Re: %prefix with C++ namespaces

[Hans Aberg]

On 29 Sep 2007, at 04:06, Sebastian Pipping wrote:

> I noticed two things with %prefix when combined
> with a C++ parser that might be bugs:
>
>
> (1) %prefix=abc renames function yylex to "abclex"
>     instead of putting it in namespace abc.

You are right, it should be in a namespace, though I think it might  
have been left so, i order to sync with Flex. I think one might put  
it in a namespace, but have another option, say %lexer-prefix, which  
if present, writes it in the global form.

> (2) Nested namespaces do not work:
>     %prefix=abc::def should give
>
>       namespace abc {
>       namespace def {
>         ..
>       }
>       }
>
>     instead of
>
>       namespace abc::def {
>         ..
>       }
>
>     I guess?

This is due to a bug in the C++ standard, but they seem unlikely to  
fix things like that there :-). So it should probably write nested  
namespaces, or not admitting "::" in the name.

> Is this known and planned to fix?

Don't know; I have cc-ed some Bison developers.

  Hans Aberg