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