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 39 int 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. */ 45 static 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 70 file: 71 line 72 | file line 73 ; 74 75 line: 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 94 int 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