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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  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 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 };