Jaakko Jarvi <[EMAIL PROTECTED]> writes:
> Where we've used enable_if, it has been very common that the condition
> is not just a single traits lookup, but rather a logical expression,
> e.g.:
>
> template <class T, class U>
> typename enable_if<is_matrix<T>::value && is_vector<U>::value,...>::type
> operator*(const T& t, const U& u);
>
> So definitely, this version of enable_if is needed.
really?
template <class T, class U>
typename enable_if<mpl::and<is_matrix<T>, is_vector<U> >,...>::type
operator*(const T& t, const U& u);
looks better to me.
--
Dave Abrahams
Boost Consulting
www.boost-consulting.com
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