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  1. %{
  2.     #include <stdio.h>
  3.     #include <stdlib.h>
  4.     void yyerror(const char *s);
  5. }%
  6.  
  7. %token DIGIT INVALID
  8.  
  9. %% 
  10. start   :   DIGIT { printf("Valid input\n"); }
  11.         |   INVALID { printf("Invalid input\n"); }
  12.         ;
  13.  
  14. %% 
  15.  
  16. int main() {
  17.     yyparse();
  18.     return 0;
  19. }
  20.  
  21. void yyerror(const char *s) {
  22.     printf("Syntax Error: %s\n", s);
  23. }
Success #stdin #stdout #stderr 0.02s 6928KB
comments (?)
stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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ERROR: /home/S7Jg34/prog:23:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/Bc4Ma5
language:
Prolog (swi 7.6.4)
created:
4 days ago
visibility:
public

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