1 /* Structures that hang off cpp_identifier, for PCH. 2 Copyright (C) 1986-2013 Free Software Foundation, Inc. 3 4 This program is free software; you can redistribute it and/or modify it 5 under the terms of the GNU General Public License as published by the 6 Free Software Foundation; either version 3, or (at your option) any 7 later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program; see the file COPYING3. If not see 16 <http://www.gnu.org/licenses/>. */ 17 18 #include "cpplib.h" 19 20 #if !defined (HAVE_UCHAR) && !defined (IN_GCC) 21 typedef unsigned char uchar; 22 #endif 23 24 #define UC (const unsigned char *) /* Intended use: UC"string" */ 25 26 /* Chained list of answers to an assertion. */ 27 struct GTY(()) answer { 28 struct answer *next; 29 unsigned int count; 30 cpp_token GTY ((length ("%h.count"))) first[1]; 31 }; 32 33 /* Each macro definition is recorded in a cpp_macro structure. 34 Variadic macros cannot occur with traditional cpp. */ 35 struct GTY(()) cpp_macro { 36 /* Parameters, if any. */ 37 cpp_hashnode ** GTY ((nested_ptr (union tree_node, 38 "%h ? CPP_HASHNODE (GCC_IDENT_TO_HT_IDENT (%h)) : NULL", 39 "%h ? HT_IDENT_TO_GCC_IDENT (HT_NODE (%h)) : NULL"), 40 length ("%h.paramc"))) 41 params; 42 43 /* Replacement tokens (ISO) or replacement text (traditional). See 44 comment at top of cpptrad.c for how traditional function-like 45 macros are encoded. */ 46 union cpp_macro_u 47 { 48 cpp_token * GTY ((tag ("0"), length ("%0.count"))) tokens; 49 const unsigned char * GTY ((tag ("1"))) text; 50 } GTY ((desc ("%1.traditional"))) exp; 51 52 /* Definition line number. */ 53 source_location line; 54 55 /* Number of tokens in expansion, or bytes for traditional macros. */ 56 unsigned int count; 57 58 /* Number of parameters. */ 59 unsigned short paramc; 60 61 /* If a function-like macro. */ 62 unsigned int fun_like : 1; 63 64 /* If a variadic macro. */ 65 unsigned int variadic : 1; 66 67 /* If macro defined in system header. */ 68 unsigned int syshdr : 1; 69 70 /* Nonzero if it has been expanded or had its existence tested. */ 71 unsigned int used : 1; 72 73 /* Indicate which field of 'exp' is in use. */ 74 unsigned int traditional : 1; 75 76 /* Indicate whether the tokens include extra CPP_PASTE tokens at the 77 end to track invalid redefinitions with consecutive CPP_PASTE 78 tokens. */ 79 unsigned int extra_tokens : 1; 80 }; 81