src/scan.h

   1 /* coded by Ketmar // Vampire Avalon (psyc://ketmar.no-ip.org/~Ketmar)
   2  * Understanding is not required. Only obedience.
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any 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.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 /*
  18  * scan.h - the jam yacc scanner
  19  *
  20  * The yymode() function is for the parser to adjust the lexicon of the
  21  * scanner.  Aside from normal keyword scanning, there is a mode to
  22  * handle action strings (look only for the closing }) and a mode to
  23  * ignore most keywords when looking for a punctuation keyword.  This
  24  * allows non-punctuation keywords to be used in lists without quoting.
  25  */
  26 #ifndef JAMH_SCAN_H
  27 #define JAMH_SCAN_H
  28
  29
  30 /*
  31  * token_t - value of a lexical token
  32  */
  33 typedef struct {
  34   int type;
  35   const char *string;
  36   int strlit; /* !0: don't do variable expansion in string */
  37   PARSE *parse;
  38   LIST *list;
  39   int number;
  40   int line;
  41   int pos;
  42   const char *file; // newstr()
  43 } token_t;
  44
  45 extern token_t yylval;
  46
  47 extern void yyerror (const token_t *tk, const char *s);
  48 extern void yyfparse (const char *s);
  49 extern int yylex (void);
  50
  51
  52 enum {
  53   SCAN_NORMAL, /* normal parsing */
  54   SCAN_STRING, /* look only for matching '}' */
  55   SCAN_PUNCT   /* only punctuation keywords */
  56 };
  57
  58 extern void yymode (int n);
  59
  60
  61 #endif