Home | History | Annotate | Line # | Download | only in include 
      1 /* Structures that hang off cpp_identifier, for PCH.
      2    Copyright (C) 1986-2018 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 };
     83