libcpp/include/cpp-id-data.h

   1 /* Structures that hang off cpp_identifier, for PCH.
   2    Copyright (C) 1986-2015 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.  If parameter names use extended identifiers,
  37      the original spelling of those identifiers, not the canonical
  38      UTF-8 spelling, goes here.  */
  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 unsigned char * 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
  78   /* Indicate whether the tokens include extra CPP_PASTE tokens at the
  79      end to track invalid redefinitions with consecutive CPP_PASTE
  80      tokens.  */
  81   unsigned int extra_tokens : 1;
  82 };