libcpp/include/cpp-id-data.h

   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, 2009 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 3, 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; see the file COPYING3.  If not see
  17 <http://www.gnu.org/licenses/>.  */
  18
  19 #include "cpplib.h"
  20
  21 #if !defined (HAVE_UCHAR) && !defined (IN_GCC)
  22 typedef unsigned char uchar;
  23 #endif
  24
  25 #define UC (const unsigned char *)  /* Intended use: UC"string" */
  26
  27 /* Chained list of answers to an assertion.  */
  28 struct GTY(()) answer {
  29   struct answer *next;
  30   unsigned int count;
  31   cpp_token GTY ((length ("%h.count"))) first[1];
  32 };
  33
  34 /* Each macro definition is recorded in a cpp_macro structure.
  35    Variadic macros cannot occur with traditional cpp.  */
  36 struct GTY(()) cpp_macro {
  37   /* Parameters, if any.  */
  38   cpp_hashnode ** GTY ((nested_ptr (union tree_node,
  39                 "%h ? CPP_HASHNODE (GCC_IDENT_TO_HT_IDENT (%h)) : NULL",
  40                         "%h ? HT_IDENT_TO_GCC_IDENT (HT_NODE (%h)) : NULL"),
  41                         length ("%h.paramc")))
  42     params;
  43
  44   /* Replacement tokens (ISO) or replacement text (traditional).  See
  45      comment at top of cpptrad.c for how traditional function-like
  46      macros are encoded.  */
  47   union cpp_macro_u
  48   {
  49     cpp_token * GTY ((tag ("0"), length ("%0.count"))) tokens;
  50     const unsigned char * GTY ((tag ("1"))) text;
  51   } GTY ((desc ("%1.traditional"))) exp;
  52
  53   /* Definition line number.  */
  54   source_location line;
  55
  56   /* Number of tokens in expansion, or bytes for traditional macros.  */
  57   unsigned int count;
  58
  59   /* Number of parameters.  */
  60   unsigned short paramc;
  61
  62   /* If a function-like macro.  */
  63   unsigned int fun_like : 1;
  64
  65   /* If a variadic macro.  */
  66   unsigned int variadic : 1;
  67
  68   /* If macro defined in system header.  */
  69   unsigned int syshdr   : 1;
  70
  71   /* Nonzero if it has been expanded or had its existence tested.  */
  72   unsigned int used     : 1;
  73
  74   /* Indicate which field of 'exp' is in use.  */
  75   unsigned int traditional : 1;
  76
  77   /* Indicate whether the tokens include extra CPP_PASTE tokens at the
  78      end to track invalid redefinitions with consecutive CPP_PASTE
  79      tokens.  */
  80   unsigned int extra_tokens : 1;
  81 };