Re: [boost] [typeof] native implementation for msvc 8.0

From: Peder Holt (peder.holt_at_[hidden])
Date: 2006-12-23 04:30:02

2006/12/23, Steven Watanabe <steven_at_[hidden]>:
> AMDG
>
> The following hack works with msvc 8.0
> It appears that using another specialization
> of msvc_extract_type tricks the compiler's filter.

Wow! Great job!
This passed all our tests, so I added it to HEAD.
I wonder if other compilers (e.g. Borland) can be tricked in the same way...

Regards
Peder

>
> #elif BOOST_WORKAROUND(BOOST_MSVC,==1400)
>         struct msvc_extract_type_default_param {};
>
>         template<typename ID, typename T = msvc_extract_type_default_param>
>         struct msvc_extract_type;
>
>         template<typename ID>
>         struct msvc_extract_type<ID, msvc_extract_type_default_param> {
>             template<bool>
>             struct id2type_impl;
>
>             typedef id2type_impl<true> id2type;
>         };
>
>         template<typename ID, typename T>
>         struct msvc_extract_type : msvc_extract_type<ID,
> msvc_extract_type_default_param>
>         {
>             template<>
>             struct id2type_impl<true>  //VC8.0 specific bugfeature
>             {
>                 typedef T type;
>             };
>             template<bool>
>             struct id2type_impl;
>
>             typedef id2type_impl<true> id2type;
>         };
>
>         template<typename T, typename ID>
>         struct msvc_register_type : msvc_extract_type<ID, T>
>         {
>         };
> # else ...
>
> In Christ,
> Steven Watanabe
>
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