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1 /* Structures that hang off cpp_identifier, for PCH.
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2 Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
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3 1999, 2000, 2001, 2002, 2003, 2004, 2009 Free Software Foundation, Inc.
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4
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5 This program is free software; you can redistribute it and/or modify it
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6 under the terms of the GNU General Public License as published by the
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7 Free Software Foundation; either version 3, or (at your option) any
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8 later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program; see the file COPYING3. If not see
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17 <http://www.gnu.org/licenses/>. */
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18
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19 #include "cpplib.h"
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20
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21 #if !defined (HAVE_UCHAR) && !defined (IN_GCC)
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22 typedef unsigned char uchar;
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23 #endif
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24
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25 #define UC (const unsigned char *) /* Intended use: UC"string" */
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26
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27 /* Chained list of answers to an assertion. */
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28 struct answer GTY(())
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29 {
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30 struct answer *next;
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31 unsigned int count;
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32 cpp_token GTY ((length ("%h.count"))) first[1];
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33 };
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34
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35 /* Each macro definition is recorded in a cpp_macro structure.
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36 Variadic macros cannot occur with traditional cpp. */
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37 struct cpp_macro GTY(())
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38 {
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39 /* Parameters, if any. */
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40 cpp_hashnode ** GTY ((nested_ptr (union tree_node,
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41 "%h ? CPP_HASHNODE (GCC_IDENT_TO_HT_IDENT (%h)) : NULL",
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42 "%h ? HT_IDENT_TO_GCC_IDENT (HT_NODE (%h)) : NULL"),
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43 length ("%h.paramc")))
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44 params;
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45
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46 /* Replacement tokens (ISO) or replacement text (traditional). See
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47 comment at top of cpptrad.c for how traditional function-like
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48 macros are encoded. */
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49 union cpp_macro_u
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50 {
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51 cpp_token * GTY ((tag ("0"), length ("%0.count"))) tokens;
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52 const unsigned char * GTY ((tag ("1"))) text;
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53 } GTY ((desc ("%1.traditional"))) exp;
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54
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55 /* Definition line number. */
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56 source_location line;
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57
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58 /* Number of tokens in expansion, or bytes for traditional macros. */
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59 unsigned int count;
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60
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61 /* Number of parameters. */
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62 unsigned short paramc;
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63
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64 /* If a function-like macro. */
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65 unsigned int fun_like : 1;
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66
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67 /* If a variadic macro. */
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68 unsigned int variadic : 1;
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69
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70 /* If macro defined in system header. */
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71 unsigned int syshdr : 1;
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72
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73 /* Nonzero if it has been expanded or had its existence tested. */
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74 unsigned int used : 1;
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75
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76 /* Indicate which field of 'exp' is in use. */
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77 unsigned int traditional : 1;
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78 };
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