Annotation of gforth/vmgen-ex2/mini.l, revision 1.5

1.5     ! anton       1: %{
1.1       anton       2: /* front-end scanner for vmgen example
                      3: 
1.4       anton       4:   Copyright (C) 2001,2003 Free Software Foundation, Inc.
1.1       anton       5: 
                      6:   This file is part of Gforth.
                      7: 
                      8:   Gforth is free software; you can redistribute it and/or
                      9:   modify it under the terms of the GNU General Public License
                     10:   as published by the Free Software Foundation; either version 2
                     11:   of the License, or (at your option) any later version.
                     12: 
                     13:   This program is distributed in the hope that it will be useful,
                     14:   but WITHOUT ANY WARRANTY; without even the implied warranty of
                     15:   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     16:   GNU General Public License for more details.
                     17: 
                     18:   You should have received a copy of the GNU General Public License
                     19:   along with this program; if not, write to the Free Software
                     20:   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
                     21: */
                     22: 
                     23: /* %option yylineno (flex option, implied by flex -l) */
                     24: 
1.3       anton      25: #include <stdlib.h>
1.2       anton      26: #include <string.h>
1.3       anton      27: char *mystrdup(const char *s)
                     28: {
                     29:   char *t=malloc(strlen(s)+1);
                     30:   return strcpy(t,s);
                     31: }
1.2       anton      32: %}
                     33: 
1.1       anton      34: %%
                     35: [-();,+*&|<=!] return yytext[0];
                     36: :=     return BECOMES;
                     37: func   return FUNC;
                     38: return return RETURN;
                     39: end    return END;
                     40: var    return VAR;
                     41: if     return IF;
                     42: then   return THEN;
                     43: else   return ELSE;
                     44: while  return WHILE;
                     45: do     return DO;
                     46: print  return PRINT;
                     47: [0-9]+                 { yylval.num=strtol(yytext,NULL,10); return NUM; }
1.3       anton      48: [a-zA-Z\_][a-zA-Z0-9\_]*       { yylval.string=mystrdup(yytext); return IDENT; }
1.1       anton      49: [ \t\n]        ;
                     50: [/][/].*       ;
                     51: .              yyerror("illegal character"); exit(1);
                     52: %%

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