#### register_buffers (2 of 4 overloads)

Register buffers with an execution context.

    template<
        typename Executor,
        typename MutableBufferSequence,
        typename Allocator>
    buffer_registration< MutableBufferSequence, Allocator > register_buffers(
        const Executor & ex,
        const MutableBufferSequence & buffer_sequence,
        const Allocator & alloc,
        typename constraint< is_executor< Executor >::value||execution::is_executor< Executor >::value >::type  = 0);