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, version 3 of the License ONLY.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16 /*
  17  * scan.h - the jam yacc scanner
  18  *
  19  * The yymode() function is for the parser to adjust the lexicon of the
  20  * scanner.  Aside from normal keyword scanning, there is a mode to
  21  * handle action strings (look only for the closing }) and a mode to
  22  * ignore most keywords when looking for a punctuation keyword.  This
  23  * allows non-punctuation keywords to be used in lists without quoting.
  24  */
  25 #ifndef JAMH_SCAN_H
  26 #define JAMH_SCAN_H
  27
  28
  29 /*
  30  * token_t - value of a lexical token
  31  */
  32 typedef struct {
  33   int type;
  34   const char *string;
  35   int strlit; /* !0: don't do variable expansion in string */
  36   PARSE *parse;
  37   LIST *list;
  38   int number;
  39   int line;
  40   int pos;
  41   const char *file; // newstr()
  42 } token_t;
  43
  44 extern token_t yylval;
  45
  46 extern void yyerror (const token_t *tk, const char *s);
  47 extern void yyfparse (const char *s);
  48 extern int yylex (void);
  49
  50
  51 enum {
  52   SCAN_NORMAL, /* normal parsing */
  53   SCAN_STRING, /* look only for matching '}' */
  54   SCAN_PUNCT   /* only punctuation keywords */
  55 };
  56
  57 extern void yymode (int n);
  58
  59
  60 #endif