    /* Yacc / Bison hl test file.
     * It won't compile :-) Sure !
     */

    %{

    #include <iostream>
    using namespace std;

    extern KateParser *parser;

    %}

    %locations

    %union {
       int int_val;
       double double_val;
       bool bool_val;
       char *string_val;
       char *ident_val;
       struct var *v;
       void *ptr;
    }

    %token <int_val>      TOK_NOT_EQUAL  "!="
    %token <int_val>      TOK_LESSER_E   "<="
    %token <int_val>      TOK_GREATER_E  ">="
    %token <int_val>      TOK_EQUAL_2    "==" //comment
    %token
       PERCENT_DEBUG           "%debug"
       PERCENT_DEFAULT_PREC    "%default-prec"
       PERCENT_DEFINE          "%define"
    ;

    %type <int_val>       type type_proc

    %code top {
      #define _GNU_SOURCE
      #include <stdio.h>
      int val;
    }

    %destructor { free ($$); printf ("%d", @$.first_line); } <*>
    %lex-param   {scanner_mode *mode};
    %parse-param {int *nastiness} {int *randomness}
    %initial-action {
      @$.initialize (file_name);
    };

    %%

    prog:                 KW_PROGRAM ident { parser->start($2); } prog_beg_glob_decl instructions { parser->endproc(0); } dev_procedures KW_ENDP ;

    number:               integer_number
                          | TOK_DOUBLE
                          {
                             $$ = new var;
                             $$->type = KW_REEL;
                             $$->cl = var::LITTERAL;
                             $$->real = $<int_val>1;
                          };
    words:
                          %empty
                          | words word
                          ;

    %type <type> word;
    %printer { fprintf (yyo, "%s", word_string ($$)); } <type>;
    word:
                          %?{ boom(1); }
                          | "hello"  { $$ = hello; }
                          | "bye"  { $$ = bye; }
                          ;

    foo:                  { $$ = 0 }
                          | number { $$ = $1 | $2; }
                          | hello { $$ = $1 | $3; } // without a comma

    hello:
                          gram1 { $$ = "hi" };
                          | gram2
                          ;;

    %%

    #include <stdio.h>

    int main(void)
    {
      puts("Hello, World!");
      return 0;
    }

    // ALERT NOTE