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, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2007, 2010
5   Free Software Foundation, Inc.
6
7This file is part of GCC.
8
9GCC is free software; you can redistribute it and/or modify
10it under the terms of the GNU General Public License as published by
11the Free Software Foundation; either version 3, or (at your option)
12any later version.
13
14GCC is distributed in the hope that it will be useful,
15but WITHOUT ANY WARRANTY; without even the implied warranty of
16MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17GNU General Public License for more details.
18
19You should have received a copy of the GNU General Public License
20along with GCC; see the file COPYING3.  If not see
21<http://www.gnu.org/licenses/>.  */
22
23
24/* Objective-C types.  */
25DEFTREECODE (CLASS_INTERFACE_TYPE, "class_interface_type", tcc_type, 0)
26DEFTREECODE (CLASS_IMPLEMENTATION_TYPE, "class_implementation_type",
27	     tcc_type, 0)
28DEFTREECODE (CATEGORY_INTERFACE_TYPE, "category_interface_type", tcc_type, 0)
29DEFTREECODE (CATEGORY_IMPLEMENTATION_TYPE,"category_implementation_type",
30	     tcc_type, 0)
31DEFTREECODE (PROTOCOL_INTERFACE_TYPE, "protocol_interface_type", tcc_type, 0)
32
33/* Objective-C decls.  */
34DEFTREECODE (KEYWORD_DECL, "keyword_decl", tcc_declaration, 0)
35DEFTREECODE (INSTANCE_METHOD_DECL, "instance_method_decl", tcc_declaration, 0)
36DEFTREECODE (CLASS_METHOD_DECL, "class_method_decl", tcc_declaration, 0)
37DEFTREECODE (PROPERTY_DECL, "property_decl", tcc_declaration, 0)
38
39/* Objective-C expressions.  */
40DEFTREECODE (MESSAGE_SEND_EXPR, "message_send_expr", tcc_expression, 3)
41DEFTREECODE (CLASS_REFERENCE_EXPR, "class_reference_expr", tcc_expression, 1)
42
43/* This tree is used to represent the expression 'object.property',
44   where 'object' is an Objective-C object and 'property' is an
45   Objective-C property.  Operand 0 is the object (the tree
46   representing the expression), and Operand 1 is the property (the
47   PROPERTY_DECL).  Operand 2 is the 'getter' call, ready to be used;
48   we pregenerate it because it is hard to generate it properly later
49   on.  Operand 3 records whether using the 'getter' call should
50   generate a deprecation warning or not.
51
52   A PROPERTY_REF tree needs to be transformed into 'setter' and
53   'getter' calls at some point; at the moment this happens in two
54   places:
55
56     * if we detect that a modify expression is being applied to a
57       PROPERTY_REF, then we transform that into a 'getter' call (this
58       happens in build_modify_expr() or cp_build_modify_expr()).
59
60    * else, it will remain as a PROPERTY_REF until we get to
61      gimplification; at that point, we convert each PROPERTY_REF into
62      a 'getter' call during ObjC/ObjC++ gimplify.  At that point, it
63      is quite hard to build a 'getter' call, but we have already built
64      it and we just need to swap Operand 2 in, and emit the deprecation
65      warnings from Operand 3 if needed.
66
67  Please note that when the Objective-C 2.0 "dot-syntax" 'object.component'
68  is encountered, where 'component' is not a property but there are valid
69  setter/getter methods for it, an artificial PROPERTY_DECL is generated
70  and used in the PROPERTY_REF.  */
71DEFTREECODE (PROPERTY_REF, "property_ref", tcc_expression, 4)
72
73/*
74Local variables:
75mode:c
76End:
77*/
78