1/* 2 * This file is part of flex. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE. 22 */ 23 24%parse-param { void* scanner } 25%lex-param { void* scanner } 26 27/* 28 How to compile: 29 bison --defines --output-file="bison_yylloc_parser.c" --name-prefix="test" parser.y 30 */ 31%{ 32#include <stdio.h> 33#include <stdlib.h> 34#include <string.h> 35#include "config.h" 36#include "bison_yylloc_parser.h" 37#include "bison_yylloc_scanner.h" 38 39int yyerror(YYLTYPE *location, void* scanner, const char* msg); 40 41#define YYERROR_VERBOSE 1 42 43 44/* A dummy function. A check against seg-faults in yylval->str. */ 45static int process_text(char* s) { 46 int total =0; 47 while(*s) { 48 total += (int) *s; 49 ++s; 50 } 51 return total; 52} 53 54 55%} 56 57%pure-parser 58 59%union { 60 int lineno; 61 char * str; 62} 63%token <str> IDENT 64%token <lineno> LINENO 65%token EQUAL "=" 66%token COLON ":" 67%token SPACE " " 68%% 69 70file: 71 line 72 | file line 73 ; 74 75line: 76 LINENO COLON SPACE IDENT EQUAL IDENT 77 { 78 process_text($4); 79 process_text($6); 80 /* Check lineno. */ 81 if( $1 != @1.first_line || $1 != testget_lineno(scanner)) 82 { 83 yyerror(0, 0, "Parse failed: Line numbers do not match."); 84 YYABORT; 85 } 86 87 /* Recreate the line to stdout. */ 88 printf ( "%04d: %s=%s\n", @1.first_line, $4, $6); 89 } 90 ; 91 92%% 93 94int yyerror(YYLTYPE *location, void* scanner, const char* msg) { 95 (void)location; 96 (void)scanner; 97 fprintf(stderr,"%s\n",msg); 98 return 0; 99} 100 101