RE: [boost] Named Pairs

From: Rozental, Gennadiy (gennadiy.rozental_at_[hidden])
Date: 2003-01-23 15:37:19

First of all there are several glitches here:

> template <typename _T1, int _Name1, typename _T2, int _Name2>
> class named_pair{
>   public:
>   template <int _Name> 
>   class var{};
>   
     template<>?
>   class var<_Name1>{

 I am not sure that you allowed to use template parameter for defining
partial specialization.
>   public:
>     _T1 value;
>   }

;?

>   
     template<>?
>   class var<_Name2>{
public:
>     _T2 value;
>   }

;?

> };
> 
> enum{  Cash,  Name  };
> 
> void main(int argc, char *argv[]){
>   named_pair<float, Cash, char*, Name> foobar;
> 
>   foobar.var<Cash>.value = 32.2;
>   foobar.var<Name>.value = "Fred";

Even if above class definition is allowed foobar.var<Cash> will be invalud
cause var<Cash> is a type name. So basically what you are doing is unusable.

> }

Look on MPL example for inherit_linear. It may have what you need.

Gennadiy.