1 %{ 2 #ifdef YYBISON 3 #define YYLEX_DECL() yylex(void) 4 #define YYERROR_DECL() yyerror(const char *s) 5 static int YYLEX_DECL(); 6 static void YYERROR_DECL(); 7 #endif 8 %} 9 %% 10 start: ; 11 12 %% 13 14 #include <stdio.h> 15 16 static int 17 YYLEX_DECL() { 18 return -1; 19 } 20 21 static void 22 YYERROR_DECL() { 23 printf("%s\n",s); 24 } 25