[boost] Re: Review request: enable_if

From: Markus Werle (numerical.simulation_at_[hidden])
Date: 2003-07-14 03:00:58

Thomas Witt wrote:

> 3. To me the disable templates don't add any value. They are just
> duplicating the amount of code without any real benefit. I know this is
> a matter of taste, it's just that I would prefer a minimal interface.

Following David's arguments towards mpl compatibility and removing
direct use of && || etc.
I'd prefer 

template <class T, class U>
typename disable_if<mpl::and<is_matrix<T>, is_vector<U> >,...>::type
operator*(const T& t, const U& u);      

and feel uncomfortable about adding another "not", just because 
_my_ code is ugly enough already

template <class T, class U>
typename enable_if<mpl::not<mpl::and<is_matrix<T>, 
                                     is_vector<U> >,...> >::type
operator*(const T& t, const U& u); 

So please keep disable_if.

Markus

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