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 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18
  19 #include "cpplib.h"
  20
  21 #ifndef HAVE_UCHAR
  22 typedef unsigned char uchar;
  23 #endif
  24 #define U (const uchar *)  /* Intended use: U"string" */
  25
  26 /* Chained list of answers to an assertion.  */
  27 struct answer GTY(())
  28 {
  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 cpp_macro GTY(())
  37 {
  38   /* Parameters, if any.  */
  39   cpp_hashnode ** GTY ((nested_ptr (union tree_node,
  40                 "%h ? CPP_HASHNODE (GCC_IDENT_TO_HT_IDENT (%h)) : NULL",
  41                         "%h ? HT_IDENT_TO_GCC_IDENT (HT_NODE (%h)) : NULL"),
  42                         length ("%h.paramc")))
  43     params;
  44
  45   /* Replacement tokens (ISO) or replacement text (traditional).  See
  46      comment at top of cpptrad.c for how traditional function-like
  47      macros are encoded.  */
  48   union cpp_macro_u
  49   {
  50     cpp_token * GTY ((tag ("0"), length ("%0.count"))) tokens;
  51     const uchar * GTY ((tag ("1"))) text;
  52   } GTY ((desc ("%1.traditional"))) exp;
  53
  54   /* Definition line number.  */
  55   source_location line;
  56
  57   /* Number of tokens in expansion, or bytes for traditional macros.  */
  58   unsigned int count;
  59
  60   /* Number of parameters.  */
  61   unsigned short paramc;
  62
  63   /* If a function-like macro.  */
  64   unsigned int fun_like : 1;
  65
  66   /* If a variadic macro.  */
  67   unsigned int variadic : 1;
  68
  69   /* If macro defined in system header.  */
  70   unsigned int syshdr   : 1;
  71
  72   /* Nonzero if it has been expanded or had its existence tested.  */
  73   unsigned int used     : 1;
  74
  75   /* Indicate which field of 'exp' is in use.  */
  76   unsigned int traditional : 1;
  77 };