Re: [boost] library for type erasure

From: Alexander Nasonov (alnsn_at_[hidden])
Date: 2006-08-08 02:48:05

Steven Watanabe wrote:
> AMDG
> 
> Alexander,
> 
>     This method seems to cover everything I can think of that is 
> actually possible:
> 
> struct plus : function<plus, anyT (anyT const&, anyT const&)> {
>     template<class R, class T0, class T1>
>     R entry(const T0& t0, const T1& t1) {
>        return(t0 + t1);
>     }
> }
> 
> template<>
> struct overload<plus, int> {
>     typedef typename transform<
>        integral_types,
>        binary_function<promotion_traits<int, _1>, int, _1>
>     >::type type;
> }
> 
> //other integral types are similar
> 
> template<>
> struct overload<plus, string> {
>     typedef vector<
>        string(const string&, const string&),
>        string(const string&, const char*),
>        string(const char*, const string&)
>     > type;
> };

I don't understand how you iterate over all specializations
of overload template.

-- 
Alexander Nasonov
Project Manager at Akmosoft ( http://www.akmosoft.com )
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