[Boost-users] Re: enable_if question

Howard Hinnant <hinnant@twcny.rr.com> writes:

And you might prefer to place the condition on the return type for readability purposes:

template <class T> typename enable_if < condition1 && condition2, T

...

::type foo(T t);

Ahem. That would be: template <class T> typename enable_if < mpl::and_<condition1, condition2>, ^^^^^^^^^^ T

::type foo(T t);

or, if you insist, the usually-less-efficient template <class T> typename enable_if_c ^^ < condition1::value && condition2::value, T

::type foo(T t);

-- Dave Abrahams Boost Consulting http://www.boost-consulting.com