1 /* Structures that hang off cpp_identifier, for PCH. 2 Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 3 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify it 6 under the terms of the GNU General Public License as published by the 7 Free Software Foundation; either version 2, or (at your option) any 8 later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program; if not, write to the Free Software 17 Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ 18 19 #include "cpplib.h" 20 21 #if !defined (HAVE_UCHAR) 22 typedef unsigned char uchar; 23 #endif 24 25 #define U (const unsigned char *) /* Intended use: U"string" */ 26 27 /* Chained list of answers to an assertion. */ 28 struct answer GTY(()) 29 { 30 struct answer *next; 31 unsigned int count; 32 cpp_token GTY ((length ("%h.count"))) first[1]; 33 }; 34 35 /* Each macro definition is recorded in a cpp_macro structure. 36 Variadic macros cannot occur with traditional cpp. */ 37 struct cpp_macro GTY(()) 38 { 39 /* Parameters, if any. */ 40 cpp_hashnode ** GTY ((nested_ptr (union tree_node, 41 "%h ? CPP_HASHNODE (GCC_IDENT_TO_HT_IDENT (%h)) : NULL", 42 "%h ? HT_IDENT_TO_GCC_IDENT (HT_NODE (%h)) : NULL"), 43 length ("%h.paramc"))) 44 params; 45 46 /* Replacement tokens (ISO) or replacement text (traditional). See 47 comment at top of cpptrad.c for how traditional function-like 48 macros are encoded. */ 49 union cpp_macro_u 50 { 51 cpp_token * GTY ((tag ("0"), length ("%0.count"))) tokens; 52 const unsigned char * GTY ((tag ("1"))) text; 53 } GTY ((desc ("%1.traditional"))) exp; 54 55 /* Definition line number. */ 56 source_location line; 57 58 /* Number of tokens in expansion, or bytes for traditional macros. */ 59 unsigned int count; 60 61 /* Number of parameters. */ 62 unsigned short paramc; 63 64 /* If a function-like macro. */ 65 unsigned int fun_like : 1; 66 67 /* If a variadic macro. */ 68 unsigned int variadic : 1; 69 70 /* If macro defined in system header. */ 71 unsigned int syshdr : 1; 72 73 /* Nonzero if it has been expanded or had its existence tested. */ 74 unsigned int used : 1; 75 76 /* Indicate which field of 'exp' is in use. */ 77 unsigned int traditional : 1; 78 }; 79