | : G_("Attribute at %L is not allowed in a " |
5686 | "STRUCTURE definition" ), &seen_at[d]); |
5687 | m = MATCH_ERROR; |
5688 | goto cleanup; |
5689 | } |
5690 | } |
5691 | |
5692 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
5693 | && gfc_current_state () != COMP_MODULE) |
5694 | { |
5695 | if (d == DECL_PRIVATE) |
5696 | attr = "PRIVATE" ; |
5697 | else |
5698 | attr = "PUBLIC" ; |
5699 | if (gfc_current_state () == COMP_DERIVED |
5700 | && gfc_state_stack->previous |
5701 | && gfc_state_stack->previous->state == COMP_MODULE) |
5702 | { |
5703 | if (!gfc_notify_std (GFC_STD_F2003, "Attribute %s " |
5704 | "at %L in a TYPE definition" , attr, |
5705 | &seen_at[d])) |
5706 | { |
5707 | m = MATCH_ERROR; |
5708 | goto cleanup; |
5709 | } |
5710 | } |
5711 | else |
5712 | { |
5713 | gfc_error ("%s attribute at %L is not allowed outside of the " |
5714 | "specification part of a module" , attr, &seen_at[d]); |
5715 | m = MATCH_ERROR; |
5716 | goto cleanup; |
5717 | } |
5718 | } |
5719 | |
5720 | if (gfc_current_state () != COMP_DERIVED |
5721 | && (d == DECL_KIND || d == DECL_LEN)) |
5722 | { |
5723 | gfc_error ("Attribute at %L is not allowed outside a TYPE " |
5724 | "definition" , &seen_at[d]); |
5725 | m = MATCH_ERROR; |
5726 | goto cleanup; |
5727 | } |
5728 | |
5729 | switch (d) |
5730 | { |
5731 | case DECL_ALLOCATABLE: |
5732 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); |
5733 | break; |
5734 | |
5735 | case DECL_ASYNCHRONOUS: |
5736 | if (!gfc_notify_std (GFC_STD_F2003, "ASYNCHRONOUS attribute at %C" )) |
5737 | t = false; |
5738 | else |
5739 | t = gfc_add_asynchronous (¤t_attr, NULL, &seen_at[d]); |
5740 | break; |
5741 | |
5742 | case DECL_CODIMENSION: |
5743 | t = gfc_add_codimension (¤t_attr, NULL, &seen_at[d]); |
5744 | break; |
5745 | |
5746 | case DECL_CONTIGUOUS: |
5747 | if (!gfc_notify_std (GFC_STD_F2008, "CONTIGUOUS attribute at %C" )) |
5748 | t = false; |
5749 | else |
5750 | t = gfc_add_contiguous (¤t_attr, NULL, &seen_at[d]); |
5751 | break; |
5752 | |
5753 | case DECL_DIMENSION: |
5754 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
5755 | break; |
5756 | |
5757 | case DECL_EXTERNAL: |
5758 | t = gfc_add_external (¤t_attr, &seen_at[d]); |
5759 | break; |
5760 | |
5761 | case DECL_IN: |
5762 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); |
5763 | break; |
5764 | |
5765 | case DECL_OUT: |
5766 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); |
5767 | break; |
5768 | |
5769 | case DECL_INOUT: |
5770 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); |
5771 | break; |
5772 | |
5773 | case DECL_INTRINSIC: |
5774 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); |
5775 | break; |
5776 | |
5777 | case DECL_OPTIONAL: |
5778 | t = gfc_add_optional (¤t_attr, &seen_at[d]); |
5779 | break; |
5780 | |
5781 | case DECL_KIND: |
5782 | t = gfc_add_kind (¤t_attr, &seen_at[d]); |
5783 | break; |
5784 | |
5785 | case DECL_LEN: |
5786 | t = gfc_add_len (¤t_attr, &seen_at[d]); |
5787 | break; |
5788 | |
5789 | case DECL_PARAMETER: |
5790 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
5791 | break; |
5792 | |
5793 | case DECL_POINTER: |
5794 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); |
5795 | break; |
5796 | |
5797 | case DECL_PROTECTED: |
5798 | if (gfc_current_state () != COMP_MODULE |
5799 | || (gfc_current_ns->proc_name |
5800 | && gfc_current_ns->proc_name->attr.flavor != FL_MODULE)) |
5801 | { |
5802 | gfc_error ("PROTECTED at %C only allowed in specification " |
5803 | "part of a module" ); |
5804 | t = false; |
5805 | break; |
5806 | } |
5807 | |
5808 | if (!gfc_notify_std (GFC_STD_F2003, "PROTECTED attribute at %C" )) |
5809 | t = false; |
5810 | else |
5811 | t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]); |
5812 | break; |
5813 | |
5814 | case DECL_PRIVATE: |
5815 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
5816 | &seen_at[d]); |
5817 | break; |
5818 | |
5819 | case DECL_PUBLIC: |
5820 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
5821 | &seen_at[d]); |
5822 | break; |
5823 | |
5824 | case DECL_STATIC: |
5825 | case DECL_SAVE: |
5826 | t = gfc_add_save (¤t_attr, SAVE_EXPLICIT, NULL, &seen_at[d]); |
5827 | break; |
5828 | |
5829 | case DECL_AUTOMATIC: |
5830 | t = gfc_add_automatic (¤t_attr, NULL, &seen_at[d]); |
5831 | break; |
5832 | |
5833 | case DECL_TARGET: |
5834 | t = gfc_add_target (¤t_attr, &seen_at[d]); |
5835 | break; |
5836 | |
5837 | case DECL_IS_BIND_C: |
5838 | t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0); |
5839 | break; |
5840 | |
5841 | case DECL_VALUE: |
5842 | if (!gfc_notify_std (GFC_STD_F2003, "VALUE attribute at %C" )) |
5843 | t = false; |
5844 | else |
5845 | t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); |
5846 | break; |
5847 | |
5848 | case DECL_VOLATILE: |
5849 | if (!gfc_notify_std (GFC_STD_F2003, "VOLATILE attribute at %C" )) |
5850 | t = false; |
5851 | else |
5852 | t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); |
5853 | break; |
5854 | |
5855 | default: |
5856 | gfc_internal_error ("match_attr_spec(): Bad attribute" ); |
5857 | } |
5858 | |
5859 | if (!t) |
5860 | { |
5861 | m = MATCH_ERROR; |
5862 | goto cleanup; |
5863 | } |
5864 | } |
5865 | |
5866 | /* Since Fortran 2008 module variables implicitly have the SAVE attribute. */ |
5867 | if ((gfc_current_state () == COMP_MODULE |
5868 | || gfc_current_state () == COMP_SUBMODULE) |
5869 | && !current_attr.save |
5870 | && (gfc_option.allow_std & GFC_STD_F2008) != 0) |
5871 | current_attr.save = SAVE_IMPLICIT; |
5872 | |
5873 | colon_seen = 1; |
5874 | return MATCH_YES; |
5875 | |
5876 | cleanup: |
5877 | gfc_current_locus = start; |
5878 | gfc_free_array_spec (current_as); |
5879 | current_as = NULL; |
5880 | attr_seen = 0; |
5881 | return m; |
5882 | } |
5883 | |
5884 | |
5885 | /* Set the binding label, dest_label, either with the binding label |
5886 | stored in the given gfc_typespec, ts, or if none was provided, it |
5887 | will be the symbol name in all lower case, as required by the draft |
5888 | (J3/04-007, section 15.4.1). If a binding label was given and |
5889 | there is more than one argument (num_idents), it is an error. */ |
5890 | |
5891 | static bool |
5892 | set_binding_label (const char **dest_label, const char *sym_name, |
5893 | int num_idents) |
5894 | { |
5895 | if (num_idents > 1 && has_name_equals) |
5896 | { |
5897 | gfc_error ("Multiple identifiers provided with " |
5898 | "single NAME= specifier at %C" ); |
5899 | return false; |
5900 | } |
5901 | |
5902 | if (curr_binding_label) |
5903 | /* Binding label given; store in temp holder till have sym. */ |
5904 | *dest_label = curr_binding_label; |
5905 | else |
5906 | { |
5907 | /* No binding label given, and the NAME= specifier did not exist, |
5908 | which means there was no NAME="". */ |
5909 | if (sym_name != NULL && has_name_equals == 0) |
5910 | *dest_label = IDENTIFIER_POINTER (get_identifier (sym_name)); |
5911 | } |
5912 | |
5913 | return true; |
5914 | } |
5915 | |
5916 | |
5917 | /* Set the status of the given common block as being BIND(C) or not, |
5918 | depending on the given parameter, is_bind_c. */ |
5919 | |
5920 | static void |
5921 | set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c) |
5922 | { |
5923 | com_block->is_bind_c = is_bind_c; |
5924 | return; |
5925 | } |
5926 | |
5927 | |
5928 | /* Verify that the given gfc_typespec is for a C interoperable type. */ |
5929 | |
5930 | bool |
5931 | gfc_verify_c_interop (gfc_typespec *ts) |
5932 | { |
5933 | if (ts->type == BT_DERIVED && ts->u.derived != NULL) |
5934 | return (ts->u.derived->ts.is_c_interop || ts->u.derived->attr.is_bind_c) |
5935 | ? true : false; |
5936 | else if (ts->type == BT_CLASS) |
5937 | return false; |
5938 | else if (ts->is_c_interop != 1 && ts->type != BT_ASSUMED) |
5939 | return false; |
5940 | |
5941 | return true; |
5942 | } |
5943 | |
5944 | |
5945 | /* Verify that the variables of a given common block, which has been |
5946 | defined with the attribute specifier bind(c), to be of a C |
5947 | interoperable type. Errors will be reported here, if |
5948 | encountered. */ |
5949 | |
5950 | bool |
5951 | verify_com_block_vars_c_interop (gfc_common_head *com_block) |
5952 | { |
5953 | gfc_symbol *curr_sym = NULL; |
5954 | bool retval = true; |
5955 | |
5956 | curr_sym = com_block->head; |
5957 | |
5958 | /* Make sure we have at least one symbol. */ |
5959 | if (curr_sym == NULL) |
5960 | return retval; |
5961 | |
5962 | /* Here we know we have a symbol, so we'll execute this loop |
5963 | at least once. */ |
5964 | do |
5965 | { |
5966 | /* The second to last param, 1, says this is in a common block. */ |
5967 | retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block); |
5968 | curr_sym = curr_sym->common_next; |
5969 | } while (curr_sym != NULL); |
5970 | |
5971 | return retval; |
5972 | } |
5973 | |
5974 | |
5975 | /* Verify that a given BIND(C) symbol is C interoperable. If it is not, |
5976 | an appropriate error message is reported. */ |
5977 | |
5978 | bool |
5979 | verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts, |
5980 | int is_in_common, gfc_common_head *com_block) |
5981 | { |
5982 | bool bind_c_function = false; |
5983 | bool retval = true; |
5984 | |
5985 | if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c) |
5986 | bind_c_function = true; |
5987 | |
5988 | if (tmp_sym->attr.function && tmp_sym->result != NULL) |
5989 | { |
5990 | tmp_sym = tmp_sym->result; |
5991 | /* Make sure it wasn't an implicitly typed result. */ |
5992 | if (tmp_sym->attr.implicit_type && warn_c_binding_type) |
5993 | { |
5994 | gfc_warning (opt: OPT_Wc_binding_type, |
5995 | "Implicitly declared BIND(C) function %qs at " |
5996 | "%L may not be C interoperable" , tmp_sym->name, |
5997 | &tmp_sym->declared_at); |
5998 | tmp_sym->ts.f90_type = tmp_sym->ts.type; |
5999 | /* Mark it as C interoperable to prevent duplicate warnings. */ |
6000 | tmp_sym->ts.is_c_interop = 1; |
6001 | tmp_sym->attr.is_c_interop = 1; |
6002 | } |
6003 | } |
6004 | |
6005 | /* Here, we know we have the bind(c) attribute, so if we have |
6006 | enough type info, then verify that it's a C interop kind. |
6007 | The info could be in the symbol already, or possibly still in |
6008 | the given ts (current_ts), so look in both. */ |
6009 | if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN) |
6010 | { |
6011 | if (!gfc_verify_c_interop (ts: &(tmp_sym->ts))) |
6012 | { |
6013 | /* See if we're dealing with a sym in a common block or not. */ |
6014 | if (is_in_common == 1 && warn_c_binding_type) |
6015 | { |
6016 | gfc_warning (opt: OPT_Wc_binding_type, |
6017 | "Variable %qs in common block %qs at %L " |
6018 | "may not be a C interoperable " |
6019 | "kind though common block %qs is BIND(C)" , |
6020 | tmp_sym->name, com_block->name, |
6021 | &(tmp_sym->declared_at), com_block->name); |
6022 | } |
6023 | else |
6024 | { |
6025 | if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED |
6026 | || tmp_sym->ts.type == BT_CLASS || ts->type == BT_CLASS) |
6027 | { |
6028 | gfc_error ("Type declaration %qs at %L is not C " |
6029 | "interoperable but it is BIND(C)" , |
6030 | tmp_sym->name, &(tmp_sym->declared_at)); |
6031 | retval = false; |
6032 | } |
6033 | else if (warn_c_binding_type) |
6034 | gfc_warning (opt: OPT_Wc_binding_type, "Variable %qs at %L " |
6035 | "may not be a C interoperable " |
6036 | "kind but it is BIND(C)" , |
6037 | tmp_sym->name, &(tmp_sym->declared_at)); |
6038 | } |
6039 | } |
6040 | |
6041 | /* Variables declared w/in a common block can't be bind(c) |
6042 | since there's no way for C to see these variables, so there's |
6043 | semantically no reason for the attribute. */ |
6044 | if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1) |
6045 | { |
6046 | gfc_error ("Variable %qs in common block %qs at " |
6047 | "%L cannot be declared with BIND(C) " |
6048 | "since it is not a global" , |
6049 | tmp_sym->name, com_block->name, |
6050 | &(tmp_sym->declared_at)); |
6051 | retval = false; |
6052 | } |
6053 | |
6054 | /* Scalar variables that are bind(c) cannot have the pointer |
6055 | or allocatable attributes. */ |
6056 | if (tmp_sym->attr.is_bind_c == 1) |
6057 | { |
6058 | if (tmp_sym->attr.pointer == 1) |
6059 | { |
6060 | gfc_error ("Variable %qs at %L cannot have both the " |
6061 | "POINTER and BIND(C) attributes" , |
6062 | tmp_sym->name, &(tmp_sym->declared_at)); |
6063 | retval = false; |
6064 | } |
6065 | |
6066 | if (tmp_sym->attr.allocatable == 1) |
6067 | { |
6068 | gfc_error ("Variable %qs at %L cannot have both the " |
6069 | "ALLOCATABLE and BIND(C) attributes" , |
6070 | tmp_sym->name, &(tmp_sym->declared_at)); |
6071 | retval = false; |
6072 | } |
6073 | |
6074 | } |
6075 | |
6076 | /* If it is a BIND(C) function, make sure the return value is a |
6077 | scalar value. The previous tests in this function made sure |
6078 | the type is interoperable. */ |
6079 | if (bind_c_function && tmp_sym->as != NULL) |
6080 | gfc_error ("Return type of BIND(C) function %qs at %L cannot " |
6081 | "be an array" , tmp_sym->name, &(tmp_sym->declared_at)); |
6082 | |
6083 | /* BIND(C) functions cannot return a character string. */ |
6084 | if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER) |
6085 | if (!gfc_length_one_character_type_p (ts: &tmp_sym->ts)) |
6086 | gfc_error ("Return type of BIND(C) function %qs of character " |
6087 | "type at %L must have length 1" , tmp_sym->name, |
6088 | &(tmp_sym->declared_at)); |
6089 | } |
6090 | |
6091 | /* See if the symbol has been marked as private. If it has, make sure |
6092 | there is no binding label and warn the user if there is one. */ |
6093 | if (tmp_sym->attr.access == ACCESS_PRIVATE |
6094 | && tmp_sym->binding_label) |
6095 | /* Use gfc_warning_now because we won't say that the symbol fails |
6096 | just because of this. */ |
6097 | gfc_warning_now (opt: 0, "Symbol %qs at %L is marked PRIVATE but has been " |
6098 | "given the binding label %qs" , tmp_sym->name, |
6099 | &(tmp_sym->declared_at), tmp_sym->binding_label); |
6100 | |
6101 | return retval; |
6102 | } |
6103 | |
6104 | |
6105 | /* Set the appropriate fields for a symbol that's been declared as |
6106 | BIND(C) (the is_bind_c flag and the binding label), and verify that |
6107 | the type is C interoperable. Errors are reported by the functions |
6108 | used to set/test these fields. */ |
6109 | |
6110 | static bool |
6111 | set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents) |
6112 | { |
6113 | bool retval = true; |
6114 | |
6115 | /* TODO: Do we need to make sure the vars aren't marked private? */ |
6116 | |
6117 | /* Set the is_bind_c bit in symbol_attribute. */ |
6118 | gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0); |
6119 | |
6120 | if (!set_binding_label (dest_label: &tmp_sym->binding_label, sym_name: tmp_sym->name, num_idents)) |
6121 | return false; |
6122 | |
6123 | return retval; |
6124 | } |
6125 | |
6126 | |
6127 | /* Set the fields marking the given common block as BIND(C), including |
6128 | a binding label, and report any errors encountered. */ |
6129 | |
6130 | static bool |
6131 | set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents) |
6132 | { |
6133 | bool retval = true; |
6134 | |
6135 | /* destLabel, common name, typespec (which may have binding label). */ |
6136 | if (!set_binding_label (dest_label: &com_block->binding_label, sym_name: com_block->name, |
6137 | num_idents)) |
6138 | return false; |
6139 | |
6140 | /* Set the given common block (com_block) to being bind(c) (1). */ |
6141 | set_com_block_bind_c (com_block, is_bind_c: 1); |
6142 | |
6143 | return retval; |
6144 | } |
6145 | |
6146 | |
6147 | /* Retrieve the list of one or more identifiers that the given bind(c) |
6148 | attribute applies to. */ |
6149 | |
6150 | static bool |
6151 | get_bind_c_idents (void) |
6152 | { |
6153 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
6154 | int num_idents = 0; |
6155 | gfc_symbol *tmp_sym = NULL; |
6156 | match found_id; |
6157 | gfc_common_head *com_block = NULL; |
6158 | |
6159 | if (gfc_match_name (name) == MATCH_YES) |
6160 | { |
6161 | found_id = MATCH_YES; |
6162 | gfc_get_ha_symbol (name, &tmp_sym); |
6163 | } |
6164 | else if (gfc_match_common_name (name) == MATCH_YES) |
6165 | { |
6166 | found_id = MATCH_YES; |
6167 | com_block = gfc_get_common (name, 0); |
6168 | } |
6169 | else |
6170 | { |
6171 | gfc_error ("Need either entity or common block name for " |
6172 | "attribute specification statement at %C" ); |
6173 | return false; |
6174 | } |
6175 | |
6176 | /* Save the current identifier and look for more. */ |
6177 | do |
6178 | { |
6179 | /* Increment the number of identifiers found for this spec stmt. */ |
6180 | num_idents++; |
6181 | |
6182 | /* Make sure we have a sym or com block, and verify that it can |
6183 | be bind(c). Set the appropriate field(s) and look for more |
6184 | identifiers. */ |
6185 | if (tmp_sym != NULL || com_block != NULL) |
6186 | { |
6187 | if (tmp_sym != NULL) |
6188 | { |
6189 | if (!set_verify_bind_c_sym (tmp_sym, num_idents)) |
6190 | return false; |
6191 | } |
6192 | else |
6193 | { |
6194 | if (!set_verify_bind_c_com_block (com_block, num_idents)) |
6195 | return false; |
6196 | } |
6197 | |
6198 | /* Look to see if we have another identifier. */ |
6199 | tmp_sym = NULL; |
6200 | if (gfc_match_eos () == MATCH_YES) |
6201 | found_id = MATCH_NO; |
6202 | else if (gfc_match_char (',') != MATCH_YES) |
6203 | found_id = MATCH_NO; |
6204 | else if (gfc_match_name (name) == MATCH_YES) |
6205 | { |
6206 | found_id = MATCH_YES; |
6207 | gfc_get_ha_symbol (name, &tmp_sym); |
6208 | } |
6209 | else if (gfc_match_common_name (name) == MATCH_YES) |
6210 | { |
6211 | found_id = MATCH_YES; |
6212 | com_block = gfc_get_common (name, 0); |
6213 | } |
6214 | else |
6215 | { |
6216 | gfc_error ("Missing entity or common block name for " |
6217 | "attribute specification statement at %C" ); |
6218 | return false; |
6219 | } |
6220 | } |
6221 | else |
6222 | { |
6223 | gfc_internal_error ("Missing symbol" ); |
6224 | } |
6225 | } while (found_id == MATCH_YES); |
6226 | |
6227 | /* if we get here we were successful */ |
6228 | return true; |
6229 | } |
6230 | |
6231 | |
6232 | /* Try and match a BIND(C) attribute specification statement. */ |
6233 | |
6234 | match |
6235 | gfc_match_bind_c_stmt (void) |
6236 | { |
6237 | match found_match = MATCH_NO; |
6238 | gfc_typespec *ts; |
6239 | |
6240 | ts = ¤t_ts; |
6241 | |
6242 | /* This may not be necessary. */ |
6243 | gfc_clear_ts (ts); |
6244 | /* Clear the temporary binding label holder. */ |
6245 | curr_binding_label = NULL; |
6246 | |
6247 | /* Look for the bind(c). */ |
6248 | found_match = gfc_match_bind_c (NULL, true); |
6249 | |
6250 | if (found_match == MATCH_YES) |
6251 | { |
6252 | if (!gfc_notify_std (GFC_STD_F2003, "BIND(C) statement at %C" )) |
6253 | return MATCH_ERROR; |
6254 | |
6255 | /* Look for the :: now, but it is not required. */ |
6256 | gfc_match (" :: " ); |
6257 | |
6258 | /* Get the identifier(s) that needs to be updated. This may need to |
6259 | change to hand the flag(s) for the attr specified so all identifiers |
6260 | found can have all appropriate parts updated (assuming that the same |
6261 | spec stmt can have multiple attrs, such as both bind(c) and |
6262 | allocatable...). */ |
6263 | if (!get_bind_c_idents ()) |
6264 | /* Error message should have printed already. */ |
6265 | return MATCH_ERROR; |
6266 | } |
6267 | |
6268 | return found_match; |
6269 | } |
6270 | |
6271 | |
6272 | /* Match a data declaration statement. */ |
6273 | |
6274 | match |
6275 | gfc_match_data_decl (void) |
6276 | { |
6277 | gfc_symbol *sym; |
6278 | match m; |
6279 | int elem; |
6280 | |
6281 | type_param_spec_list = NULL; |
6282 | decl_type_param_list = NULL; |
6283 | |
6284 | num_idents_on_line = 0; |
6285 | |
6286 | m = gfc_match_decl_type_spec (ts: ¤t_ts, implicit_flag: 0); |
6287 | if (m != MATCH_YES) |
6288 | return m; |
6289 | |
6290 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
6291 | && !gfc_comp_struct (gfc_current_state ())) |
6292 | { |
6293 | sym = gfc_use_derived (current_ts.u.derived); |
6294 | |
6295 | if (sym == NULL) |
6296 | { |
6297 | m = MATCH_ERROR; |
6298 | goto cleanup; |
6299 | } |
6300 | |
6301 | current_ts.u.derived = sym; |
6302 | } |
6303 | |
6304 | m = match_attr_spec (); |
6305 | if (m == MATCH_ERROR) |
6306 | { |
6307 | m = MATCH_NO; |
6308 | goto cleanup; |
6309 | } |
6310 | |
6311 | /* F2018:C708. */ |
6312 | if (current_ts.type == BT_CLASS && current_attr.flavor == FL_PARAMETER) |
6313 | { |
6314 | gfc_error ("CLASS entity at %C cannot have the PARAMETER attribute" ); |
6315 | m = MATCH_ERROR; |
6316 | goto cleanup; |
6317 | } |
6318 | |
6319 | if (current_ts.type == BT_CLASS |
6320 | && current_ts.u.derived->attr.unlimited_polymorphic) |
6321 | goto ok; |
6322 | |
6323 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
6324 | && current_ts.u.derived->components == NULL |
6325 | && !current_ts.u.derived->attr.zero_comp) |
6326 | { |
6327 | |
6328 | if (current_attr.pointer && gfc_comp_struct (gfc_current_state ())) |
6329 | goto ok; |
6330 | |
6331 | if (current_attr.allocatable && gfc_current_state () == COMP_DERIVED) |
6332 | goto ok; |
6333 | |
6334 | gfc_find_symbol (current_ts.u.derived->name, |
6335 | current_ts.u.derived->ns, 1, &sym); |
6336 | |
6337 | /* Any symbol that we find had better be a type definition |
6338 | which has its components defined, or be a structure definition |
6339 | actively being parsed. */ |
6340 | if (sym != NULL && gfc_fl_struct (sym->attr.flavor) |
6341 | && (current_ts.u.derived->components != NULL |
6342 | || current_ts.u.derived->attr.zero_comp |
6343 | || current_ts.u.derived == gfc_new_block)) |
6344 | goto ok; |
6345 | |
6346 | gfc_error ("Derived type at %C has not been previously defined " |
6347 | "and so cannot appear in a derived type definition" ); |
6348 | m = MATCH_ERROR; |
6349 | goto cleanup; |
6350 | } |
6351 | |
6352 | ok: |
6353 | /* If we have an old-style character declaration, and no new-style |
6354 | attribute specifications, then there a comma is optional between |
6355 | the type specification and the variable list. */ |
6356 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) |
6357 | gfc_match_char (','); |
6358 | |
6359 | /* Give the types/attributes to symbols that follow. Give the element |
6360 | a number so that repeat character length expressions can be copied. */ |
6361 | elem = 1; |
6362 | for (;;) |
6363 | { |
6364 | num_idents_on_line++; |
6365 | m = variable_decl (elem: elem++); |
6366 | if (m == MATCH_ERROR) |
6367 | goto cleanup; |
6368 | if (m == MATCH_NO) |
6369 | break; |
6370 | |
6371 | if (gfc_match_eos () == MATCH_YES) |
6372 | goto cleanup; |
6373 | if (gfc_match_char (',') != MATCH_YES) |
6374 | break; |
6375 | } |
6376 | |
6377 | if (!gfc_error_flag_test ()) |
6378 | { |
6379 | /* An anonymous structure declaration is unambiguous; if we matched one |
6380 | according to gfc_match_structure_decl, we need to return MATCH_YES |
6381 | here to avoid confusing the remaining matchers, even if there was an |
6382 | error during variable_decl. We must flush any such errors. Note this |
6383 | causes the parser to gracefully continue parsing the remaining input |
6384 | as a structure body, which likely follows. */ |
6385 | if (current_ts.type == BT_DERIVED && current_ts.u.derived |
6386 | && gfc_fl_struct (current_ts.u.derived->attr.flavor)) |
6387 | { |
6388 | gfc_error_now ("Syntax error in anonymous structure declaration" |
6389 | " at %C" ); |
6390 | /* Skip the bad variable_decl and line up for the start of the |
6391 | structure body. */ |
6392 | gfc_error_recovery (); |
6393 | m = MATCH_YES; |
6394 | goto cleanup; |
6395 | } |
6396 | |
6397 | gfc_error ("Syntax error in data declaration at %C" ); |
6398 | } |
6399 | |
6400 | m = MATCH_ERROR; |
6401 | |
6402 | gfc_free_data_all (ns: gfc_current_ns); |
6403 | |
6404 | cleanup: |
6405 | if (saved_kind_expr) |
6406 | gfc_free_expr (saved_kind_expr); |
6407 | if (type_param_spec_list) |
6408 | gfc_free_actual_arglist (type_param_spec_list); |
6409 | if (decl_type_param_list) |
6410 | gfc_free_actual_arglist (decl_type_param_list); |
6411 | saved_kind_expr = NULL; |
6412 | gfc_free_array_spec (current_as); |
6413 | current_as = NULL; |
6414 | return m; |
6415 | } |
6416 | |
6417 | static bool |
6418 | in_module_or_interface(void) |
6419 | { |
6420 | if (gfc_current_state () == COMP_MODULE |
6421 | || gfc_current_state () == COMP_SUBMODULE |
6422 | || gfc_current_state () == COMP_INTERFACE) |
6423 | return true; |
6424 | |
6425 | if (gfc_state_stack->state == COMP_CONTAINS |
6426 | || gfc_state_stack->state == COMP_FUNCTION |
6427 | || gfc_state_stack->state == COMP_SUBROUTINE) |
6428 | { |
6429 | gfc_state_data *p; |
6430 | for (p = gfc_state_stack->previous; p ; p = p->previous) |
6431 | { |
6432 | if (p->state == COMP_MODULE || p->state == COMP_SUBMODULE |
6433 | || p->state == COMP_INTERFACE) |
6434 | return true; |
6435 | } |
6436 | } |
6437 | return false; |
6438 | } |
6439 | |
6440 | /* Match a prefix associated with a function or subroutine |
6441 | declaration. If the typespec pointer is nonnull, then a typespec |
6442 | can be matched. Note that if nothing matches, MATCH_YES is |
6443 | returned (the null string was matched). */ |
6444 | |
6445 | match |
6446 | gfc_match_prefix (gfc_typespec *ts) |
6447 | { |
6448 | bool seen_type; |
6449 | bool seen_impure; |
6450 | bool found_prefix; |
6451 | |
6452 | gfc_clear_attr (¤t_attr); |
6453 | seen_type = false; |
6454 | seen_impure = false; |
6455 | |
6456 | gcc_assert (!gfc_matching_prefix); |
6457 | gfc_matching_prefix = true; |
6458 | |
6459 | do |
6460 | { |
6461 | found_prefix = false; |
6462 | |
6463 | /* MODULE is a prefix like PURE, ELEMENTAL, etc., having a |
6464 | corresponding attribute seems natural and distinguishes these |
6465 | procedures from procedure types of PROC_MODULE, which these are |
6466 | as well. */ |
6467 | if (gfc_match ("module% " ) == MATCH_YES) |
6468 | { |
6469 | if (!gfc_notify_std (GFC_STD_F2008, "MODULE prefix at %C" )) |
6470 | goto error; |
6471 | |
6472 | if (!in_module_or_interface ()) |
6473 | { |
6474 | gfc_error ("MODULE prefix at %C found outside of a module, " |
6475 | "submodule, or interface" ); |
6476 | goto error; |
6477 | } |
6478 | |
6479 | current_attr.module_procedure = 1; |
6480 | found_prefix = true; |
6481 | } |
6482 | |
6483 | if (!seen_type && ts != NULL) |
6484 | { |
6485 | match m; |
6486 | m = gfc_match_decl_type_spec (ts, implicit_flag: 0); |
6487 | if (m == MATCH_ERROR) |
6488 | goto error; |
6489 | if (m == MATCH_YES && gfc_match_space () == MATCH_YES) |
6490 | { |
6491 | seen_type = true; |
6492 | found_prefix = true; |
6493 | } |
6494 | } |
6495 | |
6496 | if (gfc_match ("elemental% " ) == MATCH_YES) |
6497 | { |
6498 | if (!gfc_add_elemental (¤t_attr, NULL)) |
6499 | goto error; |
6500 | |
6501 | found_prefix = true; |
6502 | } |
6503 | |
6504 | if (gfc_match ("pure% " ) == MATCH_YES) |
6505 | { |
6506 | if (!gfc_add_pure (¤t_attr, NULL)) |
6507 | goto error; |
6508 | |
6509 | found_prefix = true; |
6510 | } |
6511 | |
6512 | if (gfc_match ("recursive% " ) == MATCH_YES) |
6513 | { |
6514 | if (!gfc_add_recursive (¤t_attr, NULL)) |
6515 | goto error; |
6516 | |
6517 | found_prefix = true; |
6518 | } |
6519 | |
6520 | /* IMPURE is a somewhat special case, as it needs not set an actual |
6521 | attribute but rather only prevents ELEMENTAL routines from being |
6522 | automatically PURE. */ |
6523 | if (gfc_match ("impure% " ) == MATCH_YES) |
6524 | { |
6525 | if (!gfc_notify_std (GFC_STD_F2008, "IMPURE procedure at %C" )) |
6526 | goto error; |
6527 | |
6528 | seen_impure = true; |
6529 | found_prefix = true; |
6530 | } |
6531 | } |
6532 | while (found_prefix); |
6533 | |
6534 | /* IMPURE and PURE must not both appear, of course. */ |
6535 | if (seen_impure && current_attr.pure) |
6536 | { |
6537 | gfc_error ("PURE and IMPURE must not appear both at %C" ); |
6538 | goto error; |
6539 | } |
6540 | |
6541 | /* If IMPURE it not seen but the procedure is ELEMENTAL, mark it as PURE. */ |
6542 | if (!seen_impure && current_attr.elemental && !current_attr.pure) |
6543 | { |
6544 | if (!gfc_add_pure (¤t_attr, NULL)) |
6545 | goto error; |
6546 | } |
6547 | |
6548 | /* At this point, the next item is not a prefix. */ |
6549 | gcc_assert (gfc_matching_prefix); |
6550 | |
6551 | gfc_matching_prefix = false; |
6552 | return MATCH_YES; |
6553 | |
6554 | error: |
6555 | gcc_assert (gfc_matching_prefix); |
6556 | gfc_matching_prefix = false; |
6557 | return MATCH_ERROR; |
6558 | } |
6559 | |
6560 | |
6561 | /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */ |
6562 | |
6563 | static bool |
6564 | copy_prefix (symbol_attribute *dest, locus *where) |
6565 | { |
6566 | if (dest->module_procedure) |
6567 | { |
6568 | if (current_attr.elemental) |
6569 | dest->elemental = 1; |
6570 | |
6571 | if (current_attr.pure) |
6572 | dest->pure = 1; |
6573 | |
6574 | if (current_attr.recursive) |
6575 | dest->recursive = 1; |
6576 | |
6577 | /* Module procedures are unusual in that the 'dest' is copied from |
6578 | the interface declaration. However, this is an oportunity to |
6579 | check that the submodule declaration is compliant with the |
6580 | interface. */ |
6581 | if (dest->elemental && !current_attr.elemental) |
6582 | { |
6583 | gfc_error ("ELEMENTAL prefix in MODULE PROCEDURE interface is " |
6584 | "missing at %L" , where); |
6585 | return false; |
6586 | } |
6587 | |
6588 | if (dest->pure && !current_attr.pure) |
6589 | { |
6590 | gfc_error ("PURE prefix in MODULE PROCEDURE interface is " |
6591 | "missing at %L" , where); |
6592 | return false; |
6593 | } |
6594 | |
6595 | if (dest->recursive && !current_attr.recursive) |
6596 | { |
6597 | gfc_error ("RECURSIVE prefix in MODULE PROCEDURE interface is " |
6598 | "missing at %L" , where); |
6599 | return false; |
6600 | } |
6601 | |
6602 | return true; |
6603 | } |
6604 | |
6605 | if (current_attr.elemental && !gfc_add_elemental (dest, where)) |
6606 | return false; |
6607 | |
6608 | if (current_attr.pure && !gfc_add_pure (dest, where)) |
6609 | return false; |
6610 | |
6611 | if (current_attr.recursive && !gfc_add_recursive (dest, where)) |
6612 | return false; |
6613 | |
6614 | return true; |
6615 | } |
6616 | |
6617 | |
6618 | /* Match a formal argument list or, if typeparam is true, a |
6619 | type_param_name_list. */ |
6620 | |
6621 | match |
6622 | gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, |
6623 | int null_flag, bool typeparam) |
6624 | { |
6625 | gfc_formal_arglist *head, *tail, *p, *q; |
6626 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
6627 | gfc_symbol *sym; |
6628 | match m; |
6629 | gfc_formal_arglist *formal = NULL; |
6630 | |
6631 | head = tail = NULL; |
6632 | |
6633 | /* Keep the interface formal argument list and null it so that the |
6634 | matching for the new declaration can be done. The numbers and |
6635 | names of the arguments are checked here. The interface formal |
6636 | arguments are retained in formal_arglist and the characteristics |
6637 | are compared in resolve.cc(resolve_fl_procedure). See the remark |
6638 | in get_proc_name about the eventual need to copy the formal_arglist |
6639 | and populate the formal namespace of the interface symbol. */ |
6640 | if (progname->attr.module_procedure |
6641 | && progname->attr.host_assoc) |
6642 | { |
6643 | formal = progname->formal; |
6644 | progname->formal = NULL; |
6645 | } |
6646 | |
6647 | if (gfc_match_char ('(') != MATCH_YES) |
6648 | { |
6649 | if (null_flag) |
6650 | goto ok; |
6651 | return MATCH_NO; |
6652 | } |
6653 | |
6654 | if (gfc_match_char (')') == MATCH_YES) |
6655 | { |
6656 | if (typeparam) |
6657 | { |
6658 | gfc_error_now ("A type parameter list is required at %C" ); |
6659 | m = MATCH_ERROR; |
6660 | goto cleanup; |
6661 | } |
6662 | else |
6663 | goto ok; |
6664 | } |
6665 | |
6666 | for (;;) |
6667 | { |
6668 | if (gfc_match_char ('*') == MATCH_YES) |
6669 | { |
6670 | sym = NULL; |
6671 | if (!typeparam && !gfc_notify_std (GFC_STD_F95_OBS, |
6672 | "Alternate-return argument at %C" )) |
6673 | { |
6674 | m = MATCH_ERROR; |
6675 | goto cleanup; |
6676 | } |
6677 | else if (typeparam) |
6678 | gfc_error_now ("A parameter name is required at %C" ); |
6679 | } |
6680 | else |
6681 | { |
6682 | m = gfc_match_name (name); |
6683 | if (m != MATCH_YES) |
6684 | { |
6685 | if(typeparam) |
6686 | gfc_error_now ("A parameter name is required at %C" ); |
6687 | goto cleanup; |
6688 | } |
6689 | |
6690 | if (!typeparam && gfc_get_symbol (name, NULL, &sym)) |
6691 | goto cleanup; |
6692 | else if (typeparam |
6693 | && gfc_get_symbol (name, progname->f2k_derived, &sym)) |
6694 | goto cleanup; |
6695 | } |
6696 | |
6697 | p = gfc_get_formal_arglist (); |
6698 | |
6699 | if (head == NULL) |
6700 | head = tail = p; |
6701 | else |
6702 | { |
6703 | tail->next = p; |
6704 | tail = p; |
6705 | } |
6706 | |
6707 | tail->sym = sym; |
6708 | |
6709 | /* We don't add the VARIABLE flavor because the name could be a |
6710 | dummy procedure. We don't apply these attributes to formal |
6711 | arguments of statement functions. */ |
6712 | if (sym != NULL && !st_flag |
6713 | && (!gfc_add_dummy(&sym->attr, sym->name, NULL) |
6714 | || !gfc_missing_attr (&sym->attr, NULL))) |
6715 | { |
6716 | m = MATCH_ERROR; |
6717 | goto cleanup; |
6718 | } |
6719 | |
6720 | /* The name of a program unit can be in a different namespace, |
6721 | so check for it explicitly. After the statement is accepted, |
6722 | the name is checked for especially in gfc_get_symbol(). */ |
6723 | if (gfc_new_block != NULL && sym != NULL && !typeparam |
6724 | && strcmp (s1: sym->name, s2: gfc_new_block->name) == 0) |
6725 | { |
6726 | gfc_error ("Name %qs at %C is the name of the procedure" , |
6727 | sym->name); |
6728 | m = MATCH_ERROR; |
6729 | goto cleanup; |
6730 | } |
6731 | |
6732 | if (gfc_match_char (')') == MATCH_YES) |
6733 | goto ok; |
6734 | |
6735 | m = gfc_match_char (','); |
6736 | if (m != MATCH_YES) |
6737 | { |
6738 | if (typeparam) |
6739 | gfc_error_now ("Expected parameter list in type declaration " |
6740 | "at %C" ); |
6741 | else |
6742 | gfc_error ("Unexpected junk in formal argument list at %C" ); |
6743 | goto cleanup; |
6744 | } |
6745 | } |
6746 | |
6747 | ok: |
6748 | /* Check for duplicate symbols in the formal argument list. */ |
6749 | if (head != NULL) |
6750 | { |
6751 | for (p = head; p->next; p = p->next) |
6752 | { |
6753 | if (p->sym == NULL) |
6754 | continue; |
6755 | |
6756 | for (q = p->next; q; q = q->next) |
6757 | if (p->sym == q->sym) |
6758 | { |
6759 | if (typeparam) |
6760 | gfc_error_now ("Duplicate name %qs in parameter " |
6761 | "list at %C" , p->sym->name); |
6762 | else |
6763 | gfc_error ("Duplicate symbol %qs in formal argument " |
6764 | "list at %C" , p->sym->name); |
6765 | |
6766 | m = MATCH_ERROR; |
6767 | goto cleanup; |
6768 | } |
6769 | } |
6770 | } |
6771 | |
6772 | if (!gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL)) |
6773 | { |
6774 | m = MATCH_ERROR; |
6775 | goto cleanup; |
6776 | } |
6777 | |
6778 | /* gfc_error_now used in following and return with MATCH_YES because |
6779 | doing otherwise results in a cascade of extraneous errors and in |
6780 | some cases an ICE in symbol.cc(gfc_release_symbol). */ |
6781 | if (progname->attr.module_procedure && progname->attr.host_assoc) |
6782 | { |
6783 | bool arg_count_mismatch = false; |
6784 | |
6785 | if (!formal && head) |
6786 | arg_count_mismatch = true; |
6787 | |
6788 | /* Abbreviated module procedure declaration is not meant to have any |
6789 | formal arguments! */ |
6790 | if (!progname->abr_modproc_decl && formal && !head) |
6791 | arg_count_mismatch = true; |
6792 | |
6793 | for (p = formal, q = head; p && q; p = p->next, q = q->next) |
6794 | { |
6795 | if ((p->next != NULL && q->next == NULL) |
6796 | || (p->next == NULL && q->next != NULL)) |
6797 | arg_count_mismatch = true; |
6798 | else if ((p->sym == NULL && q->sym == NULL) |
6799 | || (p->sym && q->sym |
6800 | && strcmp (s1: p->sym->name, s2: q->sym->name) == 0)) |
6801 | continue; |
6802 | else |
6803 | { |
6804 | if (q->sym == NULL) |
6805 | gfc_error_now ("MODULE PROCEDURE formal argument %qs " |
6806 | "conflicts with alternate return at %C" , |
6807 | p->sym->name); |
6808 | else if (p->sym == NULL) |
6809 | gfc_error_now ("MODULE PROCEDURE formal argument is " |
6810 | "alternate return and conflicts with " |
6811 | "%qs in the separate declaration at %C" , |
6812 | q->sym->name); |
6813 | else |
6814 | gfc_error_now ("Mismatch in MODULE PROCEDURE formal " |
6815 | "argument names (%s/%s) at %C" , |
6816 | p->sym->name, q->sym->name); |
6817 | } |
6818 | } |
6819 | |
6820 | if (arg_count_mismatch) |
6821 | gfc_error_now ("Mismatch in number of MODULE PROCEDURE " |
6822 | "formal arguments at %C" ); |
6823 | } |
6824 | |
6825 | return MATCH_YES; |
6826 | |
6827 | cleanup: |
6828 | gfc_free_formal_arglist (head); |
6829 | return m; |
6830 | } |
6831 | |
6832 | |
6833 | /* Match a RESULT specification following a function declaration or |
6834 | ENTRY statement. Also matches the end-of-statement. */ |
6835 | |
6836 | static match |
6837 | match_result (gfc_symbol *function, gfc_symbol **result) |
6838 | { |
6839 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
6840 | gfc_symbol *r; |
6841 | match m; |
6842 | |
6843 | if (gfc_match (" result (" ) != MATCH_YES) |
6844 | return MATCH_NO; |
6845 | |
6846 | m = gfc_match_name (name); |
6847 | if (m != MATCH_YES) |
6848 | return m; |
6849 | |
6850 | /* Get the right paren, and that's it because there could be the |
6851 | bind(c) attribute after the result clause. */ |
6852 | if (gfc_match_char (')') != MATCH_YES) |
6853 | { |
6854 | /* TODO: should report the missing right paren here. */ |
6855 | return MATCH_ERROR; |
6856 | } |
6857 | |
6858 | if (strcmp (s1: function->name, s2: name) == 0) |
6859 | { |
6860 | gfc_error ("RESULT variable at %C must be different than function name" ); |
6861 | return MATCH_ERROR; |
6862 | } |
6863 | |
6864 | if (gfc_get_symbol (name, NULL, &r)) |
6865 | return MATCH_ERROR; |
6866 | |
6867 | if (!gfc_add_result (&r->attr, r->name, NULL)) |
6868 | return MATCH_ERROR; |
6869 | |
6870 | *result = r; |
6871 | |
6872 | return MATCH_YES; |
6873 | } |
6874 | |
6875 | |
6876 | /* Match a function suffix, which could be a combination of a result |
6877 | clause and BIND(C), either one, or neither. The draft does not |
6878 | require them to come in a specific order. */ |
6879 | |
6880 | static match |
6881 | gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result) |
6882 | { |
6883 | match is_bind_c; /* Found bind(c). */ |
6884 | match is_result; /* Found result clause. */ |
6885 | match found_match; /* Status of whether we've found a good match. */ |
6886 | char peek_char; /* Character we're going to peek at. */ |
6887 | bool allow_binding_name; |
6888 | |
6889 | /* Initialize to having found nothing. */ |
6890 | found_match = MATCH_NO; |
6891 | is_bind_c = MATCH_NO; |
6892 | is_result = MATCH_NO; |
6893 | |
6894 | /* Get the next char to narrow between result and bind(c). */ |
6895 | gfc_gobble_whitespace (); |
6896 | peek_char = gfc_peek_ascii_char (); |
6897 | |
6898 | /* C binding names are not allowed for internal procedures. */ |
6899 | if (gfc_current_state () == COMP_CONTAINS |
6900 | && sym->ns->proc_name->attr.flavor != FL_MODULE) |
6901 | allow_binding_name = false; |
6902 | else |
6903 | allow_binding_name = true; |
6904 | |
6905 | switch (peek_char) |
6906 | { |
6907 | case 'r': |
6908 | /* Look for result clause. */ |
6909 | is_result = match_result (function: sym, result); |
6910 | if (is_result == MATCH_YES) |
6911 | { |
6912 | /* Now see if there is a bind(c) after it. */ |
6913 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
6914 | /* We've found the result clause and possibly bind(c). */ |
6915 | found_match = MATCH_YES; |
6916 | } |
6917 | else |
6918 | /* This should only be MATCH_ERROR. */ |
6919 | found_match = is_result; |
6920 | break; |
6921 | case 'b': |
6922 | /* Look for bind(c) first. */ |
6923 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
6924 | if (is_bind_c == MATCH_YES) |
6925 | { |
6926 | /* Now see if a result clause followed it. */ |
6927 | is_result = match_result (function: sym, result); |
6928 | found_match = MATCH_YES; |
6929 | } |
6930 | else |
6931 | { |
6932 | /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */ |
6933 | found_match = MATCH_ERROR; |
6934 | } |
6935 | break; |
6936 | default: |
6937 | gfc_error ("Unexpected junk after function declaration at %C" ); |
6938 | found_match = MATCH_ERROR; |
6939 | break; |
6940 | } |
6941 | |
6942 | if (is_bind_c == MATCH_YES) |
6943 | { |
6944 | /* Fortran 2008 draft allows BIND(C) for internal procedures. */ |
6945 | if (gfc_current_state () == COMP_CONTAINS |
6946 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
6947 | && !gfc_notify_std (GFC_STD_F2008, "BIND(C) attribute " |
6948 | "at %L may not be specified for an internal " |
6949 | "procedure" , &gfc_current_locus)) |
6950 | return MATCH_ERROR; |
6951 | |
6952 | if (!gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1)) |
6953 | return MATCH_ERROR; |
6954 | } |
6955 | |
6956 | return found_match; |
6957 | } |
6958 | |
6959 | |
6960 | /* Procedure pointer return value without RESULT statement: |
6961 | Add "hidden" result variable named "ppr@". */ |
6962 | |
6963 | static bool |
6964 | add_hidden_procptr_result (gfc_symbol *sym) |
6965 | { |
6966 | bool case1,case2; |
6967 | |
6968 | if (gfc_notification_std (GFC_STD_F2003) == ERROR) |
6969 | return false; |
6970 | |
6971 | /* First usage case: PROCEDURE and EXTERNAL statements. */ |
6972 | case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block () |
6973 | && strcmp (gfc_current_block ()->name, s2: sym->name) == 0 |
6974 | && sym->attr.external; |
6975 | /* Second usage case: INTERFACE statements. */ |
6976 | case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous |
6977 | && gfc_state_stack->previous->state == COMP_FUNCTION |
6978 | && strcmp (s1: gfc_state_stack->previous->sym->name, s2: sym->name) == 0; |
6979 | |
6980 | if (case1 || case2) |
6981 | { |
6982 | gfc_symtree *stree; |
6983 | if (case1) |
6984 | gfc_get_sym_tree ("ppr@" , gfc_current_ns, &stree, false); |
6985 | else |
6986 | { |
6987 | gfc_symtree *st2; |
6988 | gfc_get_sym_tree ("ppr@" , gfc_current_ns->parent, &stree, false); |
6989 | st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@" ); |
6990 | st2->n.sym = stree->n.sym; |
6991 | stree->n.sym->refs++; |
6992 | } |
6993 | sym->result = stree->n.sym; |
6994 | |
6995 | sym->result->attr.proc_pointer = sym->attr.proc_pointer; |
6996 | sym->result->attr.pointer = sym->attr.pointer; |
6997 | sym->result->attr.external = sym->attr.external; |
6998 | sym->result->attr.referenced = sym->attr.referenced; |
6999 | sym->result->ts = sym->ts; |
7000 | sym->attr.proc_pointer = 0; |
7001 | sym->attr.pointer = 0; |
7002 | sym->attr.external = 0; |
7003 | if (sym->result->attr.external && sym->result->attr.pointer) |
7004 | { |
7005 | sym->result->attr.pointer = 0; |
7006 | sym->result->attr.proc_pointer = 1; |
7007 | } |
7008 | |
7009 | return gfc_add_result (&sym->result->attr, sym->result->name, NULL); |
7010 | } |
7011 | /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */ |
7012 | else if (sym->attr.function && !sym->attr.external && sym->attr.pointer |
7013 | && sym->result && sym->result != sym && sym->result->attr.external |
7014 | && sym == gfc_current_ns->proc_name |
7015 | && sym == sym->result->ns->proc_name |
7016 | && strcmp (s1: "ppr@" , s2: sym->result->name) == 0) |
7017 | { |
7018 | sym->result->attr.proc_pointer = 1; |
7019 | sym->attr.pointer = 0; |
7020 | return true; |
7021 | } |
7022 | else |
7023 | return false; |
7024 | } |
7025 | |
7026 | |
7027 | /* Match the interface for a PROCEDURE declaration, |
7028 | including brackets (R1212). */ |
7029 | |
7030 | static match |
7031 | match_procedure_interface (gfc_symbol **proc_if) |
7032 | { |
7033 | match m; |
7034 | gfc_symtree *st; |
7035 | locus old_loc, entry_loc; |
7036 | gfc_namespace *old_ns = gfc_current_ns; |
7037 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
7038 | |
7039 | old_loc = entry_loc = gfc_current_locus; |
7040 | gfc_clear_ts (¤t_ts); |
7041 | |
7042 | if (gfc_match (" (" ) != MATCH_YES) |
7043 | { |
7044 | gfc_current_locus = entry_loc; |
7045 | return MATCH_NO; |
7046 | } |
7047 | |
7048 | /* Get the type spec. for the procedure interface. */ |
7049 | old_loc = gfc_current_locus; |
7050 | m = gfc_match_decl_type_spec (ts: ¤t_ts, implicit_flag: 0); |
7051 | gfc_gobble_whitespace (); |
7052 | if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')')) |
7053 | goto got_ts; |
7054 | |
7055 | if (m == MATCH_ERROR) |
7056 | return m; |
7057 | |
7058 | /* Procedure interface is itself a procedure. */ |
7059 | gfc_current_locus = old_loc; |
7060 | m = gfc_match_name (name); |
7061 | |
7062 | /* First look to see if it is already accessible in the current |
7063 | namespace because it is use associated or contained. */ |
7064 | st = NULL; |
7065 | if (gfc_find_sym_tree (name, NULL, 0, &st)) |
7066 | return MATCH_ERROR; |
7067 | |
7068 | /* If it is still not found, then try the parent namespace, if it |
7069 | exists and create the symbol there if it is still not found. */ |
7070 | if (gfc_current_ns->parent) |
7071 | gfc_current_ns = gfc_current_ns->parent; |
7072 | if (st == NULL && gfc_get_ha_sym_tree (name, &st)) |
7073 | return MATCH_ERROR; |
7074 | |
7075 | gfc_current_ns = old_ns; |
7076 | *proc_if = st->n.sym; |
7077 | |
7078 | if (*proc_if) |
7079 | { |
7080 | (*proc_if)->refs++; |
7081 | /* Resolve interface if possible. That way, attr.procedure is only set |
7082 | if it is declared by a later procedure-declaration-stmt, which is |
7083 | invalid per F08:C1216 (cf. resolve_procedure_interface). */ |
7084 | while ((*proc_if)->ts.interface |
7085 | && *proc_if != (*proc_if)->ts.interface) |
7086 | *proc_if = (*proc_if)->ts.interface; |
7087 | |
7088 | if ((*proc_if)->attr.flavor == FL_UNKNOWN |
7089 | && (*proc_if)->ts.type == BT_UNKNOWN |
7090 | && !gfc_add_flavor (&(*proc_if)->attr, FL_PROCEDURE, |
7091 | (*proc_if)->name, NULL)) |
7092 | return MATCH_ERROR; |
7093 | } |
7094 | |
7095 | got_ts: |
7096 | if (gfc_match (" )" ) != MATCH_YES) |
7097 | { |
7098 | gfc_current_locus = entry_loc; |
7099 | return MATCH_NO; |
7100 | } |
7101 | |
7102 | return MATCH_YES; |
7103 | } |
7104 | |
7105 | |
7106 | /* Match a PROCEDURE declaration (R1211). */ |
7107 | |
7108 | static match |
7109 | match_procedure_decl (void) |
7110 | { |
7111 | match m; |
7112 | gfc_symbol *sym, *proc_if = NULL; |
7113 | int num; |
7114 | gfc_expr *initializer = NULL; |
7115 | |
7116 | /* Parse interface (with brackets). */ |
7117 | m = match_procedure_interface (proc_if: &proc_if); |
7118 | if (m != MATCH_YES) |
7119 | return m; |
7120 | |
7121 | /* Parse attributes (with colons). */ |
7122 | m = match_attr_spec(); |
7123 | if (m == MATCH_ERROR) |
7124 | return MATCH_ERROR; |
7125 | |
7126 | if (proc_if && proc_if->attr.is_bind_c && !current_attr.is_bind_c) |
7127 | { |
7128 | current_attr.is_bind_c = 1; |
7129 | has_name_equals = 0; |
7130 | curr_binding_label = NULL; |
7131 | } |
7132 | |
7133 | /* Get procedure symbols. */ |
7134 | for(num=1;;num++) |
7135 | { |
7136 | m = gfc_match_symbol (&sym, 0); |
7137 | if (m == MATCH_NO) |
7138 | goto syntax; |
7139 | else if (m == MATCH_ERROR) |
7140 | return m; |
7141 | |
7142 | /* Add current_attr to the symbol attributes. */ |
7143 | if (!gfc_copy_attr (&sym->attr, ¤t_attr, NULL)) |
7144 | return MATCH_ERROR; |
7145 | |
7146 | if (sym->attr.is_bind_c) |
7147 | { |
7148 | /* Check for C1218. */ |
7149 | if (!proc_if || !proc_if->attr.is_bind_c) |
7150 | { |
7151 | gfc_error ("BIND(C) attribute at %C requires " |
7152 | "an interface with BIND(C)" ); |
7153 | return MATCH_ERROR; |
7154 | } |
7155 | /* Check for C1217. */ |
7156 | if (has_name_equals && sym->attr.pointer) |
7157 | { |
7158 | gfc_error ("BIND(C) procedure with NAME may not have " |
7159 | "POINTER attribute at %C" ); |
7160 | return MATCH_ERROR; |
7161 | } |
7162 | if (has_name_equals && sym->attr.dummy) |
7163 | { |
7164 | gfc_error ("Dummy procedure at %C may not have " |
7165 | "BIND(C) attribute with NAME" ); |
7166 | return MATCH_ERROR; |
7167 | } |
7168 | /* Set binding label for BIND(C). */ |
7169 | if (!set_binding_label (dest_label: &sym->binding_label, sym_name: sym->name, num_idents: num)) |
7170 | return MATCH_ERROR; |
7171 | } |
7172 | |
7173 | if (!gfc_add_external (&sym->attr, NULL)) |
7174 | return MATCH_ERROR; |
7175 | |
7176 | if (add_hidden_procptr_result (sym)) |
7177 | sym = sym->result; |
7178 | |
7179 | if (!gfc_add_proc (attr: &sym->attr, name: sym->name, NULL)) |
7180 | return MATCH_ERROR; |
7181 | |
7182 | /* Set interface. */ |
7183 | if (proc_if != NULL) |
7184 | { |
7185 | if (sym->ts.type != BT_UNKNOWN) |
7186 | { |
7187 | gfc_error ("Procedure %qs at %L already has basic type of %s" , |
7188 | sym->name, &gfc_current_locus, |
7189 | gfc_basic_typename (sym->ts.type)); |
7190 | return MATCH_ERROR; |
7191 | } |
7192 | sym->ts.interface = proc_if; |
7193 | sym->attr.untyped = 1; |
7194 | sym->attr.if_source = IFSRC_IFBODY; |
7195 | } |
7196 | else if (current_ts.type != BT_UNKNOWN) |
7197 | { |
7198 | if (!gfc_add_type (sym, ¤t_ts, &gfc_current_locus)) |
7199 | return MATCH_ERROR; |
7200 | sym->ts.interface = gfc_new_symbol ("" , gfc_current_ns); |
7201 | sym->ts.interface->ts = current_ts; |
7202 | sym->ts.interface->attr.flavor = FL_PROCEDURE; |
7203 | sym->ts.interface->attr.function = 1; |
7204 | sym->attr.function = 1; |
7205 | sym->attr.if_source = IFSRC_UNKNOWN; |
7206 | } |
7207 | |
7208 | if (gfc_match (" =>" ) == MATCH_YES) |
7209 | { |
7210 | if (!current_attr.pointer) |
7211 | { |
7212 | gfc_error ("Initialization at %C isn't for a pointer variable" ); |
7213 | m = MATCH_ERROR; |
7214 | goto cleanup; |
7215 | } |
7216 | |
7217 | m = match_pointer_init (init: &initializer, procptr: 1); |
7218 | if (m != MATCH_YES) |
7219 | goto cleanup; |
7220 | |
7221 | if (!add_init_expr_to_sym (name: sym->name, initp: &initializer, var_locus: &gfc_current_locus)) |
7222 | goto cleanup; |
7223 | |
7224 | } |
7225 | |
7226 | if (gfc_match_eos () == MATCH_YES) |
7227 | return MATCH_YES; |
7228 | if (gfc_match_char (',') != MATCH_YES) |
7229 | goto syntax; |
7230 | } |
7231 | |
7232 | syntax: |
7233 | gfc_error ("Syntax error in PROCEDURE statement at %C" ); |
7234 | return MATCH_ERROR; |
7235 | |
7236 | cleanup: |
7237 | /* Free stuff up and return. */ |
7238 | gfc_free_expr (initializer); |
7239 | return m; |
7240 | } |
7241 | |
7242 | |
7243 | static match |
7244 | match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc); |
7245 | |
7246 | |
7247 | /* Match a procedure pointer component declaration (R445). */ |
7248 | |
7249 | static match |
7250 | match_ppc_decl (void) |
7251 | { |
7252 | match m; |
7253 | gfc_symbol *proc_if = NULL; |
7254 | gfc_typespec ts; |
7255 | int num; |
7256 | gfc_component *c; |
7257 | gfc_expr *initializer = NULL; |
7258 | gfc_typebound_proc* tb; |
7259 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
7260 | |
7261 | /* Parse interface (with brackets). */ |
7262 | m = match_procedure_interface (proc_if: &proc_if); |
7263 | if (m != MATCH_YES) |
7264 | goto syntax; |
7265 | |
7266 | /* Parse attributes. */ |
7267 | tb = XCNEW (gfc_typebound_proc); |
7268 | tb->where = gfc_current_locus; |
7269 | m = match_binding_attributes (ba: tb, generic: false, ppc: true); |
7270 | if (m == MATCH_ERROR) |
7271 | return m; |
7272 | |
7273 | gfc_clear_attr (¤t_attr); |
7274 | current_attr.procedure = 1; |
7275 | current_attr.proc_pointer = 1; |
7276 | current_attr.access = tb->access; |
7277 | current_attr.flavor = FL_PROCEDURE; |
7278 | |
7279 | /* Match the colons (required). */ |
7280 | if (gfc_match (" ::" ) != MATCH_YES) |
7281 | { |
7282 | gfc_error ("Expected %<::%> after binding-attributes at %C" ); |
7283 | return MATCH_ERROR; |
7284 | } |
7285 | |
7286 | /* Check for C450. */ |
7287 | if (!tb->nopass && proc_if == NULL) |
7288 | { |
7289 | gfc_error("NOPASS or explicit interface required at %C" ); |
7290 | return MATCH_ERROR; |
7291 | } |
7292 | |
7293 | if (!gfc_notify_std (GFC_STD_F2003, "Procedure pointer component at %C" )) |
7294 | return MATCH_ERROR; |
7295 | |
7296 | /* Match PPC names. */ |
7297 | ts = current_ts; |
7298 | for(num=1;;num++) |
7299 | { |
7300 | m = gfc_match_name (name); |
7301 | if (m == MATCH_NO) |
7302 | goto syntax; |
7303 | else if (m == MATCH_ERROR) |
7304 | return m; |
7305 | |
7306 | if (!gfc_add_component (gfc_current_block(), name, &c)) |
7307 | return MATCH_ERROR; |
7308 | |
7309 | /* Add current_attr to the symbol attributes. */ |
7310 | if (!gfc_copy_attr (&c->attr, ¤t_attr, NULL)) |
7311 | return MATCH_ERROR; |
7312 | |
7313 | if (!gfc_add_external (&c->attr, NULL)) |
7314 | return MATCH_ERROR; |
7315 | |
7316 | if (!gfc_add_proc (attr: &c->attr, name, NULL)) |
7317 | return MATCH_ERROR; |
7318 | |
7319 | if (num == 1) |
7320 | c->tb = tb; |
7321 | else |
7322 | { |
7323 | c->tb = XCNEW (gfc_typebound_proc); |
7324 | c->tb->where = gfc_current_locus; |
7325 | *c->tb = *tb; |
7326 | } |
7327 | |
7328 | /* Set interface. */ |
7329 | if (proc_if != NULL) |
7330 | { |
7331 | c->ts.interface = proc_if; |
7332 | c->attr.untyped = 1; |
7333 | c->attr.if_source = IFSRC_IFBODY; |
7334 | } |
7335 | else if (ts.type != BT_UNKNOWN) |
7336 | { |
7337 | c->ts = ts; |
7338 | c->ts.interface = gfc_new_symbol ("" , gfc_current_ns); |
7339 | c->ts.interface->result = c->ts.interface; |
7340 | c->ts.interface->ts = ts; |
7341 | c->ts.interface->attr.flavor = FL_PROCEDURE; |
7342 | c->ts.interface->attr.function = 1; |
7343 | c->attr.function = 1; |
7344 | c->attr.if_source = IFSRC_UNKNOWN; |
7345 | } |
7346 | |
7347 | if (gfc_match (" =>" ) == MATCH_YES) |
7348 | { |
7349 | m = match_pointer_init (init: &initializer, procptr: 1); |
7350 | if (m != MATCH_YES) |
7351 | { |
7352 | gfc_free_expr (initializer); |
7353 | return m; |
7354 | } |
7355 | c->initializer = initializer; |
7356 | } |
7357 | |
7358 | if (gfc_match_eos () == MATCH_YES) |
7359 | return MATCH_YES; |
7360 | if (gfc_match_char (',') != MATCH_YES) |
7361 | goto syntax; |
7362 | } |
7363 | |
7364 | syntax: |
7365 | gfc_error ("Syntax error in procedure pointer component at %C" ); |
7366 | return MATCH_ERROR; |
7367 | } |
7368 | |
7369 | |
7370 | /* Match a PROCEDURE declaration inside an interface (R1206). */ |
7371 | |
7372 | static match |
7373 | match_procedure_in_interface (void) |
7374 | { |
7375 | match m; |
7376 | gfc_symbol *sym; |
7377 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
7378 | locus old_locus; |
7379 | |
7380 | if (current_interface.type == INTERFACE_NAMELESS |
7381 | || current_interface.type == INTERFACE_ABSTRACT) |
7382 | { |
7383 | gfc_error ("PROCEDURE at %C must be in a generic interface" ); |
7384 | return MATCH_ERROR; |
7385 | } |
7386 | |
7387 | /* Check if the F2008 optional double colon appears. */ |
7388 | gfc_gobble_whitespace (); |
7389 | old_locus = gfc_current_locus; |
7390 | if (gfc_match ("::" ) == MATCH_YES) |
7391 | { |
7392 | if (!gfc_notify_std (GFC_STD_F2008, "double colon in " |
7393 | "MODULE PROCEDURE statement at %L" , &old_locus)) |
7394 | return MATCH_ERROR; |
7395 | } |
7396 | else |
7397 | gfc_current_locus = old_locus; |
7398 | |
7399 | for(;;) |
7400 | { |
7401 | m = gfc_match_name (name); |
7402 | if (m == MATCH_NO) |
7403 | goto syntax; |
7404 | else if (m == MATCH_ERROR) |
7405 | return m; |
7406 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) |
7407 | return MATCH_ERROR; |
7408 | |
7409 | if (!gfc_add_interface (sym)) |
7410 | return MATCH_ERROR; |
7411 | |
7412 | if (gfc_match_eos () == MATCH_YES) |
7413 | break; |
7414 | if (gfc_match_char (',') != MATCH_YES) |
7415 | goto syntax; |
7416 | } |
7417 | |
7418 | return MATCH_YES; |
7419 | |
7420 | syntax: |
7421 | gfc_error ("Syntax error in PROCEDURE statement at %C" ); |
7422 | return MATCH_ERROR; |
7423 | } |
7424 | |
7425 | |
7426 | /* General matcher for PROCEDURE declarations. */ |
7427 | |
7428 | static match match_procedure_in_type (void); |
7429 | |
7430 | match |
7431 | gfc_match_procedure (void) |
7432 | { |
7433 | match m; |
7434 | |
7435 | switch (gfc_current_state ()) |
7436 | { |
7437 | case COMP_NONE: |
7438 | case COMP_PROGRAM: |
7439 | case COMP_MODULE: |
7440 | case COMP_SUBMODULE: |
7441 | case COMP_SUBROUTINE: |
7442 | case COMP_FUNCTION: |
7443 | case COMP_BLOCK: |
7444 | m = match_procedure_decl (); |
7445 | break; |
7446 | case COMP_INTERFACE: |
7447 | m = match_procedure_in_interface (); |
7448 | break; |
7449 | case COMP_DERIVED: |
7450 | m = match_ppc_decl (); |
7451 | break; |
7452 | case COMP_DERIVED_CONTAINS: |
7453 | m = match_procedure_in_type (); |
7454 | break; |
7455 | default: |
7456 | return MATCH_NO; |
7457 | } |
7458 | |
7459 | if (m != MATCH_YES) |
7460 | return m; |
7461 | |
7462 | if (!gfc_notify_std (GFC_STD_F2003, "PROCEDURE statement at %C" )) |
7463 | return MATCH_ERROR; |
7464 | |
7465 | return m; |
7466 | } |
7467 | |
7468 | |
7469 | /* Warn if a matched procedure has the same name as an intrinsic; this is |
7470 | simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current |
7471 | parser-state-stack to find out whether we're in a module. */ |
7472 | |
7473 | static void |
7474 | do_warn_intrinsic_shadow (const gfc_symbol* sym, bool func) |
7475 | { |
7476 | bool in_module; |
7477 | |
7478 | in_module = (gfc_state_stack->previous |
7479 | && (gfc_state_stack->previous->state == COMP_MODULE |
7480 | || gfc_state_stack->previous->state == COMP_SUBMODULE)); |
7481 | |
7482 | gfc_warn_intrinsic_shadow (sym, in_module, func); |
7483 | } |
7484 | |
7485 | |
7486 | /* Match a function declaration. */ |
7487 | |
7488 | match |
7489 | gfc_match_function_decl (void) |
7490 | { |
7491 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
7492 | gfc_symbol *sym, *result; |
7493 | locus old_loc; |
7494 | match m; |
7495 | match suffix_match; |
7496 | match found_match; /* Status returned by match func. */ |
7497 | |
7498 | if (gfc_current_state () != COMP_NONE |
7499 | && gfc_current_state () != COMP_INTERFACE |
7500 | && gfc_current_state () != COMP_CONTAINS) |
7501 | return MATCH_NO; |
7502 | |
7503 | gfc_clear_ts (¤t_ts); |
7504 | |
7505 | old_loc = gfc_current_locus; |
7506 | |
7507 | m = gfc_match_prefix (ts: ¤t_ts); |
7508 | if (m != MATCH_YES) |
7509 | { |
7510 | gfc_current_locus = old_loc; |
7511 | return m; |
7512 | } |
7513 | |
7514 | if (gfc_match ("function% %n" , name) != MATCH_YES) |
7515 | { |
7516 | gfc_current_locus = old_loc; |
7517 | return MATCH_NO; |
7518 | } |
7519 | |
7520 | if (get_proc_name (name, result: &sym, module_fcn_entry: false)) |
7521 | return MATCH_ERROR; |
7522 | |
7523 | if (add_hidden_procptr_result (sym)) |
7524 | sym = sym->result; |
7525 | |
7526 | if (current_attr.module_procedure) |
7527 | sym->attr.module_procedure = 1; |
7528 | |
7529 | gfc_new_block = sym; |
7530 | |
7531 | m = gfc_match_formal_arglist (progname: sym, st_flag: 0, null_flag: 0); |
7532 | if (m == MATCH_NO) |
7533 | { |
7534 | gfc_error ("Expected formal argument list in function " |
7535 | "definition at %C" ); |
7536 | m = MATCH_ERROR; |
7537 | goto cleanup; |
7538 | } |
7539 | else if (m == MATCH_ERROR) |
7540 | goto cleanup; |
7541 | |
7542 | result = NULL; |
7543 | |
7544 | /* According to the draft, the bind(c) and result clause can |
7545 | come in either order after the formal_arg_list (i.e., either |
7546 | can be first, both can exist together or by themselves or neither |
7547 | one). Therefore, the match_result can't match the end of the |
7548 | string, and check for the bind(c) or result clause in either order. */ |
7549 | found_match = gfc_match_eos (); |
7550 | |
7551 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
7552 | must have been marked BIND(C) with a BIND(C) attribute and that is |
7553 | not allowed for procedures. */ |
7554 | if (sym->attr.is_bind_c == 1) |
7555 | { |
7556 | sym->attr.is_bind_c = 0; |
7557 | |
7558 | if (gfc_state_stack->previous |
7559 | && gfc_state_stack->previous->state != COMP_SUBMODULE) |
7560 | { |
7561 | locus loc; |
7562 | loc = sym->old_symbol != NULL |
7563 | ? sym->old_symbol->declared_at : gfc_current_locus; |
7564 | gfc_error_now ("BIND(C) attribute at %L can only be used for " |
7565 | "variables or common blocks" , &loc); |
7566 | } |
7567 | } |
7568 | |
7569 | if (found_match != MATCH_YES) |
7570 | { |
7571 | /* If we haven't found the end-of-statement, look for a suffix. */ |
7572 | suffix_match = gfc_match_suffix (sym, result: &result); |
7573 | if (suffix_match == MATCH_YES) |
7574 | /* Need to get the eos now. */ |
7575 | found_match = gfc_match_eos (); |
7576 | else |
7577 | found_match = suffix_match; |
7578 | } |
7579 | |
7580 | /* F2018 C1550 (R1526) If MODULE appears in the prefix of a module |
7581 | subprogram and a binding label is specified, it shall be the |
7582 | same as the binding label specified in the corresponding module |
7583 | procedure interface body. */ |
7584 | if (sym->attr.is_bind_c && sym->attr.module_procedure && sym->old_symbol |
7585 | && strcmp (s1: sym->name, s2: sym->old_symbol->name) == 0 |
7586 | && sym->binding_label && sym->old_symbol->binding_label |
7587 | && strcmp (s1: sym->binding_label, s2: sym->old_symbol->binding_label) != 0) |
7588 | { |
7589 | const char *null = "NULL" , *s1, *s2; |
7590 | s1 = sym->binding_label; |
7591 | if (!s1) s1 = null; |
7592 | s2 = sym->old_symbol->binding_label; |
7593 | if (!s2) s2 = null; |
7594 | gfc_error ("Mismatch in BIND(C) names (%qs/%qs) at %C" , s1, s2); |
7595 | sym->refs++; /* Needed to avoid an ICE in gfc_release_symbol */ |
7596 | return MATCH_ERROR; |
7597 | } |
7598 | |
7599 | if(found_match != MATCH_YES) |
7600 | m = MATCH_ERROR; |
7601 | else |
7602 | { |
7603 | /* Make changes to the symbol. */ |
7604 | m = MATCH_ERROR; |
7605 | |
7606 | if (!gfc_add_function (&sym->attr, sym->name, NULL)) |
7607 | goto cleanup; |
7608 | |
7609 | if (!gfc_missing_attr (&sym->attr, NULL)) |
7610 | goto cleanup; |
7611 | |
7612 | if (!copy_prefix (dest: &sym->attr, where: &sym->declared_at)) |
7613 | { |
7614 | if(!sym->attr.module_procedure) |
7615 | goto cleanup; |
7616 | else |
7617 | gfc_error_check (); |
7618 | } |
7619 | |
7620 | /* Delay matching the function characteristics until after the |
7621 | specification block by signalling kind=-1. */ |
7622 | sym->declared_at = old_loc; |
7623 | if (current_ts.type != BT_UNKNOWN) |
7624 | current_ts.kind = -1; |
7625 | else |
7626 | current_ts.kind = 0; |
7627 | |
7628 | if (result == NULL) |
7629 | { |
7630 | if (current_ts.type != BT_UNKNOWN |
7631 | && !gfc_add_type (sym, ¤t_ts, &gfc_current_locus)) |
7632 | goto cleanup; |
7633 | sym->result = sym; |
7634 | } |
7635 | else |
7636 | { |
7637 | if (current_ts.type != BT_UNKNOWN |
7638 | && !gfc_add_type (result, ¤t_ts, &gfc_current_locus)) |
7639 | goto cleanup; |
7640 | sym->result = result; |
7641 | } |
7642 | |
7643 | /* Warn if this procedure has the same name as an intrinsic. */ |
7644 | do_warn_intrinsic_shadow (sym, func: true); |
7645 | |
7646 | return MATCH_YES; |
7647 | } |
7648 | |
7649 | cleanup: |
7650 | gfc_current_locus = old_loc; |
7651 | return m; |
7652 | } |
7653 | |
7654 | |
7655 | /* This is mostly a copy of parse.cc(add_global_procedure) but modified to |
7656 | pass the name of the entry, rather than the gfc_current_block name, and |
7657 | to return false upon finding an existing global entry. */ |
7658 | |
7659 | static bool |
7660 | add_global_entry (const char *name, const char *binding_label, bool sub, |
7661 | locus *where) |
7662 | { |
7663 | gfc_gsymbol *s; |
7664 | enum gfc_symbol_type type; |
7665 | |
7666 | type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; |
7667 | |
7668 | /* Only in Fortran 2003: For procedures with a binding label also the Fortran |
7669 | name is a global identifier. */ |
7670 | if (!binding_label || gfc_notification_std (GFC_STD_F2008)) |
7671 | { |
7672 | s = gfc_get_gsymbol (name, bind_c: false); |
7673 | |
7674 | if (s->defined || (s->type != GSYM_UNKNOWN && s->type != type)) |
7675 | { |
7676 | gfc_global_used (s, where); |
7677 | return false; |
7678 | } |
7679 | else |
7680 | { |
7681 | s->type = type; |
7682 | s->sym_name = name; |
7683 | s->where = *where; |
7684 | s->defined = 1; |
7685 | s->ns = gfc_current_ns; |
7686 | } |
7687 | } |
7688 | |
7689 | /* Don't add the symbol multiple times. */ |
7690 | if (binding_label |
7691 | && (!gfc_notification_std (GFC_STD_F2008) |
7692 | || strcmp (s1: name, s2: binding_label) != 0)) |
7693 | { |
7694 | s = gfc_get_gsymbol (binding_label, bind_c: true); |
7695 | |
7696 | if (s->defined || (s->type != GSYM_UNKNOWN && s->type != type)) |
7697 | { |
7698 | gfc_global_used (s, where); |
7699 | return false; |
7700 | } |
7701 | else |
7702 | { |
7703 | s->type = type; |
7704 | s->sym_name = name; |
7705 | s->binding_label = binding_label; |
7706 | s->where = *where; |
7707 | s->defined = 1; |
7708 | s->ns = gfc_current_ns; |
7709 | } |
7710 | } |
7711 | |
7712 | return true; |
7713 | } |
7714 | |
7715 | |
7716 | /* Match an ENTRY statement. */ |
7717 | |
7718 | match |
7719 | gfc_match_entry (void) |
7720 | { |
7721 | gfc_symbol *proc; |
7722 | gfc_symbol *result; |
7723 | gfc_symbol *entry; |
7724 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
7725 | gfc_compile_state state; |
7726 | match m; |
7727 | gfc_entry_list *el; |
7728 | locus old_loc; |
7729 | bool module_procedure; |
7730 | char peek_char; |
7731 | match is_bind_c; |
7732 | |
7733 | m = gfc_match_name (name); |
7734 | if (m != MATCH_YES) |
7735 | return m; |
7736 | |
7737 | if (!gfc_notify_std (GFC_STD_F2008_OBS, "ENTRY statement at %C" )) |
7738 | return MATCH_ERROR; |
7739 | |
7740 | state = gfc_current_state (); |
7741 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
7742 | { |
7743 | switch (state) |
7744 | { |
7745 | case COMP_PROGRAM: |
7746 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM" ); |
7747 | break; |
7748 | case COMP_MODULE: |
7749 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE" ); |
7750 | break; |
7751 | case COMP_SUBMODULE: |
7752 | gfc_error ("ENTRY statement at %C cannot appear within a SUBMODULE" ); |
7753 | break; |
7754 | case COMP_BLOCK_DATA: |
7755 | gfc_error ("ENTRY statement at %C cannot appear within " |
7756 | "a BLOCK DATA" ); |
7757 | break; |
7758 | case COMP_INTERFACE: |
7759 | gfc_error ("ENTRY statement at %C cannot appear within " |
7760 | "an INTERFACE" ); |
7761 | break; |
7762 | case COMP_STRUCTURE: |
7763 | gfc_error ("ENTRY statement at %C cannot appear within " |
7764 | "a STRUCTURE block" ); |
7765 | break; |
7766 | case COMP_DERIVED: |
7767 | gfc_error ("ENTRY statement at %C cannot appear within " |
7768 | "a DERIVED TYPE block" ); |
7769 | break; |
7770 | case COMP_IF: |
7771 | gfc_error ("ENTRY statement at %C cannot appear within " |
7772 | "an IF-THEN block" ); |
7773 | break; |
7774 | case COMP_DO: |
7775 | case COMP_DO_CONCURRENT: |
7776 | gfc_error ("ENTRY statement at %C cannot appear within " |
7777 | "a DO block" ); |
7778 | break; |
7779 | case COMP_SELECT: |
7780 | gfc_error ("ENTRY statement at %C cannot appear within " |
7781 | "a SELECT block" ); |
7782 | break; |
7783 | case COMP_FORALL: |
7784 | gfc_error ("ENTRY statement at %C cannot appear within " |
7785 | "a FORALL block" ); |
7786 | break; |
7787 | case COMP_WHERE: |
7788 | gfc_error ("ENTRY statement at %C cannot appear within " |
7789 | "a WHERE block" ); |
7790 | break; |
7791 | case COMP_CONTAINS: |
7792 | gfc_error ("ENTRY statement at %C cannot appear within " |
7793 | "a contained subprogram" ); |
7794 | break; |
7795 | default: |
7796 | gfc_error ("Unexpected ENTRY statement at %C" ); |
7797 | } |
7798 | return MATCH_ERROR; |
7799 | } |
7800 | |
7801 | if ((state == COMP_SUBROUTINE || state == COMP_FUNCTION) |
7802 | && gfc_state_stack->previous->state == COMP_INTERFACE) |
7803 | { |
7804 | gfc_error ("ENTRY statement at %C cannot appear within an INTERFACE" ); |
7805 | return MATCH_ERROR; |
7806 | } |
7807 | |
7808 | module_procedure = gfc_current_ns->parent != NULL |
7809 | && gfc_current_ns->parent->proc_name |
7810 | && gfc_current_ns->parent->proc_name->attr.flavor |
7811 | == FL_MODULE; |
7812 | |
7813 | if (gfc_current_ns->parent != NULL |
7814 | && gfc_current_ns->parent->proc_name |
7815 | && !module_procedure) |
7816 | { |
7817 | gfc_error("ENTRY statement at %C cannot appear in a " |
7818 | "contained procedure" ); |
7819 | return MATCH_ERROR; |
7820 | } |
7821 | |
7822 | /* Module function entries need special care in get_proc_name |
7823 | because previous references within the function will have |
7824 | created symbols attached to the current namespace. */ |
7825 | if (get_proc_name (name, result: &entry, |
7826 | module_fcn_entry: gfc_current_ns->parent != NULL |
7827 | && module_procedure)) |
7828 | return MATCH_ERROR; |
7829 | |
7830 | proc = gfc_current_block (); |
7831 | |
7832 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
7833 | must have been marked BIND(C) with a BIND(C) attribute and that is |
7834 | not allowed for procedures. */ |
7835 | if (entry->attr.is_bind_c == 1) |
7836 | { |
7837 | locus loc; |
7838 | |
7839 | entry->attr.is_bind_c = 0; |
7840 | |
7841 | loc = entry->old_symbol != NULL |
7842 | ? entry->old_symbol->declared_at : gfc_current_locus; |
7843 | gfc_error_now ("BIND(C) attribute at %L can only be used for " |
7844 | "variables or common blocks" , &loc); |
7845 | } |
7846 | |
7847 | /* Check what next non-whitespace character is so we can tell if there |
7848 | is the required parens if we have a BIND(C). */ |
7849 | old_loc = gfc_current_locus; |
7850 | gfc_gobble_whitespace (); |
7851 | peek_char = gfc_peek_ascii_char (); |
7852 | |
7853 | if (state == COMP_SUBROUTINE) |
7854 | { |
7855 | m = gfc_match_formal_arglist (progname: entry, st_flag: 0, null_flag: 1); |
7856 | if (m != MATCH_YES) |
7857 | return MATCH_ERROR; |
7858 | |
7859 | /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can |
7860 | never be an internal procedure. */ |
7861 | is_bind_c = gfc_match_bind_c (entry, true); |
7862 | if (is_bind_c == MATCH_ERROR) |
7863 | return MATCH_ERROR; |
7864 | if (is_bind_c == MATCH_YES) |
7865 | { |
7866 | if (peek_char != '(') |
7867 | { |
7868 | gfc_error ("Missing required parentheses before BIND(C) at %C" ); |
7869 | return MATCH_ERROR; |
7870 | } |
7871 | |
7872 | if (!gfc_add_is_bind_c (&(entry->attr), entry->name, |
7873 | &(entry->declared_at), 1)) |
7874 | return MATCH_ERROR; |
7875 | |
7876 | } |
7877 | |
7878 | if (!gfc_current_ns->parent |
7879 | && !add_global_entry (name, binding_label: entry->binding_label, sub: true, |
7880 | where: &old_loc)) |
7881 | return MATCH_ERROR; |
7882 | |
7883 | /* An entry in a subroutine. */ |
7884 | if (!gfc_add_entry (&entry->attr, entry->name, NULL) |
7885 | || !gfc_add_subroutine (&entry->attr, entry->name, NULL)) |
7886 | return MATCH_ERROR; |
7887 | } |
7888 | else |
7889 | { |
7890 | /* An entry in a function. |
7891 | We need to take special care because writing |
7892 | ENTRY f() |
7893 | as |
7894 | ENTRY f |
7895 | is allowed, whereas |
7896 | ENTRY f() RESULT (r) |
7897 | can't be written as |
7898 | ENTRY f RESULT (r). */ |
7899 | if (gfc_match_eos () == MATCH_YES) |
7900 | { |
7901 | gfc_current_locus = old_loc; |
7902 | /* Match the empty argument list, and add the interface to |
7903 | the symbol. */ |
7904 | m = gfc_match_formal_arglist (progname: entry, st_flag: 0, null_flag: 1); |
7905 | } |
7906 | else |
7907 | m = gfc_match_formal_arglist (progname: entry, st_flag: 0, null_flag: 0); |
7908 | |
7909 | if (m != MATCH_YES) |
7910 | return MATCH_ERROR; |
7911 | |
7912 | result = NULL; |
7913 | |
7914 | if (gfc_match_eos () == MATCH_YES) |
7915 | { |
7916 | if (!gfc_add_entry (&entry->attr, entry->name, NULL) |
7917 | || !gfc_add_function (&entry->attr, entry->name, NULL)) |
7918 | return MATCH_ERROR; |
7919 | |
7920 | entry->result = entry; |
7921 | } |
7922 | else |
7923 | { |
7924 | m = gfc_match_suffix (sym: entry, result: &result); |
7925 | if (m == MATCH_NO) |
7926 | gfc_syntax_error (ST_ENTRY); |
7927 | if (m != MATCH_YES) |
7928 | return MATCH_ERROR; |
7929 | |
7930 | if (result) |
7931 | { |
7932 | if (!gfc_add_result (&result->attr, result->name, NULL) |
7933 | || !gfc_add_entry (&entry->attr, result->name, NULL) |
7934 | || !gfc_add_function (&entry->attr, result->name, NULL)) |
7935 | return MATCH_ERROR; |
7936 | entry->result = result; |
7937 | } |
7938 | else |
7939 | { |
7940 | if (!gfc_add_entry (&entry->attr, entry->name, NULL) |
7941 | || !gfc_add_function (&entry->attr, entry->name, NULL)) |
7942 | return MATCH_ERROR; |
7943 | entry->result = entry; |
7944 | } |
7945 | } |
7946 | |
7947 | if (!gfc_current_ns->parent |
7948 | && !add_global_entry (name, binding_label: entry->binding_label, sub: false, |
7949 | where: &old_loc)) |
7950 | return MATCH_ERROR; |
7951 | } |
7952 | |
7953 | if (gfc_match_eos () != MATCH_YES) |
7954 | { |
7955 | gfc_syntax_error (ST_ENTRY); |
7956 | return MATCH_ERROR; |
7957 | } |
7958 | |
7959 | /* F2018:C1546 An elemental procedure shall not have the BIND attribute. */ |
7960 | if (proc->attr.elemental && entry->attr.is_bind_c) |
7961 | { |
7962 | gfc_error ("ENTRY statement at %L with BIND(C) prohibited in an " |
7963 | "elemental procedure" , &entry->declared_at); |
7964 | return MATCH_ERROR; |
7965 | } |
7966 | |
7967 | entry->attr.recursive = proc->attr.recursive; |
7968 | entry->attr.elemental = proc->attr.elemental; |
7969 | entry->attr.pure = proc->attr.pure; |
7970 | |
7971 | el = gfc_get_entry_list (); |
7972 | el->sym = entry; |
7973 | el->next = gfc_current_ns->entries; |
7974 | gfc_current_ns->entries = el; |
7975 | if (el->next) |
7976 | el->id = el->next->id + 1; |
7977 | else |
7978 | el->id = 1; |
7979 | |
7980 | new_st.op = EXEC_ENTRY; |
7981 | new_st.ext.entry = el; |
7982 | |
7983 | return MATCH_YES; |
7984 | } |
7985 | |
7986 | |
7987 | /* Match a subroutine statement, including optional prefixes. */ |
7988 | |
7989 | match |
7990 | gfc_match_subroutine (void) |
7991 | { |
7992 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
7993 | gfc_symbol *sym; |
7994 | match m; |
7995 | match is_bind_c; |
7996 | char peek_char; |
7997 | bool allow_binding_name; |
7998 | locus loc; |
7999 | |
8000 | if (gfc_current_state () != COMP_NONE |
8001 | && gfc_current_state () != COMP_INTERFACE |
8002 | && gfc_current_state () != COMP_CONTAINS) |
8003 | return MATCH_NO; |
8004 | |
8005 | m = gfc_match_prefix (NULL); |
8006 | if (m != MATCH_YES) |
8007 | return m; |
8008 | |
8009 | m = gfc_match ("subroutine% %n" , name); |
8010 | if (m != MATCH_YES) |
8011 | return m; |
8012 | |
8013 | if (get_proc_name (name, result: &sym, module_fcn_entry: false)) |
8014 | return MATCH_ERROR; |
8015 | |
8016 | /* Set declared_at as it might point to, e.g., a PUBLIC statement, if |
8017 | the symbol existed before. */ |
8018 | sym->declared_at = gfc_current_locus; |
8019 | |
8020 | if (current_attr.module_procedure) |
8021 | sym->attr.module_procedure = 1; |
8022 | |
8023 | if (add_hidden_procptr_result (sym)) |
8024 | sym = sym->result; |
8025 | |
8026 | gfc_new_block = sym; |
8027 | |
8028 | /* Check what next non-whitespace character is so we can tell if there |
8029 | is the required parens if we have a BIND(C). */ |
8030 | gfc_gobble_whitespace (); |
8031 | peek_char = gfc_peek_ascii_char (); |
8032 | |
8033 | if (!gfc_add_subroutine (&sym->attr, sym->name, NULL)) |
8034 | return MATCH_ERROR; |
8035 | |
8036 | if (gfc_match_formal_arglist (progname: sym, st_flag: 0, null_flag: 1) != MATCH_YES) |
8037 | return MATCH_ERROR; |
8038 | |
8039 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
8040 | must have been marked BIND(C) with a BIND(C) attribute and that is |
8041 | not allowed for procedures. */ |
8042 | if (sym->attr.is_bind_c == 1) |
8043 | { |
8044 | sym->attr.is_bind_c = 0; |
8045 | |
8046 | if (gfc_state_stack->previous |
8047 | && gfc_state_stack->previous->state != COMP_SUBMODULE) |
8048 | { |
8049 | locus loc; |
8050 | loc = sym->old_symbol != NULL |
8051 | ? sym->old_symbol->declared_at : gfc_current_locus; |
8052 | gfc_error_now ("BIND(C) attribute at %L can only be used for " |
8053 | "variables or common blocks" , &loc); |
8054 | } |
8055 | } |
8056 | |
8057 | /* C binding names are not allowed for internal procedures. */ |
8058 | if (gfc_current_state () == COMP_CONTAINS |
8059 | && sym->ns->proc_name->attr.flavor != FL_MODULE) |
8060 | allow_binding_name = false; |
8061 | else |
8062 | allow_binding_name = true; |
8063 | |
8064 | /* Here, we are just checking if it has the bind(c) attribute, and if |
8065 | so, then we need to make sure it's all correct. If it doesn't, |
8066 | we still need to continue matching the rest of the subroutine line. */ |
8067 | gfc_gobble_whitespace (); |
8068 | loc = gfc_current_locus; |
8069 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
8070 | if (is_bind_c == MATCH_ERROR) |
8071 | { |
8072 | /* There was an attempt at the bind(c), but it was wrong. An |
8073 | error message should have been printed w/in the gfc_match_bind_c |
8074 | so here we'll just return the MATCH_ERROR. */ |
8075 | return MATCH_ERROR; |
8076 | } |
8077 | |
8078 | if (is_bind_c == MATCH_YES) |
8079 | { |
8080 | gfc_formal_arglist *arg; |
8081 | |
8082 | /* The following is allowed in the Fortran 2008 draft. */ |
8083 | if (gfc_current_state () == COMP_CONTAINS |
8084 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
8085 | && !gfc_notify_std (GFC_STD_F2008, "BIND(C) attribute " |
8086 | "at %L may not be specified for an internal " |
8087 | "procedure" , &gfc_current_locus)) |
8088 | return MATCH_ERROR; |
8089 | |
8090 | if (peek_char != '(') |
8091 | { |
8092 | gfc_error ("Missing required parentheses before BIND(C) at %C" ); |
8093 | return MATCH_ERROR; |
8094 | } |
8095 | |
8096 | /* F2018 C1550 (R1526) If MODULE appears in the prefix of a module |
8097 | subprogram and a binding label is specified, it shall be the |
8098 | same as the binding label specified in the corresponding module |
8099 | procedure interface body. */ |
8100 | if (sym->attr.module_procedure && sym->old_symbol |
8101 | && strcmp (s1: sym->name, s2: sym->old_symbol->name) == 0 |
8102 | && sym->binding_label && sym->old_symbol->binding_label |
8103 | && strcmp (s1: sym->binding_label, s2: sym->old_symbol->binding_label) != 0) |
8104 | { |
8105 | const char *null = "NULL" , *s1, *s2; |
8106 | s1 = sym->binding_label; |
8107 | if (!s1) s1 = null; |
8108 | s2 = sym->old_symbol->binding_label; |
8109 | if (!s2) s2 = null; |
8110 | gfc_error ("Mismatch in BIND(C) names (%qs/%qs) at %C" , s1, s2); |
8111 | sym->refs++; /* Needed to avoid an ICE in gfc_release_symbol */ |
8112 | return MATCH_ERROR; |
8113 | } |
8114 | |
8115 | /* Scan the dummy arguments for an alternate return. */ |
8116 | for (arg = sym->formal; arg; arg = arg->next) |
8117 | if (!arg->sym) |
8118 | { |
8119 | gfc_error ("Alternate return dummy argument cannot appear in a " |
8120 | "SUBROUTINE with the BIND(C) attribute at %L" , &loc); |
8121 | return MATCH_ERROR; |
8122 | } |
8123 | |
8124 | if (!gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1)) |
8125 | return MATCH_ERROR; |
8126 | } |
8127 | |
8128 | if (gfc_match_eos () != MATCH_YES) |
8129 | { |
8130 | gfc_syntax_error (ST_SUBROUTINE); |
8131 | return MATCH_ERROR; |
8132 | } |
8133 | |
8134 | if (!copy_prefix (dest: &sym->attr, where: &sym->declared_at)) |
8135 | { |
8136 | if(!sym->attr.module_procedure) |
8137 | return MATCH_ERROR; |
8138 | else |
8139 | gfc_error_check (); |
8140 | } |
8141 | |
8142 | /* Warn if it has the same name as an intrinsic. */ |
8143 | do_warn_intrinsic_shadow (sym, func: false); |
8144 | |
8145 | return MATCH_YES; |
8146 | } |
8147 | |
8148 | |
8149 | /* Check that the NAME identifier in a BIND attribute or statement |
8150 | is conform to C identifier rules. */ |
8151 | |
8152 | match |
8153 | check_bind_name_identifier (char **name) |
8154 | { |
8155 | char *n = *name, *p; |
8156 | |
8157 | /* Remove leading spaces. */ |
8158 | while (*n == ' ') |
8159 | n++; |
8160 | |
8161 | /* On an empty string, free memory and set name to NULL. */ |
8162 | if (*n == '\0') |
8163 | { |
8164 | free (ptr: *name); |
8165 | *name = NULL; |
8166 | return MATCH_YES; |
8167 | } |
8168 | |
8169 | /* Remove trailing spaces. */ |
8170 | p = n + strlen(s: n) - 1; |
8171 | while (*p == ' ') |
8172 | *(p--) = '\0'; |
8173 | |
8174 | /* Insert the identifier into the symbol table. */ |
8175 | p = xstrdup (n); |
8176 | free (ptr: *name); |
8177 | *name = p; |
8178 | |
8179 | /* Now check that identifier is valid under C rules. */ |
8180 | if (ISDIGIT (*p)) |
8181 | { |
8182 | gfc_error ("Invalid C identifier in NAME= specifier at %C" ); |
8183 | return MATCH_ERROR; |
8184 | } |
8185 | |
8186 | for (; *p; p++) |
8187 | if (!(ISALNUM (*p) || *p == '_' || *p == '$')) |
8188 | { |
8189 | gfc_error ("Invalid C identifier in NAME= specifier at %C" ); |
8190 | return MATCH_ERROR; |
8191 | } |
8192 | |
8193 | return MATCH_YES; |
8194 | } |
8195 | |
8196 | |
8197 | /* Match a BIND(C) specifier, with the optional 'name=' specifier if |
8198 | given, and set the binding label in either the given symbol (if not |
8199 | NULL), or in the current_ts. The symbol may be NULL because we may |
8200 | encounter the BIND(C) before the declaration itself. Return |
8201 | MATCH_NO if what we're looking at isn't a BIND(C) specifier, |
8202 | MATCH_ERROR if it is a BIND(C) clause but an error was encountered, |
8203 | or MATCH_YES if the specifier was correct and the binding label and |
8204 | bind(c) fields were set correctly for the given symbol or the |
8205 | current_ts. If allow_binding_name is false, no binding name may be |
8206 | given. */ |
8207 | |
8208 | match |
8209 | gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name) |
8210 | { |
8211 | char *binding_label = NULL; |
8212 | gfc_expr *e = NULL; |
8213 | |
8214 | /* Initialize the flag that specifies whether we encountered a NAME= |
8215 | specifier or not. */ |
8216 | has_name_equals = 0; |
8217 | |
8218 | /* This much we have to be able to match, in this order, if |
8219 | there is a bind(c) label. */ |
8220 | if (gfc_match (" bind ( c " ) != MATCH_YES) |
8221 | return MATCH_NO; |
8222 | |
8223 | /* Now see if there is a binding label, or if we've reached the |
8224 | end of the bind(c) attribute without one. */ |
8225 | if (gfc_match_char (',') == MATCH_YES) |
8226 | { |
8227 | if (gfc_match (" name = " ) != MATCH_YES) |
8228 | { |
8229 | gfc_error ("Syntax error in NAME= specifier for binding label " |
8230 | "at %C" ); |
8231 | /* should give an error message here */ |
8232 | return MATCH_ERROR; |
8233 | } |
8234 | |
8235 | has_name_equals = 1; |
8236 | |
8237 | if (gfc_match_init_expr (&e) != MATCH_YES) |
8238 | { |
8239 | gfc_free_expr (e); |
8240 | return MATCH_ERROR; |
8241 | } |
8242 | |
8243 | if (!gfc_simplify_expr(e, 0)) |
8244 | { |
8245 | gfc_error ("NAME= specifier at %C should be a constant expression" ); |
8246 | gfc_free_expr (e); |
8247 | return MATCH_ERROR; |
8248 | } |
8249 | |
8250 | if (e->expr_type != EXPR_CONSTANT || e->ts.type != BT_CHARACTER |
8251 | || e->ts.kind != gfc_default_character_kind || e->rank != 0) |
8252 | { |
8253 | gfc_error ("NAME= specifier at %C should be a scalar of " |
8254 | "default character kind" ); |
8255 | gfc_free_expr(e); |
8256 | return MATCH_ERROR; |
8257 | } |
8258 | |
8259 | // Get a C string from the Fortran string constant |
8260 | binding_label = gfc_widechar_to_char (e->value.character.string, |
8261 | e->value.character.length); |
8262 | gfc_free_expr(e); |
8263 | |
8264 | // Check that it is valid (old gfc_match_name_C) |
8265 | if (check_bind_name_identifier (name: &binding_label) != MATCH_YES) |
8266 | return MATCH_ERROR; |
8267 | } |
8268 | |
8269 | /* Get the required right paren. */ |
8270 | if (gfc_match_char (')') != MATCH_YES) |
8271 | { |
8272 | gfc_error ("Missing closing paren for binding label at %C" ); |
8273 | return MATCH_ERROR; |
8274 | } |
8275 | |
8276 | if (has_name_equals && !allow_binding_name) |
8277 | { |
8278 | gfc_error ("No binding name is allowed in BIND(C) at %C" ); |
8279 | return MATCH_ERROR; |
8280 | } |
8281 | |
8282 | if (has_name_equals && sym != NULL && sym->attr.dummy) |
8283 | { |
8284 | gfc_error ("For dummy procedure %s, no binding name is " |
8285 | "allowed in BIND(C) at %C" , sym->name); |
8286 | return MATCH_ERROR; |
8287 | } |
8288 | |
8289 | |
8290 | /* Save the binding label to the symbol. If sym is null, we're |
8291 | probably matching the typespec attributes of a declaration and |
8292 | haven't gotten the name yet, and therefore, no symbol yet. */ |
8293 | if (binding_label) |
8294 | { |
8295 | if (sym != NULL) |
8296 | sym->binding_label = binding_label; |
8297 | else |
8298 | curr_binding_label = binding_label; |
8299 | } |
8300 | else if (allow_binding_name) |
8301 | { |
8302 | /* No binding label, but if symbol isn't null, we |
8303 | can set the label for it here. |
8304 | If name="" or allow_binding_name is false, no C binding name is |
8305 | created. */ |
8306 | if (sym != NULL && sym->name != NULL && has_name_equals == 0) |
8307 | sym->binding_label = IDENTIFIER_POINTER (get_identifier (sym->name)); |
8308 | } |
8309 | |
8310 | if (has_name_equals && gfc_current_state () == COMP_INTERFACE |
8311 | && current_interface.type == INTERFACE_ABSTRACT) |
8312 | { |
8313 | gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C" ); |
8314 | return MATCH_ERROR; |
8315 | } |
8316 | |
8317 | return MATCH_YES; |
8318 | } |
8319 | |
8320 | |
8321 | /* Return nonzero if we're currently compiling a contained procedure. */ |
8322 | |
8323 | static int |
8324 | contained_procedure (void) |
8325 | { |
8326 | gfc_state_data *s = gfc_state_stack; |
8327 | |
8328 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) |
8329 | && s->previous != NULL && s->previous->state == COMP_CONTAINS) |
8330 | return 1; |
8331 | |
8332 | return 0; |
8333 | } |
8334 | |
8335 | /* Set the kind of each enumerator. The kind is selected such that it is |
8336 | interoperable with the corresponding C enumeration type, making |
8337 | sure that -fshort-enums is honored. */ |
8338 | |
8339 | static void |
8340 | set_enum_kind(void) |
8341 | { |
8342 | enumerator_history *current_history = NULL; |
8343 | int kind; |
8344 | int i; |
8345 | |
8346 | if (max_enum == NULL || enum_history == NULL) |
8347 | return; |
8348 | |
8349 | if (!flag_short_enums) |
8350 | return; |
8351 | |
8352 | i = 0; |
8353 | do |
8354 | { |
8355 | kind = gfc_integer_kinds[i++].kind; |
8356 | } |
8357 | while (kind < gfc_c_int_kind |
8358 | && gfc_check_integer_range (p: max_enum->initializer->value.integer, |
8359 | kind) != ARITH_OK); |
8360 | |
8361 | current_history = enum_history; |
8362 | while (current_history != NULL) |
8363 | { |
8364 | current_history->sym->ts.kind = kind; |
8365 | current_history = current_history->next; |
8366 | } |
8367 | } |
8368 | |
8369 | |
8370 | /* Match any of the various end-block statements. Returns the type of |
8371 | END to the caller. The END INTERFACE, END IF, END DO, END SELECT |
8372 | and END BLOCK statements cannot be replaced by a single END statement. */ |
8373 | |
8374 | match |
8375 | gfc_match_end (gfc_statement *st) |
8376 | { |
8377 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
8378 | gfc_compile_state state; |
8379 | locus old_loc; |
8380 | const char *block_name; |
8381 | const char *target; |
8382 | int eos_ok; |
8383 | match m; |
8384 | gfc_namespace *parent_ns, *ns, *prev_ns; |
8385 | gfc_namespace **nsp; |
8386 | bool abbreviated_modproc_decl = false; |
8387 | bool got_matching_end = false; |
8388 | |
8389 | old_loc = gfc_current_locus; |
8390 | if (gfc_match ("end" ) != MATCH_YES) |
8391 | return MATCH_NO; |
8392 | |
8393 | state = gfc_current_state (); |
8394 | block_name = gfc_current_block () == NULL |
8395 | ? NULL : gfc_current_block ()->name; |
8396 | |
8397 | switch (state) |
8398 | { |
8399 | case COMP_ASSOCIATE: |
8400 | case COMP_BLOCK: |
8401 | if (startswith (str: block_name, prefix: "block@" )) |
8402 | block_name = NULL; |
8403 | break; |
8404 | |
8405 | case COMP_CONTAINS: |
8406 | case COMP_DERIVED_CONTAINS: |
8407 | state = gfc_state_stack->previous->state; |
8408 | block_name = gfc_state_stack->previous->sym == NULL |
8409 | ? NULL : gfc_state_stack->previous->sym->name; |
8410 | abbreviated_modproc_decl = gfc_state_stack->previous->sym |
8411 | && gfc_state_stack->previous->sym->abr_modproc_decl; |
8412 | break; |
8413 | |
8414 | default: |
8415 | break; |
8416 | } |
8417 | |
8418 | if (!abbreviated_modproc_decl) |
8419 | abbreviated_modproc_decl = gfc_current_block () |
8420 | && gfc_current_block ()->abr_modproc_decl; |
8421 | |
8422 | switch (state) |
8423 | { |
8424 | case COMP_NONE: |
8425 | case COMP_PROGRAM: |
8426 | *st = ST_END_PROGRAM; |
8427 | target = " program" ; |
8428 | eos_ok = 1; |
8429 | break; |
8430 | |
8431 | case COMP_SUBROUTINE: |
8432 | *st = ST_END_SUBROUTINE; |
8433 | if (!abbreviated_modproc_decl) |
8434 | target = " subroutine" ; |
8435 | else |
8436 | target = " procedure" ; |
8437 | eos_ok = !contained_procedure (); |
8438 | break; |
8439 | |
8440 | case COMP_FUNCTION: |
8441 | *st = ST_END_FUNCTION; |
8442 | if (!abbreviated_modproc_decl) |
8443 | target = " function" ; |
8444 | else |
8445 | target = " procedure" ; |
8446 | eos_ok = !contained_procedure (); |
8447 | break; |
8448 | |
8449 | case COMP_BLOCK_DATA: |
8450 | *st = ST_END_BLOCK_DATA; |
8451 | target = " block data" ; |
8452 | eos_ok = 1; |
8453 | break; |
8454 | |
8455 | case COMP_MODULE: |
8456 | *st = ST_END_MODULE; |
8457 | target = " module" ; |
8458 | eos_ok = 1; |
8459 | break; |
8460 | |
8461 | case COMP_SUBMODULE: |
8462 | *st = ST_END_SUBMODULE; |
8463 | target = " submodule" ; |
8464 | eos_ok = 1; |
8465 | break; |
8466 | |
8467 | case COMP_INTERFACE: |
8468 | *st = ST_END_INTERFACE; |
8469 | target = " interface" ; |
8470 | eos_ok = 0; |
8471 | break; |
8472 | |
8473 | case COMP_MAP: |
8474 | *st = ST_END_MAP; |
8475 | target = " map" ; |
8476 | eos_ok = 0; |
8477 | break; |
8478 | |
8479 | case COMP_UNION: |
8480 | *st = ST_END_UNION; |
8481 | target = " union" ; |
8482 | eos_ok = 0; |
8483 | break; |
8484 | |
8485 | case COMP_STRUCTURE: |
8486 | *st = ST_END_STRUCTURE; |
8487 | target = " structure" ; |
8488 | eos_ok = 0; |
8489 | break; |
8490 | |
8491 | case COMP_DERIVED: |
8492 | case COMP_DERIVED_CONTAINS: |
8493 | *st = ST_END_TYPE; |
8494 | target = " type" ; |
8495 | eos_ok = 0; |
8496 | break; |
8497 | |
8498 | case COMP_ASSOCIATE: |
8499 | *st = ST_END_ASSOCIATE; |
8500 | target = " associate" ; |
8501 | eos_ok = 0; |
8502 | break; |
8503 | |
8504 | case COMP_BLOCK: |
8505 | case COMP_OMP_STRICTLY_STRUCTURED_BLOCK: |
8506 | *st = ST_END_BLOCK; |
8507 | target = " block" ; |
8508 | eos_ok = 0; |
8509 | break; |
8510 | |
8511 | case COMP_IF: |
8512 | *st = ST_ENDIF; |
8513 | target = " if" ; |
8514 | eos_ok = 0; |
8515 | break; |
8516 | |
8517 | case COMP_DO: |
8518 | case COMP_DO_CONCURRENT: |
8519 | *st = ST_ENDDO; |
8520 | target = " do" ; |
8521 | eos_ok = 0; |
8522 | break; |
8523 | |
8524 | case COMP_CRITICAL: |
8525 | *st = ST_END_CRITICAL; |
8526 | target = " critical" ; |
8527 | eos_ok = 0; |
8528 | break; |
8529 | |
8530 | case COMP_SELECT: |
8531 | case COMP_SELECT_TYPE: |
8532 | case COMP_SELECT_RANK: |
8533 | *st = ST_END_SELECT; |
8534 | target = " select" ; |
8535 | eos_ok = 0; |
8536 | break; |
8537 | |
8538 | case COMP_FORALL: |
8539 | *st = ST_END_FORALL; |
8540 | target = " forall" ; |
8541 | eos_ok = 0; |
8542 | break; |
8543 | |
8544 | case COMP_WHERE: |
8545 | *st = ST_END_WHERE; |
8546 | target = " where" ; |
8547 | eos_ok = 0; |
8548 | break; |
8549 | |
8550 | case COMP_ENUM: |
8551 | *st = ST_END_ENUM; |
8552 | target = " enum" ; |
8553 | eos_ok = 0; |
8554 | last_initializer = NULL; |
8555 | set_enum_kind (); |
8556 | gfc_free_enum_history (); |
8557 | break; |
8558 | |
8559 | default: |
8560 | gfc_error ("Unexpected END statement at %C" ); |
8561 | goto cleanup; |
8562 | } |
8563 | |
8564 | old_loc = gfc_current_locus; |
8565 | if (gfc_match_eos () == MATCH_YES) |
8566 | { |
8567 | if (!eos_ok && (*st == ST_END_SUBROUTINE || *st == ST_END_FUNCTION)) |
8568 | { |
8569 | if (!gfc_notify_std (GFC_STD_F2008, "END statement " |
8570 | "instead of %s statement at %L" , |
8571 | abbreviated_modproc_decl ? "END PROCEDURE" |
8572 | : gfc_ascii_statement(*st), &old_loc)) |
8573 | goto cleanup; |
8574 | } |
8575 | else if (!eos_ok) |
8576 | { |
8577 | /* We would have required END [something]. */ |
8578 | gfc_error ("%s statement expected at %L" , |
8579 | gfc_ascii_statement (*st), &old_loc); |
8580 | goto cleanup; |
8581 | } |
8582 | |
8583 | return MATCH_YES; |
8584 | } |
8585 | |
8586 | /* Verify that we've got the sort of end-block that we're expecting. */ |
8587 | if (gfc_match (target) != MATCH_YES) |
8588 | { |
8589 | gfc_error ("Expecting %s statement at %L" , abbreviated_modproc_decl |
8590 | ? "END PROCEDURE" : gfc_ascii_statement(*st), &old_loc); |
8591 | goto cleanup; |
8592 | } |
8593 | else |
8594 | got_matching_end = true; |
8595 | |
8596 | old_loc = gfc_current_locus; |
8597 | /* If we're at the end, make sure a block name wasn't required. */ |
8598 | if (gfc_match_eos () == MATCH_YES) |
8599 | { |
8600 | |
8601 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT |
8602 | && *st != ST_END_FORALL && *st != ST_END_WHERE && *st != ST_END_BLOCK |
8603 | && *st != ST_END_ASSOCIATE && *st != ST_END_CRITICAL) |
8604 | return MATCH_YES; |
8605 | |
8606 | if (!block_name) |
8607 | return MATCH_YES; |
8608 | |
8609 | gfc_error ("Expected block name of %qs in %s statement at %L" , |
8610 | block_name, gfc_ascii_statement (*st), &old_loc); |
8611 | |
8612 | return MATCH_ERROR; |
8613 | } |
8614 | |
8615 | /* END INTERFACE has a special handler for its several possible endings. */ |
8616 | if (*st == ST_END_INTERFACE) |
8617 | return gfc_match_end_interface (); |
8618 | |
8619 | /* We haven't hit the end of statement, so what is left must be an |
8620 | end-name. */ |
8621 | m = gfc_match_space (); |
8622 | if (m == MATCH_YES) |
8623 | m = gfc_match_name (name); |
8624 | |
8625 | if (m == MATCH_NO) |
8626 | gfc_error ("Expected terminating name at %C" ); |
8627 | if (m != MATCH_YES) |
8628 | goto cleanup; |
8629 | |
8630 | if (block_name == NULL) |
8631 | goto syntax; |
8632 | |
8633 | /* We have to pick out the declared submodule name from the composite |
8634 | required by F2008:11.2.3 para 2, which ends in the declared name. */ |
8635 | if (state == COMP_SUBMODULE) |
8636 | block_name = strchr (s: block_name, c: '.') + 1; |
8637 | |
8638 | if (strcmp (s1: name, s2: block_name) != 0 && strcmp (s1: block_name, s2: "ppr@" ) != 0) |
8639 | { |
8640 | gfc_error ("Expected label %qs for %s statement at %C" , block_name, |
8641 | gfc_ascii_statement (*st)); |
8642 | goto cleanup; |
8643 | } |
8644 | /* Procedure pointer as function result. */ |
8645 | else if (strcmp (s1: block_name, s2: "ppr@" ) == 0 |
8646 | && strcmp (s1: name, gfc_current_block ()->ns->proc_name->name) != 0) |
8647 | { |
8648 | gfc_error ("Expected label %qs for %s statement at %C" , |
8649 | gfc_current_block ()->ns->proc_name->name, |
8650 | gfc_ascii_statement (*st)); |
8651 | goto cleanup; |
8652 | } |
8653 | |
8654 | if (gfc_match_eos () == MATCH_YES) |
8655 | return MATCH_YES; |
8656 | |
8657 | syntax: |
8658 | gfc_syntax_error (*st); |
8659 | |
8660 | cleanup: |
8661 | gfc_current_locus = old_loc; |
8662 | |
8663 | /* If we are missing an END BLOCK, we created a half-ready namespace. |
8664 | Remove it from the parent namespace's sibling list. */ |
8665 | |
8666 | while (state == COMP_BLOCK && !got_matching_end) |
8667 | { |
8668 | parent_ns = gfc_current_ns->parent; |
8669 | |
8670 | nsp = &(gfc_state_stack->previous->tail->ext.block.ns); |
8671 | |
8672 | prev_ns = NULL; |
8673 | ns = *nsp; |
8674 | while (ns) |
8675 | { |
8676 | if (ns == gfc_current_ns) |
8677 | { |
8678 | if (prev_ns == NULL) |
8679 | *nsp = NULL; |
8680 | else |
8681 | prev_ns->sibling = ns->sibling; |
8682 | } |
8683 | prev_ns = ns; |
8684 | ns = ns->sibling; |
8685 | } |
8686 | |
8687 | gfc_free_namespace (gfc_current_ns); |
8688 | gfc_current_ns = parent_ns; |
8689 | gfc_state_stack = gfc_state_stack->previous; |
8690 | state = gfc_current_state (); |
8691 | } |
8692 | |
8693 | return MATCH_ERROR; |
8694 | } |
8695 | |
8696 | |
8697 | |
8698 | /***************** Attribute declaration statements ****************/ |
8699 | |
8700 | /* Set the attribute of a single variable. */ |
8701 | |
8702 | static match |
8703 | attr_decl1 (void) |
8704 | { |
8705 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
8706 | gfc_array_spec *as; |
8707 | |
8708 | /* Workaround -Wmaybe-uninitialized false positive during |
8709 | profiledbootstrap by initializing them. */ |
8710 | gfc_symbol *sym = NULL; |
8711 | locus var_locus; |
8712 | match m; |
8713 | |
8714 | as = NULL; |
8715 | |
8716 | m = gfc_match_name (name); |
8717 | if (m != MATCH_YES) |
8718 | goto cleanup; |
8719 | |
8720 | if (find_special (name, result: &sym, allow_subroutine: false)) |
8721 | return MATCH_ERROR; |
8722 | |
8723 | if (!check_function_name (name)) |
8724 | { |
8725 | m = MATCH_ERROR; |
8726 | goto cleanup; |
8727 | } |
8728 | |
8729 | var_locus = gfc_current_locus; |
8730 | |
8731 | /* Deal with possible array specification for certain attributes. */ |
8732 | if (current_attr.dimension |
8733 | || current_attr.codimension |
8734 | || current_attr.allocatable |
8735 | || current_attr.pointer |
8736 | || current_attr.target) |
8737 | { |
8738 | m = gfc_match_array_spec (&as, !current_attr.codimension, |
8739 | !current_attr.dimension |
8740 | && !current_attr.pointer |
8741 | && !current_attr.target); |
8742 | if (m == MATCH_ERROR) |
8743 | goto cleanup; |
8744 | |
8745 | if (current_attr.dimension && m == MATCH_NO) |
8746 | { |
8747 | gfc_error ("Missing array specification at %L in DIMENSION " |
8748 | "statement" , &var_locus); |
8749 | m = MATCH_ERROR; |
8750 | goto cleanup; |
8751 | } |
8752 | |
8753 | if (current_attr.dimension && sym->value) |
8754 | { |
8755 | gfc_error ("Dimensions specified for %s at %L after its " |
8756 | "initialization" , sym->name, &var_locus); |
8757 | m = MATCH_ERROR; |
8758 | goto cleanup; |
8759 | } |
8760 | |
8761 | if (current_attr.codimension && m == MATCH_NO) |
8762 | { |
8763 | gfc_error ("Missing array specification at %L in CODIMENSION " |
8764 | "statement" , &var_locus); |
8765 | m = MATCH_ERROR; |
8766 | goto cleanup; |
8767 | } |
8768 | |
8769 | if ((current_attr.allocatable || current_attr.pointer) |
8770 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) |
8771 | { |
8772 | gfc_error ("Array specification must be deferred at %L" , &var_locus); |
8773 | m = MATCH_ERROR; |
8774 | goto cleanup; |
8775 | } |
8776 | } |
8777 | |
8778 | if (sym->ts.type == BT_CLASS |
8779 | && sym->ts.u.derived |
8780 | && sym->ts.u.derived->attr.is_class) |
8781 | { |
8782 | sym->attr.pointer = CLASS_DATA(sym)->attr.class_pointer; |
8783 | sym->attr.allocatable = CLASS_DATA(sym)->attr.allocatable; |
8784 | sym->attr.dimension = CLASS_DATA(sym)->attr.dimension; |
8785 | sym->attr.codimension = CLASS_DATA(sym)->attr.codimension; |
8786 | if (CLASS_DATA (sym)->as) |
8787 | sym->as = gfc_copy_array_spec (CLASS_DATA (sym)->as); |
8788 | } |
8789 | if (current_attr.dimension == 0 && current_attr.codimension == 0 |
8790 | && !gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus)) |
8791 | { |
8792 | m = MATCH_ERROR; |
8793 | goto cleanup; |
8794 | } |
8795 | if (!gfc_set_array_spec (sym, as, &var_locus)) |
8796 | { |
8797 | m = MATCH_ERROR; |
8798 | goto cleanup; |
8799 | } |
8800 | |
8801 | if (sym->attr.cray_pointee && sym->as != NULL) |
8802 | { |
8803 | /* Fix the array spec. */ |
8804 | m = gfc_mod_pointee_as (sym->as); |
8805 | if (m == MATCH_ERROR) |
8806 | goto cleanup; |
8807 | } |
8808 | |
8809 | if (!gfc_add_attribute (&sym->attr, &var_locus)) |
8810 | { |
8811 | m = MATCH_ERROR; |
8812 | goto cleanup; |
8813 | } |
8814 | |
8815 | if ((current_attr.external || current_attr.intrinsic) |
8816 | && sym->attr.flavor != FL_PROCEDURE |
8817 | && !gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL)) |
8818 | { |
8819 | m = MATCH_ERROR; |
8820 | goto cleanup; |
8821 | } |
8822 | |
8823 | if (sym->ts.type == BT_CLASS && sym->ts.u.derived->attr.is_class |
8824 | && !as && !current_attr.pointer && !current_attr.allocatable |
8825 | && !current_attr.external) |
8826 | { |
8827 | sym->attr.pointer = 0; |
8828 | sym->attr.allocatable = 0; |
8829 | sym->attr.dimension = 0; |
8830 | sym->attr.codimension = 0; |
8831 | gfc_free_array_spec (sym->as); |
8832 | sym->as = NULL; |
8833 | } |
8834 | else if (sym->ts.type == BT_CLASS |
8835 | && !gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as)) |
8836 | { |
8837 | m = MATCH_ERROR; |
8838 | goto cleanup; |
8839 | } |
8840 | |
8841 | add_hidden_procptr_result (sym); |
8842 | |
8843 | return MATCH_YES; |
8844 | |
8845 | cleanup: |
8846 | gfc_free_array_spec (as); |
8847 | return m; |
8848 | } |
8849 | |
8850 | |
8851 | /* Generic attribute declaration subroutine. Used for attributes that |
8852 | just have a list of names. */ |
8853 | |
8854 | static match |
8855 | attr_decl (void) |
8856 | { |
8857 | match m; |
8858 | |
8859 | /* Gobble the optional double colon, by simply ignoring the result |
8860 | of gfc_match(). */ |
8861 | gfc_match (" ::" ); |
8862 | |
8863 | for (;;) |
8864 | { |
8865 | m = attr_decl1 (); |
8866 | if (m != MATCH_YES) |
8867 | break; |
8868 | |
8869 | if (gfc_match_eos () == MATCH_YES) |
8870 | { |
8871 | m = MATCH_YES; |
8872 | break; |
8873 | } |
8874 | |
8875 | if (gfc_match_char (',') != MATCH_YES) |
8876 | { |
8877 | gfc_error ("Unexpected character in variable list at %C" ); |
8878 | m = MATCH_ERROR; |
8879 | break; |
8880 | } |
8881 | } |
8882 | |
8883 | return m; |
8884 | } |
8885 | |
8886 | |
8887 | /* This routine matches Cray Pointer declarations of the form: |
8888 | pointer ( <pointer>, <pointee> ) |
8889 | or |
8890 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... |
8891 | The pointer, if already declared, should be an integer. Otherwise, we |
8892 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may |
8893 | be either a scalar, or an array declaration. No space is allocated for |
8894 | the pointee. For the statement |
8895 | pointer (ipt, ar(10)) |
8896 | any subsequent uses of ar will be translated (in C-notation) as |
8897 | ar(i) => ((<type> *) ipt)(i) |
8898 | After gimplification, pointee variable will disappear in the code. */ |
8899 | |
8900 | static match |
8901 | cray_pointer_decl (void) |
8902 | { |
8903 | match m; |
8904 | gfc_array_spec *as = NULL; |
8905 | gfc_symbol *cptr; /* Pointer symbol. */ |
8906 | gfc_symbol *cpte; /* Pointee symbol. */ |
8907 | locus var_locus; |
8908 | bool done = false; |
8909 | |
8910 | while (!done) |
8911 | { |
8912 | if (gfc_match_char ('(') != MATCH_YES) |
8913 | { |
8914 | gfc_error ("Expected %<(%> at %C" ); |
8915 | return MATCH_ERROR; |
8916 | } |
8917 | |
8918 | /* Match pointer. */ |
8919 | var_locus = gfc_current_locus; |
8920 | gfc_clear_attr (¤t_attr); |
8921 | gfc_add_cray_pointer (¤t_attr, &var_locus); |
8922 | current_ts.type = BT_INTEGER; |
8923 | current_ts.kind = gfc_index_integer_kind; |
8924 | |
8925 | m = gfc_match_symbol (&cptr, 0); |
8926 | if (m != MATCH_YES) |
8927 | { |
8928 | gfc_error ("Expected variable name at %C" ); |
8929 | return m; |
8930 | } |
8931 | |
8932 | if (!gfc_add_cray_pointer (&cptr->attr, &var_locus)) |
8933 | return MATCH_ERROR; |
8934 | |
8935 | gfc_set_sym_referenced (cptr); |
8936 | |
8937 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ |
8938 | { |
8939 | cptr->ts.type = BT_INTEGER; |
8940 | cptr->ts.kind = gfc_index_integer_kind; |
8941 | } |
8942 | else if (cptr->ts.type != BT_INTEGER) |
8943 | { |
8944 | gfc_error ("Cray pointer at %C must be an integer" ); |
8945 | return MATCH_ERROR; |
8946 | } |
8947 | else if (cptr->ts.kind < gfc_index_integer_kind) |
8948 | gfc_warning (opt: 0, "Cray pointer at %C has %d bytes of precision;" |
8949 | " memory addresses require %d bytes" , |
8950 | cptr->ts.kind, gfc_index_integer_kind); |
8951 | |
8952 | if (gfc_match_char (',') != MATCH_YES) |
8953 | { |
8954 | gfc_error ("Expected \",\" at %C" ); |
8955 | return MATCH_ERROR; |
8956 | } |
8957 | |
8958 | /* Match Pointee. */ |
8959 | var_locus = gfc_current_locus; |
8960 | gfc_clear_attr (¤t_attr); |
8961 | gfc_add_cray_pointee (¤t_attr, &var_locus); |
8962 | current_ts.type = BT_UNKNOWN; |
8963 | current_ts.kind = 0; |
8964 | |
8965 | m = gfc_match_symbol (&cpte, 0); |
8966 | if (m != MATCH_YES) |
8967 | { |
8968 | gfc_error ("Expected variable name at %C" ); |
8969 | return m; |
8970 | } |
8971 | |
8972 | /* Check for an optional array spec. */ |
8973 | m = gfc_match_array_spec (&as, true, false); |
8974 | if (m == MATCH_ERROR) |
8975 | { |
8976 | gfc_free_array_spec (as); |
8977 | return m; |
8978 | } |
8979 | else if (m == MATCH_NO) |
8980 | { |
8981 | gfc_free_array_spec (as); |
8982 | as = NULL; |
8983 | } |
8984 | |
8985 | if (!gfc_add_cray_pointee (&cpte->attr, &var_locus)) |
8986 | return MATCH_ERROR; |
8987 | |
8988 | gfc_set_sym_referenced (cpte); |
8989 | |
8990 | if (cpte->as == NULL) |
8991 | { |
8992 | if (!gfc_set_array_spec (cpte, as, &var_locus)) |
8993 | gfc_internal_error ("Cannot set Cray pointee array spec." ); |
8994 | } |
8995 | else if (as != NULL) |
8996 | { |
8997 | gfc_error ("Duplicate array spec for Cray pointee at %C" ); |
8998 | gfc_free_array_spec (as); |
8999 | return MATCH_ERROR; |
9000 | } |
9001 | |
9002 | as = NULL; |
9003 | |
9004 | if (cpte->as != NULL) |
9005 | { |
9006 | /* Fix array spec. */ |
9007 | m = gfc_mod_pointee_as (cpte->as); |
9008 | if (m == MATCH_ERROR) |
9009 | return m; |
9010 | } |
9011 | |
9012 | /* Point the Pointee at the Pointer. */ |
9013 | cpte->cp_pointer = cptr; |
9014 | |
9015 | if (gfc_match_char (')') != MATCH_YES) |
9016 | { |
9017 | gfc_error ("Expected \")\" at %C" ); |
9018 | return MATCH_ERROR; |
9019 | } |
9020 | m = gfc_match_char (','); |
9021 | if (m != MATCH_YES) |
9022 | done = true; /* Stop searching for more declarations. */ |
9023 | |
9024 | } |
9025 | |
9026 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ |
9027 | || gfc_match_eos () != MATCH_YES) |
9028 | { |
9029 | gfc_error ("Expected %<,%> or end of statement at %C" ); |
9030 | return MATCH_ERROR; |
9031 | } |
9032 | return MATCH_YES; |
9033 | } |
9034 | |
9035 | |
9036 | match |
9037 | gfc_match_external (void) |
9038 | { |
9039 | |
9040 | gfc_clear_attr (¤t_attr); |
9041 | current_attr.external = 1; |
9042 | |
9043 | return attr_decl (); |
9044 | } |
9045 | |
9046 | |
9047 | match |
9048 | gfc_match_intent (void) |
9049 | { |
9050 | sym_intent intent; |
9051 | |
9052 | /* This is not allowed within a BLOCK construct! */ |
9053 | if (gfc_current_state () == COMP_BLOCK) |
9054 | { |
9055 | gfc_error ("INTENT is not allowed inside of BLOCK at %C" ); |
9056 | return MATCH_ERROR; |
9057 | } |
9058 | |
9059 | intent = match_intent_spec (); |
9060 | if (intent == INTENT_UNKNOWN) |
9061 | return MATCH_ERROR; |
9062 | |
9063 | gfc_clear_attr (¤t_attr); |
9064 | current_attr.intent = intent; |
9065 | |
9066 | return attr_decl (); |
9067 | } |
9068 | |
9069 | |
9070 | match |
9071 | gfc_match_intrinsic (void) |
9072 | { |
9073 | |
9074 | gfc_clear_attr (¤t_attr); |
9075 | current_attr.intrinsic = 1; |
9076 | |
9077 | return attr_decl (); |
9078 | } |
9079 | |
9080 | |
9081 | match |
9082 | gfc_match_optional (void) |
9083 | { |
9084 | /* This is not allowed within a BLOCK construct! */ |
9085 | if (gfc_current_state () == COMP_BLOCK) |
9086 | { |
9087 | gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C" ); |
9088 | return MATCH_ERROR; |
9089 | } |
9090 | |
9091 | gfc_clear_attr (¤t_attr); |
9092 | current_attr.optional = 1; |
9093 | |
9094 | return attr_decl (); |
9095 | } |
9096 | |
9097 | |
9098 | match |
9099 | gfc_match_pointer (void) |
9100 | { |
9101 | gfc_gobble_whitespace (); |
9102 | if (gfc_peek_ascii_char () == '(') |
9103 | { |
9104 | if (!flag_cray_pointer) |
9105 | { |
9106 | gfc_error ("Cray pointer declaration at %C requires " |
9107 | "%<-fcray-pointer%> flag" ); |
9108 | return MATCH_ERROR; |
9109 | } |
9110 | return cray_pointer_decl (); |
9111 | } |
9112 | else |
9113 | { |
9114 | gfc_clear_attr (¤t_attr); |
9115 | current_attr.pointer = 1; |
9116 | |
9117 | return attr_decl (); |
9118 | } |
9119 | } |
9120 | |
9121 | |
9122 | match |
9123 | gfc_match_allocatable (void) |
9124 | { |
9125 | gfc_clear_attr (¤t_attr); |
9126 | current_attr.allocatable = 1; |
9127 | |
9128 | return attr_decl (); |
9129 | } |
9130 | |
9131 | |
9132 | match |
9133 | gfc_match_codimension (void) |
9134 | { |
9135 | gfc_clear_attr (¤t_attr); |
9136 | current_attr.codimension = 1; |
9137 | |
9138 | return attr_decl (); |
9139 | } |
9140 | |
9141 | |
9142 | match |
9143 | gfc_match_contiguous (void) |
9144 | { |
9145 | if (!gfc_notify_std (GFC_STD_F2008, "CONTIGUOUS statement at %C" )) |
9146 | return MATCH_ERROR; |
9147 | |
9148 | gfc_clear_attr (¤t_attr); |
9149 | current_attr.contiguous = 1; |
9150 | |
9151 | return attr_decl (); |
9152 | } |
9153 | |
9154 | |
9155 | match |
9156 | gfc_match_dimension (void) |
9157 | { |
9158 | gfc_clear_attr (¤t_attr); |
9159 | current_attr.dimension = 1; |
9160 | |
9161 | return attr_decl (); |
9162 | } |
9163 | |
9164 | |
9165 | match |
9166 | gfc_match_target (void) |
9167 | { |
9168 | gfc_clear_attr (¤t_attr); |
9169 | current_attr.target = 1; |
9170 | |
9171 | return attr_decl (); |
9172 | } |
9173 | |
9174 | |
9175 | /* Match the list of entities being specified in a PUBLIC or PRIVATE |
9176 | statement. */ |
9177 | |
9178 | static match |
9179 | access_attr_decl (gfc_statement st) |
9180 | { |
9181 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
9182 | interface_type type; |
9183 | gfc_user_op *uop; |
9184 | gfc_symbol *sym, *dt_sym; |
9185 | gfc_intrinsic_op op; |
9186 | match m; |
9187 | gfc_access access = (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; |
9188 | |
9189 | if (gfc_match (" ::" ) == MATCH_NO && gfc_match_space () == MATCH_NO) |
9190 | goto done; |
9191 | |
9192 | for (;;) |
9193 | { |
9194 | m = gfc_match_generic_spec (&type, name, &op); |
9195 | if (m == MATCH_NO) |
9196 | goto syntax; |
9197 | if (m == MATCH_ERROR) |
9198 | goto done; |
9199 | |
9200 | switch (type) |
9201 | { |
9202 | case INTERFACE_NAMELESS: |
9203 | case INTERFACE_ABSTRACT: |
9204 | goto syntax; |
9205 | |
9206 | case INTERFACE_GENERIC: |
9207 | case INTERFACE_DTIO: |
9208 | |
9209 | if (gfc_get_symbol (name, NULL, &sym)) |
9210 | goto done; |
9211 | |
9212 | if (type == INTERFACE_DTIO |
9213 | && gfc_current_ns->proc_name |
9214 | && gfc_current_ns->proc_name->attr.flavor == FL_MODULE |
9215 | && sym->attr.flavor == FL_UNKNOWN) |
9216 | sym->attr.flavor = FL_PROCEDURE; |
9217 | |
9218 | if (!gfc_add_access (&sym->attr, access, sym->name, NULL)) |
9219 | goto done; |
9220 | |
9221 | if (sym->attr.generic && (dt_sym = gfc_find_dt_in_generic (sym)) |
9222 | && !gfc_add_access (&dt_sym->attr, access, sym->name, NULL)) |
9223 | goto done; |
9224 | |
9225 | break; |
9226 | |
9227 | case INTERFACE_INTRINSIC_OP: |
9228 | if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN) |
9229 | { |
9230 | gfc_intrinsic_op other_op; |
9231 | |
9232 | gfc_current_ns->operator_access[op] = access; |
9233 | |
9234 | /* Handle the case if there is another op with the same |
9235 | function, for INTRINSIC_EQ vs. INTRINSIC_EQ_OS and so on. */ |
9236 | other_op = gfc_equivalent_op (op); |
9237 | |
9238 | if (other_op != INTRINSIC_NONE) |
9239 | gfc_current_ns->operator_access[other_op] = access; |
9240 | } |
9241 | else |
9242 | { |
9243 | gfc_error ("Access specification of the %s operator at %C has " |
9244 | "already been specified" , gfc_op2string (op)); |
9245 | goto done; |
9246 | } |
9247 | |
9248 | break; |
9249 | |
9250 | case INTERFACE_USER_OP: |
9251 | uop = gfc_get_uop (name); |
9252 | |
9253 | if (uop->access == ACCESS_UNKNOWN) |
9254 | { |
9255 | uop->access = access; |
9256 | } |
9257 | else |
9258 | { |
9259 | gfc_error ("Access specification of the .%s. operator at %C " |
9260 | "has already been specified" , uop->name); |
9261 | goto done; |
9262 | } |
9263 | |
9264 | break; |
9265 | } |
9266 | |
9267 | if (gfc_match_char (',') == MATCH_NO) |
9268 | break; |
9269 | } |
9270 | |
9271 | if (gfc_match_eos () != MATCH_YES) |
9272 | goto syntax; |
9273 | return MATCH_YES; |
9274 | |
9275 | syntax: |
9276 | gfc_syntax_error (st); |
9277 | |
9278 | done: |
9279 | return MATCH_ERROR; |
9280 | } |
9281 | |
9282 | |
9283 | match |
9284 | gfc_match_protected (void) |
9285 | { |
9286 | gfc_symbol *sym; |
9287 | match m; |
9288 | char c; |
9289 | |
9290 | /* PROTECTED has already been seen, but must be followed by whitespace |
9291 | or ::. */ |
9292 | c = gfc_peek_ascii_char (); |
9293 | if (!gfc_is_whitespace (c) && c != ':') |
9294 | return MATCH_NO; |
9295 | |
9296 | if (!gfc_current_ns->proc_name |
9297 | || gfc_current_ns->proc_name->attr.flavor != FL_MODULE) |
9298 | { |
9299 | gfc_error ("PROTECTED at %C only allowed in specification " |
9300 | "part of a module" ); |
9301 | return MATCH_ERROR; |
9302 | |
9303 | } |
9304 | |
9305 | gfc_match (" ::" ); |
9306 | |
9307 | if (!gfc_notify_std (GFC_STD_F2003, "PROTECTED statement at %C" )) |
9308 | return MATCH_ERROR; |
9309 | |
9310 | /* PROTECTED has an entity-list. */ |
9311 | if (gfc_match_eos () == MATCH_YES) |
9312 | goto syntax; |
9313 | |
9314 | for(;;) |
9315 | { |
9316 | m = gfc_match_symbol (&sym, 0); |
9317 | switch (m) |
9318 | { |
9319 | case MATCH_YES: |
9320 | if (!gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus)) |
9321 | return MATCH_ERROR; |
9322 | goto next_item; |
9323 | |
9324 | case MATCH_NO: |
9325 | break; |
9326 | |
9327 | case MATCH_ERROR: |
9328 | return MATCH_ERROR; |
9329 | } |
9330 | |
9331 | next_item: |
9332 | if (gfc_match_eos () == MATCH_YES) |
9333 | break; |
9334 | if (gfc_match_char (',') != MATCH_YES) |
9335 | goto syntax; |
9336 | } |
9337 | |
9338 | return MATCH_YES; |
9339 | |
9340 | syntax: |
9341 | gfc_error ("Syntax error in PROTECTED statement at %C" ); |
9342 | return MATCH_ERROR; |
9343 | } |
9344 | |
9345 | |
9346 | /* The PRIVATE statement is a bit weird in that it can be an attribute |
9347 | declaration, but also works as a standalone statement inside of a |
9348 | type declaration or a module. */ |
9349 | |
9350 | match |
9351 | gfc_match_private (gfc_statement *st) |
9352 | { |
9353 | gfc_state_data *prev; |
9354 | |
9355 | if (gfc_match ("private" ) != MATCH_YES) |
9356 | return MATCH_NO; |
9357 | |
9358 | /* Try matching PRIVATE without an access-list. */ |
9359 | if (gfc_match_eos () == MATCH_YES) |
9360 | { |
9361 | prev = gfc_state_stack->previous; |
9362 | if (gfc_current_state () != COMP_MODULE |
9363 | && !(gfc_current_state () == COMP_DERIVED |
9364 | && prev && prev->state == COMP_MODULE) |
9365 | && !(gfc_current_state () == COMP_DERIVED_CONTAINS |
9366 | && prev->previous && prev->previous->state == COMP_MODULE)) |
9367 | { |
9368 | gfc_error ("PRIVATE statement at %C is only allowed in the " |
9369 | "specification part of a module" ); |
9370 | return MATCH_ERROR; |
9371 | } |
9372 | |
9373 | *st = ST_PRIVATE; |
9374 | return MATCH_YES; |
9375 | } |
9376 | |
9377 | /* At this point in free-form source code, PRIVATE must be followed |
9378 | by whitespace or ::. */ |
9379 | if (gfc_current_form == FORM_FREE) |
9380 | { |
9381 | char c = gfc_peek_ascii_char (); |
9382 | if (!gfc_is_whitespace (c) && c != ':') |
9383 | return MATCH_NO; |
9384 | } |
9385 | |
9386 | prev = gfc_state_stack->previous; |
9387 | if (gfc_current_state () != COMP_MODULE |
9388 | && !(gfc_current_state () == COMP_DERIVED |
9389 | && prev && prev->state == COMP_MODULE) |
9390 | && !(gfc_current_state () == COMP_DERIVED_CONTAINS |
9391 | && prev->previous && prev->previous->state == COMP_MODULE)) |
9392 | { |
9393 | gfc_error ("PRIVATE statement at %C is only allowed in the " |
9394 | "specification part of a module" ); |
9395 | return MATCH_ERROR; |
9396 | } |
9397 | |
9398 | *st = ST_ATTR_DECL; |
9399 | return access_attr_decl (st: ST_PRIVATE); |
9400 | } |
9401 | |
9402 | |
9403 | match |
9404 | gfc_match_public (gfc_statement *st) |
9405 | { |
9406 | if (gfc_match ("public" ) != MATCH_YES) |
9407 | return MATCH_NO; |
9408 | |
9409 | /* Try matching PUBLIC without an access-list. */ |
9410 | if (gfc_match_eos () == MATCH_YES) |
9411 | { |
9412 | if (gfc_current_state () != COMP_MODULE) |
9413 | { |
9414 | gfc_error ("PUBLIC statement at %C is only allowed in the " |
9415 | "specification part of a module" ); |
9416 | return MATCH_ERROR; |
9417 | } |
9418 | |
9419 | *st = ST_PUBLIC; |
9420 | return MATCH_YES; |
9421 | } |
9422 | |
9423 | /* At this point in free-form source code, PUBLIC must be followed |
9424 | by whitespace or ::. */ |
9425 | if (gfc_current_form == FORM_FREE) |
9426 | { |
9427 | char c = gfc_peek_ascii_char (); |
9428 | if (!gfc_is_whitespace (c) && c != ':') |
9429 | return MATCH_NO; |
9430 | } |
9431 | |
9432 | if (gfc_current_state () != COMP_MODULE) |
9433 | { |
9434 | gfc_error ("PUBLIC statement at %C is only allowed in the " |
9435 | "specification part of a module" ); |
9436 | return MATCH_ERROR; |
9437 | } |
9438 | |
9439 | *st = ST_ATTR_DECL; |
9440 | return access_attr_decl (st: ST_PUBLIC); |
9441 | } |
9442 | |
9443 | |
9444 | /* Workhorse for gfc_match_parameter. */ |
9445 | |
9446 | static match |
9447 | do_parm (void) |
9448 | { |
9449 | gfc_symbol *sym; |
9450 | gfc_expr *init; |
9451 | match m; |
9452 | bool t; |
9453 | |
9454 | m = gfc_match_symbol (&sym, 0); |
9455 | if (m == MATCH_NO) |
9456 | gfc_error ("Expected variable name at %C in PARAMETER statement" ); |
9457 | |
9458 | if (m != MATCH_YES) |
9459 | return m; |
9460 | |
9461 | if (gfc_match_char ('=') == MATCH_NO) |
9462 | { |
9463 | gfc_error ("Expected = sign in PARAMETER statement at %C" ); |
9464 | return MATCH_ERROR; |
9465 | } |
9466 | |
9467 | m = gfc_match_init_expr (&init); |
9468 | if (m == MATCH_NO) |
9469 | gfc_error ("Expected expression at %C in PARAMETER statement" ); |
9470 | if (m != MATCH_YES) |
9471 | return m; |
9472 | |
9473 | if (sym->ts.type == BT_UNKNOWN |
9474 | && !gfc_set_default_type (sym, 1, NULL)) |
9475 | { |
9476 | m = MATCH_ERROR; |
9477 | goto cleanup; |
9478 | } |
9479 | |
9480 | if (!gfc_check_assign_symbol (sym, NULL, init) |
9481 | || !gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL)) |
9482 | { |
9483 | m = MATCH_ERROR; |
9484 | goto cleanup; |
9485 | } |
9486 | |
9487 | if (sym->value) |
9488 | { |
9489 | gfc_error ("Initializing already initialized variable at %C" ); |
9490 | m = MATCH_ERROR; |
9491 | goto cleanup; |
9492 | } |
9493 | |
9494 | t = add_init_expr_to_sym (name: sym->name, initp: &init, var_locus: &gfc_current_locus); |
9495 | return (t) ? MATCH_YES : MATCH_ERROR; |
9496 | |
9497 | cleanup: |
9498 | gfc_free_expr (init); |
9499 | return m; |
9500 | } |
9501 | |
9502 | |
9503 | /* Match a parameter statement, with the weird syntax that these have. */ |
9504 | |
9505 | match |
9506 | gfc_match_parameter (void) |
9507 | { |
9508 | const char *term = " )%t" ; |
9509 | match m; |
9510 | |
9511 | if (gfc_match_char ('(') == MATCH_NO) |
9512 | { |
9513 | /* With legacy PARAMETER statements, don't expect a terminating ')'. */ |
9514 | if (!gfc_notify_std (GFC_STD_LEGACY, "PARAMETER without '()' at %C" )) |
9515 | return MATCH_NO; |
9516 | term = " %t" ; |
9517 | } |
9518 | |
9519 | for (;;) |
9520 | { |
9521 | m = do_parm (); |
9522 | if (m != MATCH_YES) |
9523 | break; |
9524 | |
9525 | if (gfc_match (term) == MATCH_YES) |
9526 | break; |
9527 | |
9528 | if (gfc_match_char (',') != MATCH_YES) |
9529 | { |
9530 | gfc_error ("Unexpected characters in PARAMETER statement at %C" ); |
9531 | m = MATCH_ERROR; |
9532 | break; |
9533 | } |
9534 | } |
9535 | |
9536 | return m; |
9537 | } |
9538 | |
9539 | |
9540 | match |
9541 | gfc_match_automatic (void) |
9542 | { |
9543 | gfc_symbol *sym; |
9544 | match m; |
9545 | bool seen_symbol = false; |
9546 | |
9547 | if (!flag_dec_static) |
9548 | { |
9549 | gfc_error ("%s at %C is a DEC extension, enable with " |
9550 | "%<-fdec-static%>" , |
9551 | "AUTOMATIC" |
9552 | ); |
9553 | return MATCH_ERROR; |
9554 | } |
9555 | |
9556 | gfc_match (" ::" ); |
9557 | |
9558 | for (;;) |
9559 | { |
9560 | m = gfc_match_symbol (&sym, 0); |
9561 | switch (m) |
9562 | { |
9563 | case MATCH_NO: |
9564 | break; |
9565 | |
9566 | case MATCH_ERROR: |
9567 | return MATCH_ERROR; |
9568 | |
9569 | case MATCH_YES: |
9570 | if (!gfc_add_automatic (&sym->attr, sym->name, &gfc_current_locus)) |
9571 | return MATCH_ERROR; |
9572 | seen_symbol = true; |
9573 | break; |
9574 | } |
9575 | |
9576 | if (gfc_match_eos () == MATCH_YES) |
9577 | break; |
9578 | if (gfc_match_char (',') != MATCH_YES) |
9579 | goto syntax; |
9580 | } |
9581 | |
9582 | if (!seen_symbol) |
9583 | { |
9584 | gfc_error ("Expected entity-list in AUTOMATIC statement at %C" ); |
9585 | return MATCH_ERROR; |
9586 | } |
9587 | |
9588 | return MATCH_YES; |
9589 | |
9590 | syntax: |
9591 | gfc_error ("Syntax error in AUTOMATIC statement at %C" ); |
9592 | return MATCH_ERROR; |
9593 | } |
9594 | |
9595 | |
9596 | match |
9597 | gfc_match_static (void) |
9598 | { |
9599 | gfc_symbol *sym; |
9600 | match m; |
9601 | bool seen_symbol = false; |
9602 | |
9603 | if (!flag_dec_static) |
9604 | { |
9605 | gfc_error ("%s at %C is a DEC extension, enable with " |
9606 | "%<-fdec-static%>" , |
9607 | "STATIC" ); |
9608 | return MATCH_ERROR; |
9609 | } |
9610 | |
9611 | gfc_match (" ::" ); |
9612 | |
9613 | for (;;) |
9614 | { |
9615 | m = gfc_match_symbol (&sym, 0); |
9616 | switch (m) |
9617 | { |
9618 | case MATCH_NO: |
9619 | break; |
9620 | |
9621 | case MATCH_ERROR: |
9622 | return MATCH_ERROR; |
9623 | |
9624 | case MATCH_YES: |
9625 | if (!gfc_add_save (&sym->attr, SAVE_EXPLICIT, sym->name, |
9626 | &gfc_current_locus)) |
9627 | return MATCH_ERROR; |
9628 | seen_symbol = true; |
9629 | break; |
9630 | } |
9631 | |
9632 | if (gfc_match_eos () == MATCH_YES) |
9633 | break; |
9634 | if (gfc_match_char (',') != MATCH_YES) |
9635 | goto syntax; |
9636 | } |
9637 | |
9638 | if (!seen_symbol) |
9639 | { |
9640 | gfc_error ("Expected entity-list in STATIC statement at %C" ); |
9641 | return MATCH_ERROR; |
9642 | } |
9643 | |
9644 | return MATCH_YES; |
9645 | |
9646 | syntax: |
9647 | gfc_error ("Syntax error in STATIC statement at %C" ); |
9648 | return MATCH_ERROR; |
9649 | } |
9650 | |
9651 | |
9652 | /* Save statements have a special syntax. */ |
9653 | |
9654 | match |
9655 | gfc_match_save (void) |
9656 | { |
9657 | char n[GFC_MAX_SYMBOL_LEN+1]; |
9658 | gfc_common_head *c; |
9659 | gfc_symbol *sym; |
9660 | match m; |
9661 | |
9662 | if (gfc_match_eos () == MATCH_YES) |
9663 | { |
9664 | if (gfc_current_ns->seen_save) |
9665 | { |
9666 | if (!gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C " |
9667 | "follows previous SAVE statement" )) |
9668 | return MATCH_ERROR; |
9669 | } |
9670 | |
9671 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; |
9672 | return MATCH_YES; |
9673 | } |
9674 | |
9675 | if (gfc_current_ns->save_all) |
9676 | { |
9677 | if (!gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows " |
9678 | "blanket SAVE statement" )) |
9679 | return MATCH_ERROR; |
9680 | } |
9681 | |
9682 | gfc_match (" ::" ); |
9683 | |
9684 | for (;;) |
9685 | { |
9686 | m = gfc_match_symbol (&sym, 0); |
9687 | switch (m) |
9688 | { |
9689 | case MATCH_YES: |
9690 | if (!gfc_add_save (&sym->attr, SAVE_EXPLICIT, sym->name, |
9691 | &gfc_current_locus)) |
9692 | return MATCH_ERROR; |
9693 | goto next_item; |
9694 | |
9695 | case MATCH_NO: |
9696 | break; |
9697 | |
9698 | case MATCH_ERROR: |
9699 | return MATCH_ERROR; |
9700 | } |
9701 | |
9702 | m = gfc_match (" / %n /" , &n); |
9703 | if (m == MATCH_ERROR) |
9704 | return MATCH_ERROR; |
9705 | if (m == MATCH_NO) |
9706 | goto syntax; |
9707 | |
9708 | c = gfc_get_common (n, 0); |
9709 | c->saved = 1; |
9710 | |
9711 | gfc_current_ns->seen_save = 1; |
9712 | |
9713 | next_item: |
9714 | if (gfc_match_eos () == MATCH_YES) |
9715 | break; |
9716 | if (gfc_match_char (',') != MATCH_YES) |
9717 | goto syntax; |
9718 | } |
9719 | |
9720 | return MATCH_YES; |
9721 | |
9722 | syntax: |
9723 | if (gfc_current_ns->seen_save) |
9724 | { |
9725 | gfc_error ("Syntax error in SAVE statement at %C" ); |
9726 | return MATCH_ERROR; |
9727 | } |
9728 | else |
9729 | return MATCH_NO; |
9730 | } |
9731 | |
9732 | |
9733 | match |
9734 | gfc_match_value (void) |
9735 | { |
9736 | gfc_symbol *sym; |
9737 | match m; |
9738 | |
9739 | /* This is not allowed within a BLOCK construct! */ |
9740 | if (gfc_current_state () == COMP_BLOCK) |
9741 | { |
9742 | gfc_error ("VALUE is not allowed inside of BLOCK at %C" ); |
9743 | return MATCH_ERROR; |
9744 | } |
9745 | |
9746 | if (!gfc_notify_std (GFC_STD_F2003, "VALUE statement at %C" )) |
9747 | return MATCH_ERROR; |
9748 | |
9749 | if (gfc_match (" ::" ) == MATCH_NO && gfc_match_space () == MATCH_NO) |
9750 | { |
9751 | return MATCH_ERROR; |
9752 | } |
9753 | |
9754 | if (gfc_match_eos () == MATCH_YES) |
9755 | goto syntax; |
9756 | |
9757 | for(;;) |
9758 | { |
9759 | m = gfc_match_symbol (&sym, 0); |
9760 | switch (m) |
9761 | { |
9762 | case MATCH_YES: |
9763 | if (!gfc_add_value (&sym->attr, sym->name, &gfc_current_locus)) |
9764 | return MATCH_ERROR; |
9765 | goto next_item; |
9766 | |
9767 | case MATCH_NO: |
9768 | break; |
9769 | |
9770 | case MATCH_ERROR: |
9771 | return MATCH_ERROR; |
9772 | } |
9773 | |
9774 | next_item: |
9775 | if (gfc_match_eos () == MATCH_YES) |
9776 | break; |
9777 | if (gfc_match_char (',') != MATCH_YES) |
9778 | goto syntax; |
9779 | } |
9780 | |
9781 | return MATCH_YES; |
9782 | |
9783 | syntax: |
9784 | gfc_error ("Syntax error in VALUE statement at %C" ); |
9785 | return MATCH_ERROR; |
9786 | } |
9787 | |
9788 | |
9789 | match |
9790 | gfc_match_volatile (void) |
9791 | { |
9792 | gfc_symbol *sym; |
9793 | char *name; |
9794 | match m; |
9795 | |
9796 | if (!gfc_notify_std (GFC_STD_F2003, "VOLATILE statement at %C" )) |
9797 | return MATCH_ERROR; |
9798 | |
9799 | if (gfc_match (" ::" ) == MATCH_NO && gfc_match_space () == MATCH_NO) |
9800 | { |
9801 | return MATCH_ERROR; |
9802 | } |
9803 | |
9804 | if (gfc_match_eos () == MATCH_YES) |
9805 | goto syntax; |
9806 | |
9807 | for(;;) |
9808 | { |
9809 | /* VOLATILE is special because it can be added to host-associated |
9810 | symbols locally. Except for coarrays. */ |
9811 | m = gfc_match_symbol (&sym, 1); |
9812 | switch (m) |
9813 | { |
9814 | case MATCH_YES: |
9815 | name = XCNEWVAR (char, strlen (sym->name) + 1); |
9816 | strcpy (dest: name, src: sym->name); |
9817 | if (!check_function_name (name)) |
9818 | return MATCH_ERROR; |
9819 | /* F2008, C560+C561. VOLATILE for host-/use-associated variable or |
9820 | for variable in a BLOCK which is defined outside of the BLOCK. */ |
9821 | if (sym->ns != gfc_current_ns && sym->attr.codimension) |
9822 | { |
9823 | gfc_error ("Specifying VOLATILE for coarray variable %qs at " |
9824 | "%C, which is use-/host-associated" , sym->name); |
9825 | return MATCH_ERROR; |
9826 | } |
9827 | if (!gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus)) |
9828 | return MATCH_ERROR; |
9829 | goto next_item; |
9830 | |
9831 | case MATCH_NO: |
9832 | break; |
9833 | |
9834 | case MATCH_ERROR: |
9835 | return MATCH_ERROR; |
9836 | } |
9837 | |
9838 | next_item: |
9839 | if (gfc_match_eos () == MATCH_YES) |
9840 | break; |
9841 | if (gfc_match_char (',') != MATCH_YES) |
9842 | goto syntax; |
9843 | } |
9844 | |
9845 | return MATCH_YES; |
9846 | |
9847 | syntax: |
9848 | gfc_error ("Syntax error in VOLATILE statement at %C" ); |
9849 | return MATCH_ERROR; |
9850 | } |
9851 | |
9852 | |
9853 | match |
9854 | gfc_match_asynchronous (void) |
9855 | { |
9856 | gfc_symbol *sym; |
9857 | char *name; |
9858 | match m; |
9859 | |
9860 | if (!gfc_notify_std (GFC_STD_F2003, "ASYNCHRONOUS statement at %C" )) |
9861 | return MATCH_ERROR; |
9862 | |
9863 | if (gfc_match (" ::" ) == MATCH_NO && gfc_match_space () == MATCH_NO) |
9864 | { |
9865 | return MATCH_ERROR; |
9866 | } |
9867 | |
9868 | if (gfc_match_eos () == MATCH_YES) |
9869 | goto syntax; |
9870 | |
9871 | for(;;) |
9872 | { |
9873 | /* ASYNCHRONOUS is special because it can be added to host-associated |
9874 | symbols locally. */ |
9875 | m = gfc_match_symbol (&sym, 1); |
9876 | switch (m) |
9877 | { |
9878 | case MATCH_YES: |
9879 | name = XCNEWVAR (char, strlen (sym->name) + 1); |
9880 | strcpy (dest: name, src: sym->name); |
9881 | if (!check_function_name (name)) |
9882 | return MATCH_ERROR; |
9883 | if (!gfc_add_asynchronous (&sym->attr, sym->name, &gfc_current_locus)) |
9884 | return MATCH_ERROR; |
9885 | goto next_item; |
9886 | |
9887 | case MATCH_NO: |
9888 | break; |
9889 | |
9890 | case MATCH_ERROR: |
9891 | return MATCH_ERROR; |
9892 | } |
9893 | |
9894 | next_item: |
9895 | if (gfc_match_eos () == MATCH_YES) |
9896 | break; |
9897 | if (gfc_match_char (',') != MATCH_YES) |
9898 | goto syntax; |
9899 | } |
9900 | |
9901 | return MATCH_YES; |
9902 | |
9903 | syntax: |
9904 | gfc_error ("Syntax error in ASYNCHRONOUS statement at %C" ); |
9905 | return MATCH_ERROR; |
9906 | } |
9907 | |
9908 | |
9909 | /* Match a module procedure statement in a submodule. */ |
9910 | |
9911 | match |
9912 | gfc_match_submod_proc (void) |
9913 | { |
9914 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
9915 | gfc_symbol *sym, *fsym; |
9916 | match m; |
9917 | gfc_formal_arglist *formal, *head, *tail; |
9918 | |
9919 | if (gfc_current_state () != COMP_CONTAINS |
9920 | || !(gfc_state_stack->previous |
9921 | && (gfc_state_stack->previous->state == COMP_SUBMODULE |
9922 | || gfc_state_stack->previous->state == COMP_MODULE))) |
9923 | return MATCH_NO; |
9924 | |
9925 | m = gfc_match (" module% procedure% %n" , name); |
9926 | if (m != MATCH_YES) |
9927 | return m; |
9928 | |
9929 | if (!gfc_notify_std (GFC_STD_F2008, "MODULE PROCEDURE declaration " |
9930 | "at %C" )) |
9931 | return MATCH_ERROR; |
9932 | |
9933 | if (get_proc_name (name, result: &sym, module_fcn_entry: false)) |
9934 | return MATCH_ERROR; |
9935 | |
9936 | /* Make sure that the result field is appropriately filled. */ |
9937 | if (sym->tlink && sym->tlink->attr.function) |
9938 | { |
9939 | if (sym->tlink->result && sym->tlink->result != sym->tlink) |
9940 | { |
9941 | sym->result = sym->tlink->result; |
9942 | if (!sym->result->attr.use_assoc) |
9943 | { |
9944 | gfc_symtree *st = gfc_new_symtree (&gfc_current_ns->sym_root, |
9945 | sym->result->name); |
9946 | st->n.sym = sym->result; |
9947 | sym->result->refs++; |
9948 | } |
9949 | } |
9950 | else |
9951 | sym->result = sym; |
9952 | } |
9953 | |
9954 | /* Set declared_at as it might point to, e.g., a PUBLIC statement, if |
9955 | the symbol existed before. */ |
9956 | sym->declared_at = gfc_current_locus; |
9957 | |
9958 | if (!sym->attr.module_procedure) |
9959 | return MATCH_ERROR; |
9960 | |
9961 | /* Signal match_end to expect "end procedure". */ |
9962 | sym->abr_modproc_decl = 1; |
9963 | |
9964 | /* Change from IFSRC_IFBODY coming from the interface declaration. */ |
9965 | sym->attr.if_source = IFSRC_DECL; |
9966 | |
9967 | gfc_new_block = sym; |
9968 | |
9969 | /* Make a new formal arglist with the symbols in the procedure |
9970 | namespace. */ |
9971 | head = tail = NULL; |
9972 | for (formal = sym->formal; formal && formal->sym; formal = formal->next) |
9973 | { |
9974 | if (formal == sym->formal) |
9975 | head = tail = gfc_get_formal_arglist (); |
9976 | else |
9977 | { |
9978 | tail->next = gfc_get_formal_arglist (); |
9979 | tail = tail->next; |
9980 | } |
9981 | |
9982 | if (gfc_copy_dummy_sym (&fsym, formal->sym, 0)) |
9983 | goto cleanup; |
9984 | |
9985 | tail->sym = fsym; |
9986 | gfc_set_sym_referenced (fsym); |
9987 | } |
9988 | |
9989 | /* The dummy symbols get cleaned up, when the formal_namespace of the |
9990 | interface declaration is cleared. This allows us to add the |
9991 | explicit interface as is done for other type of procedure. */ |
9992 | if (!gfc_add_explicit_interface (sym, IFSRC_DECL, head, |
9993 | &gfc_current_locus)) |
9994 | return MATCH_ERROR; |
9995 | |
9996 | if (gfc_match_eos () != MATCH_YES) |
9997 | { |
9998 | /* Unset st->n.sym. Note: in reject_statement (), the symbol changes are |
9999 | undone, such that the st->n.sym->formal points to the original symbol; |
10000 | if now this namespace is finalized, the formal namespace is freed, |
10001 | but it might be still needed in the parent namespace. */ |
10002 | gfc_symtree *st = gfc_find_symtree (gfc_current_ns->sym_root, sym->name); |
10003 | st->n.sym = NULL; |
10004 | gfc_free_symbol (sym->tlink); |
10005 | sym->tlink = NULL; |
10006 | sym->refs--; |
10007 | gfc_syntax_error (ST_MODULE_PROC); |
10008 | return MATCH_ERROR; |
10009 | } |
10010 | |
10011 | return MATCH_YES; |
10012 | |
10013 | cleanup: |
10014 | gfc_free_formal_arglist (head); |
10015 | return MATCH_ERROR; |
10016 | } |
10017 | |
10018 | |
10019 | /* Match a module procedure statement. Note that we have to modify |
10020 | symbols in the parent's namespace because the current one was there |
10021 | to receive symbols that are in an interface's formal argument list. */ |
10022 | |
10023 | match |
10024 | gfc_match_modproc (void) |
10025 | { |
10026 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
10027 | gfc_symbol *sym; |
10028 | match m; |
10029 | locus old_locus; |
10030 | gfc_namespace *module_ns; |
10031 | gfc_interface *old_interface_head, *interface; |
10032 | |
10033 | if (gfc_state_stack->previous == NULL |
10034 | || (gfc_state_stack->state != COMP_INTERFACE |
10035 | && (gfc_state_stack->state != COMP_CONTAINS |
10036 | || gfc_state_stack->previous->state != COMP_INTERFACE)) |
10037 | || current_interface.type == INTERFACE_NAMELESS |
10038 | || current_interface.type == INTERFACE_ABSTRACT) |
10039 | { |
10040 | gfc_error ("MODULE PROCEDURE at %C must be in a generic module " |
10041 | "interface" ); |
10042 | return MATCH_ERROR; |
10043 | } |
10044 | |
10045 | module_ns = gfc_current_ns->parent; |
10046 | for (; module_ns; module_ns = module_ns->parent) |
10047 | if (module_ns->proc_name->attr.flavor == FL_MODULE |
10048 | || module_ns->proc_name->attr.flavor == FL_PROGRAM |
10049 | || (module_ns->proc_name->attr.flavor == FL_PROCEDURE |
10050 | && !module_ns->proc_name->attr.contained)) |
10051 | break; |
10052 | |
10053 | if (module_ns == NULL) |
10054 | return MATCH_ERROR; |
10055 | |
10056 | /* Store the current state of the interface. We will need it if we |
10057 | end up with a syntax error and need to recover. */ |
10058 | old_interface_head = gfc_current_interface_head (); |
10059 | |
10060 | /* Check if the F2008 optional double colon appears. */ |
10061 | gfc_gobble_whitespace (); |
10062 | old_locus = gfc_current_locus; |
10063 | if (gfc_match ("::" ) == MATCH_YES) |
10064 | { |
10065 | if (!gfc_notify_std (GFC_STD_F2008, "double colon in " |
10066 | "MODULE PROCEDURE statement at %L" , &old_locus)) |
10067 | return MATCH_ERROR; |
10068 | } |
10069 | else |
10070 | gfc_current_locus = old_locus; |
10071 | |
10072 | for (;;) |
10073 | { |
10074 | bool last = false; |
10075 | old_locus = gfc_current_locus; |
10076 | |
10077 | m = gfc_match_name (name); |
10078 | if (m == MATCH_NO) |
10079 | goto syntax; |
10080 | if (m != MATCH_YES) |
10081 | return MATCH_ERROR; |
10082 | |
10083 | /* Check for syntax error before starting to add symbols to the |
10084 | current namespace. */ |
10085 | if (gfc_match_eos () == MATCH_YES) |
10086 | last = true; |
10087 | |
10088 | if (!last && gfc_match_char (',') != MATCH_YES) |
10089 | goto syntax; |
10090 | |
10091 | /* Now we're sure the syntax is valid, we process this item |
10092 | further. */ |
10093 | if (gfc_get_symbol (name, module_ns, &sym)) |
10094 | return MATCH_ERROR; |
10095 | |
10096 | if (sym->attr.intrinsic) |
10097 | { |
10098 | gfc_error ("Intrinsic procedure at %L cannot be a MODULE " |
10099 | "PROCEDURE" , &old_locus); |
10100 | return MATCH_ERROR; |
10101 | } |
10102 | |
10103 | if (sym->attr.proc != PROC_MODULE |
10104 | && !gfc_add_procedure (&sym->attr, PROC_MODULE, sym->name, NULL)) |
10105 | return MATCH_ERROR; |
10106 | |
10107 | if (!gfc_add_interface (sym)) |
10108 | return MATCH_ERROR; |
10109 | |
10110 | sym->attr.mod_proc = 1; |
10111 | sym->declared_at = old_locus; |
10112 | |
10113 | if (last) |
10114 | break; |
10115 | } |
10116 | |
10117 | return MATCH_YES; |
10118 | |
10119 | syntax: |
10120 | /* Restore the previous state of the interface. */ |
10121 | interface = gfc_current_interface_head (); |
10122 | gfc_set_current_interface_head (old_interface_head); |
10123 | |
10124 | /* Free the new interfaces. */ |
10125 | while (interface != old_interface_head) |
10126 | { |
10127 | gfc_interface *i = interface->next; |
10128 | free (ptr: interface); |
10129 | interface = i; |
10130 | } |
10131 | |
10132 | /* And issue a syntax error. */ |
10133 | gfc_syntax_error (ST_MODULE_PROC); |
10134 | return MATCH_ERROR; |
10135 | } |
10136 | |
10137 | |
10138 | /* Check a derived type that is being extended. */ |
10139 | |
10140 | static gfc_symbol* |
10141 | check_extended_derived_type (char *name) |
10142 | { |
10143 | gfc_symbol *extended; |
10144 | |
10145 | if (gfc_find_symbol (name, gfc_current_ns, 1, &extended)) |
10146 | { |
10147 | gfc_error ("Ambiguous symbol in TYPE definition at %C" ); |
10148 | return NULL; |
10149 | } |
10150 | |
10151 | extended = gfc_find_dt_in_generic (extended); |
10152 | |
10153 | /* F08:C428. */ |
10154 | if (!extended) |
10155 | { |
10156 | gfc_error ("Symbol %qs at %C has not been previously defined" , name); |
10157 | return NULL; |
10158 | } |
10159 | |
10160 | if (extended->attr.flavor != FL_DERIVED) |
10161 | { |
10162 | gfc_error ("%qs in EXTENDS expression at %C is not a " |
10163 | "derived type" , name); |
10164 | return NULL; |
10165 | } |
10166 | |
10167 | if (extended->attr.is_bind_c) |
10168 | { |
10169 | gfc_error ("%qs cannot be extended at %C because it " |
10170 | "is BIND(C)" , extended->name); |
10171 | return NULL; |
10172 | } |
10173 | |
10174 | if (extended->attr.sequence) |
10175 | { |
10176 | gfc_error ("%qs cannot be extended at %C because it " |
10177 | "is a SEQUENCE type" , extended->name); |
10178 | return NULL; |
10179 | } |
10180 | |
10181 | return extended; |
10182 | } |
10183 | |
10184 | |
10185 | /* Match the optional attribute specifiers for a type declaration. |
10186 | Return MATCH_ERROR if an error is encountered in one of the handled |
10187 | attributes (public, private, bind(c)), MATCH_NO if what's found is |
10188 | not a handled attribute, and MATCH_YES otherwise. TODO: More error |
10189 | checking on attribute conflicts needs to be done. */ |
10190 | |
10191 | static match |
10192 | gfc_get_type_attr_spec (symbol_attribute *attr, char *name) |
10193 | { |
10194 | /* See if the derived type is marked as private. */ |
10195 | if (gfc_match (" , private" ) == MATCH_YES) |
10196 | { |
10197 | if (gfc_current_state () != COMP_MODULE) |
10198 | { |
10199 | gfc_error ("Derived type at %C can only be PRIVATE in the " |
10200 | "specification part of a module" ); |
10201 | return MATCH_ERROR; |
10202 | } |
10203 | |
10204 | if (!gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL)) |
10205 | return MATCH_ERROR; |
10206 | } |
10207 | else if (gfc_match (" , public" ) == MATCH_YES) |
10208 | { |
10209 | if (gfc_current_state () != COMP_MODULE) |
10210 | { |
10211 | gfc_error ("Derived type at %C can only be PUBLIC in the " |
10212 | "specification part of a module" ); |
10213 | return MATCH_ERROR; |
10214 | } |
10215 | |
10216 | if (!gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL)) |
10217 | return MATCH_ERROR; |
10218 | } |
10219 | else if (gfc_match (" , bind ( c )" ) == MATCH_YES) |
10220 | { |
10221 | /* If the type is defined to be bind(c) it then needs to make |
10222 | sure that all fields are interoperable. This will |
10223 | need to be a semantic check on the finished derived type. |
10224 | See 15.2.3 (lines 9-12) of F2003 draft. */ |
10225 | if (!gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0)) |
10226 | return MATCH_ERROR; |
10227 | |
10228 | /* TODO: attr conflicts need to be checked, probably in symbol.cc. */ |
10229 | } |
10230 | else if (gfc_match (" , abstract" ) == MATCH_YES) |
10231 | { |
10232 | if (!gfc_notify_std (GFC_STD_F2003, "ABSTRACT type at %C" )) |
10233 | return MATCH_ERROR; |
10234 | |
10235 | if (!gfc_add_abstract (attr, where: &gfc_current_locus)) |
10236 | return MATCH_ERROR; |
10237 | } |
10238 | else if (name && gfc_match (" , extends ( %n )" , name) == MATCH_YES) |
10239 | { |
10240 | if (!gfc_add_extension (attr, &gfc_current_locus)) |
10241 | return MATCH_ERROR; |
10242 | } |
10243 | else |
10244 | return MATCH_NO; |
10245 | |
10246 | /* If we get here, something matched. */ |
10247 | return MATCH_YES; |
10248 | } |
10249 | |
10250 | |
10251 | /* Common function for type declaration blocks similar to derived types, such |
10252 | as STRUCTURES and MAPs. Unlike derived types, a structure type |
10253 | does NOT have a generic symbol matching the name given by the user. |
10254 | STRUCTUREs can share names with variables and PARAMETERs so we must allow |
10255 | for the creation of an independent symbol. |
10256 | Other parameters are a message to prefix errors with, the name of the new |
10257 | type to be created, and the flavor to add to the resulting symbol. */ |
10258 | |
10259 | static bool |
10260 | get_struct_decl (const char *name, sym_flavor fl, locus *decl, |
10261 | gfc_symbol **result) |
10262 | { |
10263 | gfc_symbol *sym; |
10264 | locus where; |
10265 | |
10266 | gcc_assert (name[0] == (char) TOUPPER (name[0])); |
10267 | |
10268 | if (decl) |
10269 | where = *decl; |
10270 | else |
10271 | where = gfc_current_locus; |
10272 | |
10273 | if (gfc_get_symbol (name, NULL, &sym)) |
10274 | return false; |
10275 | |
10276 | if (!sym) |
10277 | { |
10278 | gfc_internal_error ("Failed to create structure type '%s' at %C" , name); |
10279 | return false; |
10280 | } |
10281 | |
10282 | if (sym->components != NULL || sym->attr.zero_comp) |
10283 | { |
10284 | gfc_error ("Type definition of %qs at %C was already defined at %L" , |
10285 | sym->name, &sym->declared_at); |
10286 | return false; |
10287 | } |
10288 | |
10289 | sym->declared_at = where; |
10290 | |
10291 | if (sym->attr.flavor != fl |
10292 | && !gfc_add_flavor (&sym->attr, fl, sym->name, NULL)) |
10293 | return false; |
10294 | |
10295 | if (!sym->hash_value) |
10296 | /* Set the hash for the compound name for this type. */ |
10297 | sym->hash_value = gfc_hash_value (sym); |
10298 | |
10299 | /* Normally the type is expected to have been completely parsed by the time |
10300 | a field declaration with this type is seen. For unions, maps, and nested |
10301 | structure declarations, we need to indicate that it is okay that we |
10302 | haven't seen any components yet. This will be updated after the structure |
10303 | is fully parsed. */ |
10304 | sym->attr.zero_comp = 0; |
10305 | |
10306 | /* Structures always act like derived-types with the SEQUENCE attribute */ |
10307 | gfc_add_sequence (&sym->attr, sym->name, NULL); |
10308 | |
10309 | if (result) *result = sym; |
10310 | |
10311 | return true; |
10312 | } |
10313 | |
10314 | |
10315 | /* Match the opening of a MAP block. Like a struct within a union in C; |
10316 | behaves identical to STRUCTURE blocks. */ |
10317 | |
10318 | match |
10319 | gfc_match_map (void) |
10320 | { |
10321 | /* Counter used to give unique internal names to map structures. */ |
10322 | static unsigned int gfc_map_id = 0; |
10323 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
10324 | gfc_symbol *sym; |
10325 | locus old_loc; |
10326 | |
10327 | old_loc = gfc_current_locus; |
10328 | |
10329 | if (gfc_match_eos () != MATCH_YES) |
10330 | { |
10331 | gfc_error ("Junk after MAP statement at %C" ); |
10332 | gfc_current_locus = old_loc; |
10333 | return MATCH_ERROR; |
10334 | } |
10335 | |
10336 | /* Map blocks are anonymous so we make up unique names for the symbol table |
10337 | which are invalid Fortran identifiers. */ |
10338 | snprintf (s: name, GFC_MAX_SYMBOL_LEN + 1, format: "MM$%u" , gfc_map_id++); |
10339 | |
10340 | if (!get_struct_decl (name, fl: FL_STRUCT, decl: &old_loc, result: &sym)) |
10341 | return MATCH_ERROR; |
10342 | |
10343 | gfc_new_block = sym; |
10344 | |
10345 | return MATCH_YES; |
10346 | } |
10347 | |
10348 | |
10349 | /* Match the opening of a UNION block. */ |
10350 | |
10351 | match |
10352 | gfc_match_union (void) |
10353 | { |
10354 | /* Counter used to give unique internal names to union types. */ |
10355 | static unsigned int gfc_union_id = 0; |
10356 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
10357 | gfc_symbol *sym; |
10358 | locus old_loc; |
10359 | |
10360 | old_loc = gfc_current_locus; |
10361 | |
10362 | if (gfc_match_eos () != MATCH_YES) |
10363 | { |
10364 | gfc_error ("Junk after UNION statement at %C" ); |
10365 | gfc_current_locus = old_loc; |
10366 | return MATCH_ERROR; |
10367 | } |
10368 | |
10369 | /* Unions are anonymous so we make up unique names for the symbol table |
10370 | which are invalid Fortran identifiers. */ |
10371 | snprintf (s: name, GFC_MAX_SYMBOL_LEN + 1, format: "UU$%u" , gfc_union_id++); |
10372 | |
10373 | if (!get_struct_decl (name, fl: FL_UNION, decl: &old_loc, result: &sym)) |
10374 | return MATCH_ERROR; |
10375 | |
10376 | gfc_new_block = sym; |
10377 | |
10378 | return MATCH_YES; |
10379 | } |
10380 | |
10381 | |
10382 | /* Match the beginning of a STRUCTURE declaration. This is similar to |
10383 | matching the beginning of a derived type declaration with a few |
10384 | twists. The resulting type symbol has no access control or other |
10385 | interesting attributes. */ |
10386 | |
10387 | match |
10388 | gfc_match_structure_decl (void) |
10389 | { |
10390 | /* Counter used to give unique internal names to anonymous structures. */ |
10391 | static unsigned int gfc_structure_id = 0; |
10392 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
10393 | gfc_symbol *sym; |
10394 | match m; |
10395 | locus where; |
10396 | |
10397 | if (!flag_dec_structure) |
10398 | { |
10399 | gfc_error ("%s at %C is a DEC extension, enable with " |
10400 | "%<-fdec-structure%>" , |
10401 | "STRUCTURE" ); |
10402 | return MATCH_ERROR; |
10403 | } |
10404 | |
10405 | name[0] = '\0'; |
10406 | |
10407 | m = gfc_match (" /%n/" , name); |
10408 | if (m != MATCH_YES) |
10409 | { |
10410 | /* Non-nested structure declarations require a structure name. */ |
10411 | if (!gfc_comp_struct (gfc_current_state ())) |
10412 | { |
10413 | gfc_error ("Structure name expected in non-nested structure " |
10414 | "declaration at %C" ); |
10415 | return MATCH_ERROR; |
10416 | } |
10417 | /* This is an anonymous structure; make up a unique name for it |
10418 | (upper-case letters never make it to symbol names from the source). |
10419 | The important thing is initializing the type variable |
10420 | and setting gfc_new_symbol, which is immediately used by |
10421 | parse_structure () and variable_decl () to add components of |
10422 | this type. */ |
10423 | snprintf (s: name, GFC_MAX_SYMBOL_LEN + 1, format: "SS$%u" , gfc_structure_id++); |
10424 | } |
10425 | |
10426 | where = gfc_current_locus; |
10427 | /* No field list allowed after non-nested structure declaration. */ |
10428 | if (!gfc_comp_struct (gfc_current_state ()) |
10429 | && gfc_match_eos () != MATCH_YES) |
10430 | { |
10431 | gfc_error ("Junk after non-nested STRUCTURE statement at %C" ); |
10432 | return MATCH_ERROR; |
10433 | } |
10434 | |
10435 | /* Make sure the name is not the name of an intrinsic type. */ |
10436 | if (gfc_is_intrinsic_typename (name)) |
10437 | { |
10438 | gfc_error ("Structure name %qs at %C cannot be the same as an" |
10439 | " intrinsic type" , name); |
10440 | return MATCH_ERROR; |
10441 | } |
10442 | |
10443 | /* Store the actual type symbol for the structure with an upper-case first |
10444 | letter (an invalid Fortran identifier). */ |
10445 | |
10446 | if (!get_struct_decl (name: gfc_dt_upper_string (name), fl: FL_STRUCT, decl: &where, result: &sym)) |
10447 | return MATCH_ERROR; |
10448 | |
10449 | gfc_new_block = sym; |
10450 | return MATCH_YES; |
10451 | } |
10452 | |
10453 | |
10454 | /* This function does some work to determine which matcher should be used to |
10455 | * match a statement beginning with "TYPE". This is used to disambiguate TYPE |
10456 | * as an alias for PRINT from derived type declarations, TYPE IS statements, |
10457 | * and [parameterized] derived type declarations. */ |
10458 | |
10459 | match |
10460 | gfc_match_type (gfc_statement *st) |
10461 | { |
10462 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
10463 | match m; |
10464 | locus old_loc; |
10465 | |
10466 | /* Requires -fdec. */ |
10467 | if (!flag_dec) |
10468 | return MATCH_NO; |
10469 | |
10470 | m = gfc_match ("type" ); |
10471 | if (m != MATCH_YES) |
10472 | return m; |
10473 | /* If we already have an error in the buffer, it is probably from failing to |
10474 | * match a derived type data declaration. Let it happen. */ |
10475 | else if (gfc_error_flag_test ()) |
10476 | return MATCH_NO; |
10477 | |
10478 | old_loc = gfc_current_locus; |
10479 | *st = ST_NONE; |
10480 | |
10481 | /* If we see an attribute list before anything else it's definitely a derived |
10482 | * type declaration. */ |
10483 | if (gfc_match (" ," ) == MATCH_YES || gfc_match (" ::" ) == MATCH_YES) |
10484 | goto derived; |
10485 | |
10486 | /* By now "TYPE" has already been matched. If we do not see a name, this may |
10487 | * be something like "TYPE *" or "TYPE <fmt>". */ |
10488 | m = gfc_match_name (name); |
10489 | if (m != MATCH_YES) |
10490 | { |
10491 | /* Let print match if it can, otherwise throw an error from |
10492 | * gfc_match_derived_decl. */ |
10493 | gfc_current_locus = old_loc; |
10494 | if (gfc_match_print () == MATCH_YES) |
10495 | { |
10496 | *st = ST_WRITE; |
10497 | return MATCH_YES; |
10498 | } |
10499 | goto derived; |
10500 | } |
10501 | |
10502 | /* Check for EOS. */ |
10503 | if (gfc_match_eos () == MATCH_YES) |
10504 | { |
10505 | /* By now we have "TYPE <name> <EOS>". Check first if the name is an |
10506 | * intrinsic typename - if so let gfc_match_derived_decl dump an error. |
10507 | * Otherwise if gfc_match_derived_decl fails it's probably an existing |
10508 | * symbol which can be printed. */ |
10509 | gfc_current_locus = old_loc; |
10510 | m = gfc_match_derived_decl (); |
10511 | if (gfc_is_intrinsic_typename (name) || m == MATCH_YES) |
10512 | { |
10513 | *st = ST_DERIVED_DECL; |
10514 | return m; |
10515 | } |
10516 | } |
10517 | else |
10518 | { |
10519 | /* Here we have "TYPE <name>". Check for <TYPE IS (> or a PDT declaration |
10520 | like <type name(parameter)>. */ |
10521 | gfc_gobble_whitespace (); |
10522 | bool paren = gfc_peek_ascii_char () == '('; |
10523 | if (paren) |
10524 | { |
10525 | if (strcmp (s1: "is" , s2: name) == 0) |
10526 | goto typeis; |
10527 | else |
10528 | goto derived; |
10529 | } |
10530 | } |
10531 | |
10532 | /* Treat TYPE... like PRINT... */ |
10533 | gfc_current_locus = old_loc; |
10534 | *st = ST_WRITE; |
10535 | return gfc_match_print (); |
10536 | |
10537 | derived: |
10538 | gfc_current_locus = old_loc; |
10539 | *st = ST_DERIVED_DECL; |
10540 | return gfc_match_derived_decl (); |
10541 | |
10542 | typeis: |
10543 | gfc_current_locus = old_loc; |
10544 | *st = ST_TYPE_IS; |
10545 | return gfc_match_type_is (); |
10546 | } |
10547 | |
10548 | |
10549 | /* Match the beginning of a derived type declaration. If a type name |
10550 | was the result of a function, then it is possible to have a symbol |
10551 | already to be known as a derived type yet have no components. */ |
10552 | |
10553 | match |
10554 | gfc_match_derived_decl (void) |
10555 | { |
10556 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
10557 | char parent[GFC_MAX_SYMBOL_LEN + 1]; |
10558 | symbol_attribute attr; |
10559 | gfc_symbol *sym, *gensym; |
10560 | gfc_symbol *extended; |
10561 | match m; |
10562 | match is_type_attr_spec = MATCH_NO; |
10563 | bool seen_attr = false; |
10564 | gfc_interface *intr = NULL, *head; |
10565 | bool parameterized_type = false; |
10566 | bool seen_colons = false; |
10567 | |
10568 | if (gfc_comp_struct (gfc_current_state ())) |
10569 | return MATCH_NO; |
10570 | |
10571 | name[0] = '\0'; |
10572 | parent[0] = '\0'; |
10573 | gfc_clear_attr (&attr); |
10574 | extended = NULL; |
10575 | |
10576 | do |
10577 | { |
10578 | is_type_attr_spec = gfc_get_type_attr_spec (attr: &attr, name: parent); |
10579 | if (is_type_attr_spec == MATCH_ERROR) |
10580 | return MATCH_ERROR; |
10581 | if (is_type_attr_spec == MATCH_YES) |
10582 | seen_attr = true; |
10583 | } while (is_type_attr_spec == MATCH_YES); |
10584 | |
10585 | /* Deal with derived type extensions. The extension attribute has |
10586 | been added to 'attr' but now the parent type must be found and |
10587 | checked. */ |
10588 | if (parent[0]) |
10589 | extended = check_extended_derived_type (name: parent); |
10590 | |
10591 | if (parent[0] && !extended) |
10592 | return MATCH_ERROR; |
10593 | |
10594 | m = gfc_match (" ::" ); |
10595 | if (m == MATCH_YES) |
10596 | { |
10597 | seen_colons = true; |
10598 | } |
10599 | else if (seen_attr) |
10600 | { |
10601 | gfc_error ("Expected :: in TYPE definition at %C" ); |
10602 | return MATCH_ERROR; |
10603 | } |
10604 | |
10605 | /* In free source form, need to check for TYPE XXX as oppose to TYPEXXX. |
10606 | But, we need to simply return for TYPE(. */ |
10607 | if (m == MATCH_NO && gfc_current_form == FORM_FREE) |
10608 | { |
10609 | char c = gfc_peek_ascii_char (); |
10610 | if (c == '(') |
10611 | return m; |
10612 | if (!gfc_is_whitespace (c)) |
10613 | { |
10614 | gfc_error ("Mangled derived type definition at %C" ); |
10615 | return MATCH_NO; |
10616 | } |
10617 | } |
10618 | |
10619 | m = gfc_match (" %n " , name); |
10620 | if (m != MATCH_YES) |
10621 | return m; |
10622 | |
10623 | /* Make sure that we don't identify TYPE IS (...) as a parameterized |
10624 | derived type named 'is'. |
10625 | TODO Expand the check, when 'name' = "is" by matching " (tname) " |
10626 | and checking if this is a(n intrinsic) typename. This picks up |
10627 | misplaced TYPE IS statements such as in select_type_1.f03. */ |
10628 | if (gfc_peek_ascii_char () == '(') |
10629 | { |
10630 | if (gfc_current_state () == COMP_SELECT_TYPE |
10631 | || (!seen_colons && !strcmp (s1: name, s2: "is" ))) |
10632 | return MATCH_NO; |
10633 | parameterized_type = true; |
10634 | } |
10635 | |
10636 | m = gfc_match_eos (); |
10637 | if (m != MATCH_YES && !parameterized_type) |
10638 | return m; |
10639 | |
10640 | /* Make sure the name is not the name of an intrinsic type. */ |
10641 | if (gfc_is_intrinsic_typename (name)) |
10642 | { |
10643 | gfc_error ("Type name %qs at %C cannot be the same as an intrinsic " |
10644 | "type" , name); |
10645 | return MATCH_ERROR; |
10646 | } |
10647 | |
10648 | if (gfc_get_symbol (name, NULL, &gensym)) |
10649 | return MATCH_ERROR; |
10650 | |
10651 | if (!gensym->attr.generic && gensym->ts.type != BT_UNKNOWN) |
10652 | { |
10653 | if (gensym->ts.u.derived) |
10654 | gfc_error ("Derived type name %qs at %C already has a basic type " |
10655 | "of %s" , gensym->name, gfc_typename (&gensym->ts)); |
10656 | else |
10657 | gfc_error ("Derived type name %qs at %C already has a basic type" , |
10658 | gensym->name); |
10659 | return MATCH_ERROR; |
10660 | } |
10661 | |
10662 | if (!gensym->attr.generic |
10663 | && !gfc_add_generic (&gensym->attr, gensym->name, NULL)) |
10664 | return MATCH_ERROR; |
10665 | |
10666 | if (!gensym->attr.function |
10667 | && !gfc_add_function (&gensym->attr, gensym->name, NULL)) |
10668 | return MATCH_ERROR; |
10669 | |
10670 | if (gensym->attr.dummy) |
10671 | { |
10672 | gfc_error ("Dummy argument %qs at %L cannot be a derived type at %C" , |
10673 | name, &gensym->declared_at); |
10674 | return MATCH_ERROR; |
10675 | } |
10676 | |
10677 | sym = gfc_find_dt_in_generic (gensym); |
10678 | |
10679 | if (sym && (sym->components != NULL || sym->attr.zero_comp)) |
10680 | { |
10681 | gfc_error ("Derived type definition of %qs at %C has already been " |
10682 | "defined" , sym->name); |
10683 | return MATCH_ERROR; |
10684 | } |
10685 | |
10686 | if (!sym) |
10687 | { |
10688 | /* Use upper case to save the actual derived-type symbol. */ |
10689 | gfc_get_symbol (gfc_dt_upper_string (gensym->name), NULL, &sym); |
10690 | sym->name = gfc_get_string ("%s" , gensym->name); |
10691 | head = gensym->generic; |
10692 | intr = gfc_get_interface (); |
10693 | intr->sym = sym; |
10694 | intr->where = gfc_current_locus; |
10695 | intr->sym->declared_at = gfc_current_locus; |
10696 | intr->next = head; |
10697 | gensym->generic = intr; |
10698 | gensym->attr.if_source = IFSRC_DECL; |
10699 | } |
10700 | |
10701 | /* The symbol may already have the derived attribute without the |
10702 | components. The ways this can happen is via a function |
10703 | definition, an INTRINSIC statement or a subtype in another |
10704 | derived type that is a pointer. The first part of the AND clause |
10705 | is true if the symbol is not the return value of a function. */ |
10706 | if (sym->attr.flavor != FL_DERIVED |
10707 | && !gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL)) |
10708 | return MATCH_ERROR; |
10709 | |
10710 | if (attr.access != ACCESS_UNKNOWN |
10711 | && !gfc_add_access (&sym->attr, attr.access, sym->name, NULL)) |
10712 | return MATCH_ERROR; |
10713 | else if (sym->attr.access == ACCESS_UNKNOWN |
10714 | && gensym->attr.access != ACCESS_UNKNOWN |
10715 | && !gfc_add_access (&sym->attr, gensym->attr.access, |
10716 | sym->name, NULL)) |
10717 | return MATCH_ERROR; |
10718 | |
10719 | if (sym->attr.access != ACCESS_UNKNOWN |
10720 | && gensym->attr.access == ACCESS_UNKNOWN) |
10721 | gensym->attr.access = sym->attr.access; |
10722 | |
10723 | /* See if the derived type was labeled as bind(c). */ |
10724 | if (attr.is_bind_c != 0) |
10725 | sym->attr.is_bind_c = attr.is_bind_c; |
10726 | |
10727 | /* Construct the f2k_derived namespace if it is not yet there. */ |
10728 | if (!sym->f2k_derived) |
10729 | sym->f2k_derived = gfc_get_namespace (NULL, 0); |
10730 | |
10731 | if (parameterized_type) |
10732 | { |
10733 | /* Ignore error or mismatches by going to the end of the statement |
10734 | in order to avoid the component declarations causing problems. */ |
10735 | m = gfc_match_formal_arglist (progname: sym, st_flag: 0, null_flag: 0, typeparam: true); |
10736 | if (m != MATCH_YES) |
10737 | gfc_error_recovery (); |
10738 | else |
10739 | sym->attr.pdt_template = 1; |
10740 | m = gfc_match_eos (); |
10741 | if (m != MATCH_YES) |
10742 | { |
10743 | gfc_error_recovery (); |
10744 | gfc_error_now ("Garbage after PARAMETERIZED TYPE declaration at %C" ); |
10745 | } |
10746 | } |
10747 | |
10748 | if (extended && !sym->components) |
10749 | { |
10750 | gfc_component *p; |
10751 | gfc_formal_arglist *f, *g, *h; |
10752 | |
10753 | /* Add the extended derived type as the first component. */ |
10754 | gfc_add_component (sym, parent, &p); |
10755 | extended->refs++; |
10756 | gfc_set_sym_referenced (extended); |
10757 | |
10758 | p->ts.type = BT_DERIVED; |
10759 | p->ts.u.derived = extended; |
10760 | p->initializer = gfc_default_initializer (&p->ts); |
10761 | |
10762 | /* Set extension level. */ |
10763 | if (extended->attr.extension == 255) |
10764 | { |
10765 | /* Since the extension field is 8 bit wide, we can only have |
10766 | up to 255 extension levels. */ |
10767 | gfc_error ("Maximum extension level reached with type %qs at %L" , |
10768 | extended->name, &extended->declared_at); |
10769 | return MATCH_ERROR; |
10770 | } |
10771 | sym->attr.extension = extended->attr.extension + 1; |
10772 | |
10773 | /* Provide the links between the extended type and its extension. */ |
10774 | if (!extended->f2k_derived) |
10775 | extended->f2k_derived = gfc_get_namespace (NULL, 0); |
10776 | |
10777 | /* Copy the extended type-param-name-list from the extended type, |
10778 | append those of the extension and add the whole lot to the |
10779 | extension. */ |
10780 | if (extended->attr.pdt_template) |
10781 | { |
10782 | g = h = NULL; |
10783 | sym->attr.pdt_template = 1; |
10784 | for (f = extended->formal; f; f = f->next) |
10785 | { |
10786 | if (f == extended->formal) |
10787 | { |
10788 | g = gfc_get_formal_arglist (); |
10789 | h = g; |
10790 | } |
10791 | else |
10792 | { |
10793 | g->next = gfc_get_formal_arglist (); |
10794 | g = g->next; |
10795 | } |
10796 | g->sym = f->sym; |
10797 | } |
10798 | g->next = sym->formal; |
10799 | sym->formal = h; |
10800 | } |
10801 | } |
10802 | |
10803 | if (!sym->hash_value) |
10804 | /* Set the hash for the compound name for this type. */ |
10805 | sym->hash_value = gfc_hash_value (sym); |
10806 | |
10807 | /* Take over the ABSTRACT attribute. */ |
10808 | sym->attr.abstract = attr.abstract; |
10809 | |
10810 | gfc_new_block = sym; |
10811 | |
10812 | return MATCH_YES; |
10813 | } |
10814 | |
10815 | |
10816 | /* Cray Pointees can be declared as: |
10817 | pointer (ipt, a (n,m,...,*)) */ |
10818 | |
10819 | match |
10820 | gfc_mod_pointee_as (gfc_array_spec *as) |
10821 | { |
10822 | as->cray_pointee = true; /* This will be useful to know later. */ |
10823 | if (as->type == AS_ASSUMED_SIZE) |
10824 | as->cp_was_assumed = true; |
10825 | else if (as->type == AS_ASSUMED_SHAPE) |
10826 | { |
10827 | gfc_error ("Cray Pointee at %C cannot be assumed shape array" ); |
10828 | return MATCH_ERROR; |
10829 | } |
10830 | return MATCH_YES; |
10831 | } |
10832 | |
10833 | |
10834 | /* Match the enum definition statement, here we are trying to match |
10835 | the first line of enum definition statement. |
10836 | Returns MATCH_YES if match is found. */ |
10837 | |
10838 | match |
10839 | gfc_match_enum (void) |
10840 | { |
10841 | match m; |
10842 | |
10843 | m = gfc_match_eos (); |
10844 | if (m != MATCH_YES) |
10845 | return m; |
10846 | |
10847 | if (!gfc_notify_std (GFC_STD_F2003, "ENUM and ENUMERATOR at %C" )) |
10848 | return MATCH_ERROR; |
10849 | |
10850 | return MATCH_YES; |
10851 | } |
10852 | |
10853 | |
10854 | /* Returns an initializer whose value is one higher than the value of the |
10855 | LAST_INITIALIZER argument. If the argument is NULL, the |
10856 | initializers value will be set to zero. The initializer's kind |
10857 | will be set to gfc_c_int_kind. |
10858 | |
10859 | If -fshort-enums is given, the appropriate kind will be selected |
10860 | later after all enumerators have been parsed. A warning is issued |
10861 | here if an initializer exceeds gfc_c_int_kind. */ |
10862 | |
10863 | static gfc_expr * |
10864 | enum_initializer (gfc_expr *last_initializer, locus where) |
10865 | { |
10866 | gfc_expr *result; |
10867 | result = gfc_get_constant_expr (BT_INTEGER, gfc_c_int_kind, &where); |
10868 | |
10869 | mpz_init (result->value.integer); |
10870 | |
10871 | if (last_initializer != NULL) |
10872 | { |
10873 | mpz_add_ui (result->value.integer, last_initializer->value.integer, 1); |
10874 | result->where = last_initializer->where; |
10875 | |
10876 | if (gfc_check_integer_range (p: result->value.integer, |
10877 | kind: gfc_c_int_kind) != ARITH_OK) |
10878 | { |
10879 | gfc_error ("Enumerator exceeds the C integer type at %C" ); |
10880 | return NULL; |
10881 | } |
10882 | } |
10883 | else |
10884 | { |
10885 | /* Control comes here, if it's the very first enumerator and no |
10886 | initializer has been given. It will be initialized to zero. */ |
10887 | mpz_set_si (result->value.integer, 0); |
10888 | } |
10889 | |
10890 | return result; |
10891 | } |
10892 | |
10893 | |
10894 | /* Match a variable name with an optional initializer. When this |
10895 | subroutine is called, a variable is expected to be parsed next. |
10896 | Depending on what is happening at the moment, updates either the |
10897 | symbol table or the current interface. */ |
10898 | |
10899 | static match |
10900 | enumerator_decl (void) |
10901 | { |
10902 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
10903 | gfc_expr *initializer; |
10904 | gfc_array_spec *as = NULL; |
10905 | gfc_symbol *sym; |
10906 | locus var_locus; |
10907 | match m; |
10908 | bool t; |
10909 | locus old_locus; |
10910 | |
10911 | initializer = NULL; |
10912 | old_locus = gfc_current_locus; |
10913 | |
10914 | /* When we get here, we've just matched a list of attributes and |
10915 | maybe a type and a double colon. The next thing we expect to see |
10916 | is the name of the symbol. */ |
10917 | m = gfc_match_name (name); |
10918 | if (m != MATCH_YES) |
10919 | goto cleanup; |
10920 | |
10921 | var_locus = gfc_current_locus; |
10922 | |
10923 | /* OK, we've successfully matched the declaration. Now put the |
10924 | symbol in the current namespace. If we fail to create the symbol, |
10925 | bail out. */ |
10926 | if (!build_sym (name, NULL, cl_deferred: false, as: &as, var_locus: &var_locus)) |
10927 | { |
10928 | m = MATCH_ERROR; |
10929 | goto cleanup; |
10930 | } |
10931 | |
10932 | /* The double colon must be present in order to have initializers. |
10933 | Otherwise the statement is ambiguous with an assignment statement. */ |
10934 | if (colon_seen) |
10935 | { |
10936 | if (gfc_match_char ('=') == MATCH_YES) |
10937 | { |
10938 | m = gfc_match_init_expr (&initializer); |
10939 | if (m == MATCH_NO) |
10940 | { |
10941 | gfc_error ("Expected an initialization expression at %C" ); |
10942 | m = MATCH_ERROR; |
10943 | } |
10944 | |
10945 | if (m != MATCH_YES) |
10946 | goto cleanup; |
10947 | } |
10948 | } |
10949 | |
10950 | /* If we do not have an initializer, the initialization value of the |
10951 | previous enumerator (stored in last_initializer) is incremented |
10952 | by 1 and is used to initialize the current enumerator. */ |
10953 | if (initializer == NULL) |
10954 | initializer = enum_initializer (last_initializer, where: old_locus); |
10955 | |
10956 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) |
10957 | { |
10958 | gfc_error ("ENUMERATOR %L not initialized with integer expression" , |
10959 | &var_locus); |
10960 | m = MATCH_ERROR; |
10961 | goto cleanup; |
10962 | } |
10963 | |
10964 | /* Store this current initializer, for the next enumerator variable |
10965 | to be parsed. add_init_expr_to_sym() zeros initializer, so we |
10966 | use last_initializer below. */ |
10967 | last_initializer = initializer; |
10968 | t = add_init_expr_to_sym (name, initp: &initializer, var_locus: &var_locus); |
10969 | |
10970 | /* Maintain enumerator history. */ |
10971 | gfc_find_symbol (name, NULL, 0, &sym); |
10972 | create_enum_history (sym, init: last_initializer); |
10973 | |
10974 | return (t) ? MATCH_YES : MATCH_ERROR; |
10975 | |
10976 | cleanup: |
10977 | /* Free stuff up and return. */ |
10978 | gfc_free_expr (initializer); |
10979 | |
10980 | return m; |
10981 | } |
10982 | |
10983 | |
10984 | /* Match the enumerator definition statement. */ |
10985 | |
10986 | match |
10987 | gfc_match_enumerator_def (void) |
10988 | { |
10989 | match m; |
10990 | bool t; |
10991 | |
10992 | gfc_clear_ts (¤t_ts); |
10993 | |
10994 | m = gfc_match (" enumerator" ); |
10995 | if (m != MATCH_YES) |
10996 | return m; |
10997 | |
10998 | m = gfc_match (" :: " ); |
10999 | if (m == MATCH_ERROR) |
11000 | return m; |
11001 | |
11002 | colon_seen = (m == MATCH_YES); |
11003 | |
11004 | if (gfc_current_state () != COMP_ENUM) |
11005 | { |
11006 | gfc_error ("ENUM definition statement expected before %C" ); |
11007 | gfc_free_enum_history (); |
11008 | return MATCH_ERROR; |
11009 | } |
11010 | |
11011 | (¤t_ts)->type = BT_INTEGER; |
11012 | (¤t_ts)->kind = gfc_c_int_kind; |
11013 | |
11014 | gfc_clear_attr (¤t_attr); |
11015 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); |
11016 | if (!t) |
11017 | { |
11018 | m = MATCH_ERROR; |
11019 | goto cleanup; |
11020 | } |
11021 | |
11022 | for (;;) |
11023 | { |
11024 | m = enumerator_decl (); |
11025 | if (m == MATCH_ERROR) |
11026 | { |
11027 | gfc_free_enum_history (); |
11028 | goto cleanup; |
11029 | } |
11030 | if (m == MATCH_NO) |
11031 | break; |
11032 | |
11033 | if (gfc_match_eos () == MATCH_YES) |
11034 | goto cleanup; |
11035 | if (gfc_match_char (',') != MATCH_YES) |
11036 | break; |
11037 | } |
11038 | |
11039 | if (gfc_current_state () == COMP_ENUM) |
11040 | { |
11041 | gfc_free_enum_history (); |
11042 | gfc_error ("Syntax error in ENUMERATOR definition at %C" ); |
11043 | m = MATCH_ERROR; |
11044 | } |
11045 | |
11046 | cleanup: |
11047 | gfc_free_array_spec (current_as); |
11048 | current_as = NULL; |
11049 | return m; |
11050 | |
11051 | } |
11052 | |
11053 | |
11054 | /* Match binding attributes. */ |
11055 | |
11056 | static match |
11057 | match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc) |
11058 | { |
11059 | bool found_passing = false; |
11060 | bool seen_ptr = false; |
11061 | match m = MATCH_YES; |
11062 | |
11063 | /* Initialize to defaults. Do so even before the MATCH_NO check so that in |
11064 | this case the defaults are in there. */ |
11065 | ba->access = ACCESS_UNKNOWN; |
11066 | ba->pass_arg = NULL; |
11067 | ba->pass_arg_num = 0; |
11068 | ba->nopass = 0; |
11069 | ba->non_overridable = 0; |
11070 | ba->deferred = 0; |
11071 | ba->ppc = ppc; |
11072 | |
11073 | /* If we find a comma, we believe there are binding attributes. */ |
11074 | m = gfc_match_char (','); |
11075 | if (m == MATCH_NO) |
11076 | goto done; |
11077 | |
11078 | do |
11079 | { |
11080 | /* Access specifier. */ |
11081 | |
11082 | m = gfc_match (" public" ); |
11083 | if (m == MATCH_ERROR) |
11084 | goto error; |
11085 | if (m == MATCH_YES) |
11086 | { |
11087 | if (ba->access != ACCESS_UNKNOWN) |
11088 | { |
11089 | gfc_error ("Duplicate access-specifier at %C" ); |
11090 | goto error; |
11091 | } |
11092 | |
11093 | ba->access = ACCESS_PUBLIC; |
11094 | continue; |
11095 | } |
11096 | |
11097 | m = gfc_match (" private" ); |
11098 | if (m == MATCH_ERROR) |
11099 | goto error; |
11100 | if (m == MATCH_YES) |
11101 | { |
11102 | if (ba->access != ACCESS_UNKNOWN) |
11103 | { |
11104 | gfc_error ("Duplicate access-specifier at %C" ); |
11105 | goto error; |
11106 | } |
11107 | |
11108 | ba->access = ACCESS_PRIVATE; |
11109 | continue; |
11110 | } |
11111 | |
11112 | /* If inside GENERIC, the following is not allowed. */ |
11113 | if (!generic) |
11114 | { |
11115 | |
11116 | /* NOPASS flag. */ |
11117 | m = gfc_match (" nopass" ); |
11118 | if (m == MATCH_ERROR) |
11119 | goto error; |
11120 | if (m == MATCH_YES) |
11121 | { |
11122 | if (found_passing) |
11123 | { |
11124 | gfc_error ("Binding attributes already specify passing," |
11125 | " illegal NOPASS at %C" ); |
11126 | goto error; |
11127 | } |
11128 | |
11129 | found_passing = true; |
11130 | ba->nopass = 1; |
11131 | continue; |
11132 | } |
11133 | |
11134 | /* PASS possibly including argument. */ |
11135 | m = gfc_match (" pass" ); |
11136 | if (m == MATCH_ERROR) |
11137 | goto error; |
11138 | if (m == MATCH_YES) |
11139 | { |
11140 | char arg[GFC_MAX_SYMBOL_LEN + 1]; |
11141 | |
11142 | if (found_passing) |
11143 | { |
11144 | gfc_error ("Binding attributes already specify passing," |
11145 | " illegal PASS at %C" ); |
11146 | goto error; |
11147 | } |
11148 | |
11149 | m = gfc_match (" ( %n )" , arg); |
11150 | if (m == MATCH_ERROR) |
11151 | goto error; |
11152 | if (m == MATCH_YES) |
11153 | ba->pass_arg = gfc_get_string ("%s" , arg); |
11154 | gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL)); |
11155 | |
11156 | found_passing = true; |
11157 | ba->nopass = 0; |
11158 | continue; |
11159 | } |
11160 | |
11161 | if (ppc) |
11162 | { |
11163 | /* POINTER flag. */ |
11164 | m = gfc_match (" pointer" ); |
11165 | if (m == MATCH_ERROR) |
11166 | goto error; |
11167 | if (m == MATCH_YES) |
11168 | { |
11169 | if (seen_ptr) |
11170 | { |
11171 | gfc_error ("Duplicate POINTER attribute at %C" ); |
11172 | goto error; |
11173 | } |
11174 | |
11175 | seen_ptr = true; |
11176 | continue; |
11177 | } |
11178 | } |
11179 | else |
11180 | { |
11181 | /* NON_OVERRIDABLE flag. */ |
11182 | m = gfc_match (" non_overridable" ); |
11183 | if (m == MATCH_ERROR) |
11184 | goto error; |
11185 | if (m == MATCH_YES) |
11186 | { |
11187 | if (ba->non_overridable) |
11188 | { |
11189 | gfc_error ("Duplicate NON_OVERRIDABLE at %C" ); |
11190 | goto error; |
11191 | } |
11192 | |
11193 | ba->non_overridable = 1; |
11194 | continue; |
11195 | } |
11196 | |
11197 | /* DEFERRED flag. */ |
11198 | m = gfc_match (" deferred" ); |
11199 | if (m == MATCH_ERROR) |
11200 | goto error; |
11201 | if (m == MATCH_YES) |
11202 | { |
11203 | if (ba->deferred) |
11204 | { |
11205 | gfc_error ("Duplicate DEFERRED at %C" ); |
11206 | goto error; |
11207 | } |
11208 | |
11209 | ba->deferred = 1; |
11210 | continue; |
11211 | } |
11212 | } |
11213 | |
11214 | } |
11215 | |
11216 | /* Nothing matching found. */ |
11217 | if (generic) |
11218 | gfc_error ("Expected access-specifier at %C" ); |
11219 | else |
11220 | gfc_error ("Expected binding attribute at %C" ); |
11221 | goto error; |
11222 | } |
11223 | while (gfc_match_char (',') == MATCH_YES); |
11224 | |
11225 | /* NON_OVERRIDABLE and DEFERRED exclude themselves. */ |
11226 | if (ba->non_overridable && ba->deferred) |
11227 | { |
11228 | gfc_error ("NON_OVERRIDABLE and DEFERRED cannot both appear at %C" ); |
11229 | goto error; |
11230 | } |
11231 | |
11232 | m = MATCH_YES; |
11233 | |
11234 | done: |
11235 | if (ba->access == ACCESS_UNKNOWN) |
11236 | ba->access = ppc ? gfc_current_block()->component_access |
11237 | : gfc_typebound_default_access; |
11238 | |
11239 | if (ppc && !seen_ptr) |
11240 | { |
11241 | gfc_error ("POINTER attribute is required for procedure pointer component" |
11242 | " at %C" ); |
11243 | goto error; |
11244 | } |
11245 | |
11246 | return m; |
11247 | |
11248 | error: |
11249 | return MATCH_ERROR; |
11250 | } |
11251 | |
11252 | |
11253 | /* Match a PROCEDURE specific binding inside a derived type. */ |
11254 | |
11255 | static match |
11256 | match_procedure_in_type (void) |
11257 | { |
11258 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
11259 | char target_buf[GFC_MAX_SYMBOL_LEN + 1]; |
11260 | char* target = NULL, *ifc = NULL; |
11261 | gfc_typebound_proc tb; |
11262 | bool seen_colons; |
11263 | bool seen_attrs; |
11264 | match m; |
11265 | gfc_symtree* stree; |
11266 | gfc_namespace* ns; |
11267 | gfc_symbol* block; |
11268 | int num; |
11269 | |
11270 | /* Check current state. */ |
11271 | gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS); |
11272 | block = gfc_state_stack->previous->sym; |
11273 | gcc_assert (block); |
11274 | |
11275 | /* Try to match PROCEDURE(interface). */ |
11276 | if (gfc_match (" (" ) == MATCH_YES) |
11277 | { |
11278 | m = gfc_match_name (target_buf); |
11279 | if (m == MATCH_ERROR) |
11280 | return m; |
11281 | if (m != MATCH_YES) |
11282 | { |
11283 | gfc_error ("Interface-name expected after %<(%> at %C" ); |
11284 | return MATCH_ERROR; |
11285 | } |
11286 | |
11287 | if (gfc_match (" )" ) != MATCH_YES) |
11288 | { |
11289 | gfc_error ("%<)%> expected at %C" ); |
11290 | return MATCH_ERROR; |
11291 | } |
11292 | |
11293 | ifc = target_buf; |
11294 | } |
11295 | |
11296 | /* Construct the data structure. */ |
11297 | memset (s: &tb, c: 0, n: sizeof (tb)); |
11298 | tb.where = gfc_current_locus; |
11299 | |
11300 | /* Match binding attributes. */ |
11301 | m = match_binding_attributes (ba: &tb, generic: false, ppc: false); |
11302 | if (m == MATCH_ERROR) |
11303 | return m; |
11304 | seen_attrs = (m == MATCH_YES); |
11305 | |
11306 | /* Check that attribute DEFERRED is given if an interface is specified. */ |
11307 | if (tb.deferred && !ifc) |
11308 | { |
11309 | gfc_error ("Interface must be specified for DEFERRED binding at %C" ); |
11310 | return MATCH_ERROR; |
11311 | } |
11312 | if (ifc && !tb.deferred) |
11313 | { |
11314 | gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED" ); |
11315 | return MATCH_ERROR; |
11316 | } |
11317 | |
11318 | /* Match the colons. */ |
11319 | m = gfc_match (" ::" ); |
11320 | if (m == MATCH_ERROR) |
11321 | return m; |
11322 | seen_colons = (m == MATCH_YES); |
11323 | if (seen_attrs && !seen_colons) |
11324 | { |
11325 | gfc_error ("Expected %<::%> after binding-attributes at %C" ); |
11326 | return MATCH_ERROR; |
11327 | } |
11328 | |
11329 | /* Match the binding names. */ |
11330 | for(num=1;;num++) |
11331 | { |
11332 | m = gfc_match_name (name); |
11333 | if (m == MATCH_ERROR) |
11334 | return m; |
11335 | if (m == MATCH_NO) |
11336 | { |
11337 | gfc_error ("Expected binding name at %C" ); |
11338 | return MATCH_ERROR; |
11339 | } |
11340 | |
11341 | if (num>1 && !gfc_notify_std (GFC_STD_F2008, "PROCEDURE list at %C" )) |
11342 | return MATCH_ERROR; |
11343 | |
11344 | /* Try to match the '=> target', if it's there. */ |
11345 | target = ifc; |
11346 | m = gfc_match (" =>" ); |
11347 | if (m == MATCH_ERROR) |
11348 | return m; |
11349 | if (m == MATCH_YES) |
11350 | { |
11351 | if (tb.deferred) |
11352 | { |
11353 | gfc_error ("%<=> target%> is invalid for DEFERRED binding at %C" ); |
11354 | return MATCH_ERROR; |
11355 | } |
11356 | |
11357 | if (!seen_colons) |
11358 | { |
11359 | gfc_error ("%<::%> needed in PROCEDURE binding with explicit target" |
11360 | " at %C" ); |
11361 | return MATCH_ERROR; |
11362 | } |
11363 | |
11364 | m = gfc_match_name (target_buf); |
11365 | if (m == MATCH_ERROR) |
11366 | return m; |
11367 | if (m == MATCH_NO) |
11368 | { |
11369 | gfc_error ("Expected binding target after %<=>%> at %C" ); |
11370 | return MATCH_ERROR; |
11371 | } |
11372 | target = target_buf; |
11373 | } |
11374 | |
11375 | /* If no target was found, it has the same name as the binding. */ |
11376 | if (!target) |
11377 | target = name; |
11378 | |
11379 | /* Get the namespace to insert the symbols into. */ |
11380 | ns = block->f2k_derived; |
11381 | gcc_assert (ns); |
11382 | |
11383 | /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */ |
11384 | if (tb.deferred && !block->attr.abstract) |
11385 | { |
11386 | gfc_error ("Type %qs containing DEFERRED binding at %C " |
11387 | "is not ABSTRACT" , block->name); |
11388 | return MATCH_ERROR; |
11389 | } |
11390 | |
11391 | /* See if we already have a binding with this name in the symtree which |
11392 | would be an error. If a GENERIC already targeted this binding, it may |
11393 | be already there but then typebound is still NULL. */ |
11394 | stree = gfc_find_symtree (ns->tb_sym_root, name); |
11395 | if (stree && stree->n.tb) |
11396 | { |
11397 | gfc_error ("There is already a procedure with binding name %qs for " |
11398 | "the derived type %qs at %C" , name, block->name); |
11399 | return MATCH_ERROR; |
11400 | } |
11401 | |
11402 | /* Insert it and set attributes. */ |
11403 | |
11404 | if (!stree) |
11405 | { |
11406 | stree = gfc_new_symtree (&ns->tb_sym_root, name); |
11407 | gcc_assert (stree); |
11408 | } |
11409 | stree->n.tb = gfc_get_typebound_proc (&tb); |
11410 | |
11411 | if (gfc_get_sym_tree (target, gfc_current_ns, &stree->n.tb->u.specific, |
11412 | false)) |
11413 | return MATCH_ERROR; |
11414 | gfc_set_sym_referenced (stree->n.tb->u.specific->n.sym); |
11415 | gfc_add_flavor(&stree->n.tb->u.specific->n.sym->attr, FL_PROCEDURE, |
11416 | target, &stree->n.tb->u.specific->n.sym->declared_at); |
11417 | |
11418 | if (gfc_match_eos () == MATCH_YES) |
11419 | return MATCH_YES; |
11420 | if (gfc_match_char (',') != MATCH_YES) |
11421 | goto syntax; |
11422 | } |
11423 | |
11424 | syntax: |
11425 | gfc_error ("Syntax error in PROCEDURE statement at %C" ); |
11426 | return MATCH_ERROR; |
11427 | } |
11428 | |
11429 | |
11430 | /* Match a GENERIC procedure binding inside a derived type. */ |
11431 | |
11432 | match |
11433 | gfc_match_generic (void) |
11434 | { |
11435 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
11436 | char bind_name[GFC_MAX_SYMBOL_LEN + 16]; /* Allow space for OPERATOR(...). */ |
11437 | gfc_symbol* block; |
11438 | gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */ |
11439 | gfc_typebound_proc* tb; |
11440 | gfc_namespace* ns; |
11441 | interface_type op_type; |
11442 | gfc_intrinsic_op op; |
11443 | match m; |
11444 | |
11445 | /* Check current state. */ |
11446 | if (gfc_current_state () == COMP_DERIVED) |
11447 | { |
11448 | gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS" ); |
11449 | return MATCH_ERROR; |
11450 | } |
11451 | if (gfc_current_state () != COMP_DERIVED_CONTAINS) |
11452 | return MATCH_NO; |
11453 | block = gfc_state_stack->previous->sym; |
11454 | ns = block->f2k_derived; |
11455 | gcc_assert (block && ns); |
11456 | |
11457 | memset (s: &tbattr, c: 0, n: sizeof (tbattr)); |
11458 | tbattr.where = gfc_current_locus; |
11459 | |
11460 | /* See if we get an access-specifier. */ |
11461 | m = match_binding_attributes (ba: &tbattr, generic: true, ppc: false); |
11462 | if (m == MATCH_ERROR) |
11463 | goto error; |
11464 | |
11465 | /* Now the colons, those are required. */ |
11466 | if (gfc_match (" ::" ) != MATCH_YES) |
11467 | { |
11468 | gfc_error ("Expected %<::%> at %C" ); |
11469 | goto error; |
11470 | } |
11471 | |
11472 | /* Match the binding name; depending on type (operator / generic) format |
11473 | it for future error messages into bind_name. */ |
11474 | |
11475 | m = gfc_match_generic_spec (&op_type, name, &op); |
11476 | if (m == MATCH_ERROR) |
11477 | return MATCH_ERROR; |
11478 | if (m == MATCH_NO) |
11479 | { |
11480 | gfc_error ("Expected generic name or operator descriptor at %C" ); |
11481 | goto error; |
11482 | } |
11483 | |
11484 | switch (op_type) |
11485 | { |
11486 | case INTERFACE_GENERIC: |
11487 | case INTERFACE_DTIO: |
11488 | snprintf (s: bind_name, maxlen: sizeof (bind_name), format: "%s" , name); |
11489 | break; |
11490 | |
11491 | case INTERFACE_USER_OP: |
11492 | snprintf (s: bind_name, maxlen: sizeof (bind_name), format: "OPERATOR(.%s.)" , name); |
11493 | break; |
11494 | |
11495 | case INTERFACE_INTRINSIC_OP: |
11496 | snprintf (s: bind_name, maxlen: sizeof (bind_name), format: "OPERATOR(%s)" , |
11497 | gfc_op2string (op)); |
11498 | break; |
11499 | |
11500 | case INTERFACE_NAMELESS: |
11501 | gfc_error ("Malformed GENERIC statement at %C" ); |
11502 | goto error; |
11503 | break; |
11504 | |
11505 | default: |
11506 | gcc_unreachable (); |
11507 | } |
11508 | |
11509 | /* Match the required =>. */ |
11510 | if (gfc_match (" =>" ) != MATCH_YES) |
11511 | { |
11512 | gfc_error ("Expected %<=>%> at %C" ); |
11513 | goto error; |
11514 | } |
11515 | |
11516 | /* Try to find existing GENERIC binding with this name / for this operator; |
11517 | if there is something, check that it is another GENERIC and then extend |
11518 | it rather than building a new node. Otherwise, create it and put it |
11519 | at the right position. */ |
11520 | |
11521 | switch (op_type) |
11522 | { |
11523 | case INTERFACE_DTIO: |
11524 | case INTERFACE_USER_OP: |
11525 | case INTERFACE_GENERIC: |
11526 | { |
11527 | const bool is_op = (op_type == INTERFACE_USER_OP); |
11528 | gfc_symtree* st; |
11529 | |
11530 | st = gfc_find_symtree (is_op ? ns->tb_uop_root : ns->tb_sym_root, name); |
11531 | tb = st ? st->n.tb : NULL; |
11532 | break; |
11533 | } |
11534 | |
11535 | case INTERFACE_INTRINSIC_OP: |
11536 | tb = ns->tb_op[op]; |
11537 | break; |
11538 | |
11539 | default: |
11540 | gcc_unreachable (); |
11541 | } |
11542 | |
11543 | if (tb) |
11544 | { |
11545 | if (!tb->is_generic) |
11546 | { |
11547 | gcc_assert (op_type == INTERFACE_GENERIC); |
11548 | gfc_error ("There's already a non-generic procedure with binding name" |
11549 | " %qs for the derived type %qs at %C" , |
11550 | bind_name, block->name); |
11551 | goto error; |
11552 | } |
11553 | |
11554 | if (tb->access != tbattr.access) |
11555 | { |
11556 | gfc_error ("Binding at %C must have the same access as already" |
11557 | " defined binding %qs" , bind_name); |
11558 | goto error; |
11559 | } |
11560 | } |
11561 | else |
11562 | { |
11563 | tb = gfc_get_typebound_proc (NULL); |
11564 | tb->where = gfc_current_locus; |
11565 | tb->access = tbattr.access; |
11566 | tb->is_generic = 1; |
11567 | tb->u.generic = NULL; |
11568 | |
11569 | switch (op_type) |
11570 | { |
11571 | case INTERFACE_DTIO: |
11572 | case INTERFACE_GENERIC: |
11573 | case INTERFACE_USER_OP: |
11574 | { |
11575 | const bool is_op = (op_type == INTERFACE_USER_OP); |
11576 | gfc_symtree* st = gfc_get_tbp_symtree (is_op ? &ns->tb_uop_root : |
11577 | &ns->tb_sym_root, name); |
11578 | gcc_assert (st); |
11579 | st->n.tb = tb; |
11580 | |
11581 | break; |
11582 | } |
11583 | |
11584 | case INTERFACE_INTRINSIC_OP: |
11585 | ns->tb_op[op] = tb; |
11586 | break; |
11587 | |
11588 | default: |
11589 | gcc_unreachable (); |
11590 | } |
11591 | } |
11592 | |
11593 | /* Now, match all following names as specific targets. */ |
11594 | do |
11595 | { |
11596 | gfc_symtree* target_st; |
11597 | gfc_tbp_generic* target; |
11598 | |
11599 | m = gfc_match_name (name); |
11600 | if (m == MATCH_ERROR) |
11601 | goto error; |
11602 | if (m == MATCH_NO) |
11603 | { |
11604 | gfc_error ("Expected specific binding name at %C" ); |
11605 | goto error; |
11606 | } |
11607 | |
11608 | target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name); |
11609 | |
11610 | /* See if this is a duplicate specification. */ |
11611 | for (target = tb->u.generic; target; target = target->next) |
11612 | if (target_st == target->specific_st) |
11613 | { |
11614 | gfc_error ("%qs already defined as specific binding for the" |
11615 | " generic %qs at %C" , name, bind_name); |
11616 | goto error; |
11617 | } |
11618 | |
11619 | target = gfc_get_tbp_generic (); |
11620 | target->specific_st = target_st; |
11621 | target->specific = NULL; |
11622 | target->next = tb->u.generic; |
11623 | target->is_operator = ((op_type == INTERFACE_USER_OP) |
11624 | || (op_type == INTERFACE_INTRINSIC_OP)); |
11625 | tb->u.generic = target; |
11626 | } |
11627 | while (gfc_match (" ," ) == MATCH_YES); |
11628 | |
11629 | /* Here should be the end. */ |
11630 | if (gfc_match_eos () != MATCH_YES) |
11631 | { |
11632 | gfc_error ("Junk after GENERIC binding at %C" ); |
11633 | goto error; |
11634 | } |
11635 | |
11636 | return MATCH_YES; |
11637 | |
11638 | error: |
11639 | return MATCH_ERROR; |
11640 | } |
11641 | |
11642 | |
11643 | /* Match a FINAL declaration inside a derived type. */ |
11644 | |
11645 | match |
11646 | gfc_match_final_decl (void) |
11647 | { |
11648 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
11649 | gfc_symbol* sym; |
11650 | match m; |
11651 | gfc_namespace* module_ns; |
11652 | bool first, last; |
11653 | gfc_symbol* block; |
11654 | |
11655 | if (gfc_current_form == FORM_FREE) |
11656 | { |
11657 | char c = gfc_peek_ascii_char (); |
11658 | if (!gfc_is_whitespace (c) && c != ':') |
11659 | return MATCH_NO; |
11660 | } |
11661 | |
11662 | if (gfc_state_stack->state != COMP_DERIVED_CONTAINS) |
11663 | { |
11664 | if (gfc_current_form == FORM_FIXED) |
11665 | return MATCH_NO; |
11666 | |
11667 | gfc_error ("FINAL declaration at %C must be inside a derived type " |
11668 | "CONTAINS section" ); |
11669 | return MATCH_ERROR; |
11670 | } |
11671 | |
11672 | block = gfc_state_stack->previous->sym; |
11673 | gcc_assert (block); |
11674 | |
11675 | if (gfc_state_stack->previous->previous |
11676 | && gfc_state_stack->previous->previous->state != COMP_MODULE |
11677 | && gfc_state_stack->previous->previous->state != COMP_SUBMODULE) |
11678 | { |
11679 | gfc_error ("Derived type declaration with FINAL at %C must be in the" |
11680 | " specification part of a MODULE" ); |
11681 | return MATCH_ERROR; |
11682 | } |
11683 | |
11684 | module_ns = gfc_current_ns; |
11685 | gcc_assert (module_ns); |
11686 | gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE); |
11687 | |
11688 | /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */ |
11689 | if (gfc_match (" ::" ) == MATCH_ERROR) |
11690 | return MATCH_ERROR; |
11691 | |
11692 | /* Match the sequence of procedure names. */ |
11693 | first = true; |
11694 | last = false; |
11695 | do |
11696 | { |
11697 | gfc_finalizer* f; |
11698 | |
11699 | if (first && gfc_match_eos () == MATCH_YES) |
11700 | { |
11701 | gfc_error ("Empty FINAL at %C" ); |
11702 | return MATCH_ERROR; |
11703 | } |
11704 | |
11705 | m = gfc_match_name (name); |
11706 | if (m == MATCH_NO) |
11707 | { |
11708 | gfc_error ("Expected module procedure name at %C" ); |
11709 | return MATCH_ERROR; |
11710 | } |
11711 | else if (m != MATCH_YES) |
11712 | return MATCH_ERROR; |
11713 | |
11714 | if (gfc_match_eos () == MATCH_YES) |
11715 | last = true; |
11716 | if (!last && gfc_match_char (',') != MATCH_YES) |
11717 | { |
11718 | gfc_error ("Expected %<,%> at %C" ); |
11719 | return MATCH_ERROR; |
11720 | } |
11721 | |
11722 | if (gfc_get_symbol (name, module_ns, &sym)) |
11723 | { |
11724 | gfc_error ("Unknown procedure name %qs at %C" , name); |
11725 | return MATCH_ERROR; |
11726 | } |
11727 | |
11728 | /* Mark the symbol as module procedure. */ |
11729 | if (sym->attr.proc != PROC_MODULE |
11730 | && !gfc_add_procedure (&sym->attr, PROC_MODULE, sym->name, NULL)) |
11731 | return MATCH_ERROR; |
11732 | |
11733 | /* Check if we already have this symbol in the list, this is an error. */ |
11734 | for (f = block->f2k_derived->finalizers; f; f = f->next) |
11735 | if (f->proc_sym == sym) |
11736 | { |
11737 | gfc_error ("%qs at %C is already defined as FINAL procedure" , |
11738 | name); |
11739 | return MATCH_ERROR; |
11740 | } |
11741 | |
11742 | /* Add this symbol to the list of finalizers. */ |
11743 | gcc_assert (block->f2k_derived); |
11744 | sym->refs++; |
11745 | f = XCNEW (gfc_finalizer); |
11746 | f->proc_sym = sym; |
11747 | f->proc_tree = NULL; |
11748 | f->where = gfc_current_locus; |
11749 | f->next = block->f2k_derived->finalizers; |
11750 | block->f2k_derived->finalizers = f; |
11751 | |
11752 | first = false; |
11753 | } |
11754 | while (!last); |
11755 | |
11756 | return MATCH_YES; |
11757 | } |
11758 | |
11759 | |
11760 | const ext_attr_t ext_attr_list[] = { |
11761 | { .name: "dllimport" , .id: EXT_ATTR_DLLIMPORT, .middle_end_name: "dllimport" }, |
11762 | { .name: "dllexport" , .id: EXT_ATTR_DLLEXPORT, .middle_end_name: "dllexport" }, |
11763 | { .name: "cdecl" , .id: EXT_ATTR_CDECL, .middle_end_name: "cdecl" }, |
11764 | { .name: "stdcall" , .id: EXT_ATTR_STDCALL, .middle_end_name: "stdcall" }, |
11765 | { .name: "fastcall" , .id: EXT_ATTR_FASTCALL, .middle_end_name: "fastcall" }, |
11766 | { .name: "no_arg_check" , .id: EXT_ATTR_NO_ARG_CHECK, NULL }, |
11767 | { .name: "deprecated" , .id: EXT_ATTR_DEPRECATED, NULL }, |
11768 | { .name: "noinline" , .id: EXT_ATTR_NOINLINE, NULL }, |
11769 | { .name: "noreturn" , .id: EXT_ATTR_NORETURN, NULL }, |
11770 | { .name: "weak" , .id: EXT_ATTR_WEAK, NULL }, |
11771 | { NULL, .id: EXT_ATTR_LAST, NULL } |
11772 | }; |
11773 | |
11774 | /* Match a !GCC$ ATTRIBUTES statement of the form: |
11775 | !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ... |
11776 | When we come here, we have already matched the !GCC$ ATTRIBUTES string. |
11777 | |
11778 | TODO: We should support all GCC attributes using the same syntax for |
11779 | the attribute list, i.e. the list in C |
11780 | __attributes(( attribute-list )) |
11781 | matches then |
11782 | !GCC$ ATTRIBUTES attribute-list :: |
11783 | Cf. c-parser.cc's c_parser_attributes; the data can then directly be |
11784 | saved into a TREE. |
11785 | |
11786 | As there is absolutely no risk of confusion, we should never return |
11787 | MATCH_NO. */ |
11788 | match |
11789 | gfc_match_gcc_attributes (void) |
11790 | { |
11791 | symbol_attribute attr; |
11792 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
11793 | unsigned id; |
11794 | gfc_symbol *sym; |
11795 | match m; |
11796 | |
11797 | gfc_clear_attr (&attr); |
11798 | for(;;) |
11799 | { |
11800 | char ch; |
11801 | |
11802 | if (gfc_match_name (name) != MATCH_YES) |
11803 | return MATCH_ERROR; |
11804 | |
11805 | for (id = 0; id < EXT_ATTR_LAST; id++) |
11806 | if (strcmp (s1: name, s2: ext_attr_list[id].name) == 0) |
11807 | break; |
11808 | |
11809 | if (id == EXT_ATTR_LAST) |
11810 | { |
11811 | gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C" ); |
11812 | return MATCH_ERROR; |
11813 | } |
11814 | |
11815 | if (!gfc_add_ext_attribute (&attr, (ext_attr_id_t)id, &gfc_current_locus)) |
11816 | return MATCH_ERROR; |
11817 | |
11818 | gfc_gobble_whitespace (); |
11819 | ch = gfc_next_ascii_char (); |
11820 | if (ch == ':') |
11821 | { |
11822 | /* This is the successful exit condition for the loop. */ |
11823 | if (gfc_next_ascii_char () == ':') |
11824 | break; |
11825 | } |
11826 | |
11827 | if (ch == ',') |
11828 | continue; |
11829 | |
11830 | goto syntax; |
11831 | } |
11832 | |
11833 | if (gfc_match_eos () == MATCH_YES) |
11834 | goto syntax; |
11835 | |
11836 | for(;;) |
11837 | { |
11838 | m = gfc_match_name (name); |
11839 | if (m != MATCH_YES) |
11840 | return m; |
11841 | |
11842 | if (find_special (name, result: &sym, allow_subroutine: true)) |
11843 | return MATCH_ERROR; |
11844 | |
11845 | sym->attr.ext_attr |= attr.ext_attr; |
11846 | |
11847 | if (gfc_match_eos () == MATCH_YES) |
11848 | break; |
11849 | |
11850 | if (gfc_match_char (',') != MATCH_YES) |
11851 | goto syntax; |
11852 | } |
11853 | |
11854 | return MATCH_YES; |
11855 | |
11856 | syntax: |
11857 | gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C" ); |
11858 | return MATCH_ERROR; |
11859 | } |
11860 | |
11861 | |
11862 | /* Match a !GCC$ UNROLL statement of the form: |
11863 | !GCC$ UNROLL n |
11864 | |
11865 | The parameter n is the number of times we are supposed to unroll. |
11866 | |
11867 | When we come here, we have already matched the !GCC$ UNROLL string. */ |
11868 | match |
11869 | gfc_match_gcc_unroll (void) |
11870 | { |
11871 | int value; |
11872 | |
11873 | /* FIXME: use gfc_match_small_literal_int instead, delete small_int */ |
11874 | if (gfc_match_small_int (&value) == MATCH_YES) |
11875 | { |
11876 | if (value < 0 || value > USHRT_MAX) |
11877 | { |
11878 | gfc_error ("%<GCC unroll%> directive requires a" |
11879 | " non-negative integral constant" |
11880 | " less than or equal to %u at %C" , |
11881 | USHRT_MAX |
11882 | ); |
11883 | return MATCH_ERROR; |
11884 | } |
11885 | if (gfc_match_eos () == MATCH_YES) |
11886 | { |
11887 | directive_unroll = value == 0 ? 1 : value; |
11888 | return MATCH_YES; |
11889 | } |
11890 | } |
11891 | |
11892 | gfc_error ("Syntax error in !GCC$ UNROLL directive at %C" ); |
11893 | return MATCH_ERROR; |
11894 | } |
11895 | |
11896 | /* Match a !GCC$ builtin (b) attributes simd flags if('target') form: |
11897 | |
11898 | The parameter b is name of a middle-end built-in. |
11899 | FLAGS is optional and must be one of: |
11900 | - (inbranch) |
11901 | - (notinbranch) |
11902 | |
11903 | IF('target') is optional and TARGET is a name of a multilib ABI. |
11904 | |
11905 | When we come here, we have already matched the !GCC$ builtin string. */ |
11906 | |
11907 | match |
11908 | gfc_match_gcc_builtin (void) |
11909 | { |
11910 | char builtin[GFC_MAX_SYMBOL_LEN + 1]; |
11911 | char target[GFC_MAX_SYMBOL_LEN + 1]; |
11912 | |
11913 | if (gfc_match (" ( %n ) attributes simd" , builtin) != MATCH_YES) |
11914 | return MATCH_ERROR; |
11915 | |
11916 | gfc_simd_clause clause = SIMD_NONE; |
11917 | if (gfc_match (" ( notinbranch ) " ) == MATCH_YES) |
11918 | clause = SIMD_NOTINBRANCH; |
11919 | else if (gfc_match (" ( inbranch ) " ) == MATCH_YES) |
11920 | clause = SIMD_INBRANCH; |
11921 | |
11922 | if (gfc_match (" if ( '%n' ) " , target) == MATCH_YES) |
11923 | { |
11924 | const char *abi = targetm.get_multilib_abi_name (); |
11925 | if (abi == NULL || strcmp (s1: abi, s2: target) != 0) |
11926 | return MATCH_YES; |
11927 | } |
11928 | |
11929 | if (gfc_vectorized_builtins == NULL) |
11930 | gfc_vectorized_builtins = new hash_map<nofree_string_hash, int> (); |
11931 | |
11932 | char *r = XNEWVEC (char, strlen (builtin) + 32); |
11933 | sprintf (s: r, format: "__builtin_%s" , builtin); |
11934 | |
11935 | bool existed; |
11936 | int &value = gfc_vectorized_builtins->get_or_insert (k: r, existed: &existed); |
11937 | value |= clause; |
11938 | if (existed) |
11939 | free (ptr: r); |
11940 | |
11941 | return MATCH_YES; |
11942 | } |
11943 | |
11944 | /* Match an !GCC$ IVDEP statement. |
11945 | When we come here, we have already matched the !GCC$ IVDEP string. */ |
11946 | |
11947 | match |
11948 | gfc_match_gcc_ivdep (void) |
11949 | { |
11950 | if (gfc_match_eos () == MATCH_YES) |
11951 | { |
11952 | directive_ivdep = true; |
11953 | return MATCH_YES; |
11954 | } |
11955 | |
11956 | gfc_error ("Syntax error in !GCC$ IVDEP directive at %C" ); |
11957 | return MATCH_ERROR; |
11958 | } |
11959 | |
11960 | /* Match an !GCC$ VECTOR statement. |
11961 | When we come here, we have already matched the !GCC$ VECTOR string. */ |
11962 | |
11963 | match |
11964 | gfc_match_gcc_vector (void) |
11965 | { |
11966 | if (gfc_match_eos () == MATCH_YES) |
11967 | { |
11968 | directive_vector = true; |
11969 | directive_novector = false; |
11970 | return MATCH_YES; |
11971 | } |
11972 | |
11973 | gfc_error ("Syntax error in !GCC$ VECTOR directive at %C" ); |
11974 | return MATCH_ERROR; |
11975 | } |
11976 | |
11977 | /* Match an !GCC$ NOVECTOR statement. |
11978 | When we come here, we have already matched the !GCC$ NOVECTOR string. */ |
11979 | |
11980 | match |
11981 | gfc_match_gcc_novector (void) |
11982 | { |
11983 | if (gfc_match_eos () == MATCH_YES) |
11984 | { |
11985 | directive_novector = true; |
11986 | directive_vector = false; |
11987 | return MATCH_YES; |
11988 | } |
11989 | |
11990 | gfc_error ("Syntax error in !GCC$ NOVECTOR directive at %C" ); |
11991 | return MATCH_ERROR; |
11992 | } |
11993 | |