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| 1 : | anton | 1.5 | %{ |
| 2 : | anton | 1.1 | /* front-end scanner for vmgen example |
| 3 : | |||
| 4 : | anton | 1.7 | Copyright (C) 2001,2003,2007 Free Software Foundation, Inc. |
| 5 : | anton | 1.1 | |
| 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 : | anton | 1.6 | as published by the Free Software Foundation, either version 3 |
| 11 : | anton | 1.1 | 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 : | anton | 1.6 | along with this program; if not, see http://www.gnu.org/licenses/. |
| 20 : | anton | 1.1 | */ |
| 21 : | |||
| 22 : | anton | 1.5 | /* % option yylineno (flex option, implied by flex -l) */ |
| 23 : | anton | 1.1 | |
| 24 : | anton | 1.3 | #include <stdlib.h> |
| 25 : | anton | 1.2 | #include <string.h> |
| 26 : | anton | 1.3 | char *mystrdup(const char *s) |
| 27 : | { | ||
| 28 : | char *t=malloc(strlen(s)+1); | ||
| 29 : | return strcpy(t,s); | ||
| 30 : | } | ||
| 31 : | anton | 1.2 | %} |
| 32 : | |||
| 33 : | anton | 1.1 | %% |
| 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 : | anton | 1.3 | [a-zA-Z\_][a-zA-Z0-9\_]* { yylval.string=mystrdup(yytext); return IDENT; } |
| 48 : | anton | 1.1 | [ \t\n] ; |
| 49 : | [/][/].* ; | ||
| 50 : | . yyerror("illegal character"); exit(1); | ||
| 51 : | %% |
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