cp-tree.h source code [gcc/cp/cp-tree.h]

1	/ Definitions for C++ parsing and type checking.*
2	Copyright (C) 1987-2017 Free Software Foundation, Inc.
3	Contributed by Michael Tiemann (tiemann@cygnus.com)
4
5	This file is part of GCC.
6
7	GCC is free software; you can redistribute it and/or modify
8	it under the terms of the GNU General Public License as published by
9	the Free Software Foundation; either version 3, or (at your option)
10	any later version.
11
12	GCC is distributed in the hope that it will be useful,
13	but WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	GNU General Public License 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	#ifndef GCC_CP_TREE_H
22	#define GCC_CP_TREE_H
23
24	#include "tm.h"
25	#include "hard-reg-set.h"
26	#include "function.h"
27
28	/ In order for the format checking to accept the C++ front end*
29	diagnostic framework extensions, you must include this file before
30	diagnostic-core.h, not after. We override the definition of GCC_DIAG_STYLE
31	in c-common.h. /*
32	#undef GCC_DIAG_STYLE
33	#define GCC_DIAG_STYLE __gcc_cxxdiag__
34	#if defined(GCC_DIAGNOSTIC_CORE_H) \|\| defined (GCC_C_COMMON_H)
35	#error \
36	In order for the format checking to accept the C++ front end diagnostic \
37	framework extensions, you must include this file before diagnostic-core.h and \
38	c-common.h, not after.
39	#endif
40	#include "c-family/c-common.h"
41	#include "diagnostic.h"
42
43	/ A tree node, together with a location, so that we can track locations*
44	(and ranges) during parsing.
45
46	The location is redundant for node kinds that have locations,
47	but not all node kinds do (e.g. constants, and references to
48	params, locals, etc), so we stash a copy here. /*
49
50	class cp_expr
51	{
52	public:
53	cp_expr () :
54	m_value (NULL), m_loc (UNKNOWN_LOCATION) {}
55
56	cp_expr (tree value) :
57	m_value (value), m_loc (EXPR_LOCATION (m_value)) {}
58
59	cp_expr (tree value, location_t loc):
60	m_value (value), m_loc (loc) {}
61
62	cp_expr (const cp_expr &other) :
63	m_value (other.m_value), m_loc (other.m_loc) {}
64
65	/ Implicit conversions to tree. /
66	operator tree () const { return m_value; }
67	tree & operator* () { return m_value; }
68	tree operator* () const { return m_value; }
69	tree & operator-> () { return m_value; }
70	tree operator-> () const { return m_value; }
71
72	tree get_value () const { return m_value; }
73	location_t get_location () const { return m_loc; }
74	location_t get_start () const
75	{
76	source_range src_range = get_range_from_loc (line_table, m_loc);
77	return src_range.m_start;
78	}
79	location_t get_finish () const
80	{
81	source_range src_range = get_range_from_loc (line_table, m_loc);
82	return src_range.m_finish;
83	}
84
85	void set_location (location_t loc)
86	{
87	protected_set_expr_location (m_value, loc);
88	m_loc = loc;
89	}
90
91	void set_range (location_t start, location_t finish)
92	{
93	set_location (make_location (m_loc, start, finish));
94	}
95
96	private:
97	tree m_value;
98	location_t m_loc;
99	};
100
101	inline bool
102	operator == (const cp_expr &lhs, tree rhs)
103	{
104	return lhs.get_value () == rhs;
105	}
106
107
108	enum cp_tree_index
109	{
110	CPTI_WCHAR_DECL,
111	CPTI_VTABLE_ENTRY_TYPE,
112	CPTI_DELTA_TYPE,
113	CPTI_VTABLE_INDEX_TYPE,
114	CPTI_CLEANUP_TYPE,
115	CPTI_VTT_PARM_TYPE,
116
117	CPTI_CLASS_TYPE,
118	CPTI_UNKNOWN_TYPE,
119	CPTI_INIT_LIST_TYPE,
120	CPTI_VTBL_TYPE,
121	CPTI_VTBL_PTR_TYPE,
122	CPTI_STD,
123	CPTI_ABI,
124	CPTI_GLOBAL,
125	CPTI_GLOBAL_TYPE,
126	CPTI_CONST_TYPE_INFO_TYPE,
127	CPTI_TYPE_INFO_PTR_TYPE,
128	CPTI_ABORT_FNDECL,
129	CPTI_AGGR_TAG,
130	CPTI_CONV_OP_MARKER,
131
132	CPTI_CTOR_IDENTIFIER,
133	CPTI_COMPLETE_CTOR_IDENTIFIER,
134	CPTI_BASE_CTOR_IDENTIFIER,
135	CPTI_DTOR_IDENTIFIER,
136	CPTI_COMPLETE_DTOR_IDENTIFIER,
137	CPTI_BASE_DTOR_IDENTIFIER,
138	CPTI_DELETING_DTOR_IDENTIFIER,
139	CPTI_CONV_OP_IDENTIFIER,
140	CPTI_DELTA_IDENTIFIER,
141	CPTI_IN_CHARGE_IDENTIFIER,
142	CPTI_VTT_PARM_IDENTIFIER,
143	CPTI_THIS_IDENTIFIER,
144	CPTI_PFN_IDENTIFIER,
145	CPTI_VPTR_IDENTIFIER,
146	CPTI_GLOBAL_IDENTIFIER,
147	CPTI_STD_IDENTIFIER,
148	CPTI_ANON_IDENTIFIER,
149	CPTI_AUTO_IDENTIFIER,
150	CPTI_DECLTYPE_AUTO_IDENTIFIER,
151	CPTI_INIT_LIST_IDENTIFIER,
152
153	CPTI_LANG_NAME_C,
154	CPTI_LANG_NAME_CPLUSPLUS,
155
156	CPTI_EMPTY_EXCEPT_SPEC,
157	CPTI_NOEXCEPT_TRUE_SPEC,
158	CPTI_NOEXCEPT_FALSE_SPEC,
159	CPTI_NOEXCEPT_DEFERRED_SPEC,
160
161	CPTI_TERMINATE_FN,
162	CPTI_CALL_UNEXPECTED_FN,
163	CPTI_GET_EXCEPTION_PTR_FN,
164	CPTI_BEGIN_CATCH_FN,
165	CPTI_END_CATCH_FN,
166	CPTI_ALLOCATE_EXCEPTION_FN,
167	CPTI_FREE_EXCEPTION_FN,
168	CPTI_THROW_FN,
169	CPTI_RETHROW_FN,
170	CPTI_ATEXIT_FN_PTR_TYPE,
171	CPTI_ATEXIT,
172	CPTI_DSO_HANDLE,
173	CPTI_DCAST,
174
175	CPTI_NULLPTR,
176	CPTI_NULLPTR_TYPE,
177
178	CPTI_ALIGN_TYPE,
179
180	CPTI_ANY_TARG,
181
182	CPTI_MAX
183	};
184
185	extern GTY(()) tree cp_global_trees[CPTI_MAX];
186
187	#define wchar_decl_node cp_global_trees[CPTI_WCHAR_DECL]
188	#define vtable_entry_type cp_global_trees[CPTI_VTABLE_ENTRY_TYPE]
189	/ The type used to represent an offset by which to adjust the `this'*
190	pointer in pointer-to-member types. /*
191	#define delta_type_node cp_global_trees[CPTI_DELTA_TYPE]
192	/ The type used to represent an index into the vtable. /
193	#define vtable_index_type cp_global_trees[CPTI_VTABLE_INDEX_TYPE]
194
195	#define class_type_node cp_global_trees[CPTI_CLASS_TYPE]
196	#define unknown_type_node cp_global_trees[CPTI_UNKNOWN_TYPE]
197	#define init_list_type_node cp_global_trees[CPTI_INIT_LIST_TYPE]
198	#define vtbl_type_node cp_global_trees[CPTI_VTBL_TYPE]
199	#define vtbl_ptr_type_node cp_global_trees[CPTI_VTBL_PTR_TYPE]
200	#define std_node cp_global_trees[CPTI_STD]
201	#define abi_node cp_global_trees[CPTI_ABI]
202	#define global_namespace cp_global_trees[CPTI_GLOBAL]
203	#define global_type_node cp_global_trees[CPTI_GLOBAL_TYPE]
204	#define const_type_info_type_node cp_global_trees[CPTI_CONST_TYPE_INFO_TYPE]
205	#define type_info_ptr_type cp_global_trees[CPTI_TYPE_INFO_PTR_TYPE]
206	#define conv_op_marker cp_global_trees[CPTI_CONV_OP_MARKER]
207	#define abort_fndecl cp_global_trees[CPTI_ABORT_FNDECL]
208	#define current_aggr cp_global_trees[CPTI_AGGR_TAG]
209	#define nullptr_node cp_global_trees[CPTI_NULLPTR]
210	#define nullptr_type_node cp_global_trees[CPTI_NULLPTR_TYPE]
211	/ std::align_val_t /
212	#define align_type_node cp_global_trees[CPTI_ALIGN_TYPE]
213
214	/ We cache these tree nodes so as to call get_identifier less frequently.*
215	For identifiers for functions, including special member functions such
216	as ctors and assignment operators, the nodes can be used (among other
217	things) to iterate over their overloads defined by/for a type. For
218	example:
219
220	tree ovlid = assign_op_identifier;
221	tree overloads = get_class_binding (type, ovlid);
222	for (ovl_iterator it (overloads); it; ++it) { ... }
223
224	iterates over the set of implicitly and explicitly defined overloads
225	of the assignment operator for type (including the copy and move
226	assignment operators, whether deleted or not). /*
227
228	/ The name of a constructor that takes an in-charge parameter to*
229	decide whether or not to construct virtual base classes. /*
230	#define ctor_identifier cp_global_trees[CPTI_CTOR_IDENTIFIER]
231	/ The name of a constructor that constructs virtual base classes. /
232	#define complete_ctor_identifier cp_global_trees[CPTI_COMPLETE_CTOR_IDENTIFIER]
233	/ The name of a constructor that does not construct virtual base classes. /
234	#define base_ctor_identifier cp_global_trees[CPTI_BASE_CTOR_IDENTIFIER]
235	/ The name of a destructor that takes an in-charge parameter to*
236	decide whether or not to destroy virtual base classes and whether
237	or not to delete the object. /*
238	#define dtor_identifier cp_global_trees[CPTI_DTOR_IDENTIFIER]
239	/ The name of a destructor that destroys virtual base classes. /
240	#define complete_dtor_identifier cp_global_trees[CPTI_COMPLETE_DTOR_IDENTIFIER]
241	/ The name of a destructor that does not destroy virtual base*
242	classes. /*
243	#define base_dtor_identifier cp_global_trees[CPTI_BASE_DTOR_IDENTIFIER]
244	/ The name of a destructor that destroys virtual base classes, and*
245	then deletes the entire object. /*
246	#define deleting_dtor_identifier cp_global_trees[CPTI_DELETING_DTOR_IDENTIFIER]
247
248	#define ovl_op_identifier(ISASS, CODE) (OVL_OP_INFO(ISASS, CODE)->identifier)
249	#define assign_op_identifier (ovl_op_info[true][OVL_OP_NOP_EXPR].identifier)
250	#define call_op_identifier (ovl_op_info[false][OVL_OP_CALL_EXPR].identifier)
251	/ The name used for conversion operators -- but note that actual*
252	conversion functions use special identifiers outside the identifier
253	table. /*
254	#define conv_op_identifier cp_global_trees[CPTI_CONV_OP_IDENTIFIER]
255
256	#define delta_identifier cp_global_trees[CPTI_DELTA_IDENTIFIER]
257	#define in_charge_identifier cp_global_trees[CPTI_IN_CHARGE_IDENTIFIER]
258	/ The name of the parameter that contains a pointer to the VTT to use*
259	for this subobject constructor or destructor. /*
260	#define vtt_parm_identifier cp_global_trees[CPTI_VTT_PARM_IDENTIFIER]
261	#define this_identifier cp_global_trees[CPTI_THIS_IDENTIFIER]
262	#define pfn_identifier cp_global_trees[CPTI_PFN_IDENTIFIER]
263	#define vptr_identifier cp_global_trees[CPTI_VPTR_IDENTIFIER]
264	/ The name of the ::, std & anon namespaces. /
265	#define global_identifier cp_global_trees[CPTI_GLOBAL_IDENTIFIER]
266	#define std_identifier cp_global_trees[CPTI_STD_IDENTIFIER]
267	#define anon_identifier cp_global_trees[CPTI_ANON_IDENTIFIER]
268	/ auto and declspec(auto) identifiers. /
269	#define auto_identifier cp_global_trees[CPTI_AUTO_IDENTIFIER]
270	#define decltype_auto_identifier cp_global_trees[CPTI_DECLTYPE_AUTO_IDENTIFIER]
271	#define init_list_identifier cp_global_trees[CPTI_INIT_LIST_IDENTIFIER]
272	#define lang_name_c cp_global_trees[CPTI_LANG_NAME_C]
273	#define lang_name_cplusplus cp_global_trees[CPTI_LANG_NAME_CPLUSPLUS]
274
275	/ Exception specifiers used for throw(), noexcept(true),*
276	noexcept(false) and deferred noexcept. We rely on these being
277	uncloned. /*
278	#define empty_except_spec cp_global_trees[CPTI_EMPTY_EXCEPT_SPEC]
279	#define noexcept_true_spec cp_global_trees[CPTI_NOEXCEPT_TRUE_SPEC]
280	#define noexcept_false_spec cp_global_trees[CPTI_NOEXCEPT_FALSE_SPEC]
281	#define noexcept_deferred_spec cp_global_trees[CPTI_NOEXCEPT_DEFERRED_SPEC]
282
283	/ Exception handling function declarations. /
284	#define terminate_fn cp_global_trees[CPTI_TERMINATE_FN]
285	#define call_unexpected_fn cp_global_trees[CPTI_CALL_UNEXPECTED_FN]
286	#define get_exception_ptr_fn cp_global_trees[CPTI_GET_EXCEPTION_PTR_FN]
287	#define begin_catch_fn cp_global_trees[CPTI_BEGIN_CATCH_FN]
288	#define end_catch_fn cp_global_trees[CPTI_END_CATCH_FN]
289	#define allocate_exception_fn cp_global_trees[CPTI_ALLOCATE_EXCEPTION_FN]
290	#define free_exception_fn cp_global_trees[CPTI_FREE_EXCEPTION_FN]
291	#define throw_fn cp_global_trees[CPTI_THROW_FN]
292	#define rethrow_fn cp_global_trees[CPTI_RETHROW_FN]
293
294	/ The type of the function-pointer argument to "__cxa_atexit" (or*
295	"std::atexit", if "__cxa_atexit" is not being used). /*
296	#define atexit_fn_ptr_type_node cp_global_trees[CPTI_ATEXIT_FN_PTR_TYPE]
297
298	/ A pointer to `std::atexit'. /
299	#define atexit_node cp_global_trees[CPTI_ATEXIT]
300
301	/ A pointer to `__dso_handle'. /
302	#define dso_handle_node cp_global_trees[CPTI_DSO_HANDLE]
303
304	/ The declaration of the dynamic_cast runtime. /
305	#define dynamic_cast_node cp_global_trees[CPTI_DCAST]
306
307	/ The type of a destructor. /
308	#define cleanup_type cp_global_trees[CPTI_CLEANUP_TYPE]
309
310	/ The type of the vtt parameter passed to subobject constructors and*
311	destructors. /*
312	#define vtt_parm_type cp_global_trees[CPTI_VTT_PARM_TYPE]
313
314	/ A node which matches any template argument. /
315	#define any_targ_node cp_global_trees[CPTI_ANY_TARG]
316
317	/ Node to indicate default access. This must be distinct from the*
318	access nodes in tree.h. /*
319
320	#define access_default_node null_node
321
322
323	#include "name-lookup.h"
324
325	/ Usage of TREE_LANG_FLAG_?:*
326	0: IDENTIFIER_KIND_BIT_0 (in IDENTIFIER_NODE)
327	NEW_EXPR_USE_GLOBAL (in NEW_EXPR).
328	COND_EXPR_IS_VEC_DELETE (in COND_EXPR).
329	DELETE_EXPR_USE_GLOBAL (in DELETE_EXPR).
330	COMPOUND_EXPR_OVERLOADED (in COMPOUND_EXPR).
331	CLEANUP_P (in TRY_BLOCK)
332	AGGR_INIT_VIA_CTOR_P (in AGGR_INIT_EXPR)
333	PTRMEM_OK_P (in ADDR_EXPR, OFFSET_REF, SCOPE_REF)
334	PAREN_STRING_LITERAL (in STRING_CST)
335	CP_DECL_THREAD_LOCAL_P (in VAR_DECL)
336	KOENIG_LOOKUP_P (in CALL_EXPR)
337	STATEMENT_LIST_NO_SCOPE (in STATEMENT_LIST).
338	EXPR_STMT_STMT_EXPR_RESULT (in EXPR_STMT)
339	STMT_EXPR_NO_SCOPE (in STMT_EXPR)
340	BIND_EXPR_TRY_BLOCK (in BIND_EXPR)
341	TYPENAME_IS_ENUM_P (in TYPENAME_TYPE)
342	OMP_FOR_GIMPLIFYING_P (in OMP_FOR, OMP_SIMD, OMP_DISTRIBUTE,
343	and OMP_TASKLOOP)
344	BASELINK_QUALIFIED_P (in BASELINK)
345	TARGET_EXPR_IMPLICIT_P (in TARGET_EXPR)
346	TEMPLATE_PARM_PARAMETER_PACK (in TEMPLATE_PARM_INDEX)
347	ATTR_IS_DEPENDENT (in the TREE_LIST for an attribute)
348	ABI_TAG_IMPLICIT (in the TREE_LIST for the argument of abi_tag)
349	CONSTRUCTOR_IS_DIRECT_INIT (in CONSTRUCTOR)
350	LAMBDA_EXPR_CAPTURES_THIS_P (in LAMBDA_EXPR)
351	DECLTYPE_FOR_LAMBDA_CAPTURE (in DECLTYPE_TYPE)
352	VEC_INIT_EXPR_IS_CONSTEXPR (in VEC_INIT_EXPR)
353	DECL_OVERRIDE_P (in FUNCTION_DECL)
354	IMPLICIT_CONV_EXPR_DIRECT_INIT (in IMPLICIT_CONV_EXPR)
355	TRANSACTION_EXPR_IS_STMT (in TRANSACTION_EXPR)
356	CONVERT_EXPR_VBASE_PATH (in CONVERT_EXPR)
357	PACK_EXPANSION_LOCAL_P (in _PACK_EXPANSION)*
358	TINFO_HAS_ACCESS_ERRORS (in TEMPLATE_INFO)
359	SIZEOF_EXPR_TYPE_P (in SIZEOF_EXPR)
360	COMPOUND_REQ_NOEXCEPT_P (in COMPOUND_REQ)
361	WILDCARD_PACK_P (in WILDCARD_DECL)
362	BLOCK_OUTER_CURLY_BRACE_P (in BLOCK)
363	FOLD_EXPR_MODOP_P (_FOLD_EXPR)*
364	IF_STMT_CONSTEXPR_P (IF_STMT)
365	TEMPLATE_TYPE_PARM_FOR_CLASS (TEMPLATE_TYPE_PARM)
366	DECL_NAMESPACE_INLINE_P (in NAMESPACE_DECL)
367	SWITCH_STMT_ALL_CASES_P (in SWITCH_STMT)
368	1: IDENTIFIER_KIND_BIT_1 (in IDENTIFIER_NODE)
369	TI_PENDING_TEMPLATE_FLAG.
370	TEMPLATE_PARMS_FOR_INLINE.
371	DELETE_EXPR_USE_VEC (in DELETE_EXPR).
372	(TREE_CALLS_NEW) (in _EXPR or _REF) (commented-out).
373	ICS_ELLIPSIS_FLAG (in _CONV)
374	DECL_INITIALIZED_P (in VAR_DECL)
375	TYPENAME_IS_CLASS_P (in TYPENAME_TYPE)
376	STMT_IS_FULL_EXPR_P (in _STMT)
377	TARGET_EXPR_LIST_INIT_P (in TARGET_EXPR)
378	LAMBDA_EXPR_MUTABLE_P (in LAMBDA_EXPR)
379	DECL_FINAL_P (in FUNCTION_DECL)
380	QUALIFIED_NAME_IS_TEMPLATE (in SCOPE_REF)
381	DECLTYPE_FOR_INIT_CAPTURE (in DECLTYPE_TYPE)
382	CONSTRUCTOR_NO_IMPLICIT_ZERO (in CONSTRUCTOR)
383	TINFO_USED_TEMPLATE_ID (in TEMPLATE_INFO)
384	PACK_EXPANSION_SIZEOF_P (in _PACK_EXPANSION)*
385	OVL_USING_P (in OVERLOAD)
386	IMPLICIT_CONV_EXPR_NONTYPE_ARG (in IMPLICIT_CONV_EXPR)
387	2: IDENTIFIER_KIND_BIT_2 (in IDENTIFIER_NODE)
388	ICS_THIS_FLAG (in _CONV)
389	DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (in VAR_DECL)
390	STATEMENT_LIST_TRY_BLOCK (in STATEMENT_LIST)
391	TYPENAME_IS_RESOLVING_P (in TYPE_NAME_TYPE)
392	TARGET_EXPR_DIRECT_INIT_P (in TARGET_EXPR)
393	FNDECL_USED_AUTO (in FUNCTION_DECL)
394	DECLTYPE_FOR_LAMBDA_PROXY (in DECLTYPE_TYPE)
395	REF_PARENTHESIZED_P (in COMPONENT_REF, INDIRECT_REF, SCOPE_REF)
396	AGGR_INIT_ZERO_FIRST (in AGGR_INIT_EXPR)
397	CONSTRUCTOR_MUTABLE_POISON (in CONSTRUCTOR)
398	OVL_HIDDEN_P (in OVERLOAD)
399	SWITCH_STMT_NO_BREAK_P (in SWITCH_STMT)
400	3: (TREE_REFERENCE_EXPR) (in NON_LVALUE_EXPR) (commented-out).
401	ICS_BAD_FLAG (in _CONV)
402	FN_TRY_BLOCK_P (in TRY_BLOCK)
403	BIND_EXPR_BODY_BLOCK (in BIND_EXPR)
404	DECL_NON_TRIVIALLY_INITIALIZED_P (in VAR_DECL)
405	CALL_EXPR_ORDERED_ARGS (in CALL_EXPR, AGGR_INIT_EXPR)
406	DECLTYPE_FOR_REF_CAPTURE (in DECLTYPE_TYPE)
407	CONSTUCTOR_C99_COMPOUND_LITERAL (in CONSTRUCTOR)
408	OVL_NESTED_P (in OVERLOAD)
409	4: IDENTIFIER_MARKED (IDENTIFIER_NODEs)
410	TREE_HAS_CONSTRUCTOR (in INDIRECT_REF, SAVE_EXPR, CONSTRUCTOR,
411	CALL_EXPR, or FIELD_DECL).
412	DECL_TINFO_P (in VAR_DECL)
413	FUNCTION_REF_QUALIFIED (in FUNCTION_TYPE, METHOD_TYPE)
414	OVL_LOOKUP_P (in OVERLOAD)
415	LOOKUP_FOUND_P (in RECORD_TYPE, UNION_TYPE, NAMESPACE_DECL)
416	5: IDENTIFIER_VIRTUAL_P (in IDENTIFIER_NODE)
417	DECL_VTABLE_OR_VTT_P (in VAR_DECL)
418	FUNCTION_RVALUE_QUALIFIED (in FUNCTION_TYPE, METHOD_TYPE)
419	CALL_EXPR_REVERSE_ARGS (in CALL_EXPR, AGGR_INIT_EXPR)
420	6: IDENTIFIER_REPO_CHOSEN (in IDENTIFIER_NODE)
421	DECL_CONSTRUCTION_VTABLE_P (in VAR_DECL)
422	TYPE_MARKED_P (in _TYPE)
423	RANGE_FOR_IVDEP (in RANGE_FOR_STMT)
424	CALL_EXPR_OPERATOR_SYNTAX (in CALL_EXPR, AGGR_INIT_EXPR)
425
426	Usage of TYPE_LANG_FLAG_?:
427	0: TYPE_DEPENDENT_P
428	1: TYPE_HAS_USER_CONSTRUCTOR.
429	2: TYPE_HAS_LATE_RETURN_TYPE (in FUNCTION_TYPE, METHOD_TYPE)
430	TYPE_PTRMEMFUNC_FLAG (in RECORD_TYPE)
431	4: TYPE_HAS_NONTRIVIAL_DESTRUCTOR
432	5: CLASS_TYPE_P (in RECORD_TYPE and UNION_TYPE)
433	ENUM_FIXED_UNDERLYING_TYPE_P (in ENUMERAL_TYPE)
434	AUTO_IS_DECLTYPE (in TEMPLATE_TYPE_PARM)
435	REFERENCE_VLA_OK (in REFERENCE_TYPE)
436	6: TYPE_DEPENDENT_P_VALID
437
438	Usage of DECL_LANG_FLAG_?:
439	0: DECL_ERROR_REPORTED (in VAR_DECL).
440	DECL_TEMPLATE_PARM_P (in PARM_DECL, CONST_DECL, TYPE_DECL, or TEMPLATE_DECL)
441	DECL_LOCAL_FUNCTION_P (in FUNCTION_DECL)
442	DECL_MUTABLE_P (in FIELD_DECL)
443	DECL_DEPENDENT_P (in USING_DECL)
444	LABEL_DECL_BREAK (in LABEL_DECL)
445	1: C_TYPEDEF_EXPLICITLY_SIGNED (in TYPE_DECL).
446	DECL_TEMPLATE_INSTANTIATED (in a VAR_DECL or a FUNCTION_DECL)
447	DECL_MEMBER_TEMPLATE_P (in TEMPLATE_DECL)
448	USING_DECL_TYPENAME_P (in USING_DECL)
449	DECL_VLA_CAPTURE_P (in FIELD_DECL)
450	DECL_ARRAY_PARAMETER_P (in PARM_DECL)
451	LABEL_DECL_CONTINUE (in LABEL_DECL)
452	2: DECL_THIS_EXTERN (in VAR_DECL or FUNCTION_DECL).
453	DECL_IMPLICIT_TYPEDEF_P (in a TYPE_DECL)
454	DECL_CONSTRAINT_VAR_P (in a PARM_DECL)
455	TEMPLATE_DECL_COMPLEX_ALIAS_P (in TEMPLATE_DECL)
456	DECL_INSTANTIATING_NSDMI_P (in a FIELD_DECL)
457	LABEL_DECL_CDTOR (in LABEL_DECL)
458	3: DECL_IN_AGGR_P.
459	4: DECL_C_BIT_FIELD (in a FIELD_DECL)
460	DECL_ANON_UNION_VAR_P (in a VAR_DECL)
461	DECL_SELF_REFERENCE_P (in a TYPE_DECL)
462	DECL_INVALID_OVERRIDER_P (in a FUNCTION_DECL)
463	5: DECL_INTERFACE_KNOWN.
464	6: DECL_THIS_STATIC (in VAR_DECL or FUNCTION_DECL).
465	DECL_FIELD_IS_BASE (in FIELD_DECL)
466	TYPE_DECL_ALIAS_P (in TYPE_DECL)
467	7: DECL_DEAD_FOR_LOCAL (in VAR_DECL).
468	DECL_THUNK_P (in a member FUNCTION_DECL)
469	DECL_NORMAL_CAPTURE_P (in FIELD_DECL)
470	8: DECL_DECLARED_CONSTEXPR_P (in VAR_DECL, FUNCTION_DECL)
471
472	Usage of language-independent fields in a language-dependent manner:
473
474	TYPE_ALIAS_SET
475	This field is used by TYPENAME_TYPEs, TEMPLATE_TYPE_PARMs, and so
476	forth as a substitute for the mark bits provided in `lang_type'.
477	At present, only the six low-order bits are used.
478
479	TYPE_LANG_SLOT_1
480	For a FUNCTION_TYPE or METHOD_TYPE, this is TYPE_RAISES_EXCEPTIONS.
481	For a POINTER_TYPE (to a METHOD_TYPE), this is TYPE_PTRMEMFUNC_TYPE.
482	For an ENUMERAL_TYPE, BOUND_TEMPLATE_TEMPLATE_PARM_TYPE,
483	RECORD_TYPE or UNION_TYPE this is TYPE_TEMPLATE_INFO,
484
485	BINFO_VIRTUALS
486	For a binfo, this is a TREE_LIST. There is an entry for each
487	virtual function declared either in BINFO or its direct and
488	indirect primary bases.
489
490	The BV_DELTA of each node gives the amount by which to adjust the
491	`this' pointer when calling the function. If the method is an
492	overridden version of a base class method, then it is assumed
493	that, prior to adjustment, the this pointer points to an object
494	of the base class.
495
496	The BV_VCALL_INDEX of each node, if non-NULL, gives the vtable
497	index of the vcall offset for this entry.
498
499	The BV_FN is the declaration for the virtual function itself.
500
501	If BV_LOST_PRIMARY is set, it means that this entry is for a lost
502	primary virtual base and can be left null in the vtable.
503
504	BINFO_VTABLE
505	This is an expression with POINTER_TYPE that gives the value
506	to which the vptr should be initialized. Use get_vtbl_decl_for_binfo
507	to extract the VAR_DECL for the complete vtable.
508
509	DECL_VINDEX
510	This field is NULL for a non-virtual function. For a virtual
511	function, it is eventually set to an INTEGER_CST indicating the
512	index in the vtable at which this function can be found. When
513	a virtual function is declared, but before it is known what
514	function is overridden, this field is the error_mark_node.
515
516	Temporarily, it may be set to a TREE_LIST whose TREE_VALUE is
517	the virtual function this one overrides, and whose TREE_CHAIN is
518	the old DECL_VINDEX. /*
519
520	/ Language-specific tree checkers. /
521
522	#define VAR_OR_FUNCTION_DECL_CHECK(NODE) \
523	TREE_CHECK2(NODE,VAR_DECL,FUNCTION_DECL)
524
525	#define TYPE_FUNCTION_OR_TEMPLATE_DECL_CHECK(NODE) \
526	TREE_CHECK3(NODE,TYPE_DECL,TEMPLATE_DECL,FUNCTION_DECL)
527
528	#define TYPE_FUNCTION_OR_TEMPLATE_DECL_P(NODE) \
529	(TREE_CODE (NODE) == TYPE_DECL \|\| TREE_CODE (NODE) == TEMPLATE_DECL \
530	\|\| TREE_CODE (NODE) == FUNCTION_DECL)
531
532	#define VAR_FUNCTION_OR_PARM_DECL_CHECK(NODE) \
533	TREE_CHECK3(NODE,VAR_DECL,FUNCTION_DECL,PARM_DECL)
534
535	#define VAR_TEMPL_TYPE_OR_FUNCTION_DECL_CHECK(NODE) \
536	TREE_CHECK4(NODE,VAR_DECL,FUNCTION_DECL,TYPE_DECL,TEMPLATE_DECL)
537
538	#define VAR_TEMPL_TYPE_FIELD_OR_FUNCTION_DECL_CHECK(NODE) \
539	TREE_CHECK5(NODE,VAR_DECL,FIELD_DECL,FUNCTION_DECL,TYPE_DECL,TEMPLATE_DECL)
540
541	#define BOUND_TEMPLATE_TEMPLATE_PARM_TYPE_CHECK(NODE) \
542	TREE_CHECK(NODE,BOUND_TEMPLATE_TEMPLATE_PARM)
543
544	#if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007)
545	#define THUNK_FUNCTION_CHECK(NODE) __extension__ \
546	({ __typeof (NODE) const __t = (NODE); \
547	if (TREE_CODE (__t) != FUNCTION_DECL \|\| !__t->decl_common.lang_specific \
548	\|\| !__t->decl_common.lang_specific->u.fn.thunk_p) \
549	tree_check_failed (__t, __FILE__, __LINE__, __FUNCTION__, 0); \
550	__t; })
551	#else
552	#define THUNK_FUNCTION_CHECK(NODE) (NODE)
553	#endif
554
555	/ Language-dependent contents of an identifier. /
556
557	struct GTY(()) lang_identifier {
558	struct c_common_identifier c_common;
559	cxx_binding *bindings;
560	};
561
562	/ Return a typed pointer version of T if it designates a*
563	C++ front-end identifier. /*
564	inline lang_identifier*
565	identifier_p (tree t)
566	{
567	if (TREE_CODE (t) == IDENTIFIER_NODE)
568	return (lang_identifier*) t;
569	return NULL;
570	}
571
572	#define LANG_IDENTIFIER_CAST(NODE) \
573	((struct lang_identifier*)IDENTIFIER_NODE_CHECK (NODE))
574
575	struct GTY(()) template_parm_index {
576	struct tree_common common;
577	int index;
578	int level;
579	int orig_level;
580	tree decl;
581	};
582
583	struct GTY(()) ptrmem_cst {
584	struct tree_common common;
585	tree member;
586	};
587	typedef struct ptrmem_cst * ptrmem_cst_t;
588
589	#define CLEANUP_P(NODE) TREE_LANG_FLAG_0 (TRY_BLOCK_CHECK (NODE))
590
591	#define BIND_EXPR_TRY_BLOCK(NODE) \
592	TREE_LANG_FLAG_0 (BIND_EXPR_CHECK (NODE))
593
594	/ Used to mark the block around the member initializers and cleanups. /
595	#define BIND_EXPR_BODY_BLOCK(NODE) \
596	TREE_LANG_FLAG_3 (BIND_EXPR_CHECK (NODE))
597	#define FUNCTION_NEEDS_BODY_BLOCK(NODE) \
598	(DECL_CONSTRUCTOR_P (NODE) \|\| DECL_DESTRUCTOR_P (NODE) \
599	\|\| LAMBDA_FUNCTION_P (NODE))
600
601	#define STATEMENT_LIST_NO_SCOPE(NODE) \
602	TREE_LANG_FLAG_0 (STATEMENT_LIST_CHECK (NODE))
603	#define STATEMENT_LIST_TRY_BLOCK(NODE) \
604	TREE_LANG_FLAG_2 (STATEMENT_LIST_CHECK (NODE))
605
606	/ Mark the outer curly brace BLOCK. /
607	#define BLOCK_OUTER_CURLY_BRACE_P(NODE) TREE_LANG_FLAG_0 (BLOCK_CHECK (NODE))
608
609	/ Nonzero if this statement should be considered a full-expression,*
610	i.e., if temporaries created during this statement should have
611	their destructors run at the end of this statement. /*
612	#define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
613
614	/ Marks the result of a statement expression. /
615	#define EXPR_STMT_STMT_EXPR_RESULT(NODE) \
616	TREE_LANG_FLAG_0 (EXPR_STMT_CHECK (NODE))
617
618	/ Nonzero if this statement-expression does not have an associated scope. /
619	#define STMT_EXPR_NO_SCOPE(NODE) \
620	TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
621
622	#define COND_EXPR_IS_VEC_DELETE(NODE) \
623	TREE_LANG_FLAG_0 (COND_EXPR_CHECK (NODE))
624
625	/ Returns nonzero iff TYPE1 and TYPE2 are the same type, in the usual*
626	sense of `same'. /*
627	#define same_type_p(TYPE1, TYPE2) \
628	comptypes ((TYPE1), (TYPE2), COMPARE_STRICT)
629
630	/ Returns nonzero iff NODE is a declaration for the global function*
631	`main'. /*
632	#define DECL_MAIN_P(NODE) \
633	(DECL_EXTERN_C_FUNCTION_P (NODE) \
634	&& DECL_NAME (NODE) != NULL_TREE \
635	&& MAIN_NAME_P (DECL_NAME (NODE)) \
636	&& flag_hosted)
637
638	/ Lookup walker marking. /
639	#define LOOKUP_SEEN_P(NODE) TREE_VISITED(NODE)
640	#define LOOKUP_FOUND_P(NODE) \
641	TREE_LANG_FLAG_4 (TREE_CHECK3(NODE,RECORD_TYPE,UNION_TYPE,NAMESPACE_DECL))
642
643	/ These two accessors should only be used by OVL manipulators.*
644	Other users should use iterators and convenience functions. /*
645	#define OVL_FUNCTION(NODE) \
646	(((struct tree_overload*)OVERLOAD_CHECK (NODE))->function)
647	#define OVL_CHAIN(NODE) \
648	(((struct tree_overload*)OVERLOAD_CHECK (NODE))->common.chain)
649
650	/ If set, this was imported in a using declaration. /
651	#define OVL_USING_P(NODE) TREE_LANG_FLAG_1 (OVERLOAD_CHECK (NODE))
652	/ If set, this overload is a hidden decl. /
653	#define OVL_HIDDEN_P(NODE) TREE_LANG_FLAG_2 (OVERLOAD_CHECK (NODE))
654	/ If set, this overload contains a nested overload. /
655	#define OVL_NESTED_P(NODE) TREE_LANG_FLAG_3 (OVERLOAD_CHECK (NODE))
656	/ If set, this overload was constructed during lookup. /
657	#define OVL_LOOKUP_P(NODE) TREE_LANG_FLAG_4 (OVERLOAD_CHECK (NODE))
658	/ If set, this is a persistant lookup. /
659	#define OVL_USED_P(NODE) TREE_USED (OVERLOAD_CHECK (NODE))
660
661	/ The first decl of an overload. /
662	#define OVL_FIRST(NODE) ovl_first (NODE)
663	/ The name of the overload set. /
664	#define OVL_NAME(NODE) DECL_NAME (OVL_FIRST (NODE))
665
666	/ Whether this is a set of overloaded functions. TEMPLATE_DECLS are*
667	always wrapped in an OVERLOAD, so we don't need to check them
668	here. /*
669	#define OVL_P(NODE) \
670	(TREE_CODE (NODE) == FUNCTION_DECL \|\| TREE_CODE (NODE) == OVERLOAD)
671	/ Whether this is a single member overload. /
672	#define OVL_SINGLE_P(NODE) \
673	(TREE_CODE (NODE) != OVERLOAD \|\| !OVL_CHAIN (NODE))
674
675	/ OVL_HIDDEN_P nodes come first, then OVL_USING_P nodes, then regular*
676	fns. /*
677
678	struct GTY(()) tree_overload {
679	struct tree_common common;
680	tree function;
681	};
682
683	/ Iterator for a 1 dimensional overload. Permits iterating over the*
684	outer level of a 2-d overload when explicitly enabled. /*
685
686	class ovl_iterator
687	{
688	tree ovl;
689	const bool allow_inner; / Only used when checking. /
690
691	public:
692	explicit ovl_iterator (tree o, bool allow = false)
693	: ovl (o), allow_inner (allow)
694	{
695	}
696
697	private:
698	/ Do not duplicate. /
699	ovl_iterator &operator= (const ovl_iterator &);
700	ovl_iterator (const ovl_iterator &);
701
702	public:
703	operator bool () const
704	{
705	return ovl;
706	}
707	ovl_iterator &operator++ ()
708	{
709	ovl = TREE_CODE (ovl) != OVERLOAD ? NULL_TREE : OVL_CHAIN (ovl);
710	return *this;
711	}
712	tree operator* () const
713	{
714	tree fn = TREE_CODE (ovl) != OVERLOAD ? ovl : OVL_FUNCTION (ovl);
715
716	/ Check this is not an unexpected 2-dimensional overload. /
717	gcc_checking_assert (allow_inner \|\| TREE_CODE (fn) != OVERLOAD);
718
719	return fn;
720	}
721
722	public:
723	/ Whether this overload was introduced by a using decl. /
724	bool using_p () const
725	{
726	return TREE_CODE (ovl) == OVERLOAD && OVL_USING_P (ovl);
727	}
728	bool hidden_p () const
729	{
730	return TREE_CODE (ovl) == OVERLOAD && OVL_HIDDEN_P (ovl);
731	}
732
733	public:
734	tree remove_node (tree head)
735	{
736	return remove_node (head, ovl);
737	}
738	tree reveal_node (tree head)
739	{
740	return reveal_node (head, ovl);
741	}
742
743	protected:
744	/ If we have a nested overload, point at the inner overload and*
745	return the next link on the outer one. /*
746	tree maybe_push ()
747	{
748	tree r = NULL_TREE;
749
750	if (ovl && TREE_CODE (ovl) == OVERLOAD && OVL_NESTED_P (ovl))
751	{
752	r = OVL_CHAIN (ovl);
753	ovl = OVL_FUNCTION (ovl);
754	}
755	return r;
756	}
757	/ Restore an outer nested overload. /
758	void pop (tree outer)
759	{
760	gcc_checking_assert (!ovl);
761	ovl = outer;
762	}
763
764	private:
765	/ We make these static functions to avoid the address of the*
766	iterator escaping the local context. /*
767	static tree remove_node (tree head, tree node);
768	static tree reveal_node (tree ovl, tree node);
769	};
770
771	/ Iterator over a (potentially) 2 dimensional overload, which is*
772	produced by name lookup. /*
773
774	class lkp_iterator : public ovl_iterator
775	{
776	typedef ovl_iterator parent;
777
778	tree outer;
779
780	public:
781	explicit lkp_iterator (tree o)
782	: parent (o, true), outer (maybe_push ())
783	{
784	}
785
786	public:
787	lkp_iterator &operator++ ()
788	{
789	bool repush = !outer;
790
791	if (!parent::operator++ () && !repush)
792	{
793	pop (outer);
794	repush = true;
795	}
796
797	if (repush)
798	outer = maybe_push ();
799
800	return *this;
801	}
802	};
803
804	/ hash traits for declarations. Hashes potential overload sets via*
805	DECL_NAME. /*
806
807	struct named_decl_hash : ggc_remove <tree>
808	{
809	typedef tree value_type; / A DECL or OVERLOAD /
810	typedef tree compare_type; / An identifier. /
811
812	inline static hashval_t hash (const value_type decl);
813	inline static bool equal (const value_type existing, compare_type candidate);
814
815	static inline void mark_empty (value_type &p) {p = NULL_TREE;}
816	static inline bool is_empty (value_type p) {return !p;}
817
818	/ Nothing is deletable. Everything is insertable. /
819	static bool is_deleted (value_type) { return false; }
820	static void mark_deleted (value_type) { gcc_unreachable (); }
821	};
822
823	struct GTY(()) tree_template_decl {
824	struct tree_decl_common common;
825	tree arguments;
826	tree result;
827	};
828
829	/ Returns true iff NODE is a BASELINK. /
830	#define BASELINK_P(NODE) \
831	(TREE_CODE (NODE) == BASELINK)
832	/ The BINFO indicating the base in which lookup found the*
833	BASELINK_FUNCTIONS. /*
834	#define BASELINK_BINFO(NODE) \
835	(((struct tree_baselink*) BASELINK_CHECK (NODE))->binfo)
836	/ The functions referred to by the BASELINK; either a FUNCTION_DECL,*
837	a TEMPLATE_DECL, an OVERLOAD, or a TEMPLATE_ID_EXPR. /*
838	#define BASELINK_FUNCTIONS(NODE) \
839	(((struct tree_baselink*) BASELINK_CHECK (NODE))->functions)
840	/ If T is a BASELINK, grab the functions, otherwise just T, which is*
841	expected to already be a (list of) functions. /*
842	#define MAYBE_BASELINK_FUNCTIONS(T) \
843	(BASELINK_P (T) ? BASELINK_FUNCTIONS (T) : T)
844	/ The BINFO in which the search for the functions indicated by this baselink*
845	began. This base is used to determine the accessibility of functions
846	selected by overload resolution. /*
847	#define BASELINK_ACCESS_BINFO(NODE) \
848	(((struct tree_baselink*) BASELINK_CHECK (NODE))->access_binfo)
849	/ For a type-conversion operator, the BASELINK_OPTYPE indicates the type*
850	to which the conversion should occur. This value is important if
851	the BASELINK_FUNCTIONS include a template conversion operator --
852	the BASELINK_OPTYPE can be used to determine what type the user
853	requested. /*
854	#define BASELINK_OPTYPE(NODE) \
855	(TREE_CHAIN (BASELINK_CHECK (NODE)))
856	/ Nonzero if this baselink was from a qualified lookup. /
857	#define BASELINK_QUALIFIED_P(NODE) \
858	TREE_LANG_FLAG_0 (BASELINK_CHECK (NODE))
859
860	struct GTY(()) tree_baselink {
861	struct tree_common common;
862	tree binfo;
863	tree functions;
864	tree access_binfo;
865	};
866
867	/ The different kinds of ids that we encounter. /
868
869	enum cp_id_kind
870	{
871	/ Not an id at all. /
872	CP_ID_KIND_NONE,
873	/ An unqualified-id that is not a template-id. /
874	CP_ID_KIND_UNQUALIFIED,
875	/ An unqualified-id that is a dependent name. /
876	CP_ID_KIND_UNQUALIFIED_DEPENDENT,
877	/ An unqualified template-id. /
878	CP_ID_KIND_TEMPLATE_ID,
879	/ A qualified-id. /
880	CP_ID_KIND_QUALIFIED
881	};
882
883
884	/ The various kinds of C++0x warnings we encounter. /
885
886	enum cpp0x_warn_str
887	{
888	/ extended initializer lists /
889	CPP0X_INITIALIZER_LISTS,
890	/ explicit conversion operators /
891	CPP0X_EXPLICIT_CONVERSION,
892	/ variadic templates /
893	CPP0X_VARIADIC_TEMPLATES,
894	/ lambda expressions /
895	CPP0X_LAMBDA_EXPR,
896	/ C++0x auto /
897	CPP0X_AUTO,
898	/ scoped enums /
899	CPP0X_SCOPED_ENUMS,
900	/ defaulted and deleted functions /
901	CPP0X_DEFAULTED_DELETED,
902	/ inline namespaces /
903	CPP0X_INLINE_NAMESPACES,
904	/ override controls, override/final /
905	CPP0X_OVERRIDE_CONTROLS,
906	/ non-static data member initializers /
907	CPP0X_NSDMI,
908	/ user defined literals /
909	CPP0X_USER_DEFINED_LITERALS,
910	/ delegating constructors /
911	CPP0X_DELEGATING_CTORS,
912	/ inheriting constructors /
913	CPP0X_INHERITING_CTORS,
914	/ C++11 attributes /
915	CPP0X_ATTRIBUTES,
916	/ ref-qualified member functions /
917	CPP0X_REF_QUALIFIER
918	};
919
920	/ The various kinds of operation used by composite_pointer_type. /
921
922	enum composite_pointer_operation
923	{
924	/ comparison /
925	CPO_COMPARISON,
926	/ conversion /
927	CPO_CONVERSION,
928	/ conditional expression /
929	CPO_CONDITIONAL_EXPR
930	};
931
932	/ Possible cases of expression list used by build_x_compound_expr_from_list. /
933	enum expr_list_kind {
934	ELK_INIT, / initializer /
935	ELK_MEM_INIT, / member initializer /
936	ELK_FUNC_CAST / functional cast /
937	};
938
939	/ Possible cases of implicit bad rhs conversions. /
940	enum impl_conv_rhs {
941	ICR_DEFAULT_ARGUMENT, / default argument /
942	ICR_CONVERTING, / converting /
943	ICR_INIT, / initialization /
944	ICR_ARGPASS, / argument passing /
945	ICR_RETURN, / return /
946	ICR_ASSIGN / assignment /
947	};
948
949	/ Possible cases of implicit or explicit bad conversions to void. /
950	enum impl_conv_void {
951	ICV_CAST, / (explicit) conversion to void /
952	ICV_SECOND_OF_COND, / second operand of conditional expression /
953	ICV_THIRD_OF_COND, / third operand of conditional expression /
954	ICV_RIGHT_OF_COMMA, / right operand of comma operator /
955	ICV_LEFT_OF_COMMA, / left operand of comma operator /
956	ICV_STATEMENT, / statement /
957	ICV_THIRD_IN_FOR / for increment expression /
958	};
959
960	/ Possible invalid uses of an abstract class that might not have a*
961	specific associated declaration. /*
962	enum GTY(()) abstract_class_use {
963	ACU_UNKNOWN, / unknown or decl provided /
964	ACU_CAST, / cast to abstract class /
965	ACU_NEW, / new-expression of abstract class /
966	ACU_THROW, / throw-expression of abstract class /
967	ACU_CATCH, / catch-parameter of abstract class /
968	ACU_ARRAY, / array of abstract class /
969	ACU_RETURN, / return type of abstract class /
970	ACU_PARM / parameter type of abstract class /
971	};
972
973	/ Macros for access to language-specific slots in an identifier. /
974
975	/ The IDENTIFIER_BINDING is the innermost cxx_binding for the*
976	identifier. Its PREVIOUS is the next outermost binding. Each
977	VALUE field is a DECL for the associated declaration. Thus,
978	name lookup consists simply of pulling off the node at the front
979	of the list (modulo oddities for looking up the names of types,
980	and such.) You can use SCOPE field to determine the scope
981	that bound the name. /*
982	#define IDENTIFIER_BINDING(NODE) \
983	(LANG_IDENTIFIER_CAST (NODE)->bindings)
984
985	/ TREE_TYPE only indicates on local and class scope the current*
986	type. For namespace scope, the presence of a type in any namespace
987	is indicated with global_type_node, and the real type behind must
988	be found through lookup. /*
989	#define IDENTIFIER_TYPE_VALUE(NODE) identifier_type_value (NODE)
990	#define REAL_IDENTIFIER_TYPE_VALUE(NODE) TREE_TYPE (NODE)
991	#define SET_IDENTIFIER_TYPE_VALUE(NODE,TYPE) (TREE_TYPE (NODE) = (TYPE))
992	#define IDENTIFIER_HAS_TYPE_VALUE(NODE) (IDENTIFIER_TYPE_VALUE (NODE) ? 1 : 0)
993
994	/ Kinds of identifiers. Values are carefully chosen. /
995	enum cp_identifier_kind {
996	cik_normal = `0`, / Not a special identifier. /
997	cik_keyword = `1`, / A keyword. /
998	cik_ctor = `2`, / Constructor (in-chg, complete or base). /
999	cik_dtor = `3`, / Destructor (in-chg, deleting, complete or*
1000	base). /*
1001	cik_simple_op = `4`, / Non-assignment operator name. /
1002	cik_assign_op = `5`, / An assignment operator name. /
1003	cik_conv_op = `6`, / Conversion operator name. /
1004	cik_reserved_for_udlit = `7`, / Not yet in use /
1005	cik_max
1006	};
1007
1008	/ Kind bits. /
1009	#define IDENTIFIER_KIND_BIT_0(NODE) \
1010	TREE_LANG_FLAG_0 (IDENTIFIER_NODE_CHECK (NODE))
1011	#define IDENTIFIER_KIND_BIT_1(NODE) \
1012	TREE_LANG_FLAG_1 (IDENTIFIER_NODE_CHECK (NODE))
1013	#define IDENTIFIER_KIND_BIT_2(NODE) \
1014	TREE_LANG_FLAG_2 (IDENTIFIER_NODE_CHECK (NODE))
1015
1016	/ Used by various search routines. /
1017	#define IDENTIFIER_MARKED(NODE) \
1018	TREE_LANG_FLAG_4 (IDENTIFIER_NODE_CHECK (NODE))
1019
1020	/ Nonzero if this identifier is used as a virtual function name somewhere*
1021	(optimizes searches). /*
1022	#define IDENTIFIER_VIRTUAL_P(NODE) \
1023	TREE_LANG_FLAG_5 (IDENTIFIER_NODE_CHECK (NODE))
1024
1025	/ True iff NAME is the DECL_ASSEMBLER_NAME for an entity with vague*
1026	linkage which the prelinker has assigned to this translation
1027	unit. /*
1028	#define IDENTIFIER_REPO_CHOSEN(NAME) \
1029	(TREE_LANG_FLAG_6 (IDENTIFIER_NODE_CHECK (NAME)))
1030
1031	/ True if this identifier is a reserved word. C_RID_CODE (node) is*
1032	then the RID_ value of the keyword. Value 1. /
1033	#define IDENTIFIER_KEYWORD_P(NODE) \
1034	((!IDENTIFIER_KIND_BIT_2 (NODE)) \
1035	& (!IDENTIFIER_KIND_BIT_1 (NODE)) \
1036	& IDENTIFIER_KIND_BIT_0 (NODE))
1037
1038	/ True if this identifier is the name of a constructor or*
1039	destructor. Value 2 or 3. /*
1040	#define IDENTIFIER_CDTOR_P(NODE) \
1041	((!IDENTIFIER_KIND_BIT_2 (NODE)) \
1042	& IDENTIFIER_KIND_BIT_1 (NODE))
1043
1044	/ True if this identifier is the name of a constructor. Value 2. /
1045	#define IDENTIFIER_CTOR_P(NODE) \
1046	(IDENTIFIER_CDTOR_P(NODE) \
1047	& (!IDENTIFIER_KIND_BIT_0 (NODE)))
1048
1049	/ True if this identifier is the name of a destructor. Value 3. /
1050	#define IDENTIFIER_DTOR_P(NODE) \
1051	(IDENTIFIER_CDTOR_P(NODE) \
1052	& IDENTIFIER_KIND_BIT_0 (NODE))
1053
1054	/ True if this identifier is for any operator name (including*
1055	conversions). Value 4, 5, 6 or 7. /*
1056	#define IDENTIFIER_ANY_OP_P(NODE) \
1057	(IDENTIFIER_KIND_BIT_2 (NODE))
1058
1059	/ True if this identifier is for an overloaded operator. Values 4, 5. /
1060	#define IDENTIFIER_OVL_OP_P(NODE) \
1061	(IDENTIFIER_ANY_OP_P (NODE) \
1062	& (!IDENTIFIER_KIND_BIT_1 (NODE)))
1063
1064	/ True if this identifier is for any assignment. Values 5. /
1065	#define IDENTIFIER_ASSIGN_OP_P(NODE) \
1066	(IDENTIFIER_OVL_OP_P (NODE) \
1067	& IDENTIFIER_KIND_BIT_0 (NODE))
1068
1069	/ True if this identifier is the name of a type-conversion*
1070	operator. Value 7. /*
1071	#define IDENTIFIER_CONV_OP_P(NODE) \
1072	(IDENTIFIER_ANY_OP_P (NODE) \
1073	& IDENTIFIER_KIND_BIT_1 (NODE) \
1074	& (!IDENTIFIER_KIND_BIT_0 (NODE)))
1075
1076	/ True if this identifier is a new or delete operator. /
1077	#define IDENTIFIER_NEWDEL_OP_P(NODE) \
1078	(IDENTIFIER_OVL_OP_P (NODE) \
1079	&& IDENTIFIER_OVL_OP_FLAGS (NODE) & OVL_OP_FLAG_ALLOC)
1080
1081	/ True if this identifier is a new operator. /
1082	#define IDENTIFIER_NEW_OP_P(NODE) \
1083	(IDENTIFIER_OVL_OP_P (NODE) \
1084	&& (IDENTIFIER_OVL_OP_FLAGS (NODE) \
1085	& (OVL_OP_FLAG_ALLOC \| OVL_OP_FLAG_DELETE)) == OVL_OP_FLAG_ALLOC)
1086
1087	/ Access a C++-specific index for identifier NODE.*
1088	Used to optimize operator mappings etc. /*
1089	#define IDENTIFIER_CP_INDEX(NODE) \
1090	(IDENTIFIER_NODE_CHECK(NODE)->base.u.bits.address_space)
1091
1092	/ In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only. /
1093	#define C_TYPE_FIELDS_READONLY(TYPE) \
1094	(LANG_TYPE_CLASS_CHECK (TYPE)->fields_readonly)
1095
1096	/ The tokens stored in the default argument. /
1097
1098	#define DEFARG_TOKENS(NODE) \
1099	(((struct tree_default_arg *)DEFAULT_ARG_CHECK (NODE))->tokens)
1100	#define DEFARG_INSTANTIATIONS(NODE) \
1101	(((struct tree_default_arg *)DEFAULT_ARG_CHECK (NODE))->instantiations)
1102
1103	struct GTY (()) tree_default_arg {
1104	struct tree_common common;
1105	struct cp_token_cache *tokens;
1106	vec<tree, va_gc> *instantiations;
1107	};
1108
1109
1110	#define DEFERRED_NOEXCEPT_PATTERN(NODE) \
1111	(((struct tree_deferred_noexcept *)DEFERRED_NOEXCEPT_CHECK (NODE))->pattern)
1112	#define DEFERRED_NOEXCEPT_ARGS(NODE) \
1113	(((struct tree_deferred_noexcept *)DEFERRED_NOEXCEPT_CHECK (NODE))->args)
1114	#define DEFERRED_NOEXCEPT_SPEC_P(NODE) \
1115	((NODE) && (TREE_PURPOSE (NODE)) \
1116	&& (TREE_CODE (TREE_PURPOSE (NODE)) == DEFERRED_NOEXCEPT))
1117	#define UNEVALUATED_NOEXCEPT_SPEC_P(NODE) \
1118	(DEFERRED_NOEXCEPT_SPEC_P (NODE) \
1119	&& DEFERRED_NOEXCEPT_PATTERN (TREE_PURPOSE (NODE)) == NULL_TREE)
1120
1121	struct GTY (()) tree_deferred_noexcept {
1122	struct tree_base base;
1123	tree pattern;
1124	tree args;
1125	};
1126
1127
1128	/ The condition associated with the static assertion. This must be*
1129	an integral constant expression. /*
1130	#define STATIC_ASSERT_CONDITION(NODE) \
1131	(((struct tree_static_assert *)STATIC_ASSERT_CHECK (NODE))->condition)
1132
1133	/ The message associated with the static assertion. This must be a*
1134	string constant, which will be emitted as an error message when the
1135	static assert condition is false. /*
1136	#define STATIC_ASSERT_MESSAGE(NODE) \
1137	(((struct tree_static_assert *)STATIC_ASSERT_CHECK (NODE))->message)
1138
1139	/ Source location information for a static assertion. /
1140	#define STATIC_ASSERT_SOURCE_LOCATION(NODE) \
1141	(((struct tree_static_assert *)STATIC_ASSERT_CHECK (NODE))->location)
1142
1143	struct GTY (()) tree_static_assert {
1144	struct tree_common common;
1145	tree condition;
1146	tree message;
1147	location_t location;
1148	};
1149
1150	struct GTY (()) tree_argument_pack_select {
1151	struct tree_common common;
1152	tree argument_pack;
1153	int index;
1154	};
1155
1156	/ The different kinds of traits that we encounter. /
1157
1158	enum cp_trait_kind
1159	{
1160	CPTK_BASES,
1161	CPTK_DIRECT_BASES,
1162	CPTK_HAS_NOTHROW_ASSIGN,
1163	CPTK_HAS_NOTHROW_CONSTRUCTOR,
1164	CPTK_HAS_NOTHROW_COPY,
1165	CPTK_HAS_TRIVIAL_ASSIGN,
1166	CPTK_HAS_TRIVIAL_CONSTRUCTOR,
1167	CPTK_HAS_TRIVIAL_COPY,
1168	CPTK_HAS_TRIVIAL_DESTRUCTOR,
1169	CPTK_HAS_UNIQUE_OBJ_REPRESENTATIONS,
1170	CPTK_HAS_VIRTUAL_DESTRUCTOR,
1171	CPTK_IS_ABSTRACT,
1172	CPTK_IS_AGGREGATE,
1173	CPTK_IS_BASE_OF,
1174	CPTK_IS_CLASS,
1175	CPTK_IS_EMPTY,
1176	CPTK_IS_ENUM,
1177	CPTK_IS_FINAL,
1178	CPTK_IS_LITERAL_TYPE,
1179	CPTK_IS_POD,
1180	CPTK_IS_POLYMORPHIC,
1181	CPTK_IS_SAME_AS,
1182	CPTK_IS_STD_LAYOUT,
1183	CPTK_IS_TRIVIAL,
1184	CPTK_IS_TRIVIALLY_ASSIGNABLE,
1185	CPTK_IS_TRIVIALLY_CONSTRUCTIBLE,
1186	CPTK_IS_TRIVIALLY_COPYABLE,
1187	CPTK_IS_UNION,
1188	CPTK_UNDERLYING_TYPE,
1189	CPTK_IS_ASSIGNABLE,
1190	CPTK_IS_CONSTRUCTIBLE
1191	};
1192
1193	/ The types that we are processing. /
1194	#define TRAIT_EXPR_TYPE1(NODE) \
1195	(((struct tree_trait_expr *)TRAIT_EXPR_CHECK (NODE))->type1)
1196
1197	#define TRAIT_EXPR_TYPE2(NODE) \
1198	(((struct tree_trait_expr *)TRAIT_EXPR_CHECK (NODE))->type2)
1199
1200	/ The specific trait that we are processing. /
1201	#define TRAIT_EXPR_KIND(NODE) \
1202	(((struct tree_trait_expr *)TRAIT_EXPR_CHECK (NODE))->kind)
1203
1204	struct GTY (()) tree_trait_expr {
1205	struct tree_common common;
1206	tree type1;
1207	tree type2;
1208	enum cp_trait_kind kind;
1209	};
1210
1211	/ Based off of TYPE_UNNAMED_P. /
1212	#define LAMBDA_TYPE_P(NODE) \
1213	(CLASS_TYPE_P (NODE) && CLASSTYPE_LAMBDA_EXPR (NODE))
1214
1215	/ Test if FUNCTION_DECL is a lambda function. /
1216	#define LAMBDA_FUNCTION_P(FNDECL) \
1217	(DECL_DECLARES_FUNCTION_P (FNDECL) \
1218	&& DECL_OVERLOADED_OPERATOR_P (FNDECL) \
1219	&& DECL_OVERLOADED_OPERATOR_IS (FNDECL, CALL_EXPR) \
1220	&& LAMBDA_TYPE_P (CP_DECL_CONTEXT (FNDECL)))
1221
1222	enum cp_lambda_default_capture_mode_type {
1223	CPLD_NONE,
1224	CPLD_COPY,
1225	CPLD_REFERENCE
1226	};
1227
1228	/ The method of default capture, if any. /
1229	#define LAMBDA_EXPR_DEFAULT_CAPTURE_MODE(NODE) \
1230	(((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->default_capture_mode)
1231
1232	/ The capture-list, including `this'. Each capture is stored as a FIELD_DECL*
1233	* so that the name, type, and field are all together, whether or not it has
1234	* been added to the lambda's class type.
1235	TREE_LIST:
1236	TREE_PURPOSE: The FIELD_DECL for this capture.
1237	TREE_VALUE: The initializer. This is part of a GNU extension. /*
1238	#define LAMBDA_EXPR_CAPTURE_LIST(NODE) \
1239	(((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->capture_list)
1240
1241	/ During parsing of the lambda-introducer, the node in the capture-list*
1242	that holds the 'this' capture. During parsing of the body, the
1243	capture proxy for that node. /*
1244	#define LAMBDA_EXPR_THIS_CAPTURE(NODE) \
1245	(((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->this_capture)
1246
1247	/ Predicate tracking whether `this' is in the effective capture set. /
1248	#define LAMBDA_EXPR_CAPTURES_THIS_P(NODE) \
1249	LAMBDA_EXPR_THIS_CAPTURE(NODE)
1250
1251	/ Predicate tracking whether the lambda was declared 'mutable'. /
1252	#define LAMBDA_EXPR_MUTABLE_P(NODE) \
1253	TREE_LANG_FLAG_1 (LAMBDA_EXPR_CHECK (NODE))
1254
1255	/ The source location of the lambda. /
1256	#define LAMBDA_EXPR_LOCATION(NODE) \
1257	(((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->locus)
1258
1259	/ The mangling scope for the lambda: FUNCTION_DECL, PARM_DECL, VAR_DECL,*
1260	FIELD_DECL or NULL_TREE. If this is NULL_TREE, we have no linkage. /*
1261	#define LAMBDA_EXPR_EXTRA_SCOPE(NODE) \
1262	(((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->extra_scope)
1263
1264	/ If EXTRA_SCOPE, this is the number of the lambda within that scope. /
1265	#define LAMBDA_EXPR_DISCRIMINATOR(NODE) \
1266	(((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->discriminator)
1267
1268	/ During parsing of the lambda, a vector of capture proxies which need*
1269	to be pushed once we're done processing a nested lambda. /*
1270	#define LAMBDA_EXPR_PENDING_PROXIES(NODE) \
1271	(((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->pending_proxies)
1272
1273	/ The closure type of the lambda, which is also the type of the*
1274	LAMBDA_EXPR. /*
1275	#define LAMBDA_EXPR_CLOSURE(NODE) \
1276	(TREE_TYPE (LAMBDA_EXPR_CHECK (NODE)))
1277
1278	struct GTY (()) tree_lambda_expr
1279	{
1280	struct tree_typed typed;
1281	tree capture_list;
1282	tree this_capture;
1283	tree extra_scope;
1284	vec<tree, va_gc> *pending_proxies;
1285	location_t locus;
1286	enum cp_lambda_default_capture_mode_type default_capture_mode;
1287	int discriminator;
1288	};
1289
1290	/ A (typedef,context,usage location) triplet.*
1291	It represents a typedef used through a
1292	context at a given source location.
1293	e.g.
1294	struct foo {
1295	typedef int myint;
1296	};
1297
1298	struct bar {
1299	foo::myint v; // #1<-- this location.
1300	};
1301
1302	In bar, the triplet will be (myint, foo, #1).
1303	*/
1304	struct GTY(()) qualified_typedef_usage_s {
1305	tree typedef_decl;
1306	tree context;
1307	location_t locus;
1308	};
1309	typedef struct qualified_typedef_usage_s qualified_typedef_usage_t;
1310
1311	/ Non-zero if this template specialization has access violations that*
1312	should be rechecked when the function is instantiated outside argument
1313	deduction. /*
1314	#define TINFO_HAS_ACCESS_ERRORS(NODE) \
1315	(TREE_LANG_FLAG_0 (TEMPLATE_INFO_CHECK (NODE)))
1316	#define FNDECL_HAS_ACCESS_ERRORS(NODE) \
1317	(TINFO_HAS_ACCESS_ERRORS (DECL_TEMPLATE_INFO (NODE)))
1318
1319	/ Non-zero if this variable template specialization was specified using a*
1320	template-id, so it's a partial or full specialization and not a definition
1321	of the member template of a particular class specialization. /*
1322	#define TINFO_USED_TEMPLATE_ID(NODE) \
1323	(TREE_LANG_FLAG_1 (TEMPLATE_INFO_CHECK (NODE)))
1324
1325	struct GTY(()) tree_template_info {
1326	struct tree_common common;
1327	vec<qualified_typedef_usage_t, va_gc> *typedefs_needing_access_checking;
1328	};
1329
1330	// Constraint information for a C++ declaration. Constraint information is
1331	// comprised of:
1332	//
1333	// - a constraint expression introduced by the template header
1334	// - a constraint expression introduced by a function declarator
1335	// - the associated constraints, which are the conjunction of those,
1336	// and used for declaration matching
1337	//
1338	// The template and declarator requirements are kept to support pretty
1339	// printing constrained declarations.
1340	struct GTY(()) tree_constraint_info {
1341	struct tree_base base;
1342	tree template_reqs;
1343	tree declarator_reqs;
1344	tree associated_constr;
1345	};
1346
1347	// Require that pointer P is non-null before returning.
1348	template<typename T>
1349	inline T*
1350	check_nonnull (T* p)
1351	{
1352	gcc_assert (p);
1353	return p;
1354	}
1355
1356	// Returns true iff T is non-null and represents constraint info.
1357	inline tree_constraint_info *
1358	check_constraint_info (tree t)
1359	{
1360	if (t && TREE_CODE (t) == CONSTRAINT_INFO)
1361	return (tree_constraint_info *)t;
1362	return NULL;
1363	}
1364
1365	// Access the expression describing the template constraints. This may be
1366	// null if no constraints were introduced in the template parameter list,
1367	// a requirements clause after the template parameter list, or constraints
1368	// through a constrained-type-specifier.
1369	#define CI_TEMPLATE_REQS(NODE) \
1370	check_constraint_info (check_nonnull(NODE))->template_reqs
1371
1372	// Access the expression describing the trailing constraints. This is non-null
1373	// for any implicit instantiation of a constrained declaration. For a
1374	// templated declaration it is non-null only when a trailing requires-clause
1375	// was specified.
1376	#define CI_DECLARATOR_REQS(NODE) \
1377	check_constraint_info (check_nonnull(NODE))->declarator_reqs
1378
1379	// The computed associated constraint expression for a declaration.
1380	#define CI_ASSOCIATED_CONSTRAINTS(NODE) \
1381	check_constraint_info (check_nonnull(NODE))->associated_constr
1382
1383	// Access the logical constraints on the template parameters introduced
1384	// at a given template parameter list level indicated by NODE.
1385	#define TEMPLATE_PARMS_CONSTRAINTS(NODE) \
1386	TREE_TYPE (TREE_LIST_CHECK (NODE))
1387
1388	// Access the logical constraints on the template parameter declaration
1389	// indicated by NODE.
1390	#define TEMPLATE_PARM_CONSTRAINTS(NODE) \
1391	TREE_TYPE (TREE_LIST_CHECK (NODE))
1392
1393	/ Non-zero if the noexcept is present in a compound requirement. /
1394	#define COMPOUND_REQ_NOEXCEPT_P(NODE) \
1395	TREE_LANG_FLAG_0 (TREE_CHECK (NODE, COMPOUND_REQ))
1396
1397	/ The constraints on an 'auto' placeholder type, used in an argument deduction*
1398	constraint. /*
1399	#define PLACEHOLDER_TYPE_CONSTRAINTS(NODE) \
1400	DECL_SIZE_UNIT (TYPE_NAME (NODE))
1401
1402	/ The expression evaluated by the predicate constraint. /
1403	#define PRED_CONSTR_EXPR(NODE) \
1404	TREE_OPERAND (TREE_CHECK (NODE, PRED_CONSTR), 0)
1405
1406	/ The concept of a concept check. /
1407	#define CHECK_CONSTR_CONCEPT(NODE) \
1408	TREE_OPERAND (TREE_CHECK (NODE, CHECK_CONSTR), 0)
1409
1410	/ The template arguments of a concept check. /
1411	#define CHECK_CONSTR_ARGS(NODE) \
1412	TREE_OPERAND (TREE_CHECK (NODE, CHECK_CONSTR), 1)
1413
1414	/ The expression validated by the predicate constraint. /
1415	#define EXPR_CONSTR_EXPR(NODE) \
1416	TREE_OPERAND (TREE_CHECK (NODE, EXPR_CONSTR), 0)
1417
1418	/ The type validated by the predicate constraint. /
1419	#define TYPE_CONSTR_TYPE(NODE) \
1420	TREE_OPERAND (TREE_CHECK (NODE, TYPE_CONSTR), 0)
1421
1422	/ In an implicit conversion constraint, the source expression. /
1423	#define ICONV_CONSTR_EXPR(NODE) \
1424	TREE_OPERAND (TREE_CHECK (NODE, ICONV_CONSTR), 0)
1425
1426	/ In an implicit conversion constraint, the target type. /
1427	#define ICONV_CONSTR_TYPE(NODE) \
1428	TREE_OPERAND (TREE_CHECK (NODE, ICONV_CONSTR), 1)
1429
1430	/ In an argument deduction constraint, the source expression. /
1431	#define DEDUCT_CONSTR_EXPR(NODE) \
1432	TREE_OPERAND (TREE_CHECK (NODE, DEDUCT_CONSTR), 0)
1433
1434	/ In an argument deduction constraint, the target type pattern. /
1435	#define DEDUCT_CONSTR_PATTERN(NODE) \
1436	TREE_OPERAND (TREE_CHECK (NODE, DEDUCT_CONSTR), 1)
1437
1438	/ In an argument deduction constraint, the list of placeholder nodes. /
1439	#define DEDUCT_CONSTR_PLACEHOLDER(NODE) \
1440	TREE_OPERAND (TREE_CHECK (NODE, DEDUCT_CONSTR), 2)
1441
1442	/ The expression of an exception constraint. /
1443	#define EXCEPT_CONSTR_EXPR(NODE) \
1444	TREE_OPERAND (TREE_CHECK (NODE, EXCEPT_CONSTR), 0)
1445
1446	/ In a parameterized constraint, the local parameters. /
1447	#define PARM_CONSTR_PARMS(NODE) \
1448	TREE_OPERAND (TREE_CHECK (NODE, PARM_CONSTR), 0)
1449
1450	/ In a parameterized constraint, the operand. /
1451	#define PARM_CONSTR_OPERAND(NODE) \
1452	TREE_OPERAND (TREE_CHECK (NODE, PARM_CONSTR), 1)
1453
1454	/ Whether a PARM_DECL represents a local parameter in a*
1455	requires-expression. /*
1456	#define CONSTRAINT_VAR_P(NODE) \
1457	DECL_LANG_FLAG_2 (TREE_CHECK (NODE, PARM_DECL))
1458
1459	/ The concept constraining this constrained template-parameter. /
1460	#define CONSTRAINED_PARM_CONCEPT(NODE) \
1461	DECL_SIZE_UNIT (TYPE_DECL_CHECK (NODE))
1462	/ Any extra template arguments specified for a constrained*
1463	template-parameter. /*
1464	#define CONSTRAINED_PARM_EXTRA_ARGS(NODE) \
1465	DECL_SIZE (TYPE_DECL_CHECK (NODE))
1466	/ The first template parameter of CONSTRAINED_PARM_CONCEPT to be used as a*
1467	prototype for the constrained parameter in finish_shorthand_constraint,
1468	attached for convenience. /*
1469	#define CONSTRAINED_PARM_PROTOTYPE(NODE) \
1470	DECL_INITIAL (TYPE_DECL_CHECK (NODE))
1471
1472	enum cp_tree_node_structure_enum {
1473	TS_CP_GENERIC,
1474	TS_CP_IDENTIFIER,
1475	TS_CP_TPI,
1476	TS_CP_PTRMEM,
1477	TS_CP_OVERLOAD,
1478	TS_CP_BASELINK,
1479	TS_CP_TEMPLATE_DECL,
1480	TS_CP_DEFAULT_ARG,
1481	TS_CP_DEFERRED_NOEXCEPT,
1482	TS_CP_STATIC_ASSERT,
1483	TS_CP_ARGUMENT_PACK_SELECT,
1484	TS_CP_TRAIT_EXPR,
1485	TS_CP_LAMBDA_EXPR,
1486	TS_CP_TEMPLATE_INFO,
1487	TS_CP_CONSTRAINT_INFO,
1488	TS_CP_USERDEF_LITERAL
1489	};
1490
1491	/ The resulting tree type. /
1492	union GTY((desc ("cp_tree_node_structure (&%h)"),
1493	chain_next ("(union lang_tree_node *) c_tree_chain_next (&%h.generic)"))) lang_tree_node {
1494	union tree_node GTY ((tag ("TS_CP_GENERIC"),
1495	desc ("tree_node_structure (&%h)"))) generic;
1496	struct template_parm_index GTY ((tag ("TS_CP_TPI"))) tpi;
1497	struct ptrmem_cst GTY ((tag ("TS_CP_PTRMEM"))) ptrmem;
1498	struct tree_overload GTY ((tag ("TS_CP_OVERLOAD"))) overload;
1499	struct tree_baselink GTY ((tag ("TS_CP_BASELINK"))) baselink;
1500	struct tree_template_decl GTY ((tag ("TS_CP_TEMPLATE_DECL"))) template_decl;
1501	struct tree_default_arg GTY ((tag ("TS_CP_DEFAULT_ARG"))) default_arg;
1502	struct tree_deferred_noexcept GTY ((tag ("TS_CP_DEFERRED_NOEXCEPT"))) deferred_noexcept;
1503	struct lang_identifier GTY ((tag ("TS_CP_IDENTIFIER"))) identifier;
1504	struct tree_static_assert GTY ((tag ("TS_CP_STATIC_ASSERT")))
1505	static_assertion;
1506	struct tree_argument_pack_select GTY ((tag ("TS_CP_ARGUMENT_PACK_SELECT")))
1507	argument_pack_select;
1508	struct tree_trait_expr GTY ((tag ("TS_CP_TRAIT_EXPR")))
1509	trait_expression;
1510	struct tree_lambda_expr GTY ((tag ("TS_CP_LAMBDA_EXPR")))
1511	lambda_expression;
1512	struct tree_template_info GTY ((tag ("TS_CP_TEMPLATE_INFO")))
1513	template_info;
1514	struct tree_constraint_info GTY ((tag ("TS_CP_CONSTRAINT_INFO")))
1515	constraint_info;
1516	struct tree_userdef_literal GTY ((tag ("TS_CP_USERDEF_LITERAL")))
1517	userdef_literal;
1518	};
1519
1520
1521	/ Global state. /
1522
1523	struct GTY(()) saved_scope {
1524	vec<cxx_saved_binding, va_gc> *old_bindings;
1525	tree old_namespace;
1526	vec<tree, va_gc> *decl_ns_list;
1527	tree class_name;
1528	tree class_type;
1529	tree access_specifier;
1530	tree function_decl;
1531	vec<tree, va_gc> *lang_base;
1532	tree lang_name;
1533	tree template_parms;
1534	cp_binding_level *x_previous_class_level;
1535	tree x_saved_tree;
1536
1537	/ Only used for uses of this in trailing return type. /
1538	tree x_current_class_ptr;
1539	tree x_current_class_ref;
1540
1541	int x_processing_template_decl;
1542	int x_processing_specialization;
1543	BOOL_BITFIELD x_processing_explicit_instantiation : `1`;
1544	BOOL_BITFIELD need_pop_function_context : `1`;
1545
1546	/ Nonzero if we are parsing the discarded statement of a constexpr*
1547	if-statement. /*
1548	BOOL_BITFIELD discarded_stmt : `1`;
1549
1550	int unevaluated_operand;
1551	int inhibit_evaluation_warnings;
1552	int noexcept_operand;
1553	/ If non-zero, implicit "omp declare target" attribute is added into the*
1554	attribute lists. /*
1555	int omp_declare_target_attribute;
1556
1557	struct stmt_tree_s x_stmt_tree;
1558
1559	cp_binding_level *class_bindings;
1560	cp_binding_level *bindings;
1561
1562	hash_map<tree, tree> *GTY((skip)) x_local_specializations;
1563
1564	struct saved_scope *prev;
1565	};
1566
1567	extern GTY(()) struct saved_scope *scope_chain;
1568
1569	/ The current open namespace. /
1570
1571	#define current_namespace scope_chain->old_namespace
1572
1573	/ The stack for namespaces of current declarations. /
1574
1575	#define decl_namespace_list scope_chain->decl_ns_list
1576
1577	/ IDENTIFIER_NODE: name of current class /
1578
1579	#define current_class_name scope_chain->class_name
1580
1581	/ _TYPE: the type of the current class /
1582
1583	#define current_class_type scope_chain->class_type
1584
1585	/ When parsing a class definition, the access specifier most recently*
1586	given by the user, or, if no access specifier was given, the
1587	default value appropriate for the kind of class (i.e., struct,
1588	class, or union). /*
1589
1590	#define current_access_specifier scope_chain->access_specifier
1591
1592	/ Pointer to the top of the language name stack. /
1593
1594	#define current_lang_base scope_chain->lang_base
1595	#define current_lang_name scope_chain->lang_name
1596
1597	/ When parsing a template declaration, a TREE_LIST represents the*
1598	active template parameters. Each node in the list represents one
1599	level of template parameters. The innermost level is first in the
1600	list. The depth of each level is stored as an INTEGER_CST in the
1601	TREE_PURPOSE of each node. The parameters for that level are
1602	stored in the TREE_VALUE. /*
1603
1604	#define current_template_parms scope_chain->template_parms
1605
1606	#define processing_template_decl scope_chain->x_processing_template_decl
1607	#define processing_specialization scope_chain->x_processing_specialization
1608	#define processing_explicit_instantiation scope_chain->x_processing_explicit_instantiation
1609
1610	#define in_discarded_stmt scope_chain->discarded_stmt
1611
1612	/ RAII sentinel to handle clearing processing_template_decl and restoring*
1613	it when done. /*
1614
1615	struct processing_template_decl_sentinel
1616	{
1617	int saved;
1618	processing_template_decl_sentinel (bool reset = true)
1619	: saved (processing_template_decl)
1620	{
1621	if (reset)
1622	processing_template_decl = `0`;
1623	}
1624	~processing_template_decl_sentinel()
1625	{
1626	processing_template_decl = saved;
1627	}
1628	};
1629
1630	/ RAII sentinel to disable certain warnings during template substitution*
1631	and elsewhere. /*
1632
1633	struct warning_sentinel
1634	{
1635	int &flag;
1636	int val;
1637	warning_sentinel(int& flag, bool suppress=true)
1638	: flag(flag), val(flag) { if (suppress) flag = `0`; }
1639	~warning_sentinel() { flag = val; }
1640	};
1641
1642	/ The cached class binding level, from the most recently exited*
1643	class, or NULL if none. /*
1644
1645	#define previous_class_level scope_chain->x_previous_class_level
1646
1647	/ A map from local variable declarations in the body of the template*
1648	presently being instantiated to the corresponding instantiated
1649	local variables. /*
1650
1651	#define local_specializations scope_chain->x_local_specializations
1652
1653	/ Nonzero if we are parsing the operand of a noexcept operator. /
1654
1655	#define cp_noexcept_operand scope_chain->noexcept_operand
1656
1657	/ A list of private types mentioned, for deferred access checking. /
1658
1659	struct GTY((for_user)) cxx_int_tree_map {
1660	unsigned int uid;
1661	tree to;
1662	};
1663
1664	struct cxx_int_tree_map_hasher : ggc_ptr_hash<cxx_int_tree_map>
1665	{
1666	static hashval_t hash (cxx_int_tree_map *);
1667	static bool equal (cxx_int_tree_map , cxx_int_tree_map );
1668	};
1669
1670	struct named_label_entry; / Defined in decl.c. /
1671
1672	struct named_label_hash : ggc_remove <named_label_entry *>
1673	{
1674	typedef named_label_entry *value_type;
1675	typedef tree compare_type; / An identifier. /
1676
1677	inline static hashval_t hash (value_type);
1678	inline static bool equal (const value_type, compare_type);
1679
1680	inline static void mark_empty (value_type &p) {p = NULL;}
1681	inline static bool is_empty (value_type p) {return !p;}
1682
1683	/ Nothing is deletable. Everything is insertable. /
1684	inline static bool is_deleted (value_type) { return false; }
1685	inline static void mark_deleted (value_type) { gcc_unreachable (); }
1686	};
1687
1688	/ Global state pertinent to the current function. /
1689
1690	struct GTY(()) language_function {
1691	struct c_language_function base;
1692
1693	tree x_cdtor_label;
1694	tree x_current_class_ptr;
1695	tree x_current_class_ref;
1696	tree x_eh_spec_block;
1697	tree x_in_charge_parm;
1698	tree x_vtt_parm;
1699	tree x_return_value;
1700	tree x_auto_return_pattern;
1701
1702	BOOL_BITFIELD returns_value : `1`;
1703	BOOL_BITFIELD returns_null : `1`;
1704	BOOL_BITFIELD returns_abnormally : `1`;
1705	BOOL_BITFIELD infinite_loop: `1`;
1706	BOOL_BITFIELD x_in_function_try_handler : `1`;
1707	BOOL_BITFIELD x_in_base_initializer : `1`;
1708
1709	/ True if this function can throw an exception. /
1710	BOOL_BITFIELD can_throw : `1`;
1711
1712	BOOL_BITFIELD invalid_constexpr : `1`;
1713
1714	hash_table<named_label_hash> *x_named_labels;
1715
1716	cp_binding_level *bindings;
1717	vec<tree, va_gc> *x_local_names;
1718	/ Tracking possibly infinite loops. This is a vec<tree> only because*
1719	vec<bool> doesn't work with gtype. /*
1720	vec<tree, va_gc> *infinite_loops;
1721	hash_table<cxx_int_tree_map_hasher> *extern_decl_map;
1722	};
1723
1724	/ The current C++-specific per-function global variables. /
1725
1726	#define cp_function_chain (cfun->language)
1727
1728	/ In a constructor destructor, the point at which all derived class*
1729	destroying/construction has been done. I.e., just before a
1730	constructor returns, or before any base class destroying will be done
1731	in a destructor. /*
1732
1733	#define cdtor_label cp_function_chain->x_cdtor_label
1734
1735	/ When we're processing a member function, current_class_ptr is the*
1736	PARM_DECL for the `this' pointer. The current_class_ref is an
1737	expression for `this'. /
1738
1739	#define current_class_ptr \
1740	(*(cfun && cp_function_chain \
1741	? &cp_function_chain->x_current_class_ptr \
1742	: &scope_chain->x_current_class_ptr))
1743	#define current_class_ref \
1744	(*(cfun && cp_function_chain \
1745	? &cp_function_chain->x_current_class_ref \
1746	: &scope_chain->x_current_class_ref))
1747
1748	/ The EH_SPEC_BLOCK for the exception-specifiers for the current*
1749	function, if any. /*
1750
1751	#define current_eh_spec_block cp_function_chain->x_eh_spec_block
1752
1753	/ The `__in_chrg' parameter for the current function. Only used for*
1754	constructors and destructors. /*
1755
1756	#define current_in_charge_parm cp_function_chain->x_in_charge_parm
1757
1758	/ The `__vtt_parm' parameter for the current function. Only used for*
1759	constructors and destructors. /*
1760
1761	#define current_vtt_parm cp_function_chain->x_vtt_parm
1762
1763	/ Set to 0 at beginning of a function definition, set to 1 if*
1764	a return statement that specifies a return value is seen. /*
1765
1766	#define current_function_returns_value cp_function_chain->returns_value
1767
1768	/ Set to 0 at beginning of a function definition, set to 1 if*
1769	a return statement with no argument is seen. /*
1770
1771	#define current_function_returns_null cp_function_chain->returns_null
1772
1773	/ Set to 0 at beginning of a function definition, set to 1 if*
1774	a call to a noreturn function is seen. /*
1775
1776	#define current_function_returns_abnormally \
1777	cp_function_chain->returns_abnormally
1778
1779	/ Set to 0 at beginning of a function definition, set to 1 if we see an*
1780	obvious infinite loop. This can have false positives and false
1781	negatives, so it should only be used as a heuristic. /*
1782
1783	#define current_function_infinite_loop cp_function_chain->infinite_loop
1784
1785	/ Nonzero if we are processing a base initializer. Zero elsewhere. /
1786	#define in_base_initializer cp_function_chain->x_in_base_initializer
1787
1788	#define in_function_try_handler cp_function_chain->x_in_function_try_handler
1789
1790	/ Expression always returned from function, or error_mark_node*
1791	otherwise, for use by the automatic named return value optimization. /*
1792
1793	#define current_function_return_value \
1794	(cp_function_chain->x_return_value)
1795
1796	/ A type involving 'auto' to be used for return type deduction. /
1797
1798	#define current_function_auto_return_pattern \
1799	(cp_function_chain->x_auto_return_pattern)
1800
1801	/ In parser.c. /
1802	extern tree cp_literal_operator_id (const char *);
1803
1804	/ TRUE if a tree code represents a statement. /
1805	extern bool statement_code_p[MAX_TREE_CODES];
1806
1807	#define STATEMENT_CODE_P(CODE) statement_code_p[(int) (CODE)]
1808
1809	enum languages { lang_c, lang_cplusplus };
1810
1811	/ Macros to make error reporting functions' lives easier. /
1812	#define TYPE_LINKAGE_IDENTIFIER(NODE) \
1813	(TYPE_IDENTIFIER (TYPE_MAIN_VARIANT (NODE)))
1814	#define TYPE_NAME_STRING(NODE) (IDENTIFIER_POINTER (TYPE_IDENTIFIER (NODE)))
1815	#define TYPE_NAME_LENGTH(NODE) (IDENTIFIER_LENGTH (TYPE_IDENTIFIER (NODE)))
1816
1817	/ Nonzero if NODE has no name for linkage purposes. /
1818	#define TYPE_UNNAMED_P(NODE) \
1819	(OVERLOAD_TYPE_P (NODE) && anon_aggrname_p (TYPE_LINKAGE_IDENTIFIER (NODE)))
1820
1821	/ The _DECL for this _TYPE. /
1822	#define TYPE_MAIN_DECL(NODE) (TYPE_STUB_DECL (TYPE_MAIN_VARIANT (NODE)))
1823
1824	/ Nonzero if T is a type that could resolve to any kind of concrete type*
1825	at instantiation time. /*
1826	#define WILDCARD_TYPE_P(T) \
1827	(TREE_CODE (T) == TEMPLATE_TYPE_PARM \
1828	\|\| TREE_CODE (T) == TYPENAME_TYPE \
1829	\|\| TREE_CODE (T) == TYPEOF_TYPE \
1830	\|\| TREE_CODE (T) == BOUND_TEMPLATE_TEMPLATE_PARM \
1831	\|\| TREE_CODE (T) == DECLTYPE_TYPE)
1832
1833	/ Nonzero if T is a class (or struct or union) type. Also nonzero*
1834	for template type parameters, typename types, and instantiated
1835	template template parameters. Keep these checks in ascending code
1836	order. /*
1837	#define MAYBE_CLASS_TYPE_P(T) (WILDCARD_TYPE_P (T) \|\| CLASS_TYPE_P (T))
1838
1839	/ Set CLASS_TYPE_P for T to VAL. T must be a class, struct, or*
1840	union type. /*
1841	#define SET_CLASS_TYPE_P(T, VAL) \
1842	(TYPE_LANG_FLAG_5 (RECORD_OR_UNION_CHECK (T)) = (VAL))
1843
1844	/ Nonzero if T is a class type. Zero for template type parameters,*
1845	typename types, and so forth. /*
1846	#define CLASS_TYPE_P(T) \
1847	(RECORD_OR_UNION_CODE_P (TREE_CODE (T)) && TYPE_LANG_FLAG_5 (T))
1848
1849	/ Nonzero if T is a class type but not an union. /
1850	#define NON_UNION_CLASS_TYPE_P(T) \
1851	(TREE_CODE (T) == RECORD_TYPE && TYPE_LANG_FLAG_5 (T))
1852
1853	/ Keep these checks in ascending code order. /
1854	#define RECORD_OR_UNION_CODE_P(T) \
1855	((T) == RECORD_TYPE \|\| (T) == UNION_TYPE)
1856	#define OVERLOAD_TYPE_P(T) \
1857	(CLASS_TYPE_P (T) \|\| TREE_CODE (T) == ENUMERAL_TYPE)
1858
1859	/ True if this type is dependent. This predicate is only valid if*
1860	TYPE_DEPENDENT_P_VALID is true. /*
1861	#define TYPE_DEPENDENT_P(NODE) TYPE_LANG_FLAG_0 (NODE)
1862
1863	/ True if dependent_type_p has been called for this type, with the*
1864	result that TYPE_DEPENDENT_P is valid. /*
1865	#define TYPE_DEPENDENT_P_VALID(NODE) TYPE_LANG_FLAG_6(NODE)
1866
1867	/ Nonzero if this type is const-qualified. /
1868	#define CP_TYPE_CONST_P(NODE) \
1869	((cp_type_quals (NODE) & TYPE_QUAL_CONST) != 0)
1870
1871	/ Nonzero if this type is volatile-qualified. /
1872	#define CP_TYPE_VOLATILE_P(NODE) \
1873	((cp_type_quals (NODE) & TYPE_QUAL_VOLATILE) != 0)
1874
1875	/ Nonzero if this type is restrict-qualified. /
1876	#define CP_TYPE_RESTRICT_P(NODE) \
1877	((cp_type_quals (NODE) & TYPE_QUAL_RESTRICT) != 0)
1878
1879	/ Nonzero if this type is const-qualified, but not*
1880	volatile-qualified. Other qualifiers are ignored. This macro is
1881	used to test whether or not it is OK to bind an rvalue to a
1882	reference. /*
1883	#define CP_TYPE_CONST_NON_VOLATILE_P(NODE) \
1884	((cp_type_quals (NODE) & (TYPE_QUAL_CONST \| TYPE_QUAL_VOLATILE)) \
1885	== TYPE_QUAL_CONST)
1886
1887	#define FUNCTION_ARG_CHAIN(NODE) \
1888	TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (NODE)))
1889
1890	/ Given a FUNCTION_DECL, returns the first TREE_LIST out of TYPE_ARG_TYPES*
1891	which refers to a user-written parameter. /*
1892	#define FUNCTION_FIRST_USER_PARMTYPE(NODE) \
1893	skip_artificial_parms_for ((NODE), TYPE_ARG_TYPES (TREE_TYPE (NODE)))
1894
1895	/ Similarly, but for DECL_ARGUMENTS. /
1896	#define FUNCTION_FIRST_USER_PARM(NODE) \
1897	skip_artificial_parms_for ((NODE), DECL_ARGUMENTS (NODE))
1898
1899	/ Nonzero iff TYPE is derived from PARENT. Ignores accessibility and*
1900	ambiguity issues. /*
1901	#define DERIVED_FROM_P(PARENT, TYPE) \
1902	(lookup_base ((TYPE), (PARENT), ba_any, NULL, tf_none) != NULL_TREE)
1903
1904	/ Gives the visibility specification for a class type. /
1905	#define CLASSTYPE_VISIBILITY(TYPE) \
1906	DECL_VISIBILITY (TYPE_MAIN_DECL (TYPE))
1907	#define CLASSTYPE_VISIBILITY_SPECIFIED(TYPE) \
1908	DECL_VISIBILITY_SPECIFIED (TYPE_MAIN_DECL (TYPE))
1909
1910	struct GTY (()) tree_pair_s {
1911	tree purpose;
1912	tree value;
1913	};
1914	typedef tree_pair_s *tree_pair_p;
1915
1916	/ This structure provides additional information above and beyond*
1917	what is provide in the ordinary tree_type. In the past, we used it
1918	for the types of class types, template parameters types, typename
1919	types, and so forth. However, there can be many (tens to hundreds
1920	of thousands) of template parameter types in a compilation, and
1921	there's no need for this additional information in that case.
1922	Therefore, we now use this data structure only for class types.
1923
1924	In the past, it was thought that there would be relatively few
1925	class types. However, in the presence of heavy use of templates,
1926	many (i.e., thousands) of classes can easily be generated.
1927	Therefore, we should endeavor to keep the size of this structure to
1928	a minimum. /*
1929	struct GTY(()) lang_type {
1930	unsigned char align;
1931
1932	unsigned has_type_conversion : `1`;
1933	unsigned has_copy_ctor : `1`;
1934	unsigned has_default_ctor : `1`;
1935	unsigned const_needs_init : `1`;
1936	unsigned ref_needs_init : `1`;
1937	unsigned has_const_copy_assign : `1`;
1938	unsigned use_template : `2`;
1939
1940	unsigned has_mutable : `1`;
1941	unsigned com_interface : `1`;
1942	unsigned non_pod_class : `1`;
1943	unsigned nearly_empty_p : `1`;
1944	unsigned user_align : `1`;
1945	unsigned has_copy_assign : `1`;
1946	unsigned has_new : `1`;
1947	unsigned has_array_new : `1`;
1948
1949	unsigned gets_delete : `2`;
1950	unsigned interface_only : `1`;
1951	unsigned interface_unknown : `1`;
1952	unsigned contains_empty_class_p : `1`;
1953	unsigned anon_aggr : `1`;
1954	unsigned non_zero_init : `1`;
1955	unsigned empty_p : `1`;
1956	/ 32 bits allocated. /
1957
1958	unsigned vec_new_uses_cookie : `1`;
1959	unsigned declared_class : `1`;
1960	unsigned diamond_shaped : `1`;
1961	unsigned repeated_base : `1`;
1962	unsigned being_defined : `1`;
1963	unsigned debug_requested : `1`;
1964	unsigned fields_readonly : `1`;
1965	unsigned ptrmemfunc_flag : `1`;
1966
1967	unsigned was_anonymous : `1`;
1968	unsigned lazy_default_ctor : `1`;
1969	unsigned lazy_copy_ctor : `1`;
1970	unsigned lazy_copy_assign : `1`;
1971	unsigned lazy_destructor : `1`;
1972	unsigned has_const_copy_ctor : `1`;
1973	unsigned has_complex_copy_ctor : `1`;
1974	unsigned has_complex_copy_assign : `1`;
1975
1976	unsigned non_aggregate : `1`;
1977	unsigned has_complex_dflt : `1`;
1978	unsigned has_list_ctor : `1`;
1979	unsigned non_std_layout : `1`;
1980	unsigned is_literal : `1`;
1981	unsigned lazy_move_ctor : `1`;
1982	unsigned lazy_move_assign : `1`;
1983	unsigned has_complex_move_ctor : `1`;
1984
1985	unsigned has_complex_move_assign : `1`;
1986	unsigned has_constexpr_ctor : `1`;
1987	unsigned unique_obj_representations : `1`;
1988	unsigned unique_obj_representations_set : `1`;
1989
1990	/ When adding a flag here, consider whether or not it ought to*
1991	apply to a template instance if it applies to the template. If
1992	so, make sure to copy it in instantiate_class_template! /*
1993
1994	/ There are some bits left to fill out a 32-bit word. Keep track*
1995	of this by updating the size of this bitfield whenever you add or
1996	remove a flag. /*
1997	unsigned dummy : `4`;
1998
1999	tree primary_base;
2000	vec<tree_pair_s, va_gc> *vcall_indices;
2001	tree vtables;
2002	tree typeinfo_var;
2003	vec<tree, va_gc> *vbases;
2004	binding_table nested_udts;
2005	tree as_base;
2006	vec<tree, va_gc> *pure_virtuals;
2007	tree friend_classes;
2008	vec<tree, va_gc> * GTY((reorder ("resort_type_member_vec"))) members;
2009	tree key_method;
2010	tree decl_list;
2011	tree befriending_classes;
2012	/ In a RECORD_TYPE, information specific to Objective-C++, such*
2013	as a list of adopted protocols or a pointer to a corresponding
2014	@interface. See objc/objc-act.h for details. /*
2015	tree objc_info;
2016	/ FIXME reuse another field? /
2017	tree lambda_expr;
2018	};
2019
2020	/ We used to have a variant type for lang_type. Keep the name of the*
2021	checking accessor for the sole survivor. /*
2022	#define LANG_TYPE_CLASS_CHECK(NODE) (TYPE_LANG_SPECIFIC (NODE))
2023
2024	/ Nonzero for _CLASSTYPE means that operator delete is defined. /
2025	#define TYPE_GETS_DELETE(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->gets_delete)
2026	#define TYPE_GETS_REG_DELETE(NODE) (TYPE_GETS_DELETE (NODE) & 1)
2027
2028	/ Nonzero if `new NODE[x]' should cause the allocation of extra*
2029	storage to indicate how many array elements are in use. /*
2030	#define TYPE_VEC_NEW_USES_COOKIE(NODE) \
2031	(CLASS_TYPE_P (NODE) \
2032	&& LANG_TYPE_CLASS_CHECK (NODE)->vec_new_uses_cookie)
2033
2034	/ Nonzero means that this _CLASSTYPE node defines ways of converting*
2035	itself to other types. /*
2036	#define TYPE_HAS_CONVERSION(NODE) \
2037	(LANG_TYPE_CLASS_CHECK (NODE)->has_type_conversion)
2038
2039	/ Nonzero means that NODE (a class type) has a default constructor --*
2040	but that it has not yet been declared. /*
2041	#define CLASSTYPE_LAZY_DEFAULT_CTOR(NODE) \
2042	(LANG_TYPE_CLASS_CHECK (NODE)->lazy_default_ctor)
2043
2044	/ Nonzero means that NODE (a class type) has a copy constructor --*
2045	but that it has not yet been declared. /*
2046	#define CLASSTYPE_LAZY_COPY_CTOR(NODE) \
2047	(LANG_TYPE_CLASS_CHECK (NODE)->lazy_copy_ctor)
2048
2049	/ Nonzero means that NODE (a class type) has a move constructor --*
2050	but that it has not yet been declared. /*
2051	#define CLASSTYPE_LAZY_MOVE_CTOR(NODE) \
2052	(LANG_TYPE_CLASS_CHECK (NODE)->lazy_move_ctor)
2053
2054	/ Nonzero means that NODE (a class type) has an assignment operator*
2055	-- but that it has not yet been declared. /*
2056	#define CLASSTYPE_LAZY_COPY_ASSIGN(NODE) \
2057	(LANG_TYPE_CLASS_CHECK (NODE)->lazy_copy_assign)
2058
2059	/ Nonzero means that NODE (a class type) has an assignment operator*
2060	-- but that it has not yet been declared. /*
2061	#define CLASSTYPE_LAZY_MOVE_ASSIGN(NODE) \
2062	(LANG_TYPE_CLASS_CHECK (NODE)->lazy_move_assign)
2063
2064	/ Nonzero means that NODE (a class type) has a destructor -- but that*
2065	it has not yet been declared. /*
2066	#define CLASSTYPE_LAZY_DESTRUCTOR(NODE) \
2067	(LANG_TYPE_CLASS_CHECK (NODE)->lazy_destructor)
2068
2069	/ Nonzero means that NODE (a class type) is final /
2070	#define CLASSTYPE_FINAL(NODE) \
2071	TYPE_FINAL_P (NODE)
2072
2073
2074	/ Nonzero means that this _CLASSTYPE node overloads operator=(X&). /
2075	#define TYPE_HAS_COPY_ASSIGN(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_copy_assign)
2076
2077	/ True iff the class type NODE has an "operator =" whose parameter*
2078	has a parameter of type "const X&". /*
2079	#define TYPE_HAS_CONST_COPY_ASSIGN(NODE) \
2080	(LANG_TYPE_CLASS_CHECK (NODE)->has_const_copy_assign)
2081
2082	/ Nonzero means that this _CLASSTYPE node has an X(X&) constructor. /
2083	#define TYPE_HAS_COPY_CTOR(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_copy_ctor)
2084	#define TYPE_HAS_CONST_COPY_CTOR(NODE) \
2085	(LANG_TYPE_CLASS_CHECK (NODE)->has_const_copy_ctor)
2086
2087	/ Nonzero if this class has an X(initializer_list<T>) constructor. /
2088	#define TYPE_HAS_LIST_CTOR(NODE) \
2089	(LANG_TYPE_CLASS_CHECK (NODE)->has_list_ctor)
2090
2091	/ Nonzero if this class has a constexpr constructor other than a copy/move*
2092	constructor. Note that a class can have constexpr constructors for
2093	static initialization even if it isn't a literal class. /*
2094	#define TYPE_HAS_CONSTEXPR_CTOR(NODE) \
2095	(LANG_TYPE_CLASS_CHECK (NODE)->has_constexpr_ctor)
2096
2097	/ Nonzero if this class defines an overloaded operator new. (An*
2098	operator new [] doesn't count.) /*
2099	#define TYPE_HAS_NEW_OPERATOR(NODE) \
2100	(LANG_TYPE_CLASS_CHECK (NODE)->has_new)
2101
2102	/ Nonzero if this class defines an overloaded operator new[]. /
2103	#define TYPE_HAS_ARRAY_NEW_OPERATOR(NODE) \
2104	(LANG_TYPE_CLASS_CHECK (NODE)->has_array_new)
2105
2106	/ Nonzero means that this type is being defined. I.e., the left brace*
2107	starting the definition of this type has been seen. /*
2108	#define TYPE_BEING_DEFINED(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->being_defined)
2109
2110	/ Nonzero means that this type is either complete or being defined, so we*
2111	can do lookup in it. /*
2112	#define COMPLETE_OR_OPEN_TYPE_P(NODE) \
2113	(COMPLETE_TYPE_P (NODE) \|\| (CLASS_TYPE_P (NODE) && TYPE_BEING_DEFINED (NODE)))
2114
2115	/ Mark bits for repeated base checks. /
2116	#define TYPE_MARKED_P(NODE) TREE_LANG_FLAG_6 (TYPE_CHECK (NODE))
2117
2118	/ Nonzero if the class NODE has multiple paths to the same (virtual)*
2119	base object. /*
2120	#define CLASSTYPE_DIAMOND_SHAPED_P(NODE) \
2121	(LANG_TYPE_CLASS_CHECK(NODE)->diamond_shaped)
2122
2123	/ Nonzero if the class NODE has multiple instances of the same base*
2124	type. /*
2125	#define CLASSTYPE_REPEATED_BASE_P(NODE) \
2126	(LANG_TYPE_CLASS_CHECK(NODE)->repeated_base)
2127
2128	/ The member function with which the vtable will be emitted:*
2129	the first noninline non-pure-virtual member function. NULL_TREE
2130	if there is no key function or if this is a class template /*
2131	#define CLASSTYPE_KEY_METHOD(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->key_method)
2132
2133	/ Vector of members. During definition, it is unordered and only*
2134	member functions are present. After completion it is sorted and
2135	contains both member functions and non-functions. STAT_HACK is
2136	involved to preserve oneslot per name invariant. /*
2137	#define CLASSTYPE_MEMBER_VEC(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->members)
2138
2139	/ For class templates, this is a TREE_LIST of all member data,*
2140	functions, types, and friends in the order of declaration.
2141	The TREE_PURPOSE of each TREE_LIST is NULL_TREE for a friend,
2142	and the RECORD_TYPE for the class template otherwise. /*
2143	#define CLASSTYPE_DECL_LIST(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->decl_list)
2144
2145	/ A FUNCTION_DECL or OVERLOAD for the constructors for NODE. These*
2146	are the constructors that take an in-charge parameter. /*
2147	#define CLASSTYPE_CONSTRUCTORS(NODE) \
2148	(get_class_binding_direct (NODE, ctor_identifier))
2149
2150	/ A FUNCTION_DECL for the destructor for NODE. This is the*
2151	destructors that take an in-charge parameter. If
2152	CLASSTYPE_LAZY_DESTRUCTOR is true, then this entry will be NULL
2153	until the destructor is created with lazily_declare_fn. /*
2154	#define CLASSTYPE_DESTRUCTOR(NODE) \
2155	(get_class_binding_direct (NODE, dtor_identifier))
2156
2157	/ A dictionary of the nested user-defined-types (class-types, or enums)*
2158	found within this class. This table includes nested member class
2159	templates. /*
2160	#define CLASSTYPE_NESTED_UTDS(NODE) \
2161	(LANG_TYPE_CLASS_CHECK (NODE)->nested_udts)
2162
2163	/ Nonzero if NODE has a primary base class, i.e., a base class with*
2164	which it shares the virtual function table pointer. /*
2165	#define CLASSTYPE_HAS_PRIMARY_BASE_P(NODE) \
2166	(CLASSTYPE_PRIMARY_BINFO (NODE) != NULL_TREE)
2167
2168	/ If non-NULL, this is the binfo for the primary base class, i.e.,*
2169	the base class which contains the virtual function table pointer
2170	for this class. /*
2171	#define CLASSTYPE_PRIMARY_BINFO(NODE) \
2172	(LANG_TYPE_CLASS_CHECK (NODE)->primary_base)
2173
2174	/ A vector of BINFOs for the direct and indirect virtual base classes*
2175	that this type uses in a post-order depth-first left-to-right
2176	order. (In other words, these bases appear in the order that they
2177	should be initialized.) /*
2178	#define CLASSTYPE_VBASECLASSES(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->vbases)
2179
2180	/ The type corresponding to NODE when NODE is used as a base class,*
2181	i.e., NODE without virtual base classes or tail padding. /*
2182	#define CLASSTYPE_AS_BASE(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->as_base)
2183
2184	/ True iff NODE is the CLASSTYPE_AS_BASE version of some type. /
2185	#define IS_FAKE_BASE_TYPE(NODE) \
2186	(TREE_CODE (NODE) == RECORD_TYPE \
2187	&& TYPE_CONTEXT (NODE) && CLASS_TYPE_P (TYPE_CONTEXT (NODE)) \
2188	&& CLASSTYPE_AS_BASE (TYPE_CONTEXT (NODE)) == (NODE))
2189
2190	/ These are the size and alignment of the type without its virtual*
2191	base classes, for when we use this type as a base itself. /*
2192	#define CLASSTYPE_SIZE(NODE) TYPE_SIZE (CLASSTYPE_AS_BASE (NODE))
2193	#define CLASSTYPE_SIZE_UNIT(NODE) TYPE_SIZE_UNIT (CLASSTYPE_AS_BASE (NODE))
2194	#define CLASSTYPE_ALIGN(NODE) TYPE_ALIGN (CLASSTYPE_AS_BASE (NODE))
2195	#define CLASSTYPE_USER_ALIGN(NODE) TYPE_USER_ALIGN (CLASSTYPE_AS_BASE (NODE))
2196
2197	/ The alignment of NODE, without its virtual bases, in bytes. /
2198	#define CLASSTYPE_ALIGN_UNIT(NODE) \
2199	(CLASSTYPE_ALIGN (NODE) / BITS_PER_UNIT)
2200
2201	/ A vec<tree> of virtual functions which cannot be inherited by*
2202	derived classes. When deriving from this type, the derived
2203	class must provide its own definition for each of these functions. /*
2204	#define CLASSTYPE_PURE_VIRTUALS(NODE) \
2205	(LANG_TYPE_CLASS_CHECK (NODE)->pure_virtuals)
2206
2207	/ Nonzero means that this type is an abstract class type. /
2208	#define ABSTRACT_CLASS_TYPE_P(NODE) \
2209	(CLASS_TYPE_P (NODE) && CLASSTYPE_PURE_VIRTUALS(NODE))
2210
2211	/ Nonzero means that this type has an X() constructor. /
2212	#define TYPE_HAS_DEFAULT_CONSTRUCTOR(NODE) \
2213	(LANG_TYPE_CLASS_CHECK (NODE)->has_default_ctor)
2214
2215	/ Nonzero means that this type contains a mutable member. /
2216	#define CLASSTYPE_HAS_MUTABLE(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_mutable)
2217	#define TYPE_HAS_MUTABLE_P(NODE) (cp_has_mutable_p (NODE))
2218
2219	/ Nonzero means that this class type is not POD for the purpose of layout*
2220	(as defined in the ABI). This is different from the language's POD. /*
2221	#define CLASSTYPE_NON_LAYOUT_POD_P(NODE) \
2222	(LANG_TYPE_CLASS_CHECK (NODE)->non_pod_class)
2223
2224	/ Nonzero means that this class type is a non-standard-layout class. /
2225	#define CLASSTYPE_NON_STD_LAYOUT(NODE) \
2226	(LANG_TYPE_CLASS_CHECK (NODE)->non_std_layout)
2227
2228	/ Nonzero means that this class type does have unique object*
2229	representations. /*
2230	#define CLASSTYPE_UNIQUE_OBJ_REPRESENTATIONS(NODE) \
2231	(LANG_TYPE_CLASS_CHECK (NODE)->unique_obj_representations)
2232
2233	/ Nonzero means that this class type has*
2234	CLASSTYPE_UNIQUE_OBJ_REPRESENTATIONS computed. /*
2235	#define CLASSTYPE_UNIQUE_OBJ_REPRESENTATIONS_SET(NODE) \
2236	(LANG_TYPE_CLASS_CHECK (NODE)->unique_obj_representations_set)
2237
2238	/ Nonzero means that this class contains pod types whose default*
2239	initialization is not a zero initialization (namely, pointers to
2240	data members). /*
2241	#define CLASSTYPE_NON_ZERO_INIT_P(NODE) \
2242	(LANG_TYPE_CLASS_CHECK (NODE)->non_zero_init)
2243
2244	/ Nonzero if this class is "empty" in the sense of the C++ ABI. /
2245	#define CLASSTYPE_EMPTY_P(NODE) \
2246	(LANG_TYPE_CLASS_CHECK (NODE)->empty_p)
2247
2248	/ Nonzero if this class is "nearly empty", i.e., contains only a*
2249	virtual function table pointer. /*
2250	#define CLASSTYPE_NEARLY_EMPTY_P(NODE) \
2251	(LANG_TYPE_CLASS_CHECK (NODE)->nearly_empty_p)
2252
2253	/ Nonzero if this class contains an empty subobject. /
2254	#define CLASSTYPE_CONTAINS_EMPTY_CLASS_P(NODE) \
2255	(LANG_TYPE_CLASS_CHECK (NODE)->contains_empty_class_p)
2256
2257	/ A list of class types of which this type is a friend. The*
2258	TREE_VALUE is normally a TYPE, but will be a TEMPLATE_DECL in the
2259	case of a template friend. /*
2260	#define CLASSTYPE_FRIEND_CLASSES(NODE) \
2261	(LANG_TYPE_CLASS_CHECK (NODE)->friend_classes)
2262
2263	/ A list of the classes which grant friendship to this class. /
2264	#define CLASSTYPE_BEFRIENDING_CLASSES(NODE) \
2265	(LANG_TYPE_CLASS_CHECK (NODE)->befriending_classes)
2266
2267	/ The associated LAMBDA_EXPR that made this class. /
2268	#define CLASSTYPE_LAMBDA_EXPR(NODE) \
2269	(LANG_TYPE_CLASS_CHECK (NODE)->lambda_expr)
2270	/ The extra mangling scope for this closure type. /
2271	#define LAMBDA_TYPE_EXTRA_SCOPE(NODE) \
2272	(LAMBDA_EXPR_EXTRA_SCOPE (CLASSTYPE_LAMBDA_EXPR (NODE)))
2273
2274	/ Say whether this node was declared as a "class" or a "struct". /
2275	#define CLASSTYPE_DECLARED_CLASS(NODE) \
2276	(LANG_TYPE_CLASS_CHECK (NODE)->declared_class)
2277
2278	/ Nonzero if this class has const members*
2279	which have no specified initialization. /*
2280	#define CLASSTYPE_READONLY_FIELDS_NEED_INIT(NODE) \
2281	(TYPE_LANG_SPECIFIC (NODE) \
2282	? LANG_TYPE_CLASS_CHECK (NODE)->const_needs_init : 0)
2283	#define SET_CLASSTYPE_READONLY_FIELDS_NEED_INIT(NODE, VALUE) \
2284	(LANG_TYPE_CLASS_CHECK (NODE)->const_needs_init = (VALUE))
2285
2286	/ Nonzero if this class has ref members*
2287	which have no specified initialization. /*
2288	#define CLASSTYPE_REF_FIELDS_NEED_INIT(NODE) \
2289	(TYPE_LANG_SPECIFIC (NODE) \
2290	? LANG_TYPE_CLASS_CHECK (NODE)->ref_needs_init : 0)
2291	#define SET_CLASSTYPE_REF_FIELDS_NEED_INIT(NODE, VALUE) \
2292	(LANG_TYPE_CLASS_CHECK (NODE)->ref_needs_init = (VALUE))
2293
2294	/ Nonzero if this class is included from a header file which employs*
2295	`#pragma interface', and it is not included in its implementation file. /*
2296	#define CLASSTYPE_INTERFACE_ONLY(NODE) \
2297	(LANG_TYPE_CLASS_CHECK (NODE)->interface_only)
2298
2299	/ True if we have already determined whether or not vtables, VTTs,*
2300	typeinfo, and other similar per-class data should be emitted in
2301	this translation unit. This flag does not indicate whether or not
2302	these items should be emitted; it only indicates that we know one
2303	way or the other. /*
2304	#define CLASSTYPE_INTERFACE_KNOWN(NODE) \
2305	(LANG_TYPE_CLASS_CHECK (NODE)->interface_unknown == 0)
2306	/ The opposite of CLASSTYPE_INTERFACE_KNOWN. /
2307	#define CLASSTYPE_INTERFACE_UNKNOWN(NODE) \
2308	(LANG_TYPE_CLASS_CHECK (NODE)->interface_unknown)
2309
2310	#define SET_CLASSTYPE_INTERFACE_UNKNOWN_X(NODE,X) \
2311	(LANG_TYPE_CLASS_CHECK (NODE)->interface_unknown = !!(X))
2312	#define SET_CLASSTYPE_INTERFACE_UNKNOWN(NODE) \
2313	(LANG_TYPE_CLASS_CHECK (NODE)->interface_unknown = 1)
2314	#define SET_CLASSTYPE_INTERFACE_KNOWN(NODE) \
2315	(LANG_TYPE_CLASS_CHECK (NODE)->interface_unknown = 0)
2316
2317	/ Nonzero if a _DECL node requires us to output debug info for this class. /
2318	#define CLASSTYPE_DEBUG_REQUESTED(NODE) \
2319	(LANG_TYPE_CLASS_CHECK (NODE)->debug_requested)
2320
2321	/ Additional macros for inheritance information. /
2322
2323	/ Nonzero means that this class is on a path leading to a new vtable. /
2324	#define BINFO_VTABLE_PATH_MARKED(NODE) BINFO_FLAG_1 (NODE)
2325
2326	/ Nonzero means B (a BINFO) has its own vtable. Any copies will not*
2327	have this flag set. /*
2328	#define BINFO_NEW_VTABLE_MARKED(B) (BINFO_FLAG_2 (B))
2329
2330	/ Compare a BINFO_TYPE with another type for equality. For a binfo,*
2331	this is functionally equivalent to using same_type_p, but
2332	measurably faster. At least one of the arguments must be a
2333	BINFO_TYPE. The other can be a BINFO_TYPE or a regular type. If
2334	BINFO_TYPE(T) ever stops being the main variant of the class the
2335	binfo is for, this macro must change. /*
2336	#define SAME_BINFO_TYPE_P(A, B) ((A) == (B))
2337
2338	/ Any subobject that needs a new vtable must have a vptr and must not*
2339	be a non-virtual primary base (since it would then use the vtable from a
2340	derived class and never become non-primary.) /*
2341	#define SET_BINFO_NEW_VTABLE_MARKED(B) \
2342	(BINFO_NEW_VTABLE_MARKED (B) = 1, \
2343	gcc_assert (!BINFO_PRIMARY_P (B) \|\| BINFO_VIRTUAL_P (B)), \
2344	gcc_assert (TYPE_VFIELD (BINFO_TYPE (B))))
2345
2346	/ Nonzero if this binfo is for a dependent base - one that should not*
2347	be searched. /*
2348	#define BINFO_DEPENDENT_BASE_P(NODE) BINFO_FLAG_3 (NODE)
2349
2350	/ Nonzero if this binfo has lost its primary base binfo (because that*
2351	is a nearly-empty virtual base that has been taken by some other
2352	base in the complete hierarchy. /*
2353	#define BINFO_LOST_PRIMARY_P(NODE) BINFO_FLAG_4 (NODE)
2354
2355	/ Nonzero if this BINFO is a primary base class. /
2356	#define BINFO_PRIMARY_P(NODE) BINFO_FLAG_5(NODE)
2357
2358	/ A vec<tree_pair_s> of the vcall indices associated with the class*
2359	NODE. The PURPOSE of each element is a FUNCTION_DECL for a virtual
2360	function. The VALUE is the index into the virtual table where the
2361	vcall offset for that function is stored, when NODE is a virtual
2362	base. /*
2363	#define CLASSTYPE_VCALL_INDICES(NODE) \
2364	(LANG_TYPE_CLASS_CHECK (NODE)->vcall_indices)
2365
2366	/ The various vtables for the class NODE. The primary vtable will be*
2367	first, followed by the construction vtables and VTT, if any. /*
2368	#define CLASSTYPE_VTABLES(NODE) \
2369	(LANG_TYPE_CLASS_CHECK (NODE)->vtables)
2370
2371	/ The std::type_info variable representing this class, or NULL if no*
2372	such variable has been created. This field is only set for the
2373	TYPE_MAIN_VARIANT of the class. /*
2374	#define CLASSTYPE_TYPEINFO_VAR(NODE) \
2375	(LANG_TYPE_CLASS_CHECK (NODE)->typeinfo_var)
2376
2377	/ Accessor macros for the BINFO_VIRTUALS list. /
2378
2379	/ The number of bytes by which to adjust the `this' pointer when*
2380	calling this virtual function. Subtract this value from the this
2381	pointer. Always non-NULL, might be constant zero though. /*
2382	#define BV_DELTA(NODE) (TREE_PURPOSE (NODE))
2383
2384	/ If non-NULL, the vtable index at which to find the vcall offset*
2385	when calling this virtual function. Add the value at that vtable
2386	index to the this pointer. /*
2387	#define BV_VCALL_INDEX(NODE) (TREE_TYPE (NODE))
2388
2389	/ The function to call. /
2390	#define BV_FN(NODE) (TREE_VALUE (NODE))
2391
2392	/ Whether or not this entry is for a lost primary virtual base. /
2393	#define BV_LOST_PRIMARY(NODE) (TREE_LANG_FLAG_0 (NODE))
2394
2395	/ For FUNCTION_TYPE or METHOD_TYPE, a list of the exceptions that*
2396	this type can raise. Each TREE_VALUE is a _TYPE. The TREE_VALUE
2397	will be NULL_TREE to indicate a throw specification of `()', or
2398	no exceptions allowed. For a noexcept specification, TREE_VALUE
2399	is NULL_TREE and TREE_PURPOSE is the constant-expression. For
2400	a deferred noexcept-specification, TREE_PURPOSE is a DEFERRED_NOEXCEPT
2401	(for templates) or an OVERLOAD list of functions (for implicitly
2402	declared functions). /*
2403	#define TYPE_RAISES_EXCEPTIONS(NODE) \
2404	TYPE_LANG_SLOT_1 (FUNC_OR_METHOD_CHECK (NODE))
2405
2406	/ For FUNCTION_TYPE or METHOD_TYPE, return 1 iff it is declared `throw()'*
2407	or noexcept(true). /*
2408	#define TYPE_NOTHROW_P(NODE) nothrow_spec_p (TYPE_RAISES_EXCEPTIONS (NODE))
2409
2410	/ For FUNCTION_TYPE or METHOD_TYPE, true if NODE is noexcept. This is the*
2411	case for things declared noexcept(true) and, with -fnothrow-opt, for
2412	throw() functions. /*
2413	#define TYPE_NOEXCEPT_P(NODE) type_noexcept_p (NODE)
2414
2415	/ The binding level associated with the namespace. /
2416	#define NAMESPACE_LEVEL(NODE) \
2417	(LANG_DECL_NS_CHECK (NODE)->level)
2418
2419	/ Discriminator values for lang_decl. /
2420
2421	enum lang_decl_selector
2422	{
2423	lds_min,
2424	lds_fn,
2425	lds_ns,
2426	lds_parm,
2427	lds_decomp
2428	};
2429
2430	/ Flags shared by all forms of DECL_LANG_SPECIFIC.*
2431
2432	Some of the flags live here only to make lang_decl_min/fn smaller. Do
2433	not make this struct larger than 32 bits; instead, make sel smaller. /*
2434
2435	struct GTY(()) lang_decl_base {
2436	/ Larger than necessary for faster access. /
2437	ENUM_BITFIELD(lang_decl_selector) selector : `16`;
2438	ENUM_BITFIELD(languages) language : `1`;
2439	unsigned use_template : `2`;
2440	unsigned not_really_extern : `1`; / var or fn /
2441	unsigned initialized_in_class : `1`; / var or fn /
2442	unsigned repo_available_p : `1`; / var or fn /
2443	unsigned threadprivate_or_deleted_p : `1`; / var or fn /
2444	unsigned anticipated_p : `1`; / fn, type or template /
2445	/ anticipated_p reused as DECL_OMP_PRIVATIZED_MEMBER in var /
2446	unsigned friend_or_tls : `1`; / var, fn, type or template /
2447	unsigned unknown_bound_p : `1`; / var /
2448	unsigned odr_used : `1`; / var or fn /
2449	unsigned u2sel : `1`;
2450	unsigned concept_p : `1`; / applies to vars and functions /
2451	unsigned var_declared_inline_p : `1`; / var /
2452	unsigned dependent_init_p : `1`; / var /
2453	/ 1 spare bit /
2454	};
2455
2456	/ True for DECL codes which have template info and access. /
2457	#define LANG_DECL_HAS_MIN(NODE) \
2458	(VAR_OR_FUNCTION_DECL_P (NODE) \
2459	\|\| TREE_CODE (NODE) == FIELD_DECL \
2460	\|\| TREE_CODE (NODE) == CONST_DECL \
2461	\|\| TREE_CODE (NODE) == TYPE_DECL \
2462	\|\| TREE_CODE (NODE) == TEMPLATE_DECL \
2463	\|\| TREE_CODE (NODE) == USING_DECL)
2464
2465	/ DECL_LANG_SPECIFIC for the above codes. /
2466
2467	struct GTY(()) lang_decl_min {
2468	struct lang_decl_base base;
2469
2470	/ In a FUNCTION_DECL for which DECL_THUNK_P holds, this is*
2471	THUNK_ALIAS.
2472	In a FUNCTION_DECL for which DECL_THUNK_P does not hold,
2473	VAR_DECL, TYPE_DECL, or TEMPLATE_DECL, this is
2474	DECL_TEMPLATE_INFO. /*
2475	tree template_info;
2476
2477	union lang_decl_u2 {
2478	/ In a FUNCTION_DECL for which DECL_THUNK_P holds, this is*
2479	THUNK_VIRTUAL_OFFSET.
2480	In a VAR_DECL for which DECL_HAS_VALUE_EXPR_P holds,
2481	this is DECL_CAPTURED_VARIABLE.
2482	Otherwise this is DECL_ACCESS. /*
2483	tree GTY ((tag ("0"))) access;
2484
2485	/ For TREE_STATIC VAR_DECL in function, this is DECL_DISCRIMINATOR. /
2486	int GTY ((tag ("1"))) discriminator;
2487	} GTY ((desc ("%0.u.base.u2sel"))) u2;
2488	};
2489
2490	/ Additional DECL_LANG_SPECIFIC information for functions. /
2491
2492	struct GTY(()) lang_decl_fn {
2493	struct lang_decl_min min;
2494
2495	/ In a overloaded operator, this is the compressed operator code. /
2496	unsigned ovl_op_code : `6`;
2497	unsigned global_ctor_p : `1`;
2498	unsigned global_dtor_p : `1`;
2499
2500	unsigned static_function : `1`;
2501	unsigned pure_virtual : `1`;
2502	unsigned defaulted_p : `1`;
2503	unsigned has_in_charge_parm_p : `1`;
2504	unsigned has_vtt_parm_p : `1`;
2505	unsigned pending_inline_p : `1`;
2506	unsigned nonconverting : `1`;
2507	unsigned thunk_p : `1`;
2508
2509	unsigned this_thunk_p : `1`;
2510	unsigned hidden_friend_p : `1`;
2511	unsigned omp_declare_reduction_p : `1`;
2512	unsigned spare : `13`;
2513
2514	/ 32-bits padding on 64-bit host. /
2515
2516	/ For a non-thunk function decl, this is a tree list of*
2517	friendly classes. For a thunk function decl, it is the
2518	thunked to function decl. /*
2519	tree befriending_classes;
2520
2521	/ For a non-virtual FUNCTION_DECL, this is*
2522	DECL_FRIEND_CONTEXT. For a virtual FUNCTION_DECL for which
2523	DECL_THIS_THUNK_P does not hold, this is DECL_THUNKS. Both
2524	this pointer and result pointer adjusting thunks are
2525	chained here. This pointer thunks to return pointer thunks
2526	will be chained on the return pointer thunk. /*
2527	tree context;
2528
2529	union lang_decl_u5
2530	{
2531	/ In a non-thunk FUNCTION_DECL or TEMPLATE_DECL, this is*
2532	DECL_CLONED_FUNCTION. /*
2533	tree GTY ((tag ("0"))) cloned_function;
2534
2535	/ In a FUNCTION_DECL for which THUNK_P holds this is the*
2536	THUNK_FIXED_OFFSET. /*
2537	HOST_WIDE_INT GTY ((tag ("1"))) fixed_offset;
2538	} GTY ((desc ("%1.thunk_p"))) u5;
2539
2540	union lang_decl_u3
2541	{
2542	struct cp_token_cache * GTY ((tag ("1"))) pending_inline_info;
2543	struct language_function * GTY ((tag ("0")))
2544	saved_language_function;
2545	} GTY ((desc ("%1.pending_inline_p"))) u;
2546
2547	};
2548
2549	/ DECL_LANG_SPECIFIC for namespaces. /
2550
2551	struct GTY(()) lang_decl_ns {
2552	struct lang_decl_base base;
2553	cp_binding_level *level;
2554
2555	/ using directives and inline children. These need to be va_gc,*
2556	because of PCH. /*
2557	vec<tree, va_gc> *usings;
2558	vec<tree, va_gc> *inlinees;
2559
2560	/ Hash table of bound decls. It'd be nice to have this inline, but*
2561	as the hash_map has a dtor, we can't then put this struct into a
2562	union (until moving to c++11). /*
2563	hash_table<named_decl_hash> *bindings;
2564	};
2565
2566	/ DECL_LANG_SPECIFIC for parameters. /
2567
2568	struct GTY(()) lang_decl_parm {
2569	struct lang_decl_base base;
2570	int level;
2571	int index;
2572	};
2573
2574	/ Additional DECL_LANG_SPECIFIC information for structured bindings. /
2575
2576	struct GTY(()) lang_decl_decomp {
2577	struct lang_decl_min min;
2578	/ The artificial underlying "e" variable of the structured binding*
2579	variable. /*
2580	tree base;
2581	};
2582
2583	/ DECL_LANG_SPECIFIC for all types. It would be nice to just make this a*
2584	union rather than a struct containing a union as its only field, but
2585	tree.h declares it as a struct. /*
2586
2587	struct GTY(()) lang_decl {
2588	union GTY((desc ("%h.base.selector"))) lang_decl_u {
2589	/ Nothing of only the base type exists. /
2590	struct lang_decl_base GTY ((default)) base;
2591	struct lang_decl_min GTY((tag ("lds_min"))) min;
2592	struct lang_decl_fn GTY ((tag ("lds_fn"))) fn;
2593	struct lang_decl_ns GTY((tag ("lds_ns"))) ns;
2594	struct lang_decl_parm GTY((tag ("lds_parm"))) parm;
2595	struct lang_decl_decomp GTY((tag ("lds_decomp"))) decomp;
2596	} u;
2597	};
2598
2599	/ Looks through a template (if present) to find what it declares. /
2600	#define STRIP_TEMPLATE(NODE) \
2601	(TREE_CODE (NODE) == TEMPLATE_DECL ? DECL_TEMPLATE_RESULT (NODE) : NODE)
2602
2603	#if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007)
2604
2605	#define LANG_DECL_MIN_CHECK(NODE) __extension__ \
2606	({ struct lang_decl *lt = DECL_LANG_SPECIFIC (NODE); \
2607	if (!LANG_DECL_HAS_MIN (NODE)) \
2608	lang_check_failed (__FILE__, __LINE__, __FUNCTION__); \
2609	&lt->u.min; })
2610
2611	/ We want to be able to check DECL_CONSTRUCTOR_P and such on a function*
2612	template, not just on a FUNCTION_DECL. So when looking for things in
2613	lang_decl_fn, look down through a TEMPLATE_DECL into its result. /*
2614	#define LANG_DECL_FN_CHECK(NODE) __extension__ \
2615	({ struct lang_decl *lt = DECL_LANG_SPECIFIC (STRIP_TEMPLATE (NODE)); \
2616	if (!DECL_DECLARES_FUNCTION_P (NODE) \
2617	\|\| lt->u.base.selector != lds_fn) \
2618	lang_check_failed (__FILE__, __LINE__, __FUNCTION__); \
2619	&lt->u.fn; })
2620
2621	#define LANG_DECL_NS_CHECK(NODE) __extension__ \
2622	({ struct lang_decl *lt = DECL_LANG_SPECIFIC (NODE); \
2623	if (TREE_CODE (NODE) != NAMESPACE_DECL \
2624	\|\| lt->u.base.selector != lds_ns) \
2625	lang_check_failed (__FILE__, __LINE__, __FUNCTION__); \
2626	&lt->u.ns; })
2627
2628	#define LANG_DECL_PARM_CHECK(NODE) __extension__ \
2629	({ struct lang_decl *lt = DECL_LANG_SPECIFIC (NODE); \
2630	if (TREE_CODE (NODE) != PARM_DECL \
2631	\|\| lt->u.base.selector != lds_parm) \
2632	lang_check_failed (__FILE__, __LINE__, __FUNCTION__); \
2633	&lt->u.parm; })
2634
2635	#define LANG_DECL_DECOMP_CHECK(NODE) __extension__ \
2636	({ struct lang_decl *lt = DECL_LANG_SPECIFIC (NODE); \
2637	if (!VAR_P (NODE) \
2638	\|\| lt->u.base.selector != lds_decomp) \
2639	lang_check_failed (__FILE__, __LINE__, __FUNCTION__); \
2640	&lt->u.decomp; })
2641
2642	#define LANG_DECL_U2_CHECK(NODE, TF) __extension__ \
2643	({ struct lang_decl *lt = DECL_LANG_SPECIFIC (NODE); \
2644	if (!LANG_DECL_HAS_MIN (NODE) \|\| lt->u.base.u2sel != TF) \
2645	lang_check_failed (__FILE__, __LINE__, __FUNCTION__); \
2646	&lt->u.min.u2; })
2647
2648	#else
2649
2650	#define LANG_DECL_MIN_CHECK(NODE) \
2651	(&DECL_LANG_SPECIFIC (NODE)->u.min)
2652
2653	#define LANG_DECL_FN_CHECK(NODE) \
2654	(&DECL_LANG_SPECIFIC (STRIP_TEMPLATE (NODE))->u.fn)
2655
2656	#define LANG_DECL_NS_CHECK(NODE) \
2657	(&DECL_LANG_SPECIFIC (NODE)->u.ns)
2658
2659	#define LANG_DECL_PARM_CHECK(NODE) \
2660	(&DECL_LANG_SPECIFIC (NODE)->u.parm)
2661
2662	#define LANG_DECL_DECOMP_CHECK(NODE) \
2663	(&DECL_LANG_SPECIFIC (NODE)->u.decomp)
2664
2665	#define LANG_DECL_U2_CHECK(NODE, TF) \
2666	(&DECL_LANG_SPECIFIC (NODE)->u.min.u2)
2667
2668	#endif /* ENABLE_TREE_CHECKING */
2669
2670	/ For a FUNCTION_DECL or a VAR_DECL, the language linkage for the*
2671	declaration. Some entities (like a member function in a local
2672	class, or a local variable) do not have linkage at all, and this
2673	macro should not be used in those cases.
2674
2675	Implementation note: A FUNCTION_DECL without DECL_LANG_SPECIFIC was
2676	created by language-independent code, and has C linkage. Most
2677	VAR_DECLs have C++ linkage, and do not have DECL_LANG_SPECIFIC, but
2678	we do create DECL_LANG_SPECIFIC for variables with non-C++ linkage. /*
2679	#define DECL_LANGUAGE(NODE) \
2680	(DECL_LANG_SPECIFIC (NODE) \
2681	? DECL_LANG_SPECIFIC (NODE)->u.base.language \
2682	: (TREE_CODE (NODE) == FUNCTION_DECL \
2683	? lang_c : lang_cplusplus))
2684
2685	/ Set the language linkage for NODE to LANGUAGE. /
2686	#define SET_DECL_LANGUAGE(NODE, LANGUAGE) \
2687	(DECL_LANG_SPECIFIC (NODE)->u.base.language = (LANGUAGE))
2688
2689	/ For FUNCTION_DECLs and TEMPLATE_DECLs: nonzero means that this function*
2690	is a constructor. /*
2691	#define DECL_CONSTRUCTOR_P(NODE) \
2692	IDENTIFIER_CTOR_P (DECL_NAME (NODE))
2693
2694	/ Nonzero if NODE (a FUNCTION_DECL) is a constructor for a complete*
2695	object. /*
2696	#define DECL_COMPLETE_CONSTRUCTOR_P(NODE) \
2697	(DECL_NAME (NODE) == complete_ctor_identifier)
2698
2699	/ Nonzero if NODE (a FUNCTION_DECL) is a constructor for a base*
2700	object. /*
2701	#define DECL_BASE_CONSTRUCTOR_P(NODE) \
2702	(DECL_NAME (NODE) == base_ctor_identifier)
2703
2704	/ Nonzero if NODE (a FUNCTION_DECL) is a constructor, but not either the*
2705	specialized in-charge constructor or the specialized not-in-charge
2706	constructor. /*
2707	#define DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P(NODE) \
2708	(DECL_NAME (NODE) == ctor_identifier)
2709
2710	/ Nonzero if NODE (a FUNCTION_DECL) is a copy constructor. /
2711	#define DECL_COPY_CONSTRUCTOR_P(NODE) \
2712	(DECL_CONSTRUCTOR_P (NODE) && copy_fn_p (NODE) > 0)
2713
2714	/ Nonzero if NODE (a FUNCTION_DECL) is a move constructor. /
2715	#define DECL_MOVE_CONSTRUCTOR_P(NODE) \
2716	(DECL_CONSTRUCTOR_P (NODE) && move_fn_p (NODE))
2717
2718	/ Nonzero if NODE (a FUNCTION_DECL or TEMPLATE_DECL)*
2719	is a destructor. /*
2720	#define DECL_DESTRUCTOR_P(NODE) \
2721	IDENTIFIER_DTOR_P (DECL_NAME (NODE))
2722
2723	/ Nonzero if NODE (a FUNCTION_DECL) is a destructor, but not the*
2724	specialized in-charge constructor, in-charge deleting constructor,
2725	or the base destructor. /*
2726	#define DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P(NODE) \
2727	(DECL_NAME (NODE) == dtor_identifier)
2728
2729	/ Nonzero if NODE (a FUNCTION_DECL) is a destructor for a complete*
2730	object. /*
2731	#define DECL_COMPLETE_DESTRUCTOR_P(NODE) \
2732	(DECL_NAME (NODE) == complete_dtor_identifier)
2733
2734	/ Nonzero if NODE (a FUNCTION_DECL) is a destructor for a base*
2735	object. /*
2736	#define DECL_BASE_DESTRUCTOR_P(NODE) \
2737	(DECL_NAME (NODE) == base_dtor_identifier)
2738
2739	/ Nonzero if NODE (a FUNCTION_DECL) is a destructor for a complete*
2740	object that deletes the object after it has been destroyed. /*
2741	#define DECL_DELETING_DESTRUCTOR_P(NODE) \
2742	(DECL_NAME (NODE) == deleting_dtor_identifier)
2743
2744	/ Nonzero if NODE (a FUNCTION_DECL) is a cloned constructor or*
2745	destructor. /*
2746	#define DECL_CLONED_FUNCTION_P(NODE) (!!decl_cloned_function_p (NODE, true))
2747
2748	/ If DECL_CLONED_FUNCTION_P holds, this is the function that was*
2749	cloned. /*
2750	#define DECL_CLONED_FUNCTION(NODE) (*decl_cloned_function_p (NODE, false))
2751
2752	/ Perform an action for each clone of FN, if FN is a function with*
2753	clones. This macro should be used like:
2754
2755	FOR_EACH_CLONE (clone, fn)
2756	{ ... }
2757
2758	*/
2759	#define FOR_EACH_CLONE(CLONE, FN) \
2760	if (!(TREE_CODE (FN) == FUNCTION_DECL \
2761	&& (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (FN) \
2762	\|\| DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (FN))))\
2763	; \
2764	else \
2765	for (CLONE = DECL_CHAIN (FN); \
2766	CLONE && DECL_CLONED_FUNCTION_P (CLONE); \
2767	CLONE = DECL_CHAIN (CLONE))
2768
2769	/ Nonzero if NODE has DECL_DISCRIMINATOR and not DECL_ACCESS. /
2770	#define DECL_DISCRIMINATOR_P(NODE) \
2771	(VAR_P (NODE) && DECL_FUNCTION_SCOPE_P (NODE))
2772
2773	/ Discriminator for name mangling. /
2774	#define DECL_DISCRIMINATOR(NODE) (LANG_DECL_U2_CHECK (NODE, 1)->discriminator)
2775
2776	/ True iff DECL_DISCRIMINATOR is set for a DECL_DISCRIMINATOR_P decl. /
2777	#define DECL_DISCRIMINATOR_SET_P(NODE) \
2778	(DECL_LANG_SPECIFIC (NODE) && DECL_LANG_SPECIFIC (NODE)->u.base.u2sel == 1)
2779
2780	/ The index of a user-declared parameter in its function, starting at 1.*
2781	All artificial parameters will have index 0. /*
2782	#define DECL_PARM_INDEX(NODE) \
2783	(LANG_DECL_PARM_CHECK (NODE)->index)
2784
2785	/ The level of a user-declared parameter in its function, starting at 1.*
2786	A parameter of the function will have level 1; a parameter of the first
2787	nested function declarator (i.e. t in void f (void (p)(T t))) will have*
2788	level 2. /*
2789	#define DECL_PARM_LEVEL(NODE) \
2790	(LANG_DECL_PARM_CHECK (NODE)->level)
2791
2792	/ Nonzero if the VTT parm has been added to NODE. /
2793	#define DECL_HAS_VTT_PARM_P(NODE) \
2794	(LANG_DECL_FN_CHECK (NODE)->has_vtt_parm_p)
2795
2796	/ Nonzero if NODE is a FUNCTION_DECL for which a VTT parameter is*
2797	required. /*
2798	#define DECL_NEEDS_VTT_PARM_P(NODE) \
2799	(CLASSTYPE_VBASECLASSES (DECL_CONTEXT (NODE)) \
2800	&& (DECL_BASE_CONSTRUCTOR_P (NODE) \
2801	\|\| DECL_BASE_DESTRUCTOR_P (NODE)))
2802
2803	/ Nonzero if NODE is a user-defined conversion operator. /
2804	#define DECL_CONV_FN_P(NODE) IDENTIFIER_CONV_OP_P (DECL_NAME (NODE))
2805
2806	/ The type to which conversion operator FN converts to. /
2807	#define DECL_CONV_FN_TYPE(FN) \
2808	TREE_TYPE ((gcc_checking_assert (DECL_CONV_FN_P (FN)), DECL_NAME (FN)))
2809
2810	/ Nonzero if NODE, a static data member, was declared in its class as an*
2811	array of unknown bound. /*
2812	#define VAR_HAD_UNKNOWN_BOUND(NODE) \
2813	(DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE)) \
2814	? DECL_LANG_SPECIFIC (NODE)->u.base.unknown_bound_p \
2815	: false)
2816	#define SET_VAR_HAD_UNKNOWN_BOUND(NODE) \
2817	(DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE))->u.base.unknown_bound_p = true)
2818
2819	/ True iff decl NODE is for an overloaded operator. /
2820	#define DECL_OVERLOADED_OPERATOR_P(NODE) \
2821	IDENTIFIER_ANY_OP_P (DECL_NAME (NODE))
2822
2823	/ Nonzero if NODE is an assignment operator (including += and such). /
2824	#define DECL_ASSIGNMENT_OPERATOR_P(NODE) \
2825	IDENTIFIER_ASSIGN_OP_P (DECL_NAME (NODE))
2826
2827	/ NODE is a function_decl for an overloaded operator. Return its*
2828	compressed (raw) operator code. Note that this is not a TREE_CODE. /*
2829	#define DECL_OVERLOADED_OPERATOR_CODE_RAW(NODE) \
2830	(LANG_DECL_FN_CHECK (NODE)->ovl_op_code)
2831
2832	/ DECL is an overloaded operator. Test whether it is for TREE_CODE*
2833	(a literal constant). /*
2834	#define DECL_OVERLOADED_OPERATOR_IS(DECL, CODE) \
2835	(DECL_OVERLOADED_OPERATOR_CODE_RAW (DECL) == OVL_OP_##CODE)
2836
2837	/ For FUNCTION_DECLs: nonzero means that this function is a*
2838	constructor or a destructor with an extra in-charge parameter to
2839	control whether or not virtual bases are constructed. /*
2840	#define DECL_HAS_IN_CHARGE_PARM_P(NODE) \
2841	(LANG_DECL_FN_CHECK (NODE)->has_in_charge_parm_p)
2842
2843	/ Nonzero if DECL is a declaration of __builtin_constant_p. /
2844	#define DECL_IS_BUILTIN_CONSTANT_P(NODE) \
2845	(TREE_CODE (NODE) == FUNCTION_DECL \
2846	&& DECL_BUILT_IN_CLASS (NODE) == BUILT_IN_NORMAL \
2847	&& DECL_FUNCTION_CODE (NODE) == BUILT_IN_CONSTANT_P)
2848
2849	/ Nonzero for _DECL means that this decl appears in (or will appear*
2850	in) as a member in a RECORD_TYPE or UNION_TYPE node. It is also for
2851	detecting circularity in case members are multiply defined. In the
2852	case of a VAR_DECL, it is also used to determine how program storage
2853	should be allocated. /*
2854	#define DECL_IN_AGGR_P(NODE) (DECL_LANG_FLAG_3 (NODE))
2855
2856	/ Nonzero for a VAR_DECL means that the variable's initialization (if*
2857	any) has been processed. (In general, DECL_INITIALIZED_P is
2858	!DECL_EXTERNAL, but static data members may be initialized even if
2859	not defined.) /*
2860	#define DECL_INITIALIZED_P(NODE) \
2861	(TREE_LANG_FLAG_1 (VAR_DECL_CHECK (NODE)))
2862
2863	/ Nonzero for a VAR_DECL iff an explicit initializer was provided*
2864	or a non-trivial constructor is called. /*
2865	#define DECL_NONTRIVIALLY_INITIALIZED_P(NODE) \
2866	(TREE_LANG_FLAG_3 (VAR_DECL_CHECK (NODE)))
2867
2868	/ Nonzero for a VAR_DECL that was initialized with a*
2869	constant-expression. /*
2870	#define DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P(NODE) \
2871	(TREE_LANG_FLAG_2 (VAR_DECL_CHECK (NODE)))
2872
2873	/ Nonzero if the DECL was initialized in the class definition itself,*
2874	rather than outside the class. This is used for both static member
2875	VAR_DECLS, and FUNCTION_DECLS that are defined in the class. /*
2876	#define DECL_INITIALIZED_IN_CLASS_P(DECL) \
2877	(DECL_LANG_SPECIFIC (VAR_OR_FUNCTION_DECL_CHECK (DECL)) \
2878	->u.base.initialized_in_class)
2879
2880	/ Nonzero if the DECL is used in the sense of 3.2 [basic.def.odr].*
2881	Only available for decls with DECL_LANG_SPECIFIC. /*
2882	#define DECL_ODR_USED(DECL) \
2883	(DECL_LANG_SPECIFIC (VAR_OR_FUNCTION_DECL_CHECK (DECL)) \
2884	->u.base.odr_used)
2885
2886	/ Nonzero for DECL means that this decl is just a friend declaration,*
2887	and should not be added to the list of members for this class. /*
2888	#define DECL_FRIEND_P(NODE) \
2889	(DECL_LANG_SPECIFIC (TYPE_FUNCTION_OR_TEMPLATE_DECL_CHECK (NODE)) \
2890	->u.base.friend_or_tls)
2891
2892	/ Nonzero if the thread-local variable was declared with __thread as*
2893	opposed to thread_local. /*
2894	#define DECL_GNU_TLS_P(NODE) \
2895	(DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE)) \
2896	&& DECL_LANG_SPECIFIC (NODE)->u.base.friend_or_tls)
2897	#define SET_DECL_GNU_TLS_P(NODE) \
2898	(retrofit_lang_decl (VAR_DECL_CHECK (NODE)), \
2899	DECL_LANG_SPECIFIC (NODE)->u.base.friend_or_tls = true)
2900
2901	/ A TREE_LIST of the types which have befriended this FUNCTION_DECL. /
2902	#define DECL_BEFRIENDING_CLASSES(NODE) \
2903	(LANG_DECL_FN_CHECK (NODE)->befriending_classes)
2904
2905	/ Nonzero for FUNCTION_DECL means that this decl is a static*
2906	member function. /*
2907	#define DECL_STATIC_FUNCTION_P(NODE) \
2908	(LANG_DECL_FN_CHECK (NODE)->static_function)
2909
2910	/ Nonzero for FUNCTION_DECL means that this decl is a non-static*
2911	member function. /*
2912	#define DECL_NONSTATIC_MEMBER_FUNCTION_P(NODE) \
2913	(TREE_CODE (TREE_TYPE (NODE)) == METHOD_TYPE)
2914
2915	/ Nonzero for FUNCTION_DECL means that this decl is a member function*
2916	(static or non-static). /*
2917	#define DECL_FUNCTION_MEMBER_P(NODE) \
2918	(DECL_NONSTATIC_MEMBER_FUNCTION_P (NODE) \|\| DECL_STATIC_FUNCTION_P (NODE))
2919
2920	/ Nonzero for FUNCTION_DECL means that this member function*
2921	has `this' as const X const. /
2922	#define DECL_CONST_MEMFUNC_P(NODE) \
2923	(DECL_NONSTATIC_MEMBER_FUNCTION_P (NODE) \
2924	&& CP_TYPE_CONST_P (TREE_TYPE (TREE_VALUE \
2925	(TYPE_ARG_TYPES (TREE_TYPE (NODE))))))
2926
2927	/ Nonzero for FUNCTION_DECL means that this member function*
2928	has `this' as volatile X const. /
2929	#define DECL_VOLATILE_MEMFUNC_P(NODE) \
2930	(DECL_NONSTATIC_MEMBER_FUNCTION_P (NODE) \
2931	&& CP_TYPE_VOLATILE_P (TREE_TYPE (TREE_VALUE \
2932	(TYPE_ARG_TYPES (TREE_TYPE (NODE))))))
2933
2934	/ Nonzero for a DECL means that this member is a non-static member. /
2935	#define DECL_NONSTATIC_MEMBER_P(NODE) \
2936	(DECL_NONSTATIC_MEMBER_FUNCTION_P (NODE) \
2937	\|\| TREE_CODE (NODE) == FIELD_DECL)
2938
2939	/ Nonzero for _DECL means that this member object type*
2940	is mutable. /*
2941	#define DECL_MUTABLE_P(NODE) (DECL_LANG_FLAG_0 (NODE))
2942
2943	/ Nonzero for _DECL means that this constructor or conversion function is*
2944	non-converting. /*
2945	#define DECL_NONCONVERTING_P(NODE) \
2946	(LANG_DECL_FN_CHECK (NODE)->nonconverting)
2947
2948	/ Nonzero for FUNCTION_DECL means that this member function is a pure*
2949	virtual function. /*
2950	#define DECL_PURE_VIRTUAL_P(NODE) \
2951	(LANG_DECL_FN_CHECK (NODE)->pure_virtual)
2952
2953	/ True (in a FUNCTION_DECL) if NODE is a virtual function that is an*
2954	invalid overrider for a function from a base class. Once we have
2955	complained about an invalid overrider we avoid complaining about it
2956	again. /*
2957	#define DECL_INVALID_OVERRIDER_P(NODE) \
2958	(DECL_LANG_FLAG_4 (NODE))
2959
2960	/ True (in a FUNCTION_DECL) if NODE is a function declared with*
2961	an override virt-specifier /*
2962	#define DECL_OVERRIDE_P(NODE) (TREE_LANG_FLAG_0 (NODE))
2963
2964	/ The thunks associated with NODE, a FUNCTION_DECL. /
2965	#define DECL_THUNKS(NODE) \
2966	(DECL_VIRTUAL_P (NODE) ? LANG_DECL_FN_CHECK (NODE)->context : NULL_TREE)
2967
2968	/ Set DECL_THUNKS. /
2969	#define SET_DECL_THUNKS(NODE,THUNKS) \
2970	(LANG_DECL_FN_CHECK (NODE)->context = (THUNKS))
2971
2972	/ If NODE, a FUNCTION_DECL, is a C++11 inheriting constructor, then this*
2973	is the constructor it inherits from. /*
2974	#define DECL_INHERITED_CTOR(NODE) \
2975	(DECL_DECLARES_FUNCTION_P (NODE) && DECL_CONSTRUCTOR_P (NODE) \
2976	? LANG_DECL_FN_CHECK (NODE)->context : NULL_TREE)
2977
2978	/ And this is the base that constructor comes from. /
2979	#define DECL_INHERITED_CTOR_BASE(NODE) \
2980	(DECL_INHERITED_CTOR (NODE) \
2981	? DECL_CONTEXT (flag_new_inheriting_ctors \
2982	? strip_inheriting_ctors (NODE) \
2983	: DECL_INHERITED_CTOR (NODE)) \
2984	: NULL_TREE)
2985
2986	/ Set the inherited base. /
2987	#define SET_DECL_INHERITED_CTOR(NODE,INH) \
2988	(LANG_DECL_FN_CHECK (NODE)->context = (INH))
2989
2990	/ Nonzero if NODE is a thunk, rather than an ordinary function. /
2991	#define DECL_THUNK_P(NODE) \
2992	(TREE_CODE (NODE) == FUNCTION_DECL \
2993	&& DECL_LANG_SPECIFIC (NODE) \
2994	&& LANG_DECL_FN_CHECK (NODE)->thunk_p)
2995
2996	/ Set DECL_THUNK_P for node. /
2997	#define SET_DECL_THUNK_P(NODE, THIS_ADJUSTING) \
2998	(LANG_DECL_FN_CHECK (NODE)->thunk_p = 1, \
2999	LANG_DECL_FN_CHECK (NODE)->this_thunk_p = (THIS_ADJUSTING))
3000
3001	/ Nonzero if NODE is a this pointer adjusting thunk. /
3002	#define DECL_THIS_THUNK_P(NODE) \
3003	(DECL_THUNK_P (NODE) && LANG_DECL_FN_CHECK (NODE)->this_thunk_p)
3004
3005	/ Nonzero if NODE is a result pointer adjusting thunk. /
3006	#define DECL_RESULT_THUNK_P(NODE) \
3007	(DECL_THUNK_P (NODE) && !LANG_DECL_FN_CHECK (NODE)->this_thunk_p)
3008
3009	/ Nonzero if NODE is a FUNCTION_DECL, but not a thunk. /
3010	#define DECL_NON_THUNK_FUNCTION_P(NODE) \
3011	(TREE_CODE (NODE) == FUNCTION_DECL && !DECL_THUNK_P (NODE))
3012
3013	/ Nonzero if NODE is `extern "C"'. /
3014	#define DECL_EXTERN_C_P(NODE) \
3015	(DECL_LANGUAGE (NODE) == lang_c)
3016
3017	/ Nonzero if NODE is an `extern "C"' function. /
3018	#define DECL_EXTERN_C_FUNCTION_P(NODE) \
3019	(DECL_NON_THUNK_FUNCTION_P (NODE) && DECL_EXTERN_C_P (NODE))
3020
3021	/ True iff DECL is an entity with vague linkage whose definition is*
3022	available in this translation unit. /*
3023	#define DECL_REPO_AVAILABLE_P(NODE) \
3024	(DECL_LANG_SPECIFIC (NODE)->u.base.repo_available_p)
3025
3026	/ True if DECL is declared 'constexpr'. /
3027	#define DECL_DECLARED_CONSTEXPR_P(DECL) \
3028	DECL_LANG_FLAG_8 (VAR_OR_FUNCTION_DECL_CHECK (STRIP_TEMPLATE (DECL)))
3029
3030	// True if NODE was declared as 'concept'. The flag implies that the
3031	// declaration is constexpr, that the declaration cannot be specialized or
3032	// refined, and that the result type must be convertible to bool.
3033	#define DECL_DECLARED_CONCEPT_P(NODE) \
3034	(DECL_LANG_SPECIFIC (NODE)->u.base.concept_p)
3035
3036	/ Nonzero if this DECL is the __PRETTY_FUNCTION__ variable in a*
3037	template function. /*
3038	#define DECL_PRETTY_FUNCTION_P(NODE) \
3039	(DECL_NAME (NODE) \
3040	&& id_equal (DECL_NAME (NODE), "__PRETTY_FUNCTION__"))
3041
3042	/ Nonzero if the variable was declared to be thread-local.*
3043	We need a special C++ version of this test because the middle-end
3044	DECL_THREAD_LOCAL_P uses the symtab, so we can't use it for
3045	templates. /*
3046	#define CP_DECL_THREAD_LOCAL_P(NODE) \
3047	(TREE_LANG_FLAG_0 (VAR_DECL_CHECK (NODE)))
3048
3049	/ The _TYPE context in which this _DECL appears. This field holds the*
3050	class where a virtual function instance is actually defined. /*
3051	#define DECL_CLASS_CONTEXT(NODE) \
3052	(DECL_CLASS_SCOPE_P (NODE) ? DECL_CONTEXT (NODE) : NULL_TREE)
3053
3054	/ For a non-member friend function, the class (if any) in which this*
3055	friend was defined. For example, given:
3056
3057	struct S { friend void f (); };
3058
3059	the DECL_FRIEND_CONTEXT for `f' will be `S'. /*
3060	#define DECL_FRIEND_CONTEXT(NODE) \
3061	((DECL_DECLARES_FUNCTION_P (NODE) \
3062	&& DECL_FRIEND_P (NODE) && !DECL_FUNCTION_MEMBER_P (NODE)) \
3063	? LANG_DECL_FN_CHECK (NODE)->context \
3064	: NULL_TREE)
3065
3066	/ Set the DECL_FRIEND_CONTEXT for NODE to CONTEXT. /
3067	#define SET_DECL_FRIEND_CONTEXT(NODE, CONTEXT) \
3068	(LANG_DECL_FN_CHECK (NODE)->context = (CONTEXT))
3069
3070	#define CP_DECL_CONTEXT(NODE) \
3071	(!DECL_FILE_SCOPE_P (NODE) ? DECL_CONTEXT (NODE) : global_namespace)
3072	#define CP_TYPE_CONTEXT(NODE) \
3073	(!TYPE_FILE_SCOPE_P (NODE) ? TYPE_CONTEXT (NODE) : global_namespace)
3074	#define FROB_CONTEXT(NODE) \
3075	((NODE) == global_namespace ? DECL_CONTEXT (NODE) : (NODE))
3076
3077	/ 1 iff NODE has namespace scope, including the global namespace. /
3078	#define DECL_NAMESPACE_SCOPE_P(NODE) \
3079	(!DECL_TEMPLATE_PARM_P (NODE) \
3080	&& TREE_CODE (CP_DECL_CONTEXT (NODE)) == NAMESPACE_DECL)
3081
3082	#define TYPE_NAMESPACE_SCOPE_P(NODE) \
3083	(TREE_CODE (CP_TYPE_CONTEXT (NODE)) == NAMESPACE_DECL)
3084
3085	#define NAMESPACE_SCOPE_P(NODE) \
3086	((DECL_P (NODE) && DECL_NAMESPACE_SCOPE_P (NODE)) \
3087	\|\| (TYPE_P (NODE) && TYPE_NAMESPACE_SCOPE_P (NODE)))
3088
3089	/ 1 iff NODE is a class member. /
3090	#define DECL_CLASS_SCOPE_P(NODE) \
3091	(DECL_CONTEXT (NODE) && TYPE_P (DECL_CONTEXT (NODE)))
3092
3093	#define TYPE_CLASS_SCOPE_P(NODE) \
3094	(TYPE_CONTEXT (NODE) && TYPE_P (TYPE_CONTEXT (NODE)))
3095
3096	/ 1 iff NODE is function-local. /
3097	#define DECL_FUNCTION_SCOPE_P(NODE) \
3098	(DECL_CONTEXT (NODE) \
3099	&& TREE_CODE (DECL_CONTEXT (NODE)) == FUNCTION_DECL)
3100
3101	#define TYPE_FUNCTION_SCOPE_P(NODE) \
3102	(TYPE_CONTEXT (NODE) && TREE_CODE (TYPE_CONTEXT (NODE)) == FUNCTION_DECL)
3103
3104	/ 1 iff VAR_DECL node NODE is a type-info decl. This flag is set for*
3105	both the primary typeinfo object and the associated NTBS name. /*
3106	#define DECL_TINFO_P(NODE) TREE_LANG_FLAG_4 (VAR_DECL_CHECK (NODE))
3107
3108	/ 1 iff VAR_DECL node NODE is virtual table or VTT. /
3109	#define DECL_VTABLE_OR_VTT_P(NODE) TREE_LANG_FLAG_5 (VAR_DECL_CHECK (NODE))
3110
3111	/ 1 iff FUNCTION_TYPE or METHOD_TYPE has a ref-qualifier (either & or &&). /
3112	#define FUNCTION_REF_QUALIFIED(NODE) \
3113	TREE_LANG_FLAG_4 (FUNC_OR_METHOD_CHECK (NODE))
3114
3115	/ 1 iff FUNCTION_TYPE or METHOD_TYPE has &&-ref-qualifier. /
3116	#define FUNCTION_RVALUE_QUALIFIED(NODE) \
3117	TREE_LANG_FLAG_5 (FUNC_OR_METHOD_CHECK (NODE))
3118
3119	/ Returns 1 iff VAR_DECL is a construction virtual table.*
3120	DECL_VTABLE_OR_VTT_P will be true in this case and must be checked
3121	before using this macro. /*
3122	#define DECL_CONSTRUCTION_VTABLE_P(NODE) \
3123	TREE_LANG_FLAG_6 (VAR_DECL_CHECK (NODE))
3124
3125	/ 1 iff NODE is function-local, but for types. /
3126	#define LOCAL_CLASS_P(NODE) \
3127	(decl_function_context (TYPE_MAIN_DECL (NODE)) != NULL_TREE)
3128
3129	/ The nesting depth of namespace, class or function. Makes is_ancestor much*
3130	simpler. Only 8 bits available. /*
3131	#define SCOPE_DEPTH(NODE) \
3132	(NAMESPACE_DECL_CHECK (NODE)->base.u.bits.address_space)
3133
3134	/ Whether the namepace is an inline namespace. /
3135	#define DECL_NAMESPACE_INLINE_P(NODE) \
3136	TREE_LANG_FLAG_0 (NAMESPACE_DECL_CHECK (NODE))
3137
3138	/ In a NAMESPACE_DECL, a vector of using directives. /
3139	#define DECL_NAMESPACE_USING(NODE) \
3140	(LANG_DECL_NS_CHECK (NODE)->usings)
3141
3142	/ In a NAMESPACE_DECL, a vector of inline namespaces. /
3143	#define DECL_NAMESPACE_INLINEES(NODE) \
3144	(LANG_DECL_NS_CHECK (NODE)->inlinees)
3145
3146	/ Pointer to hash_map from IDENTIFIERS to DECLS /
3147	#define DECL_NAMESPACE_BINDINGS(NODE) \
3148	(LANG_DECL_NS_CHECK (NODE)->bindings)
3149
3150	/ In a NAMESPACE_DECL, points to the original namespace if this is*
3151	a namespace alias. /*
3152	#define DECL_NAMESPACE_ALIAS(NODE) \
3153	DECL_ABSTRACT_ORIGIN (NAMESPACE_DECL_CHECK (NODE))
3154	#define ORIGINAL_NAMESPACE(NODE) \
3155	(DECL_NAMESPACE_ALIAS (NODE) ? DECL_NAMESPACE_ALIAS (NODE) : (NODE))
3156
3157	/ Nonzero if NODE is the std namespace. /
3158	#define DECL_NAMESPACE_STD_P(NODE) \
3159	(TREE_CODE (NODE) == NAMESPACE_DECL \
3160	&& CP_DECL_CONTEXT (NODE) == global_namespace \
3161	&& DECL_NAME (NODE) == std_identifier)
3162
3163	/ In a TREE_LIST in an attribute list, indicates that the attribute*
3164	must be applied at instantiation time. /*
3165	#define ATTR_IS_DEPENDENT(NODE) TREE_LANG_FLAG_0 (TREE_LIST_CHECK (NODE))
3166
3167	/ In a TREE_LIST in the argument of attribute abi_tag, indicates that the tag*
3168	was inherited from a template parameter, not explicitly indicated. /*
3169	#define ABI_TAG_IMPLICIT(NODE) TREE_LANG_FLAG_0 (TREE_LIST_CHECK (NODE))
3170
3171	extern tree decl_shadowed_for_var_lookup (tree);
3172	extern void decl_shadowed_for_var_insert (tree, tree);
3173
3174	/ Non zero if this is a using decl for a dependent scope. /
3175	#define DECL_DEPENDENT_P(NODE) DECL_LANG_FLAG_0 (USING_DECL_CHECK (NODE))
3176
3177	/ The scope named in a using decl. /
3178	#define USING_DECL_SCOPE(NODE) TREE_TYPE (USING_DECL_CHECK (NODE))
3179
3180	/ The decls named by a using decl. /
3181	#define USING_DECL_DECLS(NODE) DECL_INITIAL (USING_DECL_CHECK (NODE))
3182
3183	/ Non zero if the using decl refers to a dependent type. /
3184	#define USING_DECL_TYPENAME_P(NODE) DECL_LANG_FLAG_1 (USING_DECL_CHECK (NODE))
3185
3186	/ In a VAR_DECL, true if we have a shadowed local variable*
3187	in the shadowed var table for this VAR_DECL. /*
3188	#define DECL_HAS_SHADOWED_FOR_VAR_P(NODE) \
3189	(VAR_DECL_CHECK (NODE)->decl_with_vis.shadowed_for_var_p)
3190
3191	/ In a VAR_DECL for a variable declared in a for statement,*
3192	this is the shadowed (local) variable. /*
3193	#define DECL_SHADOWED_FOR_VAR(NODE) \
3194	(DECL_HAS_SHADOWED_FOR_VAR_P(NODE) ? decl_shadowed_for_var_lookup (NODE) : NULL)
3195
3196	#define SET_DECL_SHADOWED_FOR_VAR(NODE, VAL) \
3197	(decl_shadowed_for_var_insert (NODE, VAL))
3198
3199	/ In a FUNCTION_DECL, this is nonzero if this function was defined in*
3200	the class definition. We have saved away the text of the function,
3201	but have not yet processed it. /*
3202	#define DECL_PENDING_INLINE_P(NODE) \
3203	(LANG_DECL_FN_CHECK (NODE)->pending_inline_p)
3204
3205	/ If DECL_PENDING_INLINE_P holds, this is the saved text of the*
3206	function. /*
3207	#define DECL_PENDING_INLINE_INFO(NODE) \
3208	(LANG_DECL_FN_CHECK (NODE)->u.pending_inline_info)
3209
3210	/ Nonzero for TYPE_DECL means that it was written 'using name = type'. /
3211	#define TYPE_DECL_ALIAS_P(NODE) \
3212	DECL_LANG_FLAG_6 (TYPE_DECL_CHECK (NODE))
3213
3214	/ Nonzero for TEMPLATE_DECL means that it is a 'complex' alias template. /
3215	#define TEMPLATE_DECL_COMPLEX_ALIAS_P(NODE) \
3216	DECL_LANG_FLAG_2 (TEMPLATE_DECL_CHECK (NODE))
3217
3218	/ Nonzero for a type which is an alias for another type; i.e, a type*
3219	which declaration was written 'using name-of-type =
3220	another-type'. /*
3221	#define TYPE_ALIAS_P(NODE) \
3222	(TYPE_P (NODE) \
3223	&& TYPE_NAME (NODE) \
3224	&& TREE_CODE (TYPE_NAME (NODE)) == TYPE_DECL \
3225	&& TYPE_DECL_ALIAS_P (TYPE_NAME (NODE)))
3226
3227	/ If non-NULL for a VAR_DECL, FUNCTION_DECL, TYPE_DECL or*
3228	TEMPLATE_DECL, the entity is either a template specialization (if
3229	DECL_USE_TEMPLATE is nonzero) or the abstract instance of the
3230	template itself.
3231
3232	In either case, DECL_TEMPLATE_INFO is a TREE_LIST, whose
3233	TREE_PURPOSE is the TEMPLATE_DECL of which this entity is a
3234	specialization or abstract instance. The TREE_VALUE is the
3235	template arguments used to specialize the template.
3236
3237	Consider:
3238
3239	template <typename T> struct S { friend void f(T) {} };
3240
3241	In this case, S<int>::f is, from the point of view of the compiler,
3242	an instantiation of a template -- but, from the point of view of
3243	the language, each instantiation of S results in a wholly unrelated
3244	global function f. In this case, DECL_TEMPLATE_INFO for S<int>::f
3245	will be non-NULL, but DECL_USE_TEMPLATE will be zero. /*
3246	#define DECL_TEMPLATE_INFO(NODE) \
3247	(DECL_LANG_SPECIFIC (VAR_TEMPL_TYPE_FIELD_OR_FUNCTION_DECL_CHECK (NODE)) \
3248	->u.min.template_info)
3249
3250	/ For a lambda capture proxy, its captured variable. /
3251	#define DECL_CAPTURED_VARIABLE(NODE) \
3252	(LANG_DECL_U2_CHECK (NODE, 0)->access)
3253
3254	/ For a VAR_DECL, indicates that the variable is actually a*
3255	non-static data member of anonymous union that has been promoted to
3256	variable status. /*
3257	#define DECL_ANON_UNION_VAR_P(NODE) \
3258	(DECL_LANG_FLAG_4 (VAR_DECL_CHECK (NODE)))
3259
3260	/ Template information for a RECORD_TYPE or UNION_TYPE. /
3261	#define CLASSTYPE_TEMPLATE_INFO(NODE) \
3262	(TYPE_LANG_SLOT_1 (RECORD_OR_UNION_CHECK (NODE)))
3263
3264	/ Template information for a template template parameter. /
3265	#define TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO(NODE) \
3266	(TYPE_LANG_SLOT_1 (BOUND_TEMPLATE_TEMPLATE_PARM_TYPE_CHECK (NODE)))
3267
3268	/ Template information for an ENUMERAL_, RECORD_, UNION_TYPE, or*
3269	BOUND_TEMPLATE_TEMPLATE_PARM type. This ignores any alias
3270	templateness of NODE. It'd be nice if this could unconditionally
3271	access the slot, rather than return NULL if given a
3272	non-templatable type. /*
3273	#define TYPE_TEMPLATE_INFO(NODE) \
3274	(TREE_CODE (NODE) == ENUMERAL_TYPE \
3275	\|\| TREE_CODE (NODE) == BOUND_TEMPLATE_TEMPLATE_PARM \
3276	\|\| RECORD_OR_UNION_TYPE_P (NODE) \
3277	? TYPE_LANG_SLOT_1 (NODE) : NULL_TREE)
3278
3279	/ Template information (if any) for an alias type. /
3280	#define TYPE_ALIAS_TEMPLATE_INFO(NODE) \
3281	(DECL_LANG_SPECIFIC (TYPE_NAME (NODE)) \
3282	? DECL_TEMPLATE_INFO (TYPE_NAME (NODE)) \
3283	: NULL_TREE)
3284
3285	/ If NODE is a type alias, this accessor returns the template info*
3286	for the alias template (if any). Otherwise behave as
3287	TYPE_TEMPLATE_INFO. /*
3288	#define TYPE_TEMPLATE_INFO_MAYBE_ALIAS(NODE) \
3289	(TYPE_ALIAS_P (NODE) \
3290	? TYPE_ALIAS_TEMPLATE_INFO (NODE) \
3291	: TYPE_TEMPLATE_INFO (NODE))
3292
3293	/ Set the template information for an ENUMERAL_, RECORD_, or*
3294	UNION_TYPE to VAL. /*
3295	#define SET_TYPE_TEMPLATE_INFO(NODE, VAL) \
3296	(TREE_CODE (NODE) == ENUMERAL_TYPE \
3297	\|\| (CLASS_TYPE_P (NODE) && !TYPE_ALIAS_P (NODE)) \
3298	? (TYPE_LANG_SLOT_1 (NODE) = (VAL)) \
3299	: (DECL_TEMPLATE_INFO (TYPE_NAME (NODE)) = (VAL)))
3300
3301	#define TI_TEMPLATE(NODE) TREE_TYPE (TEMPLATE_INFO_CHECK (NODE))
3302	#define TI_ARGS(NODE) TREE_CHAIN (TEMPLATE_INFO_CHECK (NODE))
3303	#define TI_PENDING_TEMPLATE_FLAG(NODE) TREE_LANG_FLAG_1 (NODE)
3304	/ For a given TREE_VEC containing a template argument list,*
3305	this property contains the number of arguments that are not
3306	defaulted. /*
3307	#define NON_DEFAULT_TEMPLATE_ARGS_COUNT(NODE) TREE_CHAIN (TREE_VEC_CHECK (NODE))
3308	/ Below are the setter and getter of the NON_DEFAULT_TEMPLATE_ARGS_COUNT*
3309	property. /*
3310	#define SET_NON_DEFAULT_TEMPLATE_ARGS_COUNT(NODE, INT_VALUE) \
3311	NON_DEFAULT_TEMPLATE_ARGS_COUNT(NODE) = build_int_cst (NULL_TREE, INT_VALUE)
3312	#if CHECKING_P
3313	#define GET_NON_DEFAULT_TEMPLATE_ARGS_COUNT(NODE) \
3314	int_cst_value (NON_DEFAULT_TEMPLATE_ARGS_COUNT (NODE))
3315	#else
3316	#define GET_NON_DEFAULT_TEMPLATE_ARGS_COUNT(NODE) \
3317	NON_DEFAULT_TEMPLATE_ARGS_COUNT (NODE) \
3318	? int_cst_value (NON_DEFAULT_TEMPLATE_ARGS_COUNT (NODE)) \
3319	: TREE_VEC_LENGTH (INNERMOST_TEMPLATE_ARGS (NODE))
3320	#endif
3321	/ The list of typedefs - used in the template - that need*
3322	access checking at template instantiation time.
3323
3324	FIXME this should be associated with the TEMPLATE_DECL, not the
3325	TEMPLATE_INFO. /*
3326	#define TI_TYPEDEFS_NEEDING_ACCESS_CHECKING(NODE) \
3327	((struct tree_template_info*)TEMPLATE_INFO_CHECK \
3328	(NODE))->typedefs_needing_access_checking
3329
3330	/ We use TREE_VECs to hold template arguments. If there is only one*
3331	level of template arguments, then the TREE_VEC contains the
3332	arguments directly. If there is more than one level of template
3333	arguments, then each entry in the TREE_VEC is itself a TREE_VEC,
3334	containing the template arguments for a single level. The first
3335	entry in the outer TREE_VEC is the outermost level of template
3336	parameters; the last is the innermost.
3337
3338	It is incorrect to ever form a template argument vector containing
3339	only one level of arguments, but which is a TREE_VEC containing as
3340	its only entry the TREE_VEC for that level.
3341
3342	For each TREE_VEC containing the template arguments for a single
3343	level, it's possible to get or set the number of non defaulted
3344	template arguments by using the accessor macros
3345	GET_NON_DEFAULT_TEMPLATE_ARGS_COUNT or
3346	SET_NON_DEFAULT_TEMPLATE_ARGS_COUNT. /*
3347
3348	/ Nonzero if the template arguments is actually a vector of vectors,*
3349	rather than just a vector. /*
3350	#define TMPL_ARGS_HAVE_MULTIPLE_LEVELS(NODE) \
3351	(NODE && TREE_VEC_LENGTH (NODE) && TREE_VEC_ELT (NODE, 0) \
3352	&& TREE_CODE (TREE_VEC_ELT (NODE, 0)) == TREE_VEC)
3353
3354	/ The depth of a template argument vector. When called directly by*
3355	the parser, we use a TREE_LIST rather than a TREE_VEC to represent
3356	template arguments. In fact, we may even see NULL_TREE if there
3357	are no template arguments. In both of those cases, there is only
3358	one level of template arguments. /*
3359	#define TMPL_ARGS_DEPTH(NODE) \
3360	(TMPL_ARGS_HAVE_MULTIPLE_LEVELS (NODE) ? TREE_VEC_LENGTH (NODE) : 1)
3361
3362	/ The LEVELth level of the template ARGS. The outermost level of*
3363	args is level 1, not level 0. /*
3364	#define TMPL_ARGS_LEVEL(ARGS, LEVEL) \
3365	(TMPL_ARGS_HAVE_MULTIPLE_LEVELS (ARGS) \
3366	? TREE_VEC_ELT (ARGS, (LEVEL) - 1) : (ARGS))
3367
3368	/ Set the LEVELth level of the template ARGS to VAL. This macro does*
3369	not work with single-level argument vectors. /*
3370	#define SET_TMPL_ARGS_LEVEL(ARGS, LEVEL, VAL) \
3371	(TREE_VEC_ELT (ARGS, (LEVEL) - 1) = (VAL))
3372
3373	/ Accesses the IDXth parameter in the LEVELth level of the ARGS. /
3374	#define TMPL_ARG(ARGS, LEVEL, IDX) \
3375	(TREE_VEC_ELT (TMPL_ARGS_LEVEL (ARGS, LEVEL), IDX))
3376
3377	/ Given a single level of template arguments in NODE, return the*
3378	number of arguments. /*
3379	#define NUM_TMPL_ARGS(NODE) \
3380	(TREE_VEC_LENGTH (NODE))
3381
3382	/ Returns the innermost level of template arguments in ARGS. /
3383	#define INNERMOST_TEMPLATE_ARGS(NODE) \
3384	(get_innermost_template_args ((NODE), 1))
3385
3386	/ The number of levels of template parameters given by NODE. /
3387	#define TMPL_PARMS_DEPTH(NODE) \
3388	((HOST_WIDE_INT) TREE_INT_CST_LOW (TREE_PURPOSE (NODE)))
3389
3390	/ The TEMPLATE_DECL instantiated or specialized by NODE. This*
3391	TEMPLATE_DECL will be the immediate parent, not the most general
3392	template. For example, in:
3393
3394	template <class T> struct S { template <class U> void f(U); }
3395
3396	the FUNCTION_DECL for S<int>::f<double> will have, as its
3397	DECL_TI_TEMPLATE, `template <class U> S<int>::f<U>'.
3398
3399	As a special case, for a member friend template of a template
3400	class, this value will not be a TEMPLATE_DECL, but rather an
3401	IDENTIFIER_NODE or OVERLOAD indicating the name of the template and
3402	any explicit template arguments provided. For example, in:
3403
3404	template <class T> struct S { friend void f<int>(int, double); }
3405
3406	the DECL_TI_TEMPLATE will be an IDENTIFIER_NODE for `f' and the
3407	DECL_TI_ARGS will be {int}.
3408
3409	For a FIELD_DECL with a non-static data member initializer, this value
3410	is the FIELD_DECL it was instantiated from. /*
3411	#define DECL_TI_TEMPLATE(NODE) TI_TEMPLATE (DECL_TEMPLATE_INFO (NODE))
3412
3413	/ The template arguments used to obtain this decl from the most*
3414	general form of DECL_TI_TEMPLATE. For the example given for
3415	DECL_TI_TEMPLATE, the DECL_TI_ARGS will be {int, double}. These
3416	are always the full set of arguments required to instantiate this
3417	declaration from the most general template specialized here. /*
3418	#define DECL_TI_ARGS(NODE) TI_ARGS (DECL_TEMPLATE_INFO (NODE))
3419
3420	/ The TEMPLATE_DECL associated with NODE, a class type. Even if NODE*
3421	will be generated from a partial specialization, the TEMPLATE_DECL
3422	referred to here will be the original template. For example,
3423	given:
3424
3425	template <typename T> struct S {};
3426	template <typename T> struct S<T> {};*
3427
3428	the CLASSTPYE_TI_TEMPLATE for S<int> will be S, not the S<T>. /*
3429	#define CLASSTYPE_TI_TEMPLATE(NODE) TI_TEMPLATE (CLASSTYPE_TEMPLATE_INFO (NODE))
3430	#define CLASSTYPE_TI_ARGS(NODE) TI_ARGS (CLASSTYPE_TEMPLATE_INFO (NODE))
3431
3432	/ For a template instantiation TYPE, returns the TYPE corresponding*
3433	to the primary template. Otherwise returns TYPE itself. /*
3434	#define CLASSTYPE_PRIMARY_TEMPLATE_TYPE(TYPE) \
3435	((CLASSTYPE_USE_TEMPLATE ((TYPE)) \
3436	&& !CLASSTYPE_TEMPLATE_SPECIALIZATION ((TYPE))) \
3437	? TREE_TYPE (DECL_TEMPLATE_RESULT (DECL_PRIMARY_TEMPLATE \
3438	(CLASSTYPE_TI_TEMPLATE ((TYPE))))) \
3439	: (TYPE))
3440
3441	/ Like CLASS_TI_TEMPLATE, but also works for ENUMERAL_TYPEs. /
3442	#define TYPE_TI_TEMPLATE(NODE) \
3443	(TI_TEMPLATE (TYPE_TEMPLATE_INFO (NODE)))
3444
3445	/ Like DECL_TI_ARGS, but for an ENUMERAL_, RECORD_, or UNION_TYPE. /
3446	#define TYPE_TI_ARGS(NODE) \
3447	(TI_ARGS (TYPE_TEMPLATE_INFO (NODE)))
3448
3449	#define INNERMOST_TEMPLATE_PARMS(NODE) TREE_VALUE (NODE)
3450
3451	/ Nonzero if NODE (a TEMPLATE_DECL) is a member template, in the*
3452	sense of [temp.mem]. /*
3453	#define DECL_MEMBER_TEMPLATE_P(NODE) \
3454	(DECL_LANG_FLAG_1 (TEMPLATE_DECL_CHECK (NODE)))
3455
3456	/ Nonzero if the NODE corresponds to the template parameters for a*
3457	member template, whose inline definition is being processed after
3458	the class definition is complete. /*
3459	#define TEMPLATE_PARMS_FOR_INLINE(NODE) TREE_LANG_FLAG_1 (NODE)
3460
3461	/ Determine if a declaration (PARM_DECL or FIELD_DECL) is a pack. /
3462	#define DECL_PACK_P(NODE) \
3463	(DECL_P (NODE) && PACK_EXPANSION_P (TREE_TYPE (NODE)))
3464
3465	/ Determines if NODE is an expansion of one or more parameter packs,*
3466	e.g., a TYPE_PACK_EXPANSION or EXPR_PACK_EXPANSION. /*
3467	#define PACK_EXPANSION_P(NODE) \
3468	(TREE_CODE (NODE) == TYPE_PACK_EXPANSION \
3469	\|\| TREE_CODE (NODE) == EXPR_PACK_EXPANSION)
3470
3471	/ Extracts the type or expression pattern from a TYPE_PACK_EXPANSION or*
3472	EXPR_PACK_EXPANSION. /*
3473	#define PACK_EXPANSION_PATTERN(NODE) \
3474	(TREE_CODE (NODE) == TYPE_PACK_EXPANSION ? TREE_TYPE (NODE) \
3475	: TREE_OPERAND (NODE, 0))
3476
3477	/ Sets the type or expression pattern for a TYPE_PACK_EXPANSION or*
3478	EXPR_PACK_EXPANSION. /*
3479	#define SET_PACK_EXPANSION_PATTERN(NODE,VALUE) \
3480	if (TREE_CODE (NODE) == TYPE_PACK_EXPANSION) \
3481	TREE_TYPE (NODE) = VALUE; \
3482	else \
3483	TREE_OPERAND (NODE, 0) = VALUE
3484
3485	/ The list of parameter packs used in the PACK_EXPANSION_* node. The*
3486	TREE_VALUE of each TREE_LIST contains the parameter packs. /*
3487	#define PACK_EXPANSION_PARAMETER_PACKS(NODE) \
3488	*(TREE_CODE (NODE) == EXPR_PACK_EXPANSION \
3489	? &TREE_OPERAND (NODE, 1) \
3490	: &TYPE_MIN_VALUE_RAW (TYPE_PACK_EXPANSION_CHECK (NODE)))
3491
3492	/ Any additional template args to be applied when substituting into*
3493	the pattern, set by tsubst_pack_expansion for partial instantiations. /*
3494	#define PACK_EXPANSION_EXTRA_ARGS(NODE) \
3495	*(TREE_CODE (NODE) == TYPE_PACK_EXPANSION \
3496	? &TYPE_MAX_VALUE_RAW (NODE) \
3497	: &TREE_OPERAND ((NODE), 2))
3498
3499	/ True iff this pack expansion is within a function context. /
3500	#define PACK_EXPANSION_LOCAL_P(NODE) TREE_LANG_FLAG_0 (NODE)
3501
3502	/ True iff this pack expansion is for sizeof.... /
3503	#define PACK_EXPANSION_SIZEOF_P(NODE) TREE_LANG_FLAG_1 (NODE)
3504
3505	/ True iff the wildcard can match a template parameter pack. /
3506	#define WILDCARD_PACK_P(NODE) TREE_LANG_FLAG_0 (NODE)
3507
3508	/ Determine if this is an argument pack. /
3509	#define ARGUMENT_PACK_P(NODE) \
3510	(TREE_CODE (NODE) == TYPE_ARGUMENT_PACK \
3511	\|\| TREE_CODE (NODE) == NONTYPE_ARGUMENT_PACK)
3512
3513	/ The arguments stored in an argument pack. Arguments are stored in a*
3514	TREE_VEC, which may have length zero. /*
3515	#define ARGUMENT_PACK_ARGS(NODE) \
3516	(TREE_CODE (NODE) == TYPE_ARGUMENT_PACK? TREE_TYPE (NODE) \
3517	: TREE_OPERAND (NODE, 0))
3518
3519	/ Set the arguments stored in an argument pack. VALUE must be a*
3520	TREE_VEC. /*
3521	#define SET_ARGUMENT_PACK_ARGS(NODE,VALUE) \
3522	if (TREE_CODE (NODE) == TYPE_ARGUMENT_PACK) \
3523	TREE_TYPE (NODE) = VALUE; \
3524	else \
3525	TREE_OPERAND (NODE, 0) = VALUE
3526
3527	/ Whether the argument pack is "incomplete", meaning that more*
3528	arguments can still be deduced. Incomplete argument packs are only
3529	used when the user has provided an explicit template argument list
3530	for a variadic function template. Some of the explicit template
3531	arguments will be placed into the beginning of the argument pack,
3532	but additional arguments might still be deduced. /*
3533	#define ARGUMENT_PACK_INCOMPLETE_P(NODE) \
3534	TREE_ADDRESSABLE (ARGUMENT_PACK_ARGS (NODE))
3535
3536	/ When ARGUMENT_PACK_INCOMPLETE_P, stores the explicit template*
3537	arguments used to fill this pack. /*
3538	#define ARGUMENT_PACK_EXPLICIT_ARGS(NODE) \
3539	TREE_TYPE (ARGUMENT_PACK_ARGS (NODE))
3540
3541	/ In an ARGUMENT_PACK_SELECT, the argument pack from which an*
3542	argument will be selected. /*
3543	#define ARGUMENT_PACK_SELECT_FROM_PACK(NODE) \
3544	(((struct tree_argument_pack_select *)ARGUMENT_PACK_SELECT_CHECK (NODE))->argument_pack)
3545
3546	/ In an ARGUMENT_PACK_SELECT, the index of the argument we want to*
3547	select. /*
3548	#define ARGUMENT_PACK_SELECT_INDEX(NODE) \
3549	(((struct tree_argument_pack_select *)ARGUMENT_PACK_SELECT_CHECK (NODE))->index)
3550
3551	/ In an ARGUMENT_PACK_SELECT, the actual underlying argument that the*
3552	ARGUMENT_PACK_SELECT represents. /*
3553	#define ARGUMENT_PACK_SELECT_ARG(NODE) \
3554	TREE_VEC_ELT (ARGUMENT_PACK_ARGS (ARGUMENT_PACK_SELECT_FROM_PACK (NODE)), \
3555	ARGUMENT_PACK_SELECT_INDEX (NODE))
3556
3557	#define FOLD_EXPR_CHECK(NODE) \
3558	TREE_CHECK4 (NODE, UNARY_LEFT_FOLD_EXPR, UNARY_RIGHT_FOLD_EXPR, \
3559	BINARY_LEFT_FOLD_EXPR, BINARY_RIGHT_FOLD_EXPR)
3560
3561	#define BINARY_FOLD_EXPR_CHECK(NODE) \
3562	TREE_CHECK2 (NODE, BINARY_LEFT_FOLD_EXPR, BINARY_RIGHT_FOLD_EXPR)
3563
3564	/ True if NODE is UNARY_FOLD_EXPR or a BINARY_FOLD_EXPR /
3565	#define FOLD_EXPR_P(NODE) \
3566	(TREE_CODE (NODE) == UNARY_LEFT_FOLD_EXPR \
3567	\|\| TREE_CODE (NODE) == UNARY_RIGHT_FOLD_EXPR \
3568	\|\| TREE_CODE (NODE) == BINARY_LEFT_FOLD_EXPR \
3569	\|\| TREE_CODE (NODE) == BINARY_RIGHT_FOLD_EXPR)
3570
3571	/ True when NODE is a fold over a compound assignment operator. /
3572	#define FOLD_EXPR_MODIFY_P(NODE) \
3573	TREE_LANG_FLAG_0 (FOLD_EXPR_CHECK (NODE))
3574
3575	/ An INTEGER_CST containing the tree code of the folded operator. /
3576	#define FOLD_EXPR_OP(NODE) \
3577	TREE_OPERAND (FOLD_EXPR_CHECK (NODE), 0)
3578
3579	/ The expression containing an unexpanded parameter pack. /
3580	#define FOLD_EXPR_PACK(NODE) \
3581	TREE_OPERAND (FOLD_EXPR_CHECK (NODE), 1)
3582
3583	/ In a binary fold expression, the argument with no unexpanded*
3584	parameter packs. /*
3585	#define FOLD_EXPR_INIT(NODE) \
3586	TREE_OPERAND (BINARY_FOLD_EXPR_CHECK (NODE), 2)
3587
3588	/ In a FUNCTION_DECL, the saved language-specific per-function data. /
3589	#define DECL_SAVED_FUNCTION_DATA(NODE) \
3590	(LANG_DECL_FN_CHECK (FUNCTION_DECL_CHECK (NODE)) \
3591	->u.saved_language_function)
3592
3593	/ True if NODE is an implicit INDIRECT_EXPR from convert_from_reference. /
3594	#define REFERENCE_REF_P(NODE) \
3595	(INDIRECT_REF_P (NODE) \
3596	&& TREE_TYPE (TREE_OPERAND (NODE, 0)) \
3597	&& (TREE_CODE (TREE_TYPE (TREE_OPERAND ((NODE), 0))) \
3598	== REFERENCE_TYPE))
3599
3600	/ True if NODE is a REFERENCE_TYPE which is OK to instantiate to be a*
3601	reference to VLA type, because it's used for VLA capture. /*
3602	#define REFERENCE_VLA_OK(NODE) \
3603	(TYPE_LANG_FLAG_5 (REFERENCE_TYPE_CHECK (NODE)))
3604
3605	#define NEW_EXPR_USE_GLOBAL(NODE) \
3606	TREE_LANG_FLAG_0 (NEW_EXPR_CHECK (NODE))
3607	#define DELETE_EXPR_USE_GLOBAL(NODE) \
3608	TREE_LANG_FLAG_0 (DELETE_EXPR_CHECK (NODE))
3609	#define DELETE_EXPR_USE_VEC(NODE) \
3610	TREE_LANG_FLAG_1 (DELETE_EXPR_CHECK (NODE))
3611
3612	#define CALL_OR_AGGR_INIT_CHECK(NODE) \
3613	TREE_CHECK2 ((NODE), CALL_EXPR, AGGR_INIT_EXPR)
3614
3615	/ Indicates that this is a non-dependent COMPOUND_EXPR which will*
3616	resolve to a function call. /*
3617	#define COMPOUND_EXPR_OVERLOADED(NODE) \
3618	TREE_LANG_FLAG_0 (COMPOUND_EXPR_CHECK (NODE))
3619
3620	/ In a CALL_EXPR appearing in a template, true if Koenig lookup*
3621	should be performed at instantiation time. /*
3622	#define KOENIG_LOOKUP_P(NODE) TREE_LANG_FLAG_0 (CALL_EXPR_CHECK (NODE))
3623
3624	/ True if the arguments to NODE should be evaluated in left-to-right*
3625	order regardless of PUSH_ARGS_REVERSED. /*
3626	#define CALL_EXPR_ORDERED_ARGS(NODE) \
3627	TREE_LANG_FLAG_3 (CALL_OR_AGGR_INIT_CHECK (NODE))
3628
3629	/ True if the arguments to NODE should be evaluated in right-to-left*
3630	order regardless of PUSH_ARGS_REVERSED. /*
3631	#define CALL_EXPR_REVERSE_ARGS(NODE) \
3632	TREE_LANG_FLAG_5 (CALL_OR_AGGR_INIT_CHECK (NODE))
3633
3634	/ True if CALL_EXPR was written as an operator expression, not a function*
3635	call. /*
3636	#define CALL_EXPR_OPERATOR_SYNTAX(NODE) \
3637	TREE_LANG_FLAG_6 (CALL_OR_AGGR_INIT_CHECK (NODE))
3638
3639	/ Indicates whether a string literal has been parenthesized. Such*
3640	usages are disallowed in certain circumstances. /*
3641
3642	#define PAREN_STRING_LITERAL_P(NODE) \
3643	TREE_LANG_FLAG_0 (STRING_CST_CHECK (NODE))
3644
3645	/ Indicates whether a COMPONENT_REF or a SCOPE_REF has been parenthesized, or*
3646	an INDIRECT_REF comes from parenthesizing a _DECL. Currently only set some
3647	of the time in C++14 mode. /*
3648
3649	#define REF_PARENTHESIZED_P(NODE) \
3650	TREE_LANG_FLAG_2 (TREE_CHECK3 ((NODE), COMPONENT_REF, INDIRECT_REF, SCOPE_REF))
3651
3652	/ Nonzero if this AGGR_INIT_EXPR provides for initialization via a*
3653	constructor call, rather than an ordinary function call. /*
3654	#define AGGR_INIT_VIA_CTOR_P(NODE) \
3655	TREE_LANG_FLAG_0 (AGGR_INIT_EXPR_CHECK (NODE))
3656
3657	/ Nonzero if expanding this AGGR_INIT_EXPR should first zero-initialize*
3658	the object. /*
3659	#define AGGR_INIT_ZERO_FIRST(NODE) \
3660	TREE_LANG_FLAG_2 (AGGR_INIT_EXPR_CHECK (NODE))
3661
3662	/ Nonzero means that the call is the jump from a thunk to the*
3663	thunked-to function. /*
3664	#define AGGR_INIT_FROM_THUNK_P(NODE) \
3665	(AGGR_INIT_EXPR_CHECK (NODE)->base.protected_flag)
3666
3667	/ AGGR_INIT_EXPR accessors. These are equivalent to the CALL_EXPR*
3668	accessors, except for AGGR_INIT_EXPR_SLOT (which takes the place of
3669	CALL_EXPR_STATIC_CHAIN). /*
3670
3671	#define AGGR_INIT_EXPR_FN(NODE) TREE_OPERAND (AGGR_INIT_EXPR_CHECK (NODE), 1)
3672	#define AGGR_INIT_EXPR_SLOT(NODE) \
3673	TREE_OPERAND (AGGR_INIT_EXPR_CHECK (NODE), 2)
3674	#define AGGR_INIT_EXPR_ARG(NODE, I) \
3675	TREE_OPERAND (AGGR_INIT_EXPR_CHECK (NODE), (I) + 3)
3676	#define aggr_init_expr_nargs(NODE) (VL_EXP_OPERAND_LENGTH(NODE) - 3)
3677
3678	/ AGGR_INIT_EXPR_ARGP returns a pointer to the argument vector for NODE.*
3679	We can't use &AGGR_INIT_EXPR_ARG (NODE, 0) because that will complain if
3680	the argument count is zero when checking is enabled. Instead, do
3681	the pointer arithmetic to advance past the 3 fixed operands in a
3682	AGGR_INIT_EXPR. That produces a valid pointer to just past the end of
3683	the operand array, even if it's not valid to dereference it. /*
3684	#define AGGR_INIT_EXPR_ARGP(NODE) \
3685	(&(TREE_OPERAND (AGGR_INIT_EXPR_CHECK (NODE), 0)) + 3)
3686
3687	/ Abstract iterators for AGGR_INIT_EXPRs. /
3688
3689	/ Structure containing iterator state. /
3690	struct aggr_init_expr_arg_iterator {
3691	tree t; / the aggr_init_expr /
3692	int n; / argument count /
3693	int i; / next argument index /
3694	};
3695
3696	/ Initialize the abstract argument list iterator object ITER with the*
3697	arguments from AGGR_INIT_EXPR node EXP. /*
3698	inline void
3699	init_aggr_init_expr_arg_iterator (tree exp,
3700	aggr_init_expr_arg_iterator *iter)
3701	{
3702	iter->t = exp;
3703	iter->n = aggr_init_expr_nargs (exp);
3704	iter->i = `0`;
3705	}
3706
3707	/ Return the next argument from abstract argument list iterator object ITER,*
3708	and advance its state. Return NULL_TREE if there are no more arguments. /*
3709	inline tree
3710	next_aggr_init_expr_arg (aggr_init_expr_arg_iterator *iter)
3711	{
3712	tree result;
3713	if (iter->i >= iter->n)
3714	return NULL_TREE;
3715	result = AGGR_INIT_EXPR_ARG (iter->t, iter->i);
3716	iter->i++;
3717	return result;
3718	}
3719
3720	/ Initialize the abstract argument list iterator object ITER, then advance*
3721	past and return the first argument. Useful in for expressions, e.g.
3722	for (arg = first_aggr_init_expr_arg (exp, &iter); arg;
3723	arg = next_aggr_init_expr_arg (&iter)) /*
3724	inline tree
3725	first_aggr_init_expr_arg (tree exp, aggr_init_expr_arg_iterator *iter)
3726	{
3727	init_aggr_init_expr_arg_iterator (exp, iter);
3728	return next_aggr_init_expr_arg (iter);
3729	}
3730
3731	/ Test whether there are more arguments in abstract argument list iterator*
3732	ITER, without changing its state. /*
3733	inline bool
3734	more_aggr_init_expr_args_p (const aggr_init_expr_arg_iterator *iter)
3735	{
3736	return (iter->i < iter->n);
3737	}
3738
3739	/ Iterate through each argument ARG of AGGR_INIT_EXPR CALL, using variable*
3740	ITER (of type aggr_init_expr_arg_iterator) to hold the iteration state. /*
3741	#define FOR_EACH_AGGR_INIT_EXPR_ARG(arg, iter, call) \
3742	for ((arg) = first_aggr_init_expr_arg ((call), &(iter)); (arg); \
3743	(arg) = next_aggr_init_expr_arg (&(iter)))
3744
3745	/ VEC_INIT_EXPR accessors. /
3746	#define VEC_INIT_EXPR_SLOT(NODE) TREE_OPERAND (VEC_INIT_EXPR_CHECK (NODE), 0)
3747	#define VEC_INIT_EXPR_INIT(NODE) TREE_OPERAND (VEC_INIT_EXPR_CHECK (NODE), 1)
3748
3749	/ Indicates that a VEC_INIT_EXPR is a potential constant expression.*
3750	Only set when the current function is constexpr. /*
3751	#define VEC_INIT_EXPR_IS_CONSTEXPR(NODE) \
3752	TREE_LANG_FLAG_0 (VEC_INIT_EXPR_CHECK (NODE))
3753
3754	/ Indicates that a VEC_INIT_EXPR is expressing value-initialization. /
3755	#define VEC_INIT_EXPR_VALUE_INIT(NODE) \
3756	TREE_LANG_FLAG_1 (VEC_INIT_EXPR_CHECK (NODE))
3757
3758	/ The condition under which this MUST_NOT_THROW_EXPR actually blocks*
3759	exceptions. NULL_TREE means 'true'. /*
3760	#define MUST_NOT_THROW_COND(NODE) \
3761	TREE_OPERAND (MUST_NOT_THROW_EXPR_CHECK (NODE), 1)
3762
3763	/ The TYPE_MAIN_DECL for a class template type is a TYPE_DECL, not a*
3764	TEMPLATE_DECL. This macro determines whether or not a given class
3765	type is really a template type, as opposed to an instantiation or
3766	specialization of one. /*
3767	#define CLASSTYPE_IS_TEMPLATE(NODE) \
3768	(CLASSTYPE_TEMPLATE_INFO (NODE) \
3769	&& !CLASSTYPE_USE_TEMPLATE (NODE) \
3770	&& PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (NODE)))
3771
3772	/ The name used by the user to name the typename type. Typically,*
3773	this is an IDENTIFIER_NODE, and the same as the DECL_NAME on the
3774	corresponding TYPE_DECL. However, this may also be a
3775	TEMPLATE_ID_EXPR if we had something like `typename X::Y<T>'. /*
3776	#define TYPENAME_TYPE_FULLNAME(NODE) \
3777	(TYPE_VALUES_RAW (TYPENAME_TYPE_CHECK (NODE)))
3778
3779	/ True if a TYPENAME_TYPE was declared as an "enum". /
3780	#define TYPENAME_IS_ENUM_P(NODE) \
3781	(TREE_LANG_FLAG_0 (TYPENAME_TYPE_CHECK (NODE)))
3782
3783	/ True if a TYPENAME_TYPE was declared as a "class", "struct", or*
3784	"union". /*
3785	#define TYPENAME_IS_CLASS_P(NODE) \
3786	(TREE_LANG_FLAG_1 (TYPENAME_TYPE_CHECK (NODE)))
3787
3788	/ True if a TYPENAME_TYPE is in the process of being resolved. /
3789	#define TYPENAME_IS_RESOLVING_P(NODE) \
3790	(TREE_LANG_FLAG_2 (TYPENAME_TYPE_CHECK (NODE)))
3791
3792	/ [class.virtual]*
3793
3794	A class that declares or inherits a virtual function is called a
3795	polymorphic class. /*
3796	#define TYPE_POLYMORPHIC_P(NODE) (TREE_LANG_FLAG_2 (NODE))
3797
3798	/ Nonzero if this class has a virtual function table pointer. /
3799	#define TYPE_CONTAINS_VPTR_P(NODE) \
3800	(TYPE_POLYMORPHIC_P (NODE) \|\| CLASSTYPE_VBASECLASSES (NODE))
3801
3802	/ This flag is true of a local VAR_DECL if it was declared in a for*
3803	statement, but we are no longer in the scope of the for. /*
3804	#define DECL_DEAD_FOR_LOCAL(NODE) DECL_LANG_FLAG_7 (VAR_DECL_CHECK (NODE))
3805
3806	/ This flag is set on a VAR_DECL that is a DECL_DEAD_FOR_LOCAL*
3807	if we already emitted a warning about using it. /*
3808	#define DECL_ERROR_REPORTED(NODE) DECL_LANG_FLAG_0 (VAR_DECL_CHECK (NODE))
3809
3810	/ Nonzero if NODE is a FUNCTION_DECL (for a function with global*
3811	scope) declared in a local scope. /*
3812	#define DECL_LOCAL_FUNCTION_P(NODE) \
3813	DECL_LANG_FLAG_0 (FUNCTION_DECL_CHECK (NODE))
3814
3815	/ Nonzero if NODE is the target for genericization of 'break' stmts. /
3816	#define LABEL_DECL_BREAK(NODE) \
3817	DECL_LANG_FLAG_0 (LABEL_DECL_CHECK (NODE))
3818
3819	/ Nonzero if NODE is the target for genericization of 'continue' stmts. /
3820	#define LABEL_DECL_CONTINUE(NODE) \
3821	DECL_LANG_FLAG_1 (LABEL_DECL_CHECK (NODE))
3822
3823	/ Nonzero if NODE is the target for genericization of 'return' stmts*
3824	in constructors/destructors of targetm.cxx.cdtor_returns_this targets. /*
3825	#define LABEL_DECL_CDTOR(NODE) \
3826	DECL_LANG_FLAG_2 (LABEL_DECL_CHECK (NODE))
3827
3828	/ True if NODE was declared with auto in its return type, but it has*
3829	started compilation and so the return type might have been changed by
3830	return type deduction; its declared return type should be found in
3831	DECL_STRUCT_FUNCTION(NODE)->language->x_auto_return_pattern. /*
3832	#define FNDECL_USED_AUTO(NODE) \
3833	TREE_LANG_FLAG_2 (FUNCTION_DECL_CHECK (NODE))
3834
3835	/ Nonzero if NODE is a DECL which we know about but which has not*
3836	been explicitly declared, such as a built-in function or a friend
3837	declared inside a class. In the latter case DECL_HIDDEN_FRIEND_P
3838	will be set. /*
3839	#define DECL_ANTICIPATED(NODE) \
3840	(DECL_LANG_SPECIFIC (TYPE_FUNCTION_OR_TEMPLATE_DECL_CHECK (NODE)) \
3841	->u.base.anticipated_p)
3842
3843	/ Is DECL NODE a hidden name? /
3844	#define DECL_HIDDEN_P(NODE) \
3845	(DECL_LANG_SPECIFIC (NODE) && TYPE_FUNCTION_OR_TEMPLATE_DECL_P (NODE) \
3846	&& DECL_ANTICIPATED (NODE))
3847
3848	/ True if this is a hidden class type. /
3849	#define TYPE_HIDDEN_P(NODE) \
3850	(DECL_LANG_SPECIFIC (TYPE_NAME (NODE)) \
3851	&& DECL_ANTICIPATED (TYPE_NAME (NODE)))
3852
3853	/ True for artificial decls added for OpenMP privatized non-static*
3854	data members. /*
3855	#define DECL_OMP_PRIVATIZED_MEMBER(NODE) \
3856	(DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE))->u.base.anticipated_p)
3857
3858	/ Nonzero if NODE is a FUNCTION_DECL which was declared as a friend*
3859	within a class but has not been declared in the surrounding scope.
3860	The function is invisible except via argument dependent lookup. /*
3861	#define DECL_HIDDEN_FRIEND_P(NODE) \
3862	(LANG_DECL_FN_CHECK (DECL_COMMON_CHECK (NODE))->hidden_friend_p)
3863
3864	/ Nonzero if NODE is an artificial FUNCTION_DECL for*
3865	#pragma omp declare reduction. /*
3866	#define DECL_OMP_DECLARE_REDUCTION_P(NODE) \
3867	(LANG_DECL_FN_CHECK (DECL_COMMON_CHECK (NODE))->omp_declare_reduction_p)
3868
3869	/ Nonzero if DECL has been declared threadprivate by*
3870	#pragma omp threadprivate. /*
3871	#define CP_DECL_THREADPRIVATE_P(DECL) \
3872	(DECL_LANG_SPECIFIC (VAR_DECL_CHECK (DECL))->u.base.threadprivate_or_deleted_p)
3873
3874	/ Nonzero if NODE is a VAR_DECL which has been declared inline. /
3875	#define DECL_VAR_DECLARED_INLINE_P(NODE) \
3876	(DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE)) \
3877	? DECL_LANG_SPECIFIC (NODE)->u.base.var_declared_inline_p \
3878	: false)
3879	#define SET_DECL_VAR_DECLARED_INLINE_P(NODE) \
3880	(DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE))->u.base.var_declared_inline_p \
3881	= true)
3882
3883	/ True if NODE is a constant variable with a value-dependent initializer. /
3884	#define DECL_DEPENDENT_INIT_P(NODE) \
3885	(DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE)) \
3886	&& DECL_LANG_SPECIFIC (NODE)->u.base.dependent_init_p)
3887	#define SET_DECL_DEPENDENT_INIT_P(NODE, X) \
3888	(DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE))->u.base.dependent_init_p = (X))
3889
3890	/ Nonzero if NODE is an artificial VAR_DECL for a C++17 structured binding*
3891	declaration or one of VAR_DECLs for the user identifiers in it. /*
3892	#define DECL_DECOMPOSITION_P(NODE) \
3893	(VAR_P (NODE) && DECL_LANG_SPECIFIC (NODE) \
3894	? DECL_LANG_SPECIFIC (NODE)->u.base.selector == lds_decomp \
3895	: false)
3896
3897	/ The underlying artificial VAR_DECL for structured binding. /
3898	#define DECL_DECOMP_BASE(NODE) \
3899	(LANG_DECL_DECOMP_CHECK (NODE)->base)
3900
3901	/ Nonzero if NODE is an inline VAR_DECL. In C++17, static data members*
3902	declared with constexpr specifier are implicitly inline variables. /*
3903	#define DECL_INLINE_VAR_P(NODE) \
3904	(DECL_VAR_DECLARED_INLINE_P (NODE) \
3905	\|\| (cxx_dialect >= cxx17 \
3906	&& DECL_DECLARED_CONSTEXPR_P (NODE) \
3907	&& DECL_CLASS_SCOPE_P (NODE)))
3908
3909	/ Nonzero if DECL was declared with '= delete'. /
3910	#define DECL_DELETED_FN(DECL) \
3911	(LANG_DECL_FN_CHECK (DECL)->min.base.threadprivate_or_deleted_p)
3912
3913	/ Nonzero if DECL was declared with '= default' (maybe implicitly). /
3914	#define DECL_DEFAULTED_FN(DECL) \
3915	(LANG_DECL_FN_CHECK (DECL)->defaulted_p)
3916
3917	/ Nonzero if DECL is explicitly defaulted in the class body. /
3918	#define DECL_DEFAULTED_IN_CLASS_P(DECL) \
3919	(DECL_DEFAULTED_FN (DECL) && DECL_INITIALIZED_IN_CLASS_P (DECL))
3920	/ Nonzero if DECL was defaulted outside the class body. /
3921	#define DECL_DEFAULTED_OUTSIDE_CLASS_P(DECL) \
3922	(DECL_DEFAULTED_FN (DECL) \
3923	&& !(DECL_ARTIFICIAL (DECL) \|\| DECL_INITIALIZED_IN_CLASS_P (DECL)))
3924
3925	/ Record whether a typedef for type `int' was actually `signed int'. /
3926	#define C_TYPEDEF_EXPLICITLY_SIGNED(EXP) DECL_LANG_FLAG_1 (EXP)
3927
3928	/ Returns nonzero if DECL has external linkage, as specified by the*
3929	language standard. (This predicate may hold even when the
3930	corresponding entity is not actually given external linkage in the
3931	object file; see decl_linkage for details.) /*
3932	#define DECL_EXTERNAL_LINKAGE_P(DECL) \
3933	(decl_linkage (DECL) == lk_external)
3934
3935	/ Keep these codes in ascending code order. /
3936
3937	#define INTEGRAL_CODE_P(CODE) \
3938	((CODE) == ENUMERAL_TYPE \
3939	\|\| (CODE) == BOOLEAN_TYPE \
3940	\|\| (CODE) == INTEGER_TYPE)
3941
3942	/ [basic.fundamental]*
3943
3944	Types bool, char, wchar_t, and the signed and unsigned integer types
3945	are collectively called integral types.
3946
3947	Note that INTEGRAL_TYPE_P, as defined in tree.h, allows enumeration
3948	types as well, which is incorrect in C++. Keep these checks in
3949	ascending code order. /*
3950	#define CP_INTEGRAL_TYPE_P(TYPE) \
3951	(TREE_CODE (TYPE) == BOOLEAN_TYPE \
3952	\|\| TREE_CODE (TYPE) == INTEGER_TYPE)
3953
3954	/ Returns true if TYPE is an integral or enumeration name. Keep*
3955	these checks in ascending code order. /*
3956	#define INTEGRAL_OR_ENUMERATION_TYPE_P(TYPE) \
3957	(TREE_CODE (TYPE) == ENUMERAL_TYPE \|\| CP_INTEGRAL_TYPE_P (TYPE))
3958
3959	/ Returns true if TYPE is an integral or unscoped enumeration type. /
3960	#define INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P(TYPE) \
3961	(UNSCOPED_ENUM_P (TYPE) \|\| CP_INTEGRAL_TYPE_P (TYPE))
3962
3963	/ True if the class type TYPE is a literal type. /
3964	#define CLASSTYPE_LITERAL_P(TYPE) \
3965	(LANG_TYPE_CLASS_CHECK (TYPE)->is_literal)
3966
3967	/ [basic.fundamental]*
3968
3969	Integral and floating types are collectively called arithmetic
3970	types.
3971
3972	As a GNU extension, we also accept complex types.
3973
3974	Keep these checks in ascending code order. /*
3975	#define ARITHMETIC_TYPE_P(TYPE) \
3976	(CP_INTEGRAL_TYPE_P (TYPE) \
3977	\|\| TREE_CODE (TYPE) == REAL_TYPE \
3978	\|\| TREE_CODE (TYPE) == COMPLEX_TYPE)
3979
3980	/ True iff TYPE is cv decltype(nullptr). /
3981	#define NULLPTR_TYPE_P(TYPE) (TREE_CODE (TYPE) == NULLPTR_TYPE)
3982
3983	/ [basic.types]*
3984
3985	Arithmetic types, enumeration types, pointer types,
3986	pointer-to-member types, and std::nullptr_t are collectively called
3987	scalar types.
3988
3989	Keep these checks in ascending code order. /*
3990	#define SCALAR_TYPE_P(TYPE) \
3991	(TYPE_PTRDATAMEM_P (TYPE) \
3992	\|\| TREE_CODE (TYPE) == ENUMERAL_TYPE \
3993	\|\| ARITHMETIC_TYPE_P (TYPE) \
3994	\|\| TYPE_PTR_P (TYPE) \
3995	\|\| TYPE_PTRMEMFUNC_P (TYPE) \
3996	\|\| NULLPTR_TYPE_P (TYPE))
3997
3998	/ Determines whether this type is a C++0x scoped enumeration*
3999	type. Scoped enumerations types are introduced via "enum class" or
4000	"enum struct", e.g.,
4001
4002	enum class Color {
4003	Red, Green, Blue
4004	};
4005
4006	Scoped enumeration types are different from normal (unscoped)
4007	enumeration types in several ways:
4008
4009	- The enumerators of a scoped enumeration type are only available
4010	within the scope of the enumeration type and not in the
4011	enclosing scope. For example, the Red color can be referred to
4012	with "Color::Red" but not "Red".
4013
4014	- Scoped enumerators and enumerations do not implicitly convert
4015	to integers or 'bool'.
4016
4017	- The underlying type of the enum is well-defined. /*
4018	#define SCOPED_ENUM_P(TYPE) \
4019	(TREE_CODE (TYPE) == ENUMERAL_TYPE && ENUM_IS_SCOPED (TYPE))
4020
4021	/ Determine whether this is an unscoped enumeration type. /
4022	#define UNSCOPED_ENUM_P(TYPE) \
4023	(TREE_CODE (TYPE) == ENUMERAL_TYPE && !ENUM_IS_SCOPED (TYPE))
4024
4025	/ Set the flag indicating whether an ENUMERAL_TYPE is a C++0x scoped*
4026	enumeration type (1) or a normal (unscoped) enumeration type
4027	(0). /*
4028	#define SET_SCOPED_ENUM_P(TYPE, VAL) \
4029	(ENUM_IS_SCOPED (TYPE) = (VAL))
4030
4031	#define SET_OPAQUE_ENUM_P(TYPE, VAL) \
4032	(ENUM_IS_OPAQUE (TYPE) = (VAL))
4033
4034	#define OPAQUE_ENUM_P(TYPE) \
4035	(TREE_CODE (TYPE) == ENUMERAL_TYPE && ENUM_IS_OPAQUE (TYPE))
4036
4037	/ Determines whether an ENUMERAL_TYPE has an explicit*
4038	underlying type. /*
4039	#define ENUM_FIXED_UNDERLYING_TYPE_P(NODE) (TYPE_LANG_FLAG_5 (NODE))
4040
4041	/ Returns the underlying type of the given enumeration type. The*
4042	underlying type is determined in different ways, depending on the
4043	properties of the enum:
4044
4045	- In C++0x, the underlying type can be explicitly specified, e.g.,
4046
4047	enum E1 : char { ... } // underlying type is char
4048
4049	- In a C++0x scoped enumeration, the underlying type is int
4050	unless otherwises specified:
4051
4052	enum class E2 { ... } // underlying type is int
4053
4054	- Otherwise, the underlying type is determined based on the
4055	values of the enumerators. In this case, the
4056	ENUM_UNDERLYING_TYPE will not be set until after the definition
4057	of the enumeration is completed by finish_enum. /*
4058	#define ENUM_UNDERLYING_TYPE(TYPE) \
4059	TREE_TYPE (ENUMERAL_TYPE_CHECK (TYPE))
4060
4061	/ [dcl.init.aggr]*
4062
4063	An aggregate is an array or a class with no user-provided
4064	constructors, no brace-or-equal-initializers for non-static data
4065	members, no private or protected non-static data members, no
4066	base classes, and no virtual functions.
4067
4068	As an extension, we also treat vectors as aggregates. Keep these
4069	checks in ascending code order. /*
4070	#define CP_AGGREGATE_TYPE_P(TYPE) \
4071	(TREE_CODE (TYPE) == VECTOR_TYPE \
4072	\|\|TREE_CODE (TYPE) == ARRAY_TYPE \
4073	\|\| (CLASS_TYPE_P (TYPE) && !CLASSTYPE_NON_AGGREGATE (TYPE)))
4074
4075	/ Nonzero for a class type means that the class type has a*
4076	user-declared constructor. /*
4077	#define TYPE_HAS_USER_CONSTRUCTOR(NODE) (TYPE_LANG_FLAG_1 (NODE))
4078
4079	/ Nonzero means that the FUNCTION_TYPE or METHOD_TYPE has a*
4080	late-specified return type. /*
4081	#define TYPE_HAS_LATE_RETURN_TYPE(NODE) \
4082	(TYPE_LANG_FLAG_2 (FUNC_OR_METHOD_CHECK (NODE)))
4083
4084	/ When appearing in an INDIRECT_REF, it means that the tree structure*
4085	underneath is actually a call to a constructor. This is needed
4086	when the constructor must initialize local storage (which can
4087	be automatically destroyed), rather than allowing it to allocate
4088	space from the heap.
4089
4090	When appearing in a SAVE_EXPR, it means that underneath
4091	is a call to a constructor.
4092
4093	When appearing in a CONSTRUCTOR, the expression is a
4094	compound literal.
4095
4096	When appearing in a FIELD_DECL, it means that this field
4097	has been duly initialized in its constructor. /*
4098	#define TREE_HAS_CONSTRUCTOR(NODE) (TREE_LANG_FLAG_4 (NODE))
4099
4100	/ True if NODE is a brace-enclosed initializer. /
4101	#define BRACE_ENCLOSED_INITIALIZER_P(NODE) \
4102	(TREE_CODE (NODE) == CONSTRUCTOR && TREE_TYPE (NODE) == init_list_type_node)
4103
4104	/ True if NODE is a compound-literal, i.e., a brace-enclosed*
4105	initializer cast to a particular type. /*
4106	#define COMPOUND_LITERAL_P(NODE) \
4107	(TREE_CODE (NODE) == CONSTRUCTOR && TREE_HAS_CONSTRUCTOR (NODE))
4108
4109	#define EMPTY_CONSTRUCTOR_P(NODE) (TREE_CODE (NODE) == CONSTRUCTOR \
4110	&& vec_safe_is_empty(CONSTRUCTOR_ELTS(NODE))\
4111	&& !TREE_HAS_CONSTRUCTOR (NODE))
4112
4113	/ True if NODE is a init-list used as a direct-initializer, i.e.*
4114	B b{1,2}, not B b({1,2}) or B b = {1,2}. /*
4115	#define CONSTRUCTOR_IS_DIRECT_INIT(NODE) (TREE_LANG_FLAG_0 (CONSTRUCTOR_CHECK (NODE)))
4116
4117	/ True if an uninitialized element in NODE should not be treated as*
4118	implicitly value-initialized. Only used in constexpr evaluation. /*
4119	#define CONSTRUCTOR_NO_IMPLICIT_ZERO(NODE) \
4120	(TREE_LANG_FLAG_1 (CONSTRUCTOR_CHECK (NODE)))
4121
4122	/ True if this CONSTRUCTOR should not be used as a variable initializer*
4123	because it was loaded from a constexpr variable with mutable fields. /*
4124	#define CONSTRUCTOR_MUTABLE_POISON(NODE) \
4125	(TREE_LANG_FLAG_2 (CONSTRUCTOR_CHECK (NODE)))
4126
4127	/ True if this typed CONSTRUCTOR represents C99 compound-literal syntax rather*
4128	than C++11 functional cast syntax. /*
4129	#define CONSTRUCTOR_C99_COMPOUND_LITERAL(NODE) \
4130	(TREE_LANG_FLAG_3 (CONSTRUCTOR_CHECK (NODE)))
4131
4132	#define DIRECT_LIST_INIT_P(NODE) \
4133	(BRACE_ENCLOSED_INITIALIZER_P (NODE) && CONSTRUCTOR_IS_DIRECT_INIT (NODE))
4134
4135	/ True if NODE represents a conversion for direct-initialization in a*
4136	template. Set by perform_implicit_conversion_flags. /*
4137	#define IMPLICIT_CONV_EXPR_DIRECT_INIT(NODE) \
4138	(TREE_LANG_FLAG_0 (IMPLICIT_CONV_EXPR_CHECK (NODE)))
4139
4140	/ True if NODE represents a dependent conversion of a non-type template*
4141	argument. Set by maybe_convert_nontype_argument. /*
4142	#define IMPLICIT_CONV_EXPR_NONTYPE_ARG(NODE) \
4143	(TREE_LANG_FLAG_1 (IMPLICIT_CONV_EXPR_CHECK (NODE)))
4144
4145	/ Nonzero means that an object of this type can not be initialized using*
4146	an initializer list. /*
4147	#define CLASSTYPE_NON_AGGREGATE(NODE) \
4148	(LANG_TYPE_CLASS_CHECK (NODE)->non_aggregate)
4149	#define TYPE_NON_AGGREGATE_CLASS(NODE) \
4150	(CLASS_TYPE_P (NODE) && CLASSTYPE_NON_AGGREGATE (NODE))
4151
4152	/ Nonzero if there is a non-trivial X::op=(cv X&) for this class. /
4153	#define TYPE_HAS_COMPLEX_COPY_ASSIGN(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_complex_copy_assign)
4154
4155	/ Nonzero if there is a non-trivial X::X(cv X&) for this class. /
4156	#define TYPE_HAS_COMPLEX_COPY_CTOR(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_complex_copy_ctor)
4157
4158	/ Nonzero if there is a non-trivial X::op=(X&&) for this class. /
4159	#define TYPE_HAS_COMPLEX_MOVE_ASSIGN(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_complex_move_assign)
4160
4161	/ Nonzero if there is a non-trivial X::X(X&&) for this class. /
4162	#define TYPE_HAS_COMPLEX_MOVE_CTOR(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_complex_move_ctor)
4163
4164	/ Nonzero if there is no trivial default constructor for this class. /
4165	#define TYPE_HAS_COMPLEX_DFLT(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_complex_dflt)
4166
4167	/ Nonzero if TYPE has a trivial destructor. From [class.dtor]:*
4168
4169	A destructor is trivial if it is an implicitly declared
4170	destructor and if:
4171
4172	- all of the direct base classes of its class have trivial
4173	destructors,
4174
4175	- for all of the non-static data members of its class that are
4176	of class type (or array thereof), each such class has a
4177	trivial destructor. /*
4178	#define TYPE_HAS_TRIVIAL_DESTRUCTOR(NODE) \
4179	(!TYPE_HAS_NONTRIVIAL_DESTRUCTOR (NODE))
4180
4181	/ Nonzero for _TYPE node means that this type does not have a trivial*
4182	destructor. Therefore, destroying an object of this type will
4183	involve a call to a destructor. This can apply to objects of
4184	ARRAY_TYPE is the type of the elements needs a destructor. /*
4185	#define TYPE_HAS_NONTRIVIAL_DESTRUCTOR(NODE) \
4186	(TYPE_LANG_FLAG_4 (NODE))
4187
4188	/ Nonzero for class type means that the default constructor is trivial. /
4189	#define TYPE_HAS_TRIVIAL_DFLT(NODE) \
4190	(TYPE_HAS_DEFAULT_CONSTRUCTOR (NODE) && ! TYPE_HAS_COMPLEX_DFLT (NODE))
4191
4192	/ Nonzero for class type means that copy initialization of this type can use*
4193	a bitwise copy. /*
4194	#define TYPE_HAS_TRIVIAL_COPY_CTOR(NODE) \
4195	(TYPE_HAS_COPY_CTOR (NODE) && ! TYPE_HAS_COMPLEX_COPY_CTOR (NODE))
4196
4197	/ Nonzero for class type means that assignment of this type can use*
4198	a bitwise copy. /*
4199	#define TYPE_HAS_TRIVIAL_COPY_ASSIGN(NODE) \
4200	(TYPE_HAS_COPY_ASSIGN (NODE) && ! TYPE_HAS_COMPLEX_COPY_ASSIGN (NODE))
4201
4202	/ Returns true if NODE is a pointer-to-data-member. /
4203	#define TYPE_PTRDATAMEM_P(NODE) \
4204	(TREE_CODE (NODE) == OFFSET_TYPE)
4205	/ Returns true if NODE is a pointer. /
4206	#define TYPE_PTR_P(NODE) \
4207	(TREE_CODE (NODE) == POINTER_TYPE)
4208
4209	/ Returns true if NODE is an object type:*
4210
4211	[basic.types]
4212
4213	An object type is a (possibly cv-qualified) type that is not a
4214	function type, not a reference type, and not a void type.
4215
4216	Keep these checks in ascending order, for speed. /*
4217	#define TYPE_OBJ_P(NODE) \
4218	(TREE_CODE (NODE) != REFERENCE_TYPE \
4219	&& !VOID_TYPE_P (NODE) \
4220	&& TREE_CODE (NODE) != FUNCTION_TYPE \
4221	&& TREE_CODE (NODE) != METHOD_TYPE)
4222
4223	/ Returns true if NODE is a pointer to an object. Keep these checks*
4224	in ascending tree code order. /*
4225	#define TYPE_PTROB_P(NODE) \
4226	(TYPE_PTR_P (NODE) && TYPE_OBJ_P (TREE_TYPE (NODE)))
4227
4228	/ Returns true if NODE is a reference to an object. Keep these checks*
4229	in ascending tree code order. /*
4230	#define TYPE_REF_OBJ_P(NODE) \
4231	(TREE_CODE (NODE) == REFERENCE_TYPE && TYPE_OBJ_P (TREE_TYPE (NODE)))
4232
4233	/ Returns true if NODE is a pointer to an object, or a pointer to*
4234	void. Keep these checks in ascending tree code order. /*
4235	#define TYPE_PTROBV_P(NODE) \
4236	(TYPE_PTR_P (NODE) \
4237	&& !(TREE_CODE (TREE_TYPE (NODE)) == FUNCTION_TYPE \
4238	\|\| TREE_CODE (TREE_TYPE (NODE)) == METHOD_TYPE))
4239
4240	/ Returns true if NODE is a pointer to function type. /
4241	#define TYPE_PTRFN_P(NODE) \
4242	(TYPE_PTR_P (NODE) \
4243	&& TREE_CODE (TREE_TYPE (NODE)) == FUNCTION_TYPE)
4244
4245	/ Returns true if NODE is a reference to function type. /
4246	#define TYPE_REFFN_P(NODE) \
4247	(TREE_CODE (NODE) == REFERENCE_TYPE \
4248	&& TREE_CODE (TREE_TYPE (NODE)) == FUNCTION_TYPE)
4249
4250	/ Returns true if NODE is a pointer to member function type. /
4251	#define TYPE_PTRMEMFUNC_P(NODE) \
4252	(TREE_CODE (NODE) == RECORD_TYPE \
4253	&& TYPE_PTRMEMFUNC_FLAG (NODE))
4254
4255	#define TYPE_PTRMEMFUNC_FLAG(NODE) \
4256	(TYPE_LANG_FLAG_2 (RECORD_TYPE_CHECK (NODE)))
4257
4258	/ Returns true if NODE is a pointer-to-member. /
4259	#define TYPE_PTRMEM_P(NODE) \
4260	(TYPE_PTRDATAMEM_P (NODE) \|\| TYPE_PTRMEMFUNC_P (NODE))
4261
4262	/ Returns true if NODE is a pointer or a pointer-to-member. /
4263	#define TYPE_PTR_OR_PTRMEM_P(NODE) \
4264	(TYPE_PTR_P (NODE) \|\| TYPE_PTRMEM_P (NODE))
4265
4266	/ Indicates when overload resolution may resolve to a pointer to*
4267	member function. [expr.unary.op]/3 /*
4268	#define PTRMEM_OK_P(NODE) \
4269	TREE_LANG_FLAG_0 (TREE_CHECK3 ((NODE), ADDR_EXPR, OFFSET_REF, SCOPE_REF))
4270
4271	/ Get the POINTER_TYPE to the METHOD_TYPE associated with this*
4272	pointer to member function. TYPE_PTRMEMFUNC_P _must_ be true,
4273	before using this macro. /*
4274	#define TYPE_PTRMEMFUNC_FN_TYPE(NODE) \
4275	(cp_build_qualified_type (TREE_TYPE (TYPE_FIELDS (NODE)),\
4276	cp_type_quals (NODE)))
4277
4278	/ As above, but can be used in places that want an lvalue at the expense*
4279	of not necessarily having the correct cv-qualifiers. /*
4280	#define TYPE_PTRMEMFUNC_FN_TYPE_RAW(NODE) \
4281	(TREE_TYPE (TYPE_FIELDS (NODE)))
4282
4283	/ Returns `A' for a type like `int (A::)(double)' /*
4284	#define TYPE_PTRMEMFUNC_OBJECT_TYPE(NODE) \
4285	TYPE_METHOD_BASETYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (NODE)))
4286
4287	/ The canonical internal RECORD_TYPE from the POINTER_TYPE to*
4288	METHOD_TYPE. /*
4289	#define TYPE_PTRMEMFUNC_TYPE(NODE) \
4290	TYPE_LANG_SLOT_1 (NODE)
4291
4292	/ For a pointer-to-member type of the form `T X::', this is `X'.
4293	For a type like `void (X::)() const', this type is `X', not `const*
4294	X'. To get at the `const X' you have to look at the
4295	TYPE_PTRMEM_POINTED_TO_TYPE; there, the first parameter will have
4296	type `const X'. /
4297	#define TYPE_PTRMEM_CLASS_TYPE(NODE) \
4298	(TYPE_PTRDATAMEM_P (NODE) \
4299	? TYPE_OFFSET_BASETYPE (NODE) \
4300	: TYPE_PTRMEMFUNC_OBJECT_TYPE (NODE))
4301
4302	/ For a pointer-to-member type of the form `T X::', this is `T'. /*
4303	#define TYPE_PTRMEM_POINTED_TO_TYPE(NODE) \
4304	(TYPE_PTRDATAMEM_P (NODE) \
4305	? TREE_TYPE (NODE) \
4306	: TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (NODE)))
4307
4308	/ For a pointer-to-member constant `X::Y' this is the RECORD_TYPE for*
4309	`X'. /*
4310	#define PTRMEM_CST_CLASS(NODE) \
4311	TYPE_PTRMEM_CLASS_TYPE (TREE_TYPE (PTRMEM_CST_CHECK (NODE)))
4312
4313	/ For a pointer-to-member constant `X::Y' this is the _DECL for*
4314	`Y'. /*
4315	#define PTRMEM_CST_MEMBER(NODE) \
4316	(((ptrmem_cst_t)PTRMEM_CST_CHECK (NODE))->member)
4317
4318	/ The expression in question for a TYPEOF_TYPE. /
4319	#define TYPEOF_TYPE_EXPR(NODE) (TYPE_VALUES_RAW (TYPEOF_TYPE_CHECK (NODE)))
4320
4321	/ The type in question for an UNDERLYING_TYPE. /
4322	#define UNDERLYING_TYPE_TYPE(NODE) \
4323	(TYPE_VALUES_RAW (UNDERLYING_TYPE_CHECK (NODE)))
4324
4325	/ The type in question for BASES. /
4326	#define BASES_TYPE(NODE) \
4327	(TYPE_VALUES_RAW (BASES_CHECK (NODE)))
4328
4329	#define BASES_DIRECT(NODE) \
4330	TREE_LANG_FLAG_0 (BASES_CHECK (NODE))
4331
4332	/ The expression in question for a DECLTYPE_TYPE. /
4333	#define DECLTYPE_TYPE_EXPR(NODE) (TYPE_VALUES_RAW (DECLTYPE_TYPE_CHECK (NODE)))
4334
4335	/ Whether the DECLTYPE_TYPE_EXPR of NODE was originally parsed as an*
4336	id-expression or a member-access expression. When false, it was
4337	parsed as a full expression. /*
4338	#define DECLTYPE_TYPE_ID_EXPR_OR_MEMBER_ACCESS_P(NODE) \
4339	(DECLTYPE_TYPE_CHECK (NODE))->type_common.string_flag
4340
4341	/ These flags indicate that we want different semantics from normal*
4342	decltype: lambda capture just drops references, init capture
4343	uses auto semantics, lambda proxies look through implicit dereference. /*
4344	#define DECLTYPE_FOR_LAMBDA_CAPTURE(NODE) \
4345	TREE_LANG_FLAG_0 (DECLTYPE_TYPE_CHECK (NODE))
4346	#define DECLTYPE_FOR_INIT_CAPTURE(NODE) \
4347	TREE_LANG_FLAG_1 (DECLTYPE_TYPE_CHECK (NODE))
4348	#define DECLTYPE_FOR_LAMBDA_PROXY(NODE) \
4349	TREE_LANG_FLAG_2 (DECLTYPE_TYPE_CHECK (NODE))
4350	#define DECLTYPE_FOR_REF_CAPTURE(NODE) \
4351	TREE_LANG_FLAG_3 (DECLTYPE_TYPE_CHECK (NODE))
4352
4353	/ Nonzero for VAR_DECL and FUNCTION_DECL node means that `extern' was*
4354	specified in its declaration. This can also be set for an
4355	erroneously declared PARM_DECL. /*
4356	#define DECL_THIS_EXTERN(NODE) \
4357	DECL_LANG_FLAG_2 (VAR_FUNCTION_OR_PARM_DECL_CHECK (NODE))
4358
4359	/ Nonzero for VAR_DECL and FUNCTION_DECL node means that `static' was*
4360	specified in its declaration. This can also be set for an
4361	erroneously declared PARM_DECL. /*
4362	#define DECL_THIS_STATIC(NODE) \
4363	DECL_LANG_FLAG_6 (VAR_FUNCTION_OR_PARM_DECL_CHECK (NODE))
4364
4365	/ Nonzero for FIELD_DECL node means that this field is a lambda capture*
4366	field for an array of runtime bound. /*
4367	#define DECL_VLA_CAPTURE_P(NODE) \
4368	DECL_LANG_FLAG_1 (FIELD_DECL_CHECK (NODE))
4369
4370	/ Nonzero for PARM_DECL node means that this is an array function*
4371	parameter, i.e, a[] rather than a. /
4372	#define DECL_ARRAY_PARAMETER_P(NODE) \
4373	DECL_LANG_FLAG_1 (PARM_DECL_CHECK (NODE))
4374
4375	/ Nonzero for a FIELD_DECL who's NSMDI is currently being*
4376	instantiated. /*
4377	#define DECL_INSTANTIATING_NSDMI_P(NODE) \
4378	DECL_LANG_FLAG_2 (FIELD_DECL_CHECK (NODE))
4379
4380	/ Nonzero for FIELD_DECL node means that this field is a base class*
4381	of the parent object, as opposed to a member field. /*
4382	#define DECL_FIELD_IS_BASE(NODE) \
4383	DECL_LANG_FLAG_6 (FIELD_DECL_CHECK (NODE))
4384
4385	/ Nonzero for FIELD_DECL node means that this field is a simple (no*
4386	explicit initializer) lambda capture field, making it invisible to
4387	name lookup in unevaluated contexts. /*
4388	#define DECL_NORMAL_CAPTURE_P(NODE) \
4389	DECL_LANG_FLAG_7 (FIELD_DECL_CHECK (NODE))
4390
4391	/ Nonzero if TYPE is an anonymous union or struct type. We have to use a*
4392	flag for this because "A union for which objects or pointers are
4393	declared is not an anonymous union" [class.union]. /*
4394	#define ANON_AGGR_TYPE_P(NODE) \
4395	(CLASS_TYPE_P (NODE) && LANG_TYPE_CLASS_CHECK (NODE)->anon_aggr)
4396	#define SET_ANON_AGGR_TYPE_P(NODE) \
4397	(LANG_TYPE_CLASS_CHECK (NODE)->anon_aggr = 1)
4398
4399	/ Nonzero if TYPE is an anonymous union type. /
4400	#define ANON_UNION_TYPE_P(NODE) \
4401	(TREE_CODE (NODE) == UNION_TYPE && ANON_AGGR_TYPE_P (NODE))
4402
4403	/ Define fields and accessors for nodes representing declared names. /
4404
4405	/ Nonzero if TYPE is an unnamed class with a typedef for linkage purposes. /
4406	#define TYPE_WAS_UNNAMED(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->was_anonymous)
4407
4408	/ C++: all of these are overloaded! These apply only to TYPE_DECLs. /
4409
4410	/ The format of each node in the DECL_FRIENDLIST is as follows:*
4411
4412	The TREE_PURPOSE will be the name of a function, i.e., an
4413	IDENTIFIER_NODE. The TREE_VALUE will be itself a TREE_LIST, whose
4414	TREE_VALUEs are friends with the given name. /*
4415	#define DECL_FRIENDLIST(NODE) (DECL_INITIAL (NODE))
4416	#define FRIEND_NAME(LIST) (TREE_PURPOSE (LIST))
4417	#define FRIEND_DECLS(LIST) (TREE_VALUE (LIST))
4418
4419	/ The DECL_ACCESS, if non-NULL, is a TREE_LIST. The TREE_PURPOSE of*
4420	each node is a type; the TREE_VALUE is the access granted for this
4421	DECL in that type. The DECL_ACCESS is set by access declarations.
4422	For example, if a member that would normally be public in a
4423	derived class is made protected, then the derived class and the
4424	protected_access_node will appear in the DECL_ACCESS for the node. /*
4425	#define DECL_ACCESS(NODE) (LANG_DECL_U2_CHECK (NODE, 0)->access)
4426
4427	/ Nonzero if the FUNCTION_DECL is a global constructor. /
4428	#define DECL_GLOBAL_CTOR_P(NODE) \
4429	(LANG_DECL_FN_CHECK (NODE)->global_ctor_p)
4430
4431	/ Nonzero if the FUNCTION_DECL is a global destructor. /
4432	#define DECL_GLOBAL_DTOR_P(NODE) \
4433	(LANG_DECL_FN_CHECK (NODE)->global_dtor_p)
4434
4435	/ Accessor macros for C++ template decl nodes. /
4436
4437	/ The DECL_TEMPLATE_PARMS are a list. The TREE_PURPOSE of each node*
4438	is a INT_CST whose TREE_INT_CST_LOW indicates the level of the
4439	template parameters, with 1 being the outermost set of template
4440	parameters. The TREE_VALUE is a vector, whose elements are the
4441	template parameters at each level. Each element in the vector is a
4442	TREE_LIST, whose TREE_VALUE is a PARM_DECL (if the parameter is a
4443	non-type parameter), or a TYPE_DECL (if the parameter is a type
4444	parameter). The TREE_PURPOSE is the default value, if any. The
4445	TEMPLATE_PARM_INDEX for the parameter is available as the
4446	DECL_INITIAL (for a PARM_DECL) or as the TREE_TYPE (for a
4447	TYPE_DECL).
4448
4449	FIXME: CONST_CAST_TREE is a hack that hopefully will go away after
4450	tree is converted to C++ class hiearchy. /*
4451	#define DECL_TEMPLATE_PARMS(NODE) \
4452	((struct tree_template_decl *)CONST_CAST_TREE (TEMPLATE_DECL_CHECK (NODE)))->arguments
4453	#define DECL_INNERMOST_TEMPLATE_PARMS(NODE) \
4454	INNERMOST_TEMPLATE_PARMS (DECL_TEMPLATE_PARMS (NODE))
4455	#define DECL_NTPARMS(NODE) \
4456	TREE_VEC_LENGTH (DECL_INNERMOST_TEMPLATE_PARMS (NODE))
4457	/ For function, method, class-data templates.*
4458
4459	FIXME: CONST_CAST_TREE is a hack that hopefully will go away after
4460	tree is converted to C++ class hiearchy. /*
4461	#define DECL_TEMPLATE_RESULT(NODE) \
4462	((struct tree_template_decl *)CONST_CAST_TREE(TEMPLATE_DECL_CHECK (NODE)))->result
4463	/ For a function template at namespace scope, DECL_TEMPLATE_INSTANTIATIONS*
4464	lists all instantiations and specializations of the function so that
4465	tsubst_friend_function can reassign them to another template if we find
4466	that the namespace-scope template is really a partial instantiation of a
4467	friend template.
4468
4469	For a class template the DECL_TEMPLATE_INSTANTIATIONS lists holds
4470	all instantiations and specializations of the class type, including
4471	partial instantiations and partial specializations, so that if we
4472	explicitly specialize a partial instantiation we can walk the list
4473	in maybe_process_partial_specialization and reassign them or complain
4474	as appropriate.
4475
4476	In both cases, the TREE_PURPOSE of each node contains the arguments
4477	used; the TREE_VALUE contains the generated variable. The template
4478	arguments are always complete. For example, given:
4479
4480	template <class T> struct S1 {
4481	template <class U> struct S2 {};
4482	template <class U> struct S2<U> {};*
4483	};
4484
4485	the record for the partial specialization will contain, as its
4486	argument list, { {T}, {U} }, and will be on the*
4487	DECL_TEMPLATE_INSTANTIATIONS list for `template <class T> template
4488	<class U> struct S1<T>::S2'.
4489
4490	This list is not used for other templates. /*
4491	#define DECL_TEMPLATE_INSTANTIATIONS(NODE) \
4492	DECL_SIZE_UNIT (TEMPLATE_DECL_CHECK (NODE))
4493
4494	/ For a class template, this list contains the partial*
4495	specializations of this template. (Full specializations are not
4496	recorded on this list.) The TREE_PURPOSE holds the arguments used
4497	in the partial specialization (e.g., for `template <class T> struct
4498	S<T, int>' this will be `T, int'.) The arguments will also include
4499	any outer template arguments. The TREE_VALUE holds the TEMPLATE_DECL
4500	for the partial specialization. The TREE_TYPE is the _TYPE node for
4501	the partial specialization.
4502
4503	This list is not used for other templates. /*
4504	#define DECL_TEMPLATE_SPECIALIZATIONS(NODE) \
4505	DECL_SIZE (TEMPLATE_DECL_CHECK (NODE))
4506
4507	/ Nonzero for a DECL which is actually a template parameter. Keep*
4508	these checks in ascending tree code order. /*
4509	#define DECL_TEMPLATE_PARM_P(NODE) \
4510	(DECL_LANG_FLAG_0 (NODE) \
4511	&& (TREE_CODE (NODE) == CONST_DECL \
4512	\|\| TREE_CODE (NODE) == PARM_DECL \
4513	\|\| TREE_CODE (NODE) == TYPE_DECL \
4514	\|\| TREE_CODE (NODE) == TEMPLATE_DECL))
4515
4516	/ Mark NODE as a template parameter. /
4517	#define SET_DECL_TEMPLATE_PARM_P(NODE) \
4518	(DECL_LANG_FLAG_0 (NODE) = 1)
4519
4520	/ Nonzero if NODE is a template template parameter. /
4521	#define DECL_TEMPLATE_TEMPLATE_PARM_P(NODE) \
4522	(TREE_CODE (NODE) == TEMPLATE_DECL && DECL_TEMPLATE_PARM_P (NODE))
4523
4524	/ Nonzero for a DECL that represents a function template. /
4525	#define DECL_FUNCTION_TEMPLATE_P(NODE) \
4526	(TREE_CODE (NODE) == TEMPLATE_DECL \
4527	&& DECL_TEMPLATE_RESULT (NODE) != NULL_TREE \
4528	&& TREE_CODE (DECL_TEMPLATE_RESULT (NODE)) == FUNCTION_DECL)
4529
4530	/ Nonzero for a DECL that represents a class template or alias*
4531	template. /*
4532	#define DECL_TYPE_TEMPLATE_P(NODE) \
4533	(TREE_CODE (NODE) == TEMPLATE_DECL \
4534	&& DECL_TEMPLATE_RESULT (NODE) != NULL_TREE \
4535	&& TREE_CODE (DECL_TEMPLATE_RESULT (NODE)) == TYPE_DECL)
4536
4537	/ Nonzero for a DECL that represents a class template. /
4538	#define DECL_CLASS_TEMPLATE_P(NODE) \
4539	(DECL_TYPE_TEMPLATE_P (NODE) \
4540	&& DECL_IMPLICIT_TYPEDEF_P (DECL_TEMPLATE_RESULT (NODE)))
4541
4542	/ Nonzero for a TEMPLATE_DECL that represents an alias template. /
4543	#define DECL_ALIAS_TEMPLATE_P(NODE) \
4544	(DECL_TYPE_TEMPLATE_P (NODE) \
4545	&& !DECL_ARTIFICIAL (DECL_TEMPLATE_RESULT (NODE)))
4546
4547	/ Nonzero for a NODE which declares a type. /
4548	#define DECL_DECLARES_TYPE_P(NODE) \
4549	(TREE_CODE (NODE) == TYPE_DECL \|\| DECL_TYPE_TEMPLATE_P (NODE))
4550
4551	/ Nonzero if NODE declares a function. /
4552	#define DECL_DECLARES_FUNCTION_P(NODE) \
4553	(TREE_CODE (NODE) == FUNCTION_DECL \|\| DECL_FUNCTION_TEMPLATE_P (NODE))
4554
4555	/ Nonzero if NODE is the typedef implicitly generated for a type when*
4556	the type is declared. In C++, `struct S {};' is roughly
4557	equivalent to `struct S {}; typedef struct S S;' in C.
4558	DECL_IMPLICIT_TYPEDEF_P will hold for the typedef indicated in this
4559	example. In C++, there is a second implicit typedef for each
4560	class, called the injected-class-name, in the scope of `S' itself, so that
4561	you can say `S::S'. DECL_SELF_REFERENCE_P will hold for that typedef. /*
4562	#define DECL_IMPLICIT_TYPEDEF_P(NODE) \
4563	(TREE_CODE (NODE) == TYPE_DECL && DECL_LANG_FLAG_2 (NODE))
4564	#define SET_DECL_IMPLICIT_TYPEDEF_P(NODE) \
4565	(DECL_LANG_FLAG_2 (NODE) = 1)
4566	#define DECL_SELF_REFERENCE_P(NODE) \
4567	(TREE_CODE (NODE) == TYPE_DECL && DECL_LANG_FLAG_4 (NODE))
4568	#define SET_DECL_SELF_REFERENCE_P(NODE) \
4569	(DECL_LANG_FLAG_4 (NODE) = 1)
4570
4571	/ A `primary' template is one that has its own template header and is not*
4572	a partial specialization. A member function of a class template is a
4573	template, but not primary. A member template is primary. Friend
4574	templates are primary, too. /*
4575
4576	/ Returns the primary template corresponding to these parameters. /
4577	#define DECL_PRIMARY_TEMPLATE(NODE) \
4578	(TREE_TYPE (DECL_INNERMOST_TEMPLATE_PARMS (NODE)))
4579
4580	/ Returns nonzero if NODE is a primary template. /
4581	#define PRIMARY_TEMPLATE_P(NODE) (DECL_PRIMARY_TEMPLATE (NODE) == (NODE))
4582
4583	/ Nonzero iff NODE is a specialization of a template. The value*
4584	indicates the type of specializations:
4585
4586	1=implicit instantiation
4587
4588	2=partial or explicit specialization, e.g.:
4589
4590	template <> int min<int> (int, int),
4591
4592	3=explicit instantiation, e.g.:
4593
4594	template int min<int> (int, int);
4595
4596	Note that NODE will be marked as a specialization even if the
4597	template it is instantiating is not a primary template. For
4598	example, given:
4599
4600	template <typename T> struct O {
4601	void f();
4602	struct I {};
4603	};
4604
4605	both O<int>::f and O<int>::I will be marked as instantiations.
4606
4607	If DECL_USE_TEMPLATE is nonzero, then DECL_TEMPLATE_INFO will also
4608	be non-NULL. /*
4609	#define DECL_USE_TEMPLATE(NODE) (DECL_LANG_SPECIFIC (NODE)->u.base.use_template)
4610
4611	/ Like DECL_USE_TEMPLATE, but for class types. /
4612	#define CLASSTYPE_USE_TEMPLATE(NODE) \
4613	(LANG_TYPE_CLASS_CHECK (NODE)->use_template)
4614
4615	/ True if NODE is a specialization of a primary template. /
4616	#define CLASSTYPE_SPECIALIZATION_OF_PRIMARY_TEMPLATE_P(NODE) \
4617	(CLASS_TYPE_P (NODE) \
4618	&& CLASSTYPE_USE_TEMPLATE (NODE) \
4619	&& PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (NODE)))
4620
4621	#define DECL_TEMPLATE_INSTANTIATION(NODE) (DECL_USE_TEMPLATE (NODE) & 1)
4622	#define CLASSTYPE_TEMPLATE_INSTANTIATION(NODE) \
4623	(CLASSTYPE_USE_TEMPLATE (NODE) & 1)
4624
4625	#define DECL_TEMPLATE_SPECIALIZATION(NODE) (DECL_USE_TEMPLATE (NODE) == 2)
4626	#define SET_DECL_TEMPLATE_SPECIALIZATION(NODE) (DECL_USE_TEMPLATE (NODE) = 2)
4627
4628	/ Returns true for an explicit or partial specialization of a class*
4629	template. /*
4630	#define CLASSTYPE_TEMPLATE_SPECIALIZATION(NODE) \
4631	(CLASSTYPE_USE_TEMPLATE (NODE) == 2)
4632	#define SET_CLASSTYPE_TEMPLATE_SPECIALIZATION(NODE) \
4633	(CLASSTYPE_USE_TEMPLATE (NODE) = 2)
4634
4635	#define DECL_IMPLICIT_INSTANTIATION(NODE) (DECL_USE_TEMPLATE (NODE) == 1)
4636	#define SET_DECL_IMPLICIT_INSTANTIATION(NODE) (DECL_USE_TEMPLATE (NODE) = 1)
4637	#define CLASSTYPE_IMPLICIT_INSTANTIATION(NODE) \
4638	(CLASSTYPE_USE_TEMPLATE (NODE) == 1)
4639	#define SET_CLASSTYPE_IMPLICIT_INSTANTIATION(NODE) \
4640	(CLASSTYPE_USE_TEMPLATE (NODE) = 1)
4641
4642	#define DECL_EXPLICIT_INSTANTIATION(NODE) (DECL_USE_TEMPLATE (NODE) == 3)
4643	#define SET_DECL_EXPLICIT_INSTANTIATION(NODE) (DECL_USE_TEMPLATE (NODE) = 3)
4644	#define CLASSTYPE_EXPLICIT_INSTANTIATION(NODE) \
4645	(CLASSTYPE_USE_TEMPLATE (NODE) == 3)
4646	#define SET_CLASSTYPE_EXPLICIT_INSTANTIATION(NODE) \
4647	(CLASSTYPE_USE_TEMPLATE (NODE) = 3)
4648
4649	/ Nonzero if DECL is a friend function which is an instantiation*
4650	from the point of view of the compiler, but not from the point of
4651	view of the language. For example given:
4652	template <class T> struct S { friend void f(T) {}; };
4653	the declaration of `void f(int)' generated when S<int> is
4654	instantiated will not be a DECL_TEMPLATE_INSTANTIATION, but will be
4655	a DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION. /*
4656	#define DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION(DECL) \
4657	(DECL_LANG_SPECIFIC (DECL) && DECL_TEMPLATE_INFO (DECL) \
4658	&& !DECL_USE_TEMPLATE (DECL))
4659
4660	/ Nonzero if DECL is a function generated from a function 'temploid',*
4661	i.e. template, member of class template, or dependent friend. /*
4662	#define DECL_TEMPLOID_INSTANTIATION(DECL) \
4663	(DECL_TEMPLATE_INSTANTIATION (DECL) \
4664	\|\| DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (DECL))
4665
4666	/ Nonzero if DECL is either defined implicitly by the compiler or*
4667	generated from a temploid. /*
4668	#define DECL_GENERATED_P(DECL) \
4669	(DECL_TEMPLOID_INSTANTIATION (DECL) \|\| DECL_DEFAULTED_FN (DECL))
4670
4671	/ Nonzero iff we are currently processing a declaration for an*
4672	entity with its own template parameter list, and which is not a
4673	full specialization. /*
4674	#define PROCESSING_REAL_TEMPLATE_DECL_P() \
4675	(processing_template_decl > template_class_depth (current_scope ()))
4676
4677	/ Nonzero if this VAR_DECL or FUNCTION_DECL has already been*
4678	instantiated, i.e. its definition has been generated from the
4679	pattern given in the template. /*
4680	#define DECL_TEMPLATE_INSTANTIATED(NODE) \
4681	DECL_LANG_FLAG_1 (VAR_OR_FUNCTION_DECL_CHECK (NODE))
4682
4683	/ We know what we're doing with this decl now. /
4684	#define DECL_INTERFACE_KNOWN(NODE) DECL_LANG_FLAG_5 (NODE)
4685
4686	/ DECL_EXTERNAL must be set on a decl until the decl is actually emitted,*
4687	so that assemble_external will work properly. So we have this flag to
4688	tell us whether the decl is really not external.
4689
4690	This flag does not indicate whether or not the decl is defined in the
4691	current translation unit; it indicates whether or not we should emit the
4692	decl at the end of compilation if it is defined and needed. /*
4693	#define DECL_NOT_REALLY_EXTERN(NODE) \
4694	(DECL_LANG_SPECIFIC (NODE)->u.base.not_really_extern)
4695
4696	#define DECL_REALLY_EXTERN(NODE) \
4697	(DECL_EXTERNAL (NODE) \
4698	&& (!DECL_LANG_SPECIFIC (NODE) \|\| !DECL_NOT_REALLY_EXTERN (NODE)))
4699
4700	/ A thunk is a stub function.*
4701
4702	A thunk is an alternate entry point for an ordinary FUNCTION_DECL.
4703	The address of the ordinary FUNCTION_DECL is given by the
4704	DECL_INITIAL, which is always an ADDR_EXPR whose operand is a
4705	FUNCTION_DECL. The job of the thunk is to either adjust the this
4706	pointer before transferring control to the FUNCTION_DECL, or call
4707	FUNCTION_DECL and then adjust the result value. Note, the result
4708	pointer adjusting thunk must perform a call to the thunked
4709	function, (or be implemented via passing some invisible parameter
4710	to the thunked function, which is modified to perform the
4711	adjustment just before returning).
4712
4713	A thunk may perform either, or both, of the following operations:
4714
4715	o Adjust the this or result pointer by a constant offset.
4716	o Adjust the this or result pointer by looking up a vcall or vbase offset
4717	in the vtable.
4718
4719	A this pointer adjusting thunk converts from a base to a derived
4720	class, and hence adds the offsets. A result pointer adjusting thunk
4721	converts from a derived class to a base, and hence subtracts the
4722	offsets. If both operations are performed, then the constant
4723	adjustment is performed first for this pointer adjustment and last
4724	for the result pointer adjustment.
4725
4726	The constant adjustment is given by THUNK_FIXED_OFFSET. If the
4727	vcall or vbase offset is required, THUNK_VIRTUAL_OFFSET is
4728	used. For this pointer adjusting thunks, it is the vcall offset
4729	into the vtable. For result pointer adjusting thunks it is the
4730	binfo of the virtual base to convert to. Use that binfo's vbase
4731	offset.
4732
4733	It is possible to have equivalent covariant thunks. These are
4734	distinct virtual covariant thunks whose vbase offsets happen to
4735	have the same value. THUNK_ALIAS is used to pick one as the
4736	canonical thunk, which will get all the this pointer adjusting
4737	thunks attached to it. /*
4738
4739	/ An integer indicating how many bytes should be subtracted from the*
4740	this or result pointer when this function is called. /*
4741	#define THUNK_FIXED_OFFSET(DECL) \
4742	(DECL_LANG_SPECIFIC (THUNK_FUNCTION_CHECK (DECL))->u.fn.u5.fixed_offset)
4743
4744	/ A tree indicating how to perform the virtual adjustment. For a this*
4745	adjusting thunk it is the number of bytes to be added to the vtable
4746	to find the vcall offset. For a result adjusting thunk, it is the
4747	binfo of the relevant virtual base. If NULL, then there is no
4748	virtual adjust. (The vptr is always located at offset zero from
4749	the this or result pointer.) (If the covariant type is within the
4750	class hierarchy being laid out, the vbase index is not yet known
4751	at the point we need to create the thunks, hence the need to use
4752	binfos.) /*
4753
4754	#define THUNK_VIRTUAL_OFFSET(DECL) \
4755	(LANG_DECL_U2_CHECK (FUNCTION_DECL_CHECK (DECL), 0)->access)
4756
4757	/ A thunk which is equivalent to another thunk. /
4758	#define THUNK_ALIAS(DECL) \
4759	(DECL_LANG_SPECIFIC (FUNCTION_DECL_CHECK (DECL))->u.min.template_info)
4760
4761	/ For thunk NODE, this is the FUNCTION_DECL thunked to. It is*
4762	possible for the target to be a thunk too. /*
4763	#define THUNK_TARGET(NODE) \
4764	(LANG_DECL_FN_CHECK (NODE)->befriending_classes)
4765
4766	/ True for a SCOPE_REF iff the "template" keyword was used to*
4767	indicate that the qualified name denotes a template. /*
4768	#define QUALIFIED_NAME_IS_TEMPLATE(NODE) \
4769	(TREE_LANG_FLAG_1 (SCOPE_REF_CHECK (NODE)))
4770
4771	/ True for an OMP_ATOMIC that has dependent parameters. These are stored*
4772	as an expr in operand 1, and integer_zero_node in operand 0. /*
4773	#define OMP_ATOMIC_DEPENDENT_P(NODE) \
4774	(TREE_CODE (TREE_OPERAND (OMP_ATOMIC_CHECK (NODE), 0)) == INTEGER_CST)
4775
4776	/ Used while gimplifying continue statements bound to OMP_FOR nodes. /
4777	#define OMP_FOR_GIMPLIFYING_P(NODE) \
4778	(TREE_LANG_FLAG_0 (OMP_LOOP_CHECK (NODE)))
4779
4780	/ A language-specific token attached to the OpenMP data clauses to*
4781	hold code (or code fragments) related to ctors, dtors, and op=.
4782	See semantics.c for details. /*
4783	#define CP_OMP_CLAUSE_INFO(NODE) \
4784	TREE_TYPE (OMP_CLAUSE_RANGE_CHECK (NODE, OMP_CLAUSE_PRIVATE, \
4785	OMP_CLAUSE_LINEAR))
4786
4787	/ Nonzero if this transaction expression's body contains statements. /
4788	#define TRANSACTION_EXPR_IS_STMT(NODE) \
4789	TREE_LANG_FLAG_0 (TRANSACTION_EXPR_CHECK (NODE))
4790
4791	/ These macros provide convenient access to the various _STMT nodes*
4792	created when parsing template declarations. /*
4793	#define TRY_STMTS(NODE) TREE_OPERAND (TRY_BLOCK_CHECK (NODE), 0)
4794	#define TRY_HANDLERS(NODE) TREE_OPERAND (TRY_BLOCK_CHECK (NODE), 1)
4795
4796	#define EH_SPEC_STMTS(NODE) TREE_OPERAND (EH_SPEC_BLOCK_CHECK (NODE), 0)
4797	#define EH_SPEC_RAISES(NODE) TREE_OPERAND (EH_SPEC_BLOCK_CHECK (NODE), 1)
4798
4799	#define USING_STMT_NAMESPACE(NODE) TREE_OPERAND (USING_STMT_CHECK (NODE), 0)
4800
4801	/ Nonzero if this try block is a function try block. /
4802	#define FN_TRY_BLOCK_P(NODE) TREE_LANG_FLAG_3 (TRY_BLOCK_CHECK (NODE))
4803	#define HANDLER_PARMS(NODE) TREE_OPERAND (HANDLER_CHECK (NODE), 0)
4804	#define HANDLER_BODY(NODE) TREE_OPERAND (HANDLER_CHECK (NODE), 1)
4805	#define HANDLER_TYPE(NODE) TREE_TYPE (HANDLER_CHECK (NODE))
4806
4807	/ CLEANUP_STMT accessors. The statement(s) covered, the cleanup to run*
4808	and the VAR_DECL for which this cleanup exists. /*
4809	#define CLEANUP_BODY(NODE) TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 0)
4810	#define CLEANUP_EXPR(NODE) TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 1)
4811	#define CLEANUP_DECL(NODE) TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 2)
4812
4813	/ IF_STMT accessors. These give access to the condition of the if*
4814	statement, the then block of the if statement, and the else block
4815	of the if statement if it exists. /*
4816	#define IF_COND(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 0)
4817	#define THEN_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 1)
4818	#define ELSE_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 2)
4819	#define IF_SCOPE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 3)
4820	#define IF_STMT_CONSTEXPR_P(NODE) TREE_LANG_FLAG_0 (IF_STMT_CHECK (NODE))
4821
4822	/ WHILE_STMT accessors. These give access to the condition of the*
4823	while statement and the body of the while statement, respectively. /*
4824	#define WHILE_COND(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
4825	#define WHILE_BODY(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
4826
4827	/ DO_STMT accessors. These give access to the condition of the do*
4828	statement and the body of the do statement, respectively. /*
4829	#define DO_COND(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
4830	#define DO_BODY(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
4831
4832	/ FOR_STMT accessors. These give access to the init statement,*
4833	condition, update expression, and body of the for statement,
4834	respectively. /*
4835	#define FOR_INIT_STMT(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
4836	#define FOR_COND(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
4837	#define FOR_EXPR(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
4838	#define FOR_BODY(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
4839	#define FOR_SCOPE(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 4)
4840
4841	/ RANGE_FOR_STMT accessors. These give access to the declarator,*
4842	expression, body, and scope of the statement, respectively. /*
4843	#define RANGE_FOR_DECL(NODE) TREE_OPERAND (RANGE_FOR_STMT_CHECK (NODE), 0)
4844	#define RANGE_FOR_EXPR(NODE) TREE_OPERAND (RANGE_FOR_STMT_CHECK (NODE), 1)
4845	#define RANGE_FOR_BODY(NODE) TREE_OPERAND (RANGE_FOR_STMT_CHECK (NODE), 2)
4846	#define RANGE_FOR_SCOPE(NODE) TREE_OPERAND (RANGE_FOR_STMT_CHECK (NODE), 3)
4847	#define RANGE_FOR_IVDEP(NODE) TREE_LANG_FLAG_6 (RANGE_FOR_STMT_CHECK (NODE))
4848
4849	#define SWITCH_STMT_COND(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 0)
4850	#define SWITCH_STMT_BODY(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 1)
4851	#define SWITCH_STMT_TYPE(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
4852	#define SWITCH_STMT_SCOPE(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 3)
4853	/ True if there are case labels for all possible values of switch cond, either*
4854	because there is a default: case label or because the case label ranges cover
4855	all values. /*
4856	#define SWITCH_STMT_ALL_CASES_P(NODE) \
4857	TREE_LANG_FLAG_0 (SWITCH_STMT_CHECK (NODE))
4858	/ True if the body of a switch stmt contains no BREAK_STMTs. /
4859	#define SWITCH_STMT_NO_BREAK_P(NODE) \
4860	TREE_LANG_FLAG_2 (SWITCH_STMT_CHECK (NODE))
4861
4862	/ STMT_EXPR accessor. /
4863	#define STMT_EXPR_STMT(NODE) TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
4864
4865	/ EXPR_STMT accessor. This gives the expression associated with an*
4866	expression statement. /*
4867	#define EXPR_STMT_EXPR(NODE) TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
4868
4869	/ True if this TARGET_EXPR was created by build_cplus_new, and so we can*
4870	discard it if it isn't useful. /*
4871	#define TARGET_EXPR_IMPLICIT_P(NODE) \
4872	TREE_LANG_FLAG_0 (TARGET_EXPR_CHECK (NODE))
4873
4874	/ True if this TARGET_EXPR is the result of list-initialization of a*
4875	temporary. /*
4876	#define TARGET_EXPR_LIST_INIT_P(NODE) \
4877	TREE_LANG_FLAG_1 (TARGET_EXPR_CHECK (NODE))
4878
4879	/ True if this TARGET_EXPR expresses direct-initialization of an object*
4880	to be named later. /*
4881	#define TARGET_EXPR_DIRECT_INIT_P(NODE) \
4882	TREE_LANG_FLAG_2 (TARGET_EXPR_CHECK (NODE))
4883
4884	/ True if NODE is a TARGET_EXPR that just expresses a copy of its INITIAL; if*
4885	the initializer has void type, it's doing something more complicated. /*
4886	#define SIMPLE_TARGET_EXPR_P(NODE) \
4887	(TREE_CODE (NODE) == TARGET_EXPR \
4888	&& !VOID_TYPE_P (TREE_TYPE (TARGET_EXPR_INITIAL (NODE))))
4889
4890	/ True if EXPR expresses direct-initialization of a TYPE. /
4891	#define DIRECT_INIT_EXPR_P(TYPE,EXPR) \
4892	(TREE_CODE (EXPR) == TARGET_EXPR && TREE_LANG_FLAG_2 (EXPR) \
4893	&& same_type_ignoring_top_level_qualifiers_p (TYPE, TREE_TYPE (EXPR)))
4894
4895	/ True if this CONVERT_EXPR is for a conversion to virtual base in*
4896	an NSDMI, and should be re-evaluated when used in a constructor. /*
4897	#define CONVERT_EXPR_VBASE_PATH(NODE) \
4898	TREE_LANG_FLAG_0 (CONVERT_EXPR_CHECK (NODE))
4899
4900	/ True if SIZEOF_EXPR argument is type. /
4901	#define SIZEOF_EXPR_TYPE_P(NODE) \
4902	TREE_LANG_FLAG_0 (SIZEOF_EXPR_CHECK (NODE))
4903
4904	/ An enumeration of the kind of tags that C++ accepts. /
4905	enum tag_types {
4906	none_type = `0`, / Not a tag type. /
4907	record_type, / "struct" types. /
4908	class_type, / "class" types. /
4909	union_type, / "union" types. /
4910	enum_type, / "enum" types. /
4911	typename_type, / "typename" types. /
4912	scope_type / namespace or tagged type name followed by :: /
4913	};
4914
4915	/ The various kinds of lvalues we distinguish. /
4916	enum cp_lvalue_kind_flags {
4917	clk_none = `0`, / Things that are not an lvalue. /
4918	clk_ordinary = `1`, / An ordinary lvalue. /
4919	clk_rvalueref = `2`,/ An xvalue (rvalue formed using an rvalue reference) /
4920	clk_class = `4`, / A prvalue of class or array type. /
4921	clk_bitfield = `8`, / An lvalue for a bit-field. /
4922	clk_packed = `16` / An lvalue for a packed field. /
4923	};
4924
4925	/ This type is used for parameters and variables which hold*
4926	combinations of the flags in enum cp_lvalue_kind_flags. /*
4927	typedef int cp_lvalue_kind;
4928
4929	/ Various kinds of template specialization, instantiation, etc. /
4930	enum tmpl_spec_kind {
4931	tsk_none, / Not a template at all. /
4932	tsk_invalid_member_spec, / An explicit member template*
4933	specialization, but the enclosing
4934	classes have not all been explicitly
4935	specialized. /*
4936	tsk_invalid_expl_inst, / An explicit instantiation containing*
4937	template parameter lists. /*
4938	tsk_excessive_parms, / A template declaration with too many*
4939	template parameter lists. /*
4940	tsk_insufficient_parms, / A template declaration with too few*
4941	parameter lists. /*
4942	tsk_template, / A template declaration. /
4943	tsk_expl_spec, / An explicit specialization. /
4944	tsk_expl_inst / An explicit instantiation. /
4945	};
4946
4947	/ The various kinds of access. BINFO_ACCESS depends on these being*
4948	two bit quantities. The numerical values are important; they are
4949	used to initialize RTTI data structures, so changing them changes
4950	the ABI. /*
4951	enum access_kind {
4952	ak_none = `0`, / Inaccessible. /
4953	ak_public = `1`, / Accessible, as a `public' thing. /
4954	ak_protected = `2`, / Accessible, as a `protected' thing. /
4955	ak_private = `3` / Accessible, as a `private' thing. /
4956	};
4957
4958	/ The various kinds of special functions. If you add to this list,*
4959	you should update special_function_p as well. /*
4960	enum special_function_kind {
4961	sfk_none = `0`, / Not a special function. This enumeral*
4962	must have value zero; see
4963	special_function_p. /*
4964	sfk_constructor, / A constructor. /
4965	sfk_copy_constructor, / A copy constructor. /
4966	sfk_move_constructor, / A move constructor. /
4967	sfk_copy_assignment, / A copy assignment operator. /
4968	sfk_move_assignment, / A move assignment operator. /
4969	sfk_destructor, / A destructor. /
4970	sfk_complete_destructor, / A destructor for complete objects. /
4971	sfk_base_destructor, / A destructor for base subobjects. /
4972	sfk_deleting_destructor, / A destructor for complete objects that*
4973	deletes the object after it has been
4974	destroyed. /*
4975	sfk_conversion, / A conversion operator. /
4976	sfk_deduction_guide, / A class template deduction guide. /
4977	sfk_inheriting_constructor / An inheriting constructor /
4978	};
4979
4980	/ The various kinds of linkage. From [basic.link],*
4981
4982	A name is said to have linkage when it might denote the same
4983	object, reference, function, type, template, namespace or value
4984	as a name introduced in another scope:
4985
4986	-- When a name has external linkage, the entity it denotes can
4987	be referred to from scopes of other translation units or from
4988	other scopes of the same translation unit.
4989
4990	-- When a name has internal linkage, the entity it denotes can
4991	be referred to by names from other scopes in the same
4992	translation unit.
4993
4994	-- When a name has no linkage, the entity it denotes cannot be
4995	referred to by names from other scopes. /*
4996
4997	enum linkage_kind {
4998	lk_none, / No linkage. /
4999	lk_internal, / Internal linkage. /
5000	lk_external / External linkage. /
5001	};
5002
5003	enum duration_kind {
5004	dk_static,
5005	dk_thread,
5006	dk_auto,
5007	dk_dynamic
5008	};
5009
5010	/ Bitmask flags to control type substitution. /
5011	enum tsubst_flags {
5012	tf_none = `0`, / nothing special /
5013	tf_error = `1` << `0`, / give error messages /
5014	tf_warning = `1` << `1`, / give warnings too /
5015	tf_ignore_bad_quals = `1` << `2`, / ignore bad cvr qualifiers /
5016	tf_keep_type_decl = `1` << `3`, / retain typedef type decls*
5017	(make_typename_type use) /*
5018	tf_ptrmem_ok = `1` << `4`, / pointers to member ok (internal*
5019	instantiate_type use) /*
5020	tf_user = `1` << `5`, / found template must be a user template*
5021	(lookup_template_class use) /*
5022	tf_conv = `1` << `6`, / We are determining what kind of*
5023	conversion might be permissible,
5024	not actually performing the
5025	conversion. /*
5026	tf_decltype = `1` << `7`, / We are the operand of decltype.*
5027	Used to implement the special rules
5028	for calls in decltype (5.2.2/11). /*
5029	tf_partial = `1` << `8`, / Doing initial explicit argument*
5030	substitution in fn_type_unification. /*
5031	tf_fndecl_type = `1` << `9`, / Substituting the type of a function*
5032	declaration. /*
5033	tf_no_cleanup = `1` << `10`, / Do not build a cleanup*
5034	(build_target_expr and friends) /*
5035	/ Convenient substitution flags combinations. /
5036	tf_warning_or_error = tf_warning \| tf_error
5037	};
5038
5039	/ This type is used for parameters and variables which hold*
5040	combinations of the flags in enum tsubst_flags. /*
5041	typedef int tsubst_flags_t;
5042
5043	/ The kind of checking we can do looking in a class hierarchy. /
5044	enum base_access_flags {
5045	ba_any = `0`, / Do not check access, allow an ambiguous base,*
5046	prefer a non-virtual base /*
5047	ba_unique = `1` << `0`, / Must be a unique base. /
5048	ba_check_bit = `1` << `1`, / Check access. /
5049	ba_check = ba_unique \| ba_check_bit,
5050	ba_ignore_scope = `1` << `2` / Ignore access allowed by local scope. /
5051	};
5052
5053	/ This type is used for parameters and variables which hold*
5054	combinations of the flags in enum base_access_flags. /*
5055	typedef int base_access;
5056
5057	/ The various kinds of access check during parsing. /
5058	enum deferring_kind {
5059	dk_no_deferred = `0`, / Check access immediately /
5060	dk_deferred = `1`, / Deferred check /
5061	dk_no_check = `2` / No access check /
5062	};
5063
5064	/ The kind of base we can find, looking in a class hierarchy.*
5065	Values <0 indicate we failed. /*
5066	enum base_kind {
5067	bk_inaccessible = -`3`, / The base is inaccessible /
5068	bk_ambig = -`2`, / The base is ambiguous /
5069	bk_not_base = -`1`, / It is not a base /
5070	bk_same_type = `0`, / It is the same type /
5071	bk_proper_base = `1`, / It is a proper base /
5072	bk_via_virtual = `2` / It is a proper base, but via a virtual*
5073	path. This might not be the canonical
5074	binfo. /*
5075	};
5076
5077	/ Node for "pointer to (virtual) function".*
5078	This may be distinct from ptr_type_node so gdb can distinguish them. /*
5079	#define vfunc_ptr_type_node vtable_entry_type
5080
5081
5082	/ For building calls to `delete'. /
5083	extern GTY(()) tree integer_two_node;
5084
5085	/ The number of function bodies which we are currently processing.*
5086	(Zero if we are at namespace scope, one inside the body of a
5087	function, two inside the body of a function in a local class, etc.) /*
5088	extern int function_depth;
5089
5090	/ Nonzero if we are inside eq_specializations, which affects comparison of*
5091	PARM_DECLs in cp_tree_equal. /*
5092	extern int comparing_specializations;
5093
5094	/ In parser.c. /
5095
5096	/ Nonzero if we are parsing an unevaluated operand: an operand to*
5097	sizeof, typeof, or alignof. This is a count since operands to
5098	sizeof can be nested. /*
5099
5100	extern int cp_unevaluated_operand;
5101
5102	/ RAII class used to inhibit the evaluation of operands during parsing*
5103	and template instantiation. Evaluation warnings are also inhibited. /*
5104
5105	struct cp_unevaluated
5106	{
5107	cp_unevaluated ();
5108	~cp_unevaluated ();
5109	};
5110
5111	/ in pt.c /
5112
5113	/ These values are used for the `STRICT' parameter to type_unification and*
5114	fn_type_unification. Their meanings are described with the
5115	documentation for fn_type_unification. /*
5116
5117	enum unification_kind_t {
5118	DEDUCE_CALL,
5119	DEDUCE_CONV,
5120	DEDUCE_EXACT
5121	};
5122
5123	// An RAII class used to create a new pointer map for local
5124	// specializations. When the stack goes out of scope, the
5125	// previous pointer map is restored.
5126	enum lss_policy { lss_blank, lss_copy };
5127	struct local_specialization_stack
5128	{
5129	local_specialization_stack (lss_policy = lss_blank);
5130	~local_specialization_stack ();
5131
5132	hash_map<tree, tree> *saved;
5133	};
5134
5135	/ in class.c /
5136
5137	extern int current_class_depth;
5138
5139	/ An array of all local classes present in this translation unit, in*
5140	declaration order. /*
5141	extern GTY(()) vec<tree, va_gc> *local_classes;
5142
5143	/ in decl.c /
5144
5145	/ An array of static vars & fns. /
5146	extern GTY(()) vec<tree, va_gc> *static_decls;
5147
5148	/ An array of vtable-needing types that have no key function, or have*
5149	an emitted key function. /*
5150	extern GTY(()) vec<tree, va_gc> *keyed_classes;
5151
5152	/ Here's where we control how name mangling takes place. /
5153
5154	/ Cannot use '$' up front, because this confuses gdb*
5155	(names beginning with '$' are gdb-local identifiers).
5156
5157	Note that all forms in which the '$' is significant are long enough
5158	for direct indexing (meaning that if we know there is a '$'
5159	at a particular location, we can index into the string at
5160	any other location that provides distinguishing characters). /*
5161
5162	/ Define NO_DOT_IN_LABEL in your favorite tm file if your assembler*
5163	doesn't allow '.' in symbol names. /*
5164	#ifndef NO_DOT_IN_LABEL
5165
5166	#define JOINER '.'
5167
5168	#define AUTO_TEMP_NAME "_.tmp_"
5169	#define VFIELD_BASE ".vf"
5170	#define VFIELD_NAME "_vptr."
5171	#define VFIELD_NAME_FORMAT "_vptr.%s"
5172
5173	#else /* NO_DOT_IN_LABEL */
5174
5175	#ifndef NO_DOLLAR_IN_LABEL
5176
5177	#define JOINER '$'
5178
5179	#define AUTO_TEMP_NAME "_$tmp_"
5180	#define VFIELD_BASE "$vf"
5181	#define VFIELD_NAME "_vptr$"
5182	#define VFIELD_NAME_FORMAT "_vptr$%s"
5183
5184	#else /* NO_DOLLAR_IN_LABEL */
5185
5186	#define AUTO_TEMP_NAME "__tmp_"
5187	#define TEMP_NAME_P(ID_NODE) \
5188	(!strncmp (IDENTIFIER_POINTER (ID_NODE), AUTO_TEMP_NAME, \
5189	sizeof (AUTO_TEMP_NAME) - 1))
5190	#define VTABLE_NAME "__vt_"
5191	#define VTABLE_NAME_P(ID_NODE) \
5192	(!strncmp (IDENTIFIER_POINTER (ID_NODE), VTABLE_NAME, \
5193	sizeof (VTABLE_NAME) - 1))
5194	#define VFIELD_BASE "__vfb"
5195	#define VFIELD_NAME "__vptr_"
5196	#define VFIELD_NAME_P(ID_NODE) \
5197	(!strncmp (IDENTIFIER_POINTER (ID_NODE), VFIELD_NAME, \
5198	sizeof (VFIELD_NAME) - 1))
5199	#define VFIELD_NAME_FORMAT "__vptr_%s"
5200
5201	#endif /* NO_DOLLAR_IN_LABEL */
5202	#endif /* NO_DOT_IN_LABEL */
5203
5204	#define LAMBDANAME_PREFIX "__lambda"
5205	#define LAMBDANAME_FORMAT LAMBDANAME_PREFIX "%d"
5206
5207	#define UDLIT_OP_ANSI_PREFIX "operator\"\""
5208	#define UDLIT_OP_ANSI_FORMAT UDLIT_OP_ANSI_PREFIX "%s"
5209	#define UDLIT_OP_MANGLED_PREFIX "li"
5210	#define UDLIT_OP_MANGLED_FORMAT UDLIT_OP_MANGLED_PREFIX "%s"
5211	#define UDLIT_OPER_P(ID_NODE) \
5212	(!strncmp (IDENTIFIER_POINTER (ID_NODE), \
5213	UDLIT_OP_ANSI_PREFIX, \
5214	sizeof (UDLIT_OP_ANSI_PREFIX) - 1))
5215	#define UDLIT_OP_SUFFIX(ID_NODE) \
5216	(IDENTIFIER_POINTER (ID_NODE) + sizeof (UDLIT_OP_ANSI_PREFIX) - 1)
5217
5218	#if !defined(NO_DOLLAR_IN_LABEL) \|\| !defined(NO_DOT_IN_LABEL)
5219
5220	#define VTABLE_NAME_P(ID_NODE) (IDENTIFIER_POINTER (ID_NODE)[1] == 'v' \
5221	&& IDENTIFIER_POINTER (ID_NODE)[2] == 't' \
5222	&& IDENTIFIER_POINTER (ID_NODE)[3] == JOINER)
5223
5224	#define TEMP_NAME_P(ID_NODE) \
5225	(!strncmp (IDENTIFIER_POINTER (ID_NODE), AUTO_TEMP_NAME, sizeof (AUTO_TEMP_NAME)-1))
5226	#define VFIELD_NAME_P(ID_NODE) \
5227	(!strncmp (IDENTIFIER_POINTER (ID_NODE), VFIELD_NAME, sizeof(VFIELD_NAME)-1))
5228
5229	#endif /* !defined(NO_DOLLAR_IN_LABEL) \|\| !defined(NO_DOT_IN_LABEL) */
5230
5231
5232	/ Nonzero if we're done parsing and into end-of-file activities.*
5233	Two if we're done with front-end processing. /*
5234
5235	extern int at_eof;
5236
5237	/ True if note_mangling_alias should enqueue mangling aliases for*
5238	later generation, rather than emitting them right away. /*
5239
5240	extern bool defer_mangling_aliases;
5241
5242	/ True if noexcept is part of the type (i.e. in C++17). /
5243
5244	extern bool flag_noexcept_type;
5245
5246	/ A list of namespace-scope objects which have constructors or*
5247	destructors which reside in the global scope. The decl is stored
5248	in the TREE_VALUE slot and the initializer is stored in the
5249	TREE_PURPOSE slot. /*
5250	extern GTY(()) tree static_aggregates;
5251	/ Likewise, for thread local storage. /
5252	extern GTY(()) tree tls_aggregates;
5253
5254	enum overload_flags { NO_SPECIAL = `0`, DTOR_FLAG, TYPENAME_FLAG };
5255
5256	/ These are uses as bits in flags passed to various functions to*
5257	control their behavior. Despite the LOOKUP_ prefix, many of these
5258	do not control name lookup. ??? Functions using these flags should
5259	probably be modified to accept explicit boolean flags for the
5260	behaviors relevant to them. /*
5261	/ Check for access violations. /
5262	#define LOOKUP_PROTECT (1 << 0)
5263	#define LOOKUP_NORMAL (LOOKUP_PROTECT)
5264	/ Even if the function found by lookup is a virtual function, it*
5265	should be called directly. /*
5266	#define LOOKUP_NONVIRTUAL (1 << 1)
5267	/ Non-converting (i.e., "explicit") constructors are not tried. This flag*
5268	indicates that we are not performing direct-initialization. /*
5269	#define LOOKUP_ONLYCONVERTING (1 << 2)
5270	#define LOOKUP_IMPLICIT (LOOKUP_NORMAL \| LOOKUP_ONLYCONVERTING)
5271	/ If a temporary is created, it should be created so that it lives*
5272	as long as the current variable bindings; otherwise it only lives
5273	until the end of the complete-expression. It also forces
5274	direct-initialization in cases where other parts of the compiler
5275	have already generated a temporary, such as reference
5276	initialization and the catch parameter. /*
5277	#define DIRECT_BIND (1 << 3)
5278	/ We're performing a user-defined conversion, so more user-defined*
5279	conversions are not permitted (only built-in conversions). /*
5280	#define LOOKUP_NO_CONVERSION (1 << 4)
5281	/ The user has explicitly called a destructor. (Therefore, we do*
5282	not need to check that the object is non-NULL before calling the
5283	destructor.) /*
5284	#define LOOKUP_DESTRUCTOR (1 << 5)
5285	/ Do not permit references to bind to temporaries. /
5286	#define LOOKUP_NO_TEMP_BIND (1 << 6)
5287	/ Do not accept objects, and possibly namespaces. /
5288	#define LOOKUP_PREFER_TYPES (1 << 7)
5289	/ Do not accept objects, and possibly types. /
5290	#define LOOKUP_PREFER_NAMESPACES (1 << 8)
5291	/ Accept types or namespaces. /
5292	#define LOOKUP_PREFER_BOTH (LOOKUP_PREFER_TYPES \| LOOKUP_PREFER_NAMESPACES)
5293	/ Return friend declarations and un-declared builtin functions.*
5294	(Normally, these entities are registered in the symbol table, but
5295	not found by lookup.) /*
5296	#define LOOKUP_HIDDEN (LOOKUP_PREFER_NAMESPACES << 1)
5297	/ We're trying to treat an lvalue as an rvalue. /
5298	#define LOOKUP_PREFER_RVALUE (LOOKUP_HIDDEN << 1)
5299	/ We're inside an init-list, so narrowing conversions are ill-formed. /
5300	#define LOOKUP_NO_NARROWING (LOOKUP_PREFER_RVALUE << 1)
5301	/ We're looking up a constructor for list-initialization. /
5302	#define LOOKUP_LIST_INIT_CTOR (LOOKUP_NO_NARROWING << 1)
5303	/ This is the first parameter of a copy constructor. /
5304	#define LOOKUP_COPY_PARM (LOOKUP_LIST_INIT_CTOR << 1)
5305	/ We only want to consider list constructors. /
5306	#define LOOKUP_LIST_ONLY (LOOKUP_COPY_PARM << 1)
5307	/ Return after determining which function to call and checking access.*
5308	Used by sythesized_method_walk to determine which functions will
5309	be called to initialize subobjects, in order to determine exception
5310	specification and possible implicit delete.
5311	This is kind of a hack, but exiting early avoids problems with trying
5312	to perform argument conversions when the class isn't complete yet. /*
5313	#define LOOKUP_SPECULATIVE (LOOKUP_LIST_ONLY << 1)
5314	/ Used by calls from defaulted functions to limit the overload set to avoid*
5315	cycles trying to declare them (core issue 1092). /*
5316	#define LOOKUP_DEFAULTED (LOOKUP_SPECULATIVE << 1)
5317	/ Used in calls to store_init_value to suppress its usual call to*
5318	digest_init. /*
5319	#define LOOKUP_ALREADY_DIGESTED (LOOKUP_DEFAULTED << 1)
5320	/ An instantiation with explicit template arguments. /
5321	#define LOOKUP_EXPLICIT_TMPL_ARGS (LOOKUP_ALREADY_DIGESTED << 1)
5322	/ Like LOOKUP_NO_TEMP_BIND, but also prevent binding to xvalues. /
5323	#define LOOKUP_NO_RVAL_BIND (LOOKUP_EXPLICIT_TMPL_ARGS << 1)
5324	/ Used by case_conversion to disregard non-integral conversions. /
5325	#define LOOKUP_NO_NON_INTEGRAL (LOOKUP_NO_RVAL_BIND << 1)
5326	/ Used for delegating constructors in order to diagnose self-delegation. /
5327	#define LOOKUP_DELEGATING_CONS (LOOKUP_NO_NON_INTEGRAL << 1)
5328
5329	#define LOOKUP_NAMESPACES_ONLY(F) \
5330	(((F) & LOOKUP_PREFER_NAMESPACES) && !((F) & LOOKUP_PREFER_TYPES))
5331	#define LOOKUP_TYPES_ONLY(F) \
5332	(!((F) & LOOKUP_PREFER_NAMESPACES) && ((F) & LOOKUP_PREFER_TYPES))
5333	#define LOOKUP_QUALIFIERS_ONLY(F) ((F) & LOOKUP_PREFER_BOTH)
5334
5335
5336	/ These flags are used by the conversion code.*
5337	CONV_IMPLICIT : Perform implicit conversions (standard and user-defined).
5338	CONV_STATIC : Perform the explicit conversions for static_cast.
5339	CONV_CONST : Perform the explicit conversions for const_cast.
5340	CONV_REINTERPRET: Perform the explicit conversions for reinterpret_cast.
5341	CONV_PRIVATE : Perform upcasts to private bases.
5342	CONV_FORCE_TEMP : Require a new temporary when converting to the same
5343	aggregate type. /*
5344
5345	#define CONV_IMPLICIT 1
5346	#define CONV_STATIC 2
5347	#define CONV_CONST 4
5348	#define CONV_REINTERPRET 8
5349	#define CONV_PRIVATE 16
5350	/ #define CONV_NONCONVERTING 32 /
5351	#define CONV_FORCE_TEMP 64
5352	#define CONV_FOLD 128
5353	#define CONV_OLD_CONVERT (CONV_IMPLICIT \| CONV_STATIC \| CONV_CONST \
5354	\| CONV_REINTERPRET)
5355	#define CONV_C_CAST (CONV_IMPLICIT \| CONV_STATIC \| CONV_CONST \
5356	\| CONV_REINTERPRET \| CONV_PRIVATE \| CONV_FORCE_TEMP)
5357	#define CONV_BACKEND_CONVERT (CONV_OLD_CONVERT \| CONV_FOLD)
5358
5359	/ Used by build_expr_type_conversion to indicate which types are*
5360	acceptable as arguments to the expression under consideration. /*
5361
5362	#define WANT_INT 1 /* integer types, including bool */
5363	#define WANT_FLOAT 2 /* floating point types */
5364	#define WANT_ENUM 4 /* enumerated types */
5365	#define WANT_POINTER 8 /* pointer types */
5366	#define WANT_NULL 16 /* null pointer constant */
5367	#define WANT_VECTOR_OR_COMPLEX 32 /* vector or complex types */
5368	#define WANT_ARITH (WANT_INT \| WANT_FLOAT \| WANT_VECTOR_OR_COMPLEX)
5369
5370	/ Used with comptypes, and related functions, to guide type*
5371	comparison. /*
5372
5373	#define COMPARE_STRICT 0 /* Just check if the types are the
5374	same. */
5375	#define COMPARE_BASE 1 /* Check to see if the second type is
5376	derived from the first. */
5377	#define COMPARE_DERIVED 2 /* Like COMPARE_BASE, but in
5378	reverse. */
5379	#define COMPARE_REDECLARATION 4 /* The comparison is being done when
5380	another declaration of an existing
5381	entity is seen. */
5382	#define COMPARE_STRUCTURAL 8 /* The comparison is intended to be
5383	structural. The actual comparison
5384	will be identical to
5385	COMPARE_STRICT. */
5386
5387	/ Used with start function. /
5388	#define SF_DEFAULT 0 /* No flags. */
5389	#define SF_PRE_PARSED 1 /* The function declaration has
5390	already been parsed. */
5391	#define SF_INCLASS_INLINE 2 /* The function is an inline, defined
5392	in the class body. */
5393
5394	/ Used with start_decl's initialized parameter. /
5395	#define SD_UNINITIALIZED 0
5396	#define SD_INITIALIZED 1
5397	#define SD_DEFAULTED 2
5398	#define SD_DELETED 3
5399
5400	/ Returns nonzero iff TYPE1 and TYPE2 are the same type, or if TYPE2*
5401	is derived from TYPE1, or if TYPE2 is a pointer (reference) to a
5402	class derived from the type pointed to (referred to) by TYPE1. /*
5403	#define same_or_base_type_p(TYPE1, TYPE2) \
5404	comptypes ((TYPE1), (TYPE2), COMPARE_BASE)
5405
5406	/ These macros are used to access a TEMPLATE_PARM_INDEX. /
5407	#define TEMPLATE_PARM_INDEX_CAST(NODE) \
5408	((template_parm_index*)TEMPLATE_PARM_INDEX_CHECK (NODE))
5409	#define TEMPLATE_PARM_IDX(NODE) (TEMPLATE_PARM_INDEX_CAST (NODE)->index)
5410	#define TEMPLATE_PARM_LEVEL(NODE) (TEMPLATE_PARM_INDEX_CAST (NODE)->level)
5411	#define TEMPLATE_PARM_DESCENDANTS(NODE) (TREE_CHAIN (NODE))
5412	#define TEMPLATE_PARM_ORIG_LEVEL(NODE) (TEMPLATE_PARM_INDEX_CAST (NODE)->orig_level)
5413	#define TEMPLATE_PARM_DECL(NODE) (TEMPLATE_PARM_INDEX_CAST (NODE)->decl)
5414	#define TEMPLATE_PARM_PARAMETER_PACK(NODE) \
5415	(TREE_LANG_FLAG_0 (TEMPLATE_PARM_INDEX_CHECK (NODE)))
5416
5417	/ These macros are for accessing the fields of TEMPLATE_TYPE_PARM,*
5418	TEMPLATE_TEMPLATE_PARM and BOUND_TEMPLATE_TEMPLATE_PARM nodes. /*
5419	#define TEMPLATE_TYPE_PARM_INDEX(NODE) \
5420	(TYPE_VALUES_RAW (TREE_CHECK3 ((NODE), TEMPLATE_TYPE_PARM, \
5421	TEMPLATE_TEMPLATE_PARM, \
5422	BOUND_TEMPLATE_TEMPLATE_PARM)))
5423	#define TEMPLATE_TYPE_IDX(NODE) \
5424	(TEMPLATE_PARM_IDX (TEMPLATE_TYPE_PARM_INDEX (NODE)))
5425	#define TEMPLATE_TYPE_LEVEL(NODE) \
5426	(TEMPLATE_PARM_LEVEL (TEMPLATE_TYPE_PARM_INDEX (NODE)))
5427	#define TEMPLATE_TYPE_ORIG_LEVEL(NODE) \
5428	(TEMPLATE_PARM_ORIG_LEVEL (TEMPLATE_TYPE_PARM_INDEX (NODE)))
5429	#define TEMPLATE_TYPE_DECL(NODE) \
5430	(TEMPLATE_PARM_DECL (TEMPLATE_TYPE_PARM_INDEX (NODE)))
5431	#define TEMPLATE_TYPE_PARAMETER_PACK(NODE) \
5432	(TEMPLATE_PARM_PARAMETER_PACK (TEMPLATE_TYPE_PARM_INDEX (NODE)))
5433
5434	/ For a C++17 class deduction placeholder, the template it represents. /
5435	#define CLASS_PLACEHOLDER_TEMPLATE(NODE) \
5436	(DECL_INITIAL (TYPE_NAME (TEMPLATE_TYPE_PARM_CHECK (NODE))))
5437
5438	/ Contexts in which auto deduction occurs. These flags are*
5439	used to control diagnostics in do_auto_deduction. /*
5440
5441	enum auto_deduction_context
5442	{
5443	adc_unspecified, / Not given /
5444	adc_variable_type, / Variable initializer deduction /
5445	adc_return_type, / Return type deduction /
5446	adc_unify, / Template argument deduction /
5447	adc_requirement, / Argument deduction constraint /
5448	adc_decomp_type / Decomposition declaration initializer deduction /
5449	};
5450
5451	/ True if this type-parameter belongs to a class template, used by C++17*
5452	class template argument deduction. /*
5453	#define TEMPLATE_TYPE_PARM_FOR_CLASS(NODE) \
5454	(TREE_LANG_FLAG_0 (TEMPLATE_TYPE_PARM_CHECK (NODE)))
5455
5456	/ True iff this TEMPLATE_TYPE_PARM represents decltype(auto). /
5457	#define AUTO_IS_DECLTYPE(NODE) \
5458	(TYPE_LANG_FLAG_5 (TEMPLATE_TYPE_PARM_CHECK (NODE)))
5459
5460	/ These constants can used as bit flags in the process of tree formatting.*
5461
5462	TFF_PLAIN_IDENTIFIER: unqualified part of a name.
5463	TFF_SCOPE: include the class and namespace scope of the name.
5464	TFF_CHASE_TYPEDEF: print the original type-id instead of the typedef-name.
5465	TFF_DECL_SPECIFIERS: print decl-specifiers.
5466	TFF_CLASS_KEY_OR_ENUM: precede a class-type name (resp. enum name) with
5467	a class-key (resp. `enum').
5468	TFF_RETURN_TYPE: include function return type.
5469	TFF_FUNCTION_DEFAULT_ARGUMENTS: include function default parameter values.
5470	TFF_EXCEPTION_SPECIFICATION: show function exception specification.
5471	TFF_TEMPLATE_HEADER: show the template<...> header in a
5472	template-declaration.
5473	TFF_TEMPLATE_NAME: show only template-name.
5474	TFF_EXPR_IN_PARENS: parenthesize expressions.
5475	TFF_NO_FUNCTION_ARGUMENTS: don't show function arguments.
5476	TFF_UNQUALIFIED_NAME: do not print the qualifying scope of the
5477	top-level entity.
5478	TFF_NO_OMIT_DEFAULT_TEMPLATE_ARGUMENTS: do not omit template arguments
5479	identical to their defaults.
5480	TFF_NO_TEMPLATE_BINDINGS: do not print information about the template
5481	arguments for a function template specialization.
5482	TFF_POINTER: we are printing a pointer type. /*
5483
5484	#define TFF_PLAIN_IDENTIFIER (0)
5485	#define TFF_SCOPE (1)
5486	#define TFF_CHASE_TYPEDEF (1 << 1)
5487	#define TFF_DECL_SPECIFIERS (1 << 2)
5488	#define TFF_CLASS_KEY_OR_ENUM (1 << 3)
5489	#define TFF_RETURN_TYPE (1 << 4)
5490	#define TFF_FUNCTION_DEFAULT_ARGUMENTS (1 << 5)
5491	#define TFF_EXCEPTION_SPECIFICATION (1 << 6)
5492	#define TFF_TEMPLATE_HEADER (1 << 7)
5493	#define TFF_TEMPLATE_NAME (1 << 8)
5494	#define TFF_EXPR_IN_PARENS (1 << 9)
5495	#define TFF_NO_FUNCTION_ARGUMENTS (1 << 10)
5496	#define TFF_UNQUALIFIED_NAME (1 << 11)
5497	#define TFF_NO_OMIT_DEFAULT_TEMPLATE_ARGUMENTS (1 << 12)
5498	#define TFF_NO_TEMPLATE_BINDINGS (1 << 13)
5499	#define TFF_POINTER (1 << 14)
5500
5501	/ Returns the TEMPLATE_DECL associated to a TEMPLATE_TEMPLATE_PARM*
5502	node. /*
5503	#define TEMPLATE_TEMPLATE_PARM_TEMPLATE_DECL(NODE) \
5504	((TREE_CODE (NODE) == BOUND_TEMPLATE_TEMPLATE_PARM) \
5505	? TYPE_TI_TEMPLATE (NODE) \
5506	: TYPE_NAME (NODE))
5507
5508	/ in lex.c /
5509
5510	extern void init_reswords (void);
5511
5512	/ Various flags for the overloaded operator information. /
5513	enum ovl_op_flags
5514	{
5515	OVL_OP_FLAG_NONE = `0`, / Don't care. /
5516	OVL_OP_FLAG_UNARY = `1`, / Is unary. /
5517	OVL_OP_FLAG_BINARY = `2`, / Is binary. /
5518	OVL_OP_FLAG_AMBIARY = `3`, / May be unary or binary. /
5519	OVL_OP_FLAG_ALLOC = `4`, / operator new or delete. /
5520	OVL_OP_FLAG_DELETE = `1`, / operator delete. /
5521	OVL_OP_FLAG_VEC = `2` / vector new or delete. /
5522	};
5523
5524	/ Compressed operator codes. Order is determined by operators.def*
5525	and does not match that of tree_codes. /*
5526	enum ovl_op_code
5527	{
5528	OVL_OP_ERROR_MARK,
5529	OVL_OP_NOP_EXPR,
5530	#define DEF_OPERATOR(NAME, CODE, MANGLING, FLAGS) OVL_OP_##CODE,
5531	#define DEF_ASSN_OPERATOR(NAME, CODE, MANGLING) /* NOTHING */
5532	#include "operators.def"
5533	OVL_OP_MAX
5534	};
5535
5536	struct GTY(()) ovl_op_info_t {
5537	/ The IDENTIFIER_NODE for the operator. /
5538	tree identifier;
5539	/ The name of the operator. /
5540	const char *name;
5541	/ The mangled name of the operator. /
5542	const char *mangled_name;
5543	/ The (regular) tree code. /
5544	enum tree_code tree_code : `16`;
5545	/ The (compressed) operator code. /
5546	enum ovl_op_code ovl_op_code : `8`;
5547	/ The ovl_op_flags of the operator /
5548	unsigned flags : `8`;
5549	};
5550
5551	/ Overloaded operator info indexed by ass_op_p & ovl_op_code. /
5552	extern GTY(()) ovl_op_info_t ovl_op_info[`2`][OVL_OP_MAX];
5553	/ Mapping from tree_codes to ovl_op_codes. /
5554	extern GTY(()) unsigned char ovl_op_mapping[MAX_TREE_CODES];
5555	/ Mapping for ambi-ary operators from the binary to the unary. /
5556	extern GTY(()) unsigned char ovl_op_alternate[OVL_OP_MAX];
5557
5558	/ Given an ass_op_p boolean and a tree code, return a pointer to its*
5559	overloaded operator info. Tree codes for non-overloaded operators
5560	map to the error-operator. /*
5561	#define OVL_OP_INFO(IS_ASS_P, TREE_CODE) \
5562	(&ovl_op_info[(IS_ASS_P) != 0][ovl_op_mapping[(TREE_CODE)]])
5563	/ Overloaded operator info for an identifier for which*
5564	IDENTIFIER_OVL_OP_P is true. /*
5565	#define IDENTIFIER_OVL_OP_INFO(NODE) \
5566	(&ovl_op_info[IDENTIFIER_KIND_BIT_0 (NODE)][IDENTIFIER_CP_INDEX (NODE)])
5567	#define IDENTIFIER_OVL_OP_FLAGS(NODE) \
5568	(IDENTIFIER_OVL_OP_INFO (NODE)->flags)
5569
5570	/ A type-qualifier, or bitmask therefore, using the TYPE_QUAL*
5571	constants. /*
5572
5573	typedef int cp_cv_quals;
5574
5575	/ Non-static member functions have an optional virt-specifier-seq.*
5576	There is a VIRT_SPEC value for each virt-specifier.
5577	They can be combined by bitwise-or to form the complete set of
5578	virt-specifiers for a member function. /*
5579	enum virt_specifier
5580	{
5581	VIRT_SPEC_UNSPECIFIED = `0x0`,
5582	VIRT_SPEC_FINAL = `0x1`,
5583	VIRT_SPEC_OVERRIDE = `0x2`
5584	};
5585
5586	/ A type-qualifier, or bitmask therefore, using the VIRT_SPEC*
5587	constants. /*
5588
5589	typedef int cp_virt_specifiers;
5590
5591	/ Wherever there is a function-cv-qual, there could also be a ref-qualifier:*
5592
5593	[dcl.fct]
5594	The return type, the parameter-type-list, the ref-qualifier, and
5595	the cv-qualifier-seq, but not the default arguments or the exception
5596	specification, are part of the function type.
5597
5598	REF_QUAL_NONE Ordinary member function with no ref-qualifier
5599	REF_QUAL_LVALUE Member function with the &-ref-qualifier
5600	REF_QUAL_RVALUE Member function with the &&-ref-qualifier /*
5601
5602	enum cp_ref_qualifier {
5603	REF_QUAL_NONE = `0`,
5604	REF_QUAL_LVALUE = `1`,
5605	REF_QUAL_RVALUE = `2`
5606	};
5607
5608	/ A storage class. /
5609
5610	enum cp_storage_class {
5611	/ sc_none must be zero so that zeroing a cp_decl_specifier_seq*
5612	sets the storage_class field to sc_none. /*
5613	sc_none = `0`,
5614	sc_auto,
5615	sc_register,
5616	sc_static,
5617	sc_extern,
5618	sc_mutable
5619	};
5620
5621	/ An individual decl-specifier. This is used to index the array of*
5622	locations for the declspecs in struct cp_decl_specifier_seq
5623	below. /*
5624
5625	enum cp_decl_spec {
5626	ds_first,
5627	ds_signed = ds_first,
5628	ds_unsigned,
5629	ds_short,
5630	ds_long,
5631	ds_const,
5632	ds_volatile,
5633	ds_restrict,
5634	ds_inline,
5635	ds_virtual,
5636	ds_explicit,
5637	ds_friend,
5638	ds_typedef,
5639	ds_alias,
5640	ds_constexpr,
5641	ds_complex,
5642	ds_thread,
5643	ds_type_spec,
5644	ds_redefined_builtin_type_spec,
5645	ds_attribute,
5646	ds_std_attribute,
5647	ds_storage_class,
5648	ds_long_long,
5649	ds_concept,
5650	ds_last / This enumerator must always be the last one. /
5651	};
5652
5653	/ A decl-specifier-seq. /
5654
5655	struct cp_decl_specifier_seq {
5656	/ An array of locations for the declaration sepecifiers, indexed by*
5657	enum cp_decl_spec_word. /*
5658	source_location locations[ds_last];
5659	/ The primary type, if any, given by the decl-specifier-seq.*
5660	Modifiers, like "short", "const", and "unsigned" are not
5661	reflected here. This field will be a TYPE, unless a typedef-name
5662	was used, in which case it will be a TYPE_DECL. /*
5663	tree type;
5664	/ The attributes, if any, provided with the specifier sequence. /
5665	tree attributes;
5666	/ The c++11 attributes that follows the type specifier. /
5667	tree std_attributes;
5668	/ If non-NULL, a built-in type that the user attempted to redefine*
5669	to some other type. /*
5670	tree redefined_builtin_type;
5671	/ The storage class specified -- or sc_none if no storage class was*
5672	explicitly specified. /*
5673	cp_storage_class storage_class;
5674	/ For the __intN declspec, this stores the index into the int_n_* arrays. /
5675	int int_n_idx;
5676	/ True iff TYPE_SPEC defines a class or enum. /
5677	BOOL_BITFIELD type_definition_p : `1`;
5678	/ True iff multiple types were (erroneously) specified for this*
5679	decl-specifier-seq. /*
5680	BOOL_BITFIELD multiple_types_p : `1`;
5681	/ True iff multiple storage classes were (erroneously) specified*
5682	for this decl-specifier-seq or a combination of a storage class
5683	with a typedef specifier. /*
5684	BOOL_BITFIELD conflicting_specifiers_p : `1`;
5685	/ True iff at least one decl-specifier was found. /
5686	BOOL_BITFIELD any_specifiers_p : `1`;
5687	/ True iff at least one type-specifier was found. /
5688	BOOL_BITFIELD any_type_specifiers_p : `1`;
5689	/ True iff "int" was explicitly provided. /
5690	BOOL_BITFIELD explicit_int_p : `1`;
5691	/ True iff "__intN" was explicitly provided. /
5692	BOOL_BITFIELD explicit_intN_p : `1`;
5693	/ True iff "char" was explicitly provided. /
5694	BOOL_BITFIELD explicit_char_p : `1`;
5695	/ True iff ds_thread is set for __thread, not thread_local. /
5696	BOOL_BITFIELD gnu_thread_keyword_p : `1`;
5697	/ True iff the type is a decltype. /
5698	BOOL_BITFIELD decltype_p : `1`;
5699	};
5700
5701	/ The various kinds of declarators. /
5702
5703	enum cp_declarator_kind {
5704	cdk_id,
5705	cdk_function,
5706	cdk_array,
5707	cdk_pointer,
5708	cdk_reference,
5709	cdk_ptrmem,
5710	cdk_decomp,
5711	cdk_error
5712	};
5713
5714	/ A declarator. /
5715
5716	typedef struct cp_declarator cp_declarator;
5717
5718	typedef struct cp_parameter_declarator cp_parameter_declarator;
5719
5720	/ A parameter, before it has been semantically analyzed. /
5721	struct cp_parameter_declarator {
5722	/ The next parameter, or NULL_TREE if none. /
5723	cp_parameter_declarator *next;
5724	/ The decl-specifiers-seq for the parameter. /
5725	cp_decl_specifier_seq decl_specifiers;
5726	/ The declarator for the parameter. /
5727	cp_declarator *declarator;
5728	/ The default-argument expression, or NULL_TREE, if none. /
5729	tree default_argument;
5730	/ True iff this is a template parameter pack. /
5731	bool template_parameter_pack_p;
5732	/ Location within source. /
5733	location_t loc;
5734	};
5735
5736	/ A declarator. /
5737	struct cp_declarator {
5738	/ The kind of declarator. /
5739	ENUM_BITFIELD (cp_declarator_kind) kind : `4`;
5740	/ Whether we parsed an ellipsis (`...') just before the declarator,*
5741	to indicate this is a parameter pack. /*
5742	BOOL_BITFIELD parameter_pack_p : `1`;
5743	/ If this declarator is parenthesized, this the open-paren. It is*
5744	UNKNOWN_LOCATION when not parenthesized. /*
5745	location_t parenthesized;
5746
5747	location_t id_loc; / Currently only set for cdk_id, cdk_decomp and*
5748	cdk_function. /*
5749	/ GNU Attributes that apply to this declarator. If the declarator*
5750	is a pointer or a reference, these attribute apply to the type
5751	pointed to. /*
5752	tree attributes;
5753	/ Standard C++11 attributes that apply to this declarator. If the*
5754	declarator is a pointer or a reference, these attributes apply
5755	to the pointer, rather than to the type pointed to. /*
5756	tree std_attributes;
5757	/ For all but cdk_id, cdk_decomp and cdk_error, the contained declarator.*
5758	For cdk_id, cdk_decomp and cdk_error, guaranteed to be NULL. /*
5759	cp_declarator *declarator;
5760	union {
5761	/ For identifiers. /
5762	struct {
5763	/ If non-NULL, the qualifying scope (a NAMESPACE_DECL or*
5764	_TYPE) for this identifier. /
5765	tree qualifying_scope;
5766	/ The unqualified name of the entity -- an IDENTIFIER_NODE,*
5767	BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. /*
5768	tree unqualified_name;
5769	/ If this is the name of a function, what kind of special*
5770	function (if any). /*
5771	special_function_kind sfk;
5772	} id;
5773	/ For functions. /
5774	struct {
5775	/ The parameters to the function as a TREE_LIST of decl/default. /
5776	tree parameters;
5777	/ The cv-qualifiers for the function. /
5778	cp_cv_quals qualifiers;
5779	/ The virt-specifiers for the function. /
5780	cp_virt_specifiers virt_specifiers;
5781	/ The ref-qualifier for the function. /
5782	cp_ref_qualifier ref_qualifier;
5783	/ The transaction-safety qualifier for the function. /
5784	tree tx_qualifier;
5785	/ The exception-specification for the function. /
5786	tree exception_specification;
5787	/ The late-specified return type, if any. /
5788	tree late_return_type;
5789	/ The trailing requires-clause, if any. /
5790	tree requires_clause;
5791	} function;
5792	/ For arrays. /
5793	struct {
5794	/ The bounds to the array. /
5795	tree bounds;
5796	} array;
5797	/ For cdk_pointer and cdk_ptrmem. /
5798	struct {
5799	/ The cv-qualifiers for the pointer. /
5800	cp_cv_quals qualifiers;
5801	/ For cdk_ptrmem, the class type containing the member. /
5802	tree class_type;
5803	} pointer;
5804	/ For cdk_reference /
5805	struct {
5806	/ The cv-qualifiers for the reference. These qualifiers are*
5807	only used to diagnose ill-formed code. /*
5808	cp_cv_quals qualifiers;
5809	/ Whether this is an rvalue reference /
5810	bool rvalue_ref;
5811	} reference;
5812	} u;
5813	};
5814
5815	/ A level of template instantiation. /
5816	struct GTY((chain_next ("%h.next"))) tinst_level {
5817	/ The immediately deeper level in the chain. /
5818	struct tinst_level *next;
5819
5820	/ The original node. Can be either a DECL (for a function or static*
5821	data member) or a TYPE (for a class), depending on what we were
5822	asked to instantiate. /*
5823	tree decl;
5824
5825	/ The location where the template is instantiated. /
5826	location_t locus;
5827
5828	/ errorcount+sorrycount when we pushed this level. /
5829	int errors;
5830
5831	/ True if the location is in a system header. /
5832	bool in_system_header_p;
5833	};
5834
5835	bool decl_spec_seq_has_spec_p (const cp_decl_specifier_seq *, cp_decl_spec);
5836
5837	/ Return the type of the `this' parameter of FNTYPE. /
5838
5839	inline tree
5840	type_of_this_parm (const_tree fntype)
5841	{
5842	function_args_iterator iter;
5843	gcc_assert (TREE_CODE (fntype) == METHOD_TYPE);
5844	function_args_iter_init (&iter, fntype);
5845	return function_args_iter_cond (&iter);
5846	}
5847
5848	/ Return the class of the `this' parameter of FNTYPE. /
5849
5850	inline tree
5851	class_of_this_parm (const_tree fntype)
5852	{
5853	return TREE_TYPE (type_of_this_parm (fntype));
5854	}
5855
5856	/ True iff T is a variable template declaration. /
5857	inline bool
5858	variable_template_p (tree t)
5859	{
5860	if (TREE_CODE (t) != TEMPLATE_DECL)
5861	return false;
5862	if (!PRIMARY_TEMPLATE_P (t))
5863	return false;
5864	if (tree r = DECL_TEMPLATE_RESULT (t))
5865	return VAR_P (r);
5866	return false;
5867	}
5868
5869	/ True iff T is a variable concept definition. That is, T is*
5870	a variable template declared with the concept specifier. /*
5871	inline bool
5872	variable_concept_p (tree t)
5873	{
5874	if (TREE_CODE (t) != TEMPLATE_DECL)
5875	return false;
5876	if (tree r = DECL_TEMPLATE_RESULT (t))
5877	return VAR_P (r) && DECL_DECLARED_CONCEPT_P (r);
5878	return false;
5879	}
5880
5881	/ True iff T is a concept definition. That is, T is a variable or function*
5882	template declared with the concept specifier. /*
5883	inline bool
5884	concept_template_p (tree t)
5885	{
5886	if (TREE_CODE (t) != TEMPLATE_DECL)
5887	return false;
5888	if (tree r = DECL_TEMPLATE_RESULT (t))
5889	return VAR_OR_FUNCTION_DECL_P (r) && DECL_DECLARED_CONCEPT_P (r);
5890	return false;
5891	}
5892
5893	/ A parameter list indicating for a function with no parameters,*
5894	e.g "int f(void)". /*
5895	extern cp_parameter_declarator *no_parameters;
5896
5897	/ Various dump ids. /
5898	extern int class_dump_id;
5899	extern int raw_dump_id;
5900
5901	/ in call.c /
5902	extern bool check_dtor_name (tree, tree);
5903	int magic_varargs_p (tree);
5904
5905	extern tree build_conditional_expr (location_t, tree, tree, tree,
5906	tsubst_flags_t);
5907	extern tree build_addr_func (tree, tsubst_flags_t);
5908	extern void set_flags_from_callee (tree);
5909	extern tree build_call_a (tree, int, tree*);
5910	extern tree build_call_n (tree, int, ...);
5911	extern bool null_ptr_cst_p (tree);
5912	extern bool null_member_pointer_value_p (tree);
5913	extern bool sufficient_parms_p (const_tree);
5914	extern tree type_decays_to (tree);
5915	extern tree extract_call_expr (tree);
5916	extern tree build_user_type_conversion (tree, tree, int,
5917	tsubst_flags_t);
5918	extern tree build_new_function_call (tree, vec<tree, va_gc> **,
5919	tsubst_flags_t);
5920	extern tree build_operator_new_call (tree, vec<tree, va_gc> **,
5921	tree , tree , tree, tree,
5922	tree *, tsubst_flags_t);
5923	extern tree build_new_method_call (tree, tree,
5924	vec<tree, va_gc> **, tree,
5925	int, tree *, tsubst_flags_t);
5926	extern tree build_special_member_call (tree, tree,
5927	vec<tree, va_gc> **,
5928	tree, int, tsubst_flags_t);
5929	extern tree build_new_op (location_t, enum tree_code,
5930	int, tree, tree, tree, tree *,
5931	tsubst_flags_t);
5932	extern tree build_op_call (tree, vec<tree, va_gc> **,
5933	tsubst_flags_t);
5934	extern bool aligned_allocation_fn_p (tree);
5935	extern bool usual_deallocation_fn_p (tree);
5936	extern tree build_op_delete_call (enum tree_code, tree, tree,
5937	bool, tree, tree,
5938	tsubst_flags_t);
5939	extern bool can_convert (tree, tree, tsubst_flags_t);
5940	extern bool can_convert_standard (tree, tree, tsubst_flags_t);
5941	extern bool can_convert_arg (tree, tree, tree, int,
5942	tsubst_flags_t);
5943	extern bool can_convert_arg_bad (tree, tree, tree, int,
5944	tsubst_flags_t);
5945
5946	/ A class for recording information about access failures (e.g. private*
5947	fields), so that we can potentially supply a fix-it hint about
5948	an accessor (from a context in which the constness of the object
5949	is known). /*
5950
5951	class access_failure_info
5952	{
5953	public:
5954	access_failure_info () : m_was_inaccessible (false), m_basetype_path (NULL_TREE),
5955	m_field_decl (NULL_TREE) {}
5956
5957	void record_access_failure (tree basetype_path, tree field_decl);
5958	void maybe_suggest_accessor (bool const_p) const;
5959
5960	private:
5961	bool m_was_inaccessible;
5962	tree m_basetype_path;
5963	tree m_field_decl;
5964	};
5965
5966	extern bool enforce_access (tree, tree, tree,
5967	tsubst_flags_t,
5968	access_failure_info *afi = NULL);
5969	extern void push_defarg_context (tree);
5970	extern void pop_defarg_context (void);
5971	extern tree convert_default_arg (tree, tree, tree, int,
5972	tsubst_flags_t);
5973	extern tree convert_arg_to_ellipsis (tree, tsubst_flags_t);
5974	extern tree build_x_va_arg (source_location, tree, tree);
5975	extern tree cxx_type_promotes_to (tree);
5976	extern tree type_passed_as (tree);
5977	extern tree convert_for_arg_passing (tree, tree, tsubst_flags_t);
5978	extern bool is_properly_derived_from (tree, tree);
5979	extern tree initialize_reference (tree, tree, int,
5980	tsubst_flags_t);
5981	extern tree extend_ref_init_temps (tree, tree, vec<tree, va_gc>**);
5982	extern tree make_temporary_var_for_ref_to_temp (tree, tree);
5983	extern bool type_has_extended_temps (tree);
5984	extern tree strip_top_quals (tree);
5985	extern bool reference_related_p (tree, tree);
5986	extern int remaining_arguments (tree);
5987	extern tree perform_implicit_conversion (tree, tree, tsubst_flags_t);
5988	extern tree perform_implicit_conversion_flags (tree, tree, tsubst_flags_t, int);
5989	extern tree build_converted_constant_expr (tree, tree, tsubst_flags_t);
5990	extern tree perform_direct_initialization_if_possible (tree, tree, bool,
5991	tsubst_flags_t);
5992	extern tree in_charge_arg_for_name (tree);
5993	extern tree build_cxx_call (tree, int, tree *,
5994	tsubst_flags_t);
5995	extern bool is_std_init_list (tree);
5996	extern bool is_list_ctor (tree);
5997	extern void validate_conversion_obstack (void);
5998	extern void mark_versions_used (tree);
5999	extern tree get_function_version_dispatcher (tree);
6000
6001	/ in class.c /
6002	extern tree build_vfield_ref (tree, tree);
6003	extern tree build_if_in_charge (tree true_stmt, tree false_stmt = void_node);
6004	extern tree build_base_path (enum tree_code, tree,
6005	tree, int, tsubst_flags_t);
6006	extern tree convert_to_base (tree, tree, bool, bool,
6007	tsubst_flags_t);
6008	extern tree convert_to_base_statically (tree, tree);
6009	extern tree build_vtbl_ref (tree, tree);
6010	extern tree build_vfn_ref (tree, tree);
6011	extern tree get_vtable_decl (tree, int);
6012	extern bool add_method (tree, tree, bool);
6013	extern tree declared_access (tree);
6014	extern tree currently_open_class (tree);
6015	extern tree currently_open_derived_class (tree);
6016	extern tree outermost_open_class (void);
6017	extern tree current_nonlambda_class_type (void);
6018	extern tree finish_struct (tree, tree);
6019	extern void finish_struct_1 (tree);
6020	extern int resolves_to_fixed_type_p (tree, int *);
6021	extern void init_class_processing (void);
6022	extern int is_empty_class (tree);
6023	extern bool is_really_empty_class (tree);
6024	extern void pushclass (tree);
6025	extern void popclass (void);
6026	extern void push_nested_class (tree);
6027	extern void pop_nested_class (void);
6028	extern int current_lang_depth (void);
6029	extern void push_lang_context (tree);
6030	extern void pop_lang_context (void);
6031	extern tree instantiate_type (tree, tree, tsubst_flags_t);
6032	extern void print_class_statistics (void);
6033	extern void build_self_reference (void);
6034	extern int same_signature_p (const_tree, const_tree);
6035	extern void maybe_add_class_template_decl_list (tree, tree, int);
6036	extern void unreverse_member_declarations (tree);
6037	extern void invalidate_class_lookup_cache (void);
6038	extern void maybe_note_name_used_in_class (tree, tree);
6039	extern void note_name_declared_in_class (tree, tree);
6040	extern tree get_vtbl_decl_for_binfo (tree);
6041	extern bool vptr_via_virtual_p (tree);
6042	extern void debug_class (tree);
6043	extern void debug_thunks (tree);
6044	extern void set_linkage_according_to_type (tree, tree);
6045	extern void determine_key_method (tree);
6046	extern void check_for_override (tree, tree);
6047	extern void push_class_stack (void);
6048	extern void pop_class_stack (void);
6049	extern bool default_ctor_p (tree);
6050	extern bool type_has_user_nondefault_constructor (tree);
6051	extern tree in_class_defaulted_default_constructor (tree);
6052	extern bool user_provided_p (tree);
6053	extern bool type_has_user_provided_constructor (tree);
6054	extern bool type_has_non_user_provided_default_constructor (tree);
6055	extern bool vbase_has_user_provided_move_assign (tree);
6056	extern tree default_init_uninitialized_part (tree);
6057	extern bool trivial_default_constructor_is_constexpr (tree);
6058	extern bool type_has_constexpr_default_constructor (tree);
6059	extern bool type_has_virtual_destructor (tree);
6060	extern bool classtype_has_move_assign_or_move_ctor_p (tree, bool user_declared);
6061	extern bool type_build_ctor_call (tree);
6062	extern bool type_build_dtor_call (tree);
6063	extern void explain_non_literal_class (tree);
6064	extern void inherit_targ_abi_tags (tree);
6065	extern void defaulted_late_check (tree);
6066	extern bool defaultable_fn_check (tree);
6067	extern void check_abi_tags (tree);
6068	extern tree missing_abi_tags (tree);
6069	extern void fixup_type_variants (tree);
6070	extern void fixup_attribute_variants (tree);
6071	extern tree* decl_cloned_function_p (const_tree, bool);
6072	extern void clone_function_decl (tree, bool);
6073	extern void adjust_clone_args (tree);
6074	extern void deduce_noexcept_on_destructor (tree);
6075	extern bool uniquely_derived_from_p (tree, tree);
6076	extern bool publicly_uniquely_derived_p (tree, tree);
6077	extern tree common_enclosing_class (tree, tree);
6078
6079	/ in cvt.c /
6080	extern tree convert_to_reference (tree, tree, int, int, tree,
6081	tsubst_flags_t);
6082	extern tree convert_from_reference (tree);
6083	extern tree force_rvalue (tree, tsubst_flags_t);
6084	extern tree ocp_convert (tree, tree, int, int,
6085	tsubst_flags_t);
6086	extern tree cp_convert (tree, tree, tsubst_flags_t);
6087	extern tree cp_convert_and_check (tree, tree, tsubst_flags_t);
6088	extern tree cp_fold_convert (tree, tree);
6089	extern tree cp_get_callee (tree);
6090	extern tree cp_get_callee_fndecl (tree);
6091	extern tree cp_get_fndecl_from_callee (tree);
6092	extern tree convert_to_void (tree, impl_conv_void,
6093	tsubst_flags_t);
6094	extern tree convert_force (tree, tree, int,
6095	tsubst_flags_t);
6096	extern tree build_expr_type_conversion (int, tree, bool);
6097	extern tree type_promotes_to (tree);
6098	extern bool can_convert_qual (tree, tree);
6099	extern tree perform_qualification_conversions (tree, tree);
6100	extern bool tx_safe_fn_type_p (tree);
6101	extern tree tx_unsafe_fn_variant (tree);
6102	extern bool fnptr_conv_p (tree, tree);
6103	extern tree strip_fnptr_conv (tree);
6104
6105	/ in name-lookup.c /
6106	extern void maybe_push_cleanup_level (tree);
6107	extern tree make_anon_name (void);
6108	extern tree check_for_out_of_scope_variable (tree);
6109	extern void dump (cp_binding_level &ref);
6110	extern void dump (cp_binding_level *ptr);
6111	extern void print_other_binding_stack (cp_binding_level *);
6112	extern tree maybe_push_decl (tree);
6113	extern tree current_decl_namespace (void);
6114
6115	/ decl.c /
6116	extern tree poplevel (int, int, int);
6117	extern void cxx_init_decl_processing (void);
6118	enum cp_tree_node_structure_enum cp_tree_node_structure
6119	(union lang_tree_node *);
6120	extern void finish_scope (void);
6121	extern void push_switch (tree);
6122	extern void pop_switch (void);
6123	extern void note_break_stmt (void);
6124	extern bool note_iteration_stmt_body_start (void);
6125	extern void note_iteration_stmt_body_end (bool);
6126	extern tree make_lambda_name (void);
6127	extern int decls_match (tree, tree, bool = true);
6128	extern bool maybe_version_functions (tree, tree);
6129	extern tree duplicate_decls (tree, tree, bool);
6130	extern tree declare_local_label (tree);
6131	extern tree define_label (location_t, tree);
6132	extern void check_goto (tree);
6133	extern bool check_omp_return (void);
6134	extern tree make_typename_type (tree, tree, enum tag_types, tsubst_flags_t);
6135	extern tree build_typename_type (tree, tree, tree, tag_types);
6136	extern tree make_unbound_class_template (tree, tree, tree, tsubst_flags_t);
6137	extern tree build_library_fn_ptr (const char , tree, int*);
6138	extern tree build_cp_library_fn_ptr (const char , tree, int*);
6139	extern tree push_library_fn (tree, tree, tree, int);
6140	extern tree push_void_library_fn (tree, tree, int);
6141	extern tree push_throw_library_fn (tree, tree);
6142	extern void warn_misplaced_attr_for_class_type (source_location location,
6143	tree class_type);
6144	extern tree check_tag_decl (cp_decl_specifier_seq , bool*);
6145	extern tree shadow_tag (cp_decl_specifier_seq *);
6146	extern tree groktypename (cp_decl_specifier_seq , const* cp_declarator , bool*);
6147	extern tree start_decl (const cp_declarator , cp_decl_specifier_seq , int, tree, tree, tree *);
6148	extern void start_decl_1 (tree, bool);
6149	extern bool check_array_initializer (tree, tree, tree);
6150	extern void cp_finish_decl (tree, tree, bool, tree, int);
6151	extern tree lookup_decomp_type (tree);
6152	extern void cp_finish_decomp (tree, tree, unsigned int);
6153	extern int cp_complete_array_type (tree , tree, bool*);
6154	extern int cp_complete_array_type_or_error (tree , tree, bool*, tsubst_flags_t);
6155	extern tree build_ptrmemfunc_type (tree);
6156	extern tree build_ptrmem_type (tree, tree);
6157	/ the grokdeclarator prototype is in decl.h /
6158	extern tree build_this_parm (tree, tree, cp_cv_quals);
6159	extern tree grokparms (tree, tree *);
6160	extern int copy_fn_p (const_tree);
6161	extern bool move_fn_p (const_tree);
6162	extern bool move_signature_fn_p (const_tree);
6163	extern tree get_scope_of_declarator (const cp_declarator *);
6164	extern void grok_special_member_properties (tree);
6165	extern bool grok_ctor_properties (const_tree, const_tree);
6166	extern bool grok_op_properties (tree, bool);
6167	extern tree xref_tag (enum tag_types, tree, tag_scope, bool);
6168	extern tree xref_tag_from_type (tree, tree, tag_scope);
6169	extern void xref_basetypes (tree, tree);
6170	extern tree start_enum (tree, tree, tree, tree, bool, bool *);
6171	extern void finish_enum_value_list (tree);
6172	extern void finish_enum (tree);
6173	extern void build_enumerator (tree, tree, tree, tree, location_t);
6174	extern tree lookup_enumerator (tree, tree);
6175	extern bool start_preparsed_function (tree, tree, int);
6176	extern bool start_function (cp_decl_specifier_seq *,
6177	const cp_declarator *, tree);
6178	extern tree begin_function_body (void);
6179	extern void finish_function_body (tree);
6180	extern tree outer_curly_brace_block (tree);
6181	extern tree finish_function (bool);
6182	extern tree grokmethod (cp_decl_specifier_seq , const* cp_declarator *, tree);
6183	extern void maybe_register_incomplete_var (tree);
6184	extern void maybe_commonize_var (tree);
6185	extern void complete_vars (tree);
6186	extern tree static_fn_type (tree);
6187	extern void revert_static_member_fn (tree);
6188	extern void fixup_anonymous_aggr (tree);
6189	extern tree compute_array_index_type (tree, tree, tsubst_flags_t);
6190	extern tree check_default_argument (tree, tree, tsubst_flags_t);
6191	extern int wrapup_namespace_globals ();
6192	extern tree create_implicit_typedef (tree, tree);
6193	extern int local_variable_p (const_tree);
6194	extern tree register_dtor_fn (tree);
6195	extern tmpl_spec_kind current_tmpl_spec_kind (int);
6196	extern tree cp_fname_init (const char , tree );
6197	extern tree cxx_builtin_function (tree decl);
6198	extern tree cxx_builtin_function_ext_scope (tree decl);
6199	extern tree check_elaborated_type_specifier (enum tag_types, tree, bool);
6200	extern void warn_extern_redeclared_static (tree, tree);
6201	extern tree cxx_comdat_group (tree);
6202	extern bool cp_missing_noreturn_ok_p (tree);
6203	extern bool is_direct_enum_init (tree, tree);
6204	extern void initialize_artificial_var (tree, vec<constructor_elt, va_gc> *);
6205	extern tree check_var_type (tree, tree);
6206	extern tree reshape_init (tree, tree, tsubst_flags_t);
6207	extern tree next_initializable_field (tree);
6208	extern tree fndecl_declared_return_type (tree);
6209	extern bool undeduced_auto_decl (tree);
6210	extern bool require_deduced_type (tree, tsubst_flags_t = tf_warning_or_error);
6211
6212	extern tree finish_case_label (location_t, tree, tree);
6213	extern tree cxx_maybe_build_cleanup (tree, tsubst_flags_t);
6214
6215	/ in decl2.c /
6216	extern void record_mangling (tree, bool);
6217	extern void overwrite_mangling (tree, tree);
6218	extern void note_mangling_alias (tree, tree);
6219	extern void generate_mangling_aliases (void);
6220	extern tree build_memfn_type (tree, tree, cp_cv_quals, cp_ref_qualifier);
6221	extern tree build_pointer_ptrmemfn_type (tree);
6222	extern tree change_return_type (tree, tree);
6223	extern void maybe_retrofit_in_chrg (tree);
6224	extern void maybe_make_one_only (tree);
6225	extern bool vague_linkage_p (tree);
6226	extern void grokclassfn (tree, tree,
6227	enum overload_flags);
6228	extern tree grok_array_decl (location_t, tree, tree, bool);
6229	extern tree delete_sanity (tree, tree, bool, int, tsubst_flags_t);
6230	extern tree check_classfn (tree, tree, tree);
6231	extern void check_member_template (tree);
6232	extern tree grokfield (const cp_declarator , cp_decl_specifier_seq ,
6233	tree, bool, tree, tree);
6234	extern tree grokbitfield (const cp_declarator , cp_decl_specifier_seq ,
6235	tree, tree, tree);
6236	extern bool any_dependent_type_attributes_p (tree);
6237	extern tree cp_reconstruct_complex_type (tree, tree);
6238	extern bool attributes_naming_typedef_ok (tree);
6239	extern void cplus_decl_attributes (tree , tree, int*);
6240	extern void finish_anon_union (tree);
6241	extern void cxx_post_compilation_parsing_cleanups (void);
6242	extern tree coerce_new_type (tree);
6243	extern tree coerce_delete_type (tree);
6244	extern void comdat_linkage (tree);
6245	extern void determine_visibility (tree);
6246	extern void constrain_class_visibility (tree);
6247	extern void reset_type_linkage (tree);
6248	extern void tentative_decl_linkage (tree);
6249	extern void import_export_decl (tree);
6250	extern tree build_cleanup (tree);
6251	extern tree build_offset_ref_call_from_tree (tree, vec<tree, va_gc> **,
6252	tsubst_flags_t);
6253	extern bool decl_defined_p (tree);
6254	extern bool decl_constant_var_p (tree);
6255	extern bool decl_maybe_constant_var_p (tree);
6256	extern void no_linkage_error (tree);
6257	extern void check_default_args (tree);
6258	extern bool mark_used (tree);
6259	extern bool mark_used (tree, tsubst_flags_t);
6260	extern void finish_static_data_member_decl (tree, tree, bool, tree, int);
6261	extern tree cp_build_parm_decl (tree, tree, tree);
6262	extern tree get_guard (tree);
6263	extern tree get_guard_cond (tree, bool);
6264	extern tree set_guard (tree);
6265	extern tree get_tls_wrapper_fn (tree);
6266	extern void mark_needed (tree);
6267	extern bool decl_needed_p (tree);
6268	extern void note_vague_linkage_fn (tree);
6269	extern void note_variable_template_instantiation (tree);
6270	extern tree build_artificial_parm (tree, tree, tree);
6271	extern bool possibly_inlined_p (tree);
6272	extern int parm_index (tree);
6273	extern tree vtv_start_verification_constructor_init_function (void);
6274	extern tree vtv_finish_verification_constructor_init_function (tree);
6275	extern bool cp_omp_mappable_type (tree);
6276
6277	/ in error.c /
6278	extern const char type_as_string (tree, int*);
6279	extern const char type_as_string_translate (tree, int*);
6280	extern const char decl_as_string (tree, int*);
6281	extern const char decl_as_string_translate (tree, int*);
6282	extern const char decl_as_dwarf_string (tree, int*);
6283	extern const char expr_as_string (tree, int*);
6284	extern const char lang_decl_name (tree, int, bool*);
6285	extern const char lang_decl_dwarf_name (tree, int, bool*);
6286	extern const char language_to_string (enum* languages);
6287	extern const char *class_key_or_enum_as_string (tree);
6288	extern void maybe_warn_variadic_templates (void);
6289	extern void maybe_warn_cpp0x (cpp0x_warn_str str);
6290	extern bool pedwarn_cxx98 (location_t, int, const char *, ...) ATTRIBUTE_GCC_DIAG(`3`,`4`);
6291	extern location_t location_of (tree);
6292	extern void qualified_name_lookup_error (tree, tree, tree,
6293	location_t);
6294
6295	/ in except.c /
6296	extern void init_exception_processing (void);
6297	extern tree expand_start_catch_block (tree);
6298	extern void expand_end_catch_block (void);
6299	extern tree build_exc_ptr (void);
6300	extern tree build_throw (tree);
6301	extern int nothrow_libfn_p (const_tree);
6302	extern void check_handlers (tree);
6303	extern tree finish_noexcept_expr (tree, tsubst_flags_t);
6304	extern bool expr_noexcept_p (tree, tsubst_flags_t);
6305	extern void perform_deferred_noexcept_checks (void);
6306	extern bool nothrow_spec_p (const_tree);
6307	extern bool type_noexcept_p (const_tree);
6308	extern bool type_throw_all_p (const_tree);
6309	extern tree build_noexcept_spec (tree, int);
6310	extern void choose_personality_routine (enum languages);
6311	extern tree build_must_not_throw_expr (tree,tree);
6312	extern tree eh_type_info (tree);
6313	extern tree begin_eh_spec_block (void);
6314	extern void finish_eh_spec_block (tree, tree);
6315	extern tree build_eh_type_type (tree);
6316	extern tree cp_protect_cleanup_actions (void);
6317	extern tree create_try_catch_expr (tree, tree);
6318
6319	/ in expr.c /
6320	extern tree cplus_expand_constant (tree);
6321	extern tree mark_rvalue_use (tree,
6322	location_t = UNKNOWN_LOCATION,
6323	bool = true);
6324	extern tree mark_lvalue_use (tree);
6325	extern tree mark_lvalue_use_nonread (tree);
6326	extern tree mark_type_use (tree);
6327	extern tree mark_discarded_use (tree);
6328	extern void mark_exp_read (tree);
6329
6330	/ friend.c /
6331	extern int is_friend (tree, tree);
6332	extern void make_friend_class (tree, tree, bool);
6333	extern void add_friend (tree, tree, bool);
6334	extern tree do_friend (tree, tree, tree, tree, enum overload_flags, bool);
6335
6336	extern void set_global_friend (tree);
6337	extern bool is_global_friend (tree);
6338
6339	/ in init.c /
6340	extern tree expand_member_init (tree);
6341	extern void emit_mem_initializers (tree);
6342	extern tree build_aggr_init (tree, tree, int,
6343	tsubst_flags_t);
6344	extern int is_class_type (tree, int);
6345	extern tree get_type_value (tree);
6346	extern tree build_zero_init (tree, tree, bool);
6347	extern tree build_value_init (tree, tsubst_flags_t);
6348	extern tree build_value_init_noctor (tree, tsubst_flags_t);
6349	extern tree get_nsdmi (tree, bool, tsubst_flags_t);
6350	extern tree build_offset_ref (tree, tree, bool,
6351	tsubst_flags_t);
6352	extern tree throw_bad_array_new_length (void);
6353	extern bool type_has_new_extended_alignment (tree);
6354	extern unsigned malloc_alignment (void);
6355	extern tree build_new (vec<tree, va_gc> **, tree, tree,
6356	vec<tree, va_gc> *, int*,
6357	tsubst_flags_t);
6358	extern tree get_temp_regvar (tree, tree);
6359	extern tree build_vec_init (tree, tree, tree, bool, int,
6360	tsubst_flags_t);
6361	extern tree build_delete (tree, tree,
6362	special_function_kind,
6363	int, int, tsubst_flags_t);
6364	extern void push_base_cleanups (void);
6365	extern tree build_vec_delete (tree, tree,
6366	special_function_kind, int,
6367	tsubst_flags_t);
6368	extern tree create_temporary_var (tree);
6369	extern void initialize_vtbl_ptrs (tree);
6370	extern tree scalar_constant_value (tree);
6371	extern tree decl_really_constant_value (tree);
6372	extern int diagnose_uninitialized_cst_or_ref_member (tree, bool, bool);
6373	extern tree build_vtbl_address (tree);
6374	extern bool maybe_reject_flexarray_init (tree, tree);
6375
6376	/ in lex.c /
6377	extern void cxx_dup_lang_specific_decl (tree);
6378	extern void yyungetc (int, int);
6379
6380	extern tree unqualified_name_lookup_error (tree,
6381	location_t = UNKNOWN_LOCATION);
6382	extern tree unqualified_fn_lookup_error (cp_expr);
6383	extern tree make_conv_op_name (tree);
6384	extern tree build_lang_decl (enum tree_code, tree, tree);
6385	extern tree build_lang_decl_loc (location_t, enum tree_code, tree, tree);
6386	extern void retrofit_lang_decl (tree);
6387	extern void fit_decomposition_lang_decl (tree, tree);
6388	extern tree copy_decl (tree CXX_MEM_STAT_INFO);
6389	extern tree copy_type (tree CXX_MEM_STAT_INFO);
6390	extern tree cxx_make_type (enum tree_code);
6391	extern tree make_class_type (enum tree_code);
6392	extern const char *get_identifier_kind_name (tree);
6393	extern void set_identifier_kind (tree, cp_identifier_kind);
6394	extern bool cxx_init (void);
6395	extern void cxx_finish (void);
6396	extern bool in_main_input_context (void);
6397
6398	/ in method.c /
6399	extern void init_method (void);
6400	extern tree make_thunk (tree, bool, tree, tree);
6401	extern void finish_thunk (tree);
6402	extern void use_thunk (tree, bool);
6403	extern bool trivial_fn_p (tree);
6404	extern tree forward_parm (tree);
6405	extern bool is_trivially_xible (enum tree_code, tree, tree);
6406	extern bool is_xible (enum tree_code, tree, tree);
6407	extern tree get_defaulted_eh_spec (tree, tsubst_flags_t = tf_warning_or_error);
6408	extern void after_nsdmi_defaulted_late_checks (tree);
6409	extern bool maybe_explain_implicit_delete (tree);
6410	extern void explain_implicit_non_constexpr (tree);
6411	extern void deduce_inheriting_ctor (tree);
6412	extern void synthesize_method (tree);
6413	extern tree lazily_declare_fn (special_function_kind,
6414	tree);
6415	extern tree skip_artificial_parms_for (const_tree, tree);
6416	extern int num_artificial_parms_for (const_tree);
6417	extern tree make_alias_for (tree, tree);
6418	extern tree get_copy_ctor (tree, tsubst_flags_t);
6419	extern tree get_copy_assign (tree);
6420	extern tree get_default_ctor (tree);
6421	extern tree get_dtor (tree, tsubst_flags_t);
6422	extern tree strip_inheriting_ctors (tree);
6423	extern tree inherited_ctor_binfo (tree);
6424	extern bool ctor_omit_inherited_parms (tree);
6425	extern tree locate_ctor (tree);
6426	extern tree implicitly_declare_fn (special_function_kind, tree,
6427	bool, tree, tree);
6428
6429	/ In optimize.c /
6430	extern bool maybe_clone_body (tree);
6431
6432	/ In parser.c /
6433	extern tree cp_convert_range_for (tree, tree, tree, tree, unsigned int, bool);
6434	extern bool parsing_nsdmi (void);
6435	extern bool parsing_default_capturing_generic_lambda_in_template (void);
6436	extern void inject_this_parameter (tree, cp_cv_quals);
6437	extern location_t defarg_location (tree);
6438	extern void maybe_show_extern_c_location (void);
6439
6440	/ in pt.c /
6441	extern bool check_template_shadow (tree);
6442	extern tree get_innermost_template_args (tree, int);
6443	extern void maybe_begin_member_template_processing (tree);
6444	extern void maybe_end_member_template_processing (void);
6445	extern tree finish_member_template_decl (tree);
6446	extern void begin_template_parm_list (void);
6447	extern bool begin_specialization (void);
6448	extern void reset_specialization (void);
6449	extern void end_specialization (void);
6450	extern void begin_explicit_instantiation (void);
6451	extern void end_explicit_instantiation (void);
6452	extern void check_unqualified_spec_or_inst (tree, location_t);
6453	extern tree check_explicit_specialization (tree, tree, int, int);
6454	extern int num_template_headers_for_class (tree);
6455	extern void check_template_variable (tree);
6456	extern tree make_auto (void);
6457	extern tree make_decltype_auto (void);
6458	extern tree make_template_placeholder (tree);
6459	extern bool template_placeholder_p (tree);
6460	extern tree do_auto_deduction (tree, tree, tree);
6461	extern tree do_auto_deduction (tree, tree, tree,
6462	tsubst_flags_t,
6463	auto_deduction_context,
6464	tree = NULL_TREE,
6465	int = LOOKUP_NORMAL);
6466	extern tree type_uses_auto (tree);
6467	extern tree type_uses_auto_or_concept (tree);
6468	extern void append_type_to_template_for_access_check (tree, tree, tree,
6469	location_t);
6470	extern tree convert_generic_types_to_packs (tree, int, int);
6471	extern tree splice_late_return_type (tree, tree);
6472	extern bool is_auto (const_tree);
6473	extern tree process_template_parm (tree, location_t, tree,
6474	bool, bool);
6475	extern tree end_template_parm_list (tree);
6476	extern void end_template_parm_list (void);
6477	extern void end_template_decl (void);
6478	extern tree maybe_update_decl_type (tree, tree);
6479	extern bool check_default_tmpl_args (tree, tree, bool, bool, int);
6480	extern tree push_template_decl (tree);
6481	extern tree push_template_decl_real (tree, bool);
6482	extern

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