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
5This program is free software; you can redistribute it and/or modify it
6under the terms of the GNU General Public License as published by the
7Free Software Foundation; either version 2, or (at your option) any
8later version.
9
10This program is distributed in the hope that it will be useful,
11but WITHOUT ANY WARRANTY; without even the implied warranty of
12MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13GNU General Public License for more details.
14
15You should have received a copy of the GNU General Public License
16along with this program; if not, write to the Free Software
17Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
18
19#include "cpplib.h"
20
21#if !defined (HAVE_UCHAR) && !defined (IN_GCC)
22typedef unsigned char uchar;
23#endif
24
25#define U (const unsigned char *)  /* Intended use: U"string" */
26
27/* Chained list of answers to an assertion.  */
28struct 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.  */
37struct 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};
79