Re: Actions for Javas class_declaration

[Hans Aberg]

On 20 Nov 2008, at 09:05, Andreas Leppert wrote:

> I've seen this which stands for a Java Class Declaration:
>
> class_declaration:
> modifiers CLASS_TK identifier super interfaces
>         { create_class ($1, $3, $4, $5); }
> class_body
>         {;}
> | CLASS_TK identifier super interfaces
>         { create_class (0, $2, $3, $4); }
> class_body
>         {;}
> ...
>
>
> I have problems to understand the semantic action {;}. Does it mean  
> "do
> nothing" ? Why just not leave it blank?

It depends on how the Java parser is implemented. The C/C++ parsers  
implement a 'switch' statement, which must have ";", but inserts one,  
so it isn't needed. Thus, "{}" or nothing works fine. Check if it  
works in the Java parser (for example, look into the code that Bison  
writes), and if not, report it to Bug-Bison.

  Hans