On Sun, 20 Dec 2009, Peng Yu wrote:
> I try to run the example on
> http://tldp.org/HOWTO/Lex-YACC-HOWTO-4.html. But I get the following
> error. Could somebody let me know what I am wrong?
>
> $ bison -d example4.y
> example4.y:24.1-8: syntax error, unexpected identifier:
> $ cat example4.y
> %{
> #include <stdio.h>
> #include <string.h>
>
> void yyerror(const char *str)
> {
> fprintf(stderr,"error: %s\n",str);
> }
>
> int yywrap()
> {
> return 1;
> }
>
> main()
> {
> yyparse();
> }
>
> %}
>
> %token NUMBER TOKHEAT STATE TOKTARGET TOKTEMPERATURE
You need this here:
%%
> commands: /* empty */
> | commands command
> ;
>
> command:
> heat_switch
> |
> target_set
> ;
>
> heat_switch:
> TOKHEAT STATE
> {
> printf("\tHeat turned on or off\n");
> }
> ;
>
> target_set:
> TOKTARGET TOKTEMPERATURE NUMBER
> {
> printf("\tTemperature set\n");
> }
> ;
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