From: Carlos <angus@...>
Date: 2004-02-28T23:00:15+09:00
Subject: Re: [RACC] Multiple entry points?

>>program: PROGRAM name '{' statements '}' { ... }
>>  ;
>>
>>statements: statement { ... }
>>          | statements statement { ... }
>>  ;
>>
>>statement: ...
>>
>>and I want to parse a single statement. How I can tell the parser to
>>start at 'statement' and return?
> 
> 
> Use dummy token.
> 
>   targets: PARSE_PROGRAM program        /* PARSE_PROGRAM is a dummy token */
>          | PARSE_STATEMENT statement    /* PARSE_STATEMENT is a dummy token */
>          ;
> 
>   program: ....
> 
>   statement: ....
> 
> When you want to parse "program", a lexer returns PARSE_PROGRAM at first.
> When you want to parse "statement", a lexer returns PARSE_STATEMENT at first.

A simple and clever solution! Thank you very much!