File:  [gforth] / gforth / vmgen-ex / mini.l
Revision 1.7: download - view: text, annotated - select for diffs
Mon Dec 31 19:02:25 2007 UTC (11 years, 10 months ago) by anton
Branches: MAIN
CVS tags: v0-7-0, HEAD
updated copyright year after changing license notice

    1: %{
    2: /* front-end scanner for vmgen example
    3: 
    4:   Copyright (C) 2001,2003,2007 Free Software Foundation, Inc.
    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 3
   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, see http://www.gnu.org/licenses/.
   20: */
   21: 
   22: /* % option yylineno (flex option, implied by flex -l) */
   23: 
   24: #include <stdlib.h>
   25: #include <string.h>
   26: char *mystrdup(const char *s)
   27: {
   28:   char *t=malloc(strlen(s)+1);
   29:   return strcpy(t,s);
   30: }
   31: %}
   32: 
   33: %%
   34: [-();,+*&|<=!]	return yytext[0];
   35: :=	return BECOMES;
   36: func	return FUNC;
   37: return	return RETURN;
   38: end	return END;
   39: var	return VAR;
   40: if	return IF;
   41: then	return THEN;
   42: else	return ELSE;
   43: while	return WHILE;
   44: do	return DO;
   45: print	return PRINT;
   46: [0-9]+			{ yylval.num=strtol(yytext,NULL,10); return NUM; }
   47: [a-zA-Z\_][a-zA-Z0-9\_]*	{ yylval.string=mystrdup(yytext); return IDENT; }
   48: [ \t\n]	;
   49: [/][/].*	;
   50: .		yyerror("illegal character"); exit(1);
   51: %%

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