1 | /* This file contains the definitions and documentation for the |
2 | additional tree codes used in the Objective C front end (see tree.def |
3 | for the standard codes). |
4 | Copyright (C) 1990-2023 Free Software Foundation, Inc. |
5 | |
6 | This file is part of GCC. |
7 | |
8 | GCC is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by |
10 | the Free Software Foundation; either version 3, or (at your option) |
11 | any later version. |
12 | |
13 | GCC is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | GNU General Public License for more details. |
17 | |
18 | You should have received a copy of the GNU General Public License |
19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ |
21 | |
22 | |
23 | /* Objective-C types. */ |
24 | DEFTREECODE (CLASS_INTERFACE_TYPE, "class_interface_type" , tcc_type, 0) |
25 | DEFTREECODE (CLASS_IMPLEMENTATION_TYPE, "class_implementation_type" , |
26 | tcc_type, 0) |
27 | DEFTREECODE (CATEGORY_INTERFACE_TYPE, "category_interface_type" , tcc_type, 0) |
28 | DEFTREECODE (CATEGORY_IMPLEMENTATION_TYPE,"category_implementation_type" , |
29 | tcc_type, 0) |
30 | DEFTREECODE (PROTOCOL_INTERFACE_TYPE, "protocol_interface_type" , tcc_type, 0) |
31 | |
32 | /* Objective-C decls. */ |
33 | DEFTREECODE (KEYWORD_DECL, "keyword_decl" , tcc_declaration, 0) |
34 | DEFTREECODE (INSTANCE_METHOD_DECL, "instance_method_decl" , tcc_declaration, 0) |
35 | DEFTREECODE (CLASS_METHOD_DECL, "class_method_decl" , tcc_declaration, 0) |
36 | DEFTREECODE (PROPERTY_DECL, "property_decl" , tcc_declaration, 0) |
37 | |
38 | /* Objective-C expressions. */ |
39 | DEFTREECODE (MESSAGE_SEND_EXPR, "message_send_expr" , tcc_expression, 3) |
40 | DEFTREECODE (CLASS_REFERENCE_EXPR, "class_reference_expr" , tcc_expression, 1) |
41 | |
42 | /* This tree is used to represent the expression 'object.property', |
43 | where 'object' is an Objective-C object and 'property' is an |
44 | Objective-C property. Operand 0 is the object (the tree |
45 | representing the expression), and Operand 1 is the property (the |
46 | PROPERTY_DECL). Operand 2 is the 'getter' call, ready to be used; |
47 | we pregenerate it because it is hard to generate it properly later |
48 | on. Operand 3 records whether using the 'getter' call should |
49 | generate a deprecation warning or not. |
50 | |
51 | A PROPERTY_REF tree needs to be transformed into 'setter' and |
52 | 'getter' calls at some point; at the moment this happens in two |
53 | places: |
54 | |
55 | * if we detect that a modify expression is being applied to a |
56 | PROPERTY_REF, then we transform that into a 'getter' call (this |
57 | happens in build_modify_expr() or cp_build_modify_expr()). |
58 | |
59 | * else, it will remain as a PROPERTY_REF until we get to |
60 | gimplification; at that point, we convert each PROPERTY_REF into |
61 | a 'getter' call during ObjC/ObjC++ gimplify. At that point, it |
62 | is quite hard to build a 'getter' call, but we have already built |
63 | it and we just need to swap Operand 2 in, and emit the deprecation |
64 | warnings from Operand 3 if needed. |
65 | |
66 | Please note that when the Objective-C 2.0 "dot-syntax" 'object.component' |
67 | is encountered, where 'component' is not a property but there are valid |
68 | setter/getter methods for it, an artificial PROPERTY_DECL is generated |
69 | and used in the PROPERTY_REF. */ |
70 | DEFTREECODE (PROPERTY_REF, "property_ref" , tcc_expression, 4) |
71 | |
72 | /* |
73 | Local variables: |
74 | mode:c |
75 | End: |
76 | */ |
77 | |