add boost on mac

macx64/include/boost/hof/unpack_sequence.hpp

@@ -0,0 +1,71 @@
+/*=============================================================================
+    Copyright (c) 2016 Paul Fultz II
+    unpack_sequence.hpp
+    Distributed under the Boost Software License, Version 1.0. (See accompanying
+    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+==============================================================================*/
+
+#ifndef BOOST_HOF_GUARD_UNPACK_SEQUENCE_HPP
+#define BOOST_HOF_GUARD_UNPACK_SEQUENCE_HPP
+
+/// unpack_sequence
+/// ===============
+/// 
+/// How to unpack a sequence can be defined by specializing `unpack_sequence`.
+/// By default, `std::tuple` is already specialized. To implement this, one
+/// needs to provide a static `apply` function which will unpack the sequence
+/// to the parameters of the function.
+/// 
+/// Synopsis
+/// --------
+/// 
+///     template<class Sequence, class=void>
+///     struct unpack_sequence;
+/// 
+/// Example
+/// -------
+/// 
+///     #include <boost/hof.hpp>
+///     #include <cassert>
+/// 
+///     struct my_sequence
+///     {
+///         int x;
+///         int y;
+///     };
+///     
+///     namespace boost { namespace hof {
+///         template<>
+///         struct unpack_sequence<my_sequence>
+///         {
+///             template<class F, class Sequence>
+///             constexpr static auto apply(F&& f, Sequence&& s) BOOST_HOF_RETURNS
+///             (
+///                 f(s.x, s.y)
+///             );
+///         };
+///     }} // namespace boost::hof
+/// 
+///     int main() {
+///     }
+/// 
+/// See Also
+/// --------
+/// 
+/// * [unpack](unpack)
+/// * [is_unpackable](is_unpackable)
+/// 
+
+#include <boost/hof/config.hpp>
+
+namespace boost { namespace hof {
+
+template<class Sequence, class=void>
+struct unpack_sequence
+{
+    typedef void not_unpackable;
+};
+
+}} // namespace boost::hof
+
+#endif