Remove use of `boost::blank`

[K-ballo <kaballo86@…>]

The attached patch replaces uses of boost::blank for boost::mpl::void_ within Fusion begin/end_impl added at rev73854.

[K-ballo <kaballo86@…>]

patch

[K-ballo <kaballo86@…>]

It seems from the SVN logs that SFINAE was intended here. However, under C++11 rules this is no longer a valid case for SFINAE.

[Kohei Takahashi <flast@…>]

Replying to K-ballo <kaballo86@…>:

However, under C++11 rules this is no longer a valid case for SFINAE.

Did you point attached your patch? If so, this ticket can be closed.

Or replacing such implementation with like a following would be good.

template <typename Tag>
struct begin_impl
{
    template <typename Sequence>
    struct apply
        : enable_if<is_segmented<Sequence>,
                    detail::segmented_begin<Sequence> >
    {};
};