add boost on mac

macx64/include/boost/hof/function_param_limit.hpp

@@ -0,0 +1,57 @@
+/*=============================================================================
+    Copyright (c) 2016 Paul Fultz II
+    function_param_limit.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_FUNCTION_PARAM_LIMIT_HPP
+#define BOOST_HOF_GUARD_FUNCTION_PARAM_LIMIT_HPP
+
+/// function_param_limit
+/// ====================
+/// 
+/// Description
+/// -----------
+/// 
+/// The `function_param_limit` metafunction retrieves the maximum number of
+/// parameters for a function. For function pointers it returns the number of
+/// parameters. Everything else, it returns `SIZE_MAX`, but this can be
+/// changed by annotating the function with the [`limit`](limit) decorator.
+/// 
+/// This is a type trait that inherits from `std::integral_constant`.
+/// 
+/// Synopsis
+/// --------
+/// 
+///     template<class F>
+///     struct function_param_limit
+///     : std::integral_constant<std::size_t, ...>
+///     {};
+/// 
+/// See Also
+/// --------
+/// 
+/// * [Partial function evaluation](<Partial function evaluation>)
+/// * [limit](limit)
+/// 
+
+#include <boost/hof/detail/holder.hpp>
+#include <type_traits>
+#include <cstdint>
+
+namespace boost { namespace hof {
+
+template<class F, class=void>
+struct function_param_limit
+: std::integral_constant<std::size_t, SIZE_MAX>
+{};
+
+template<class F>
+struct function_param_limit<F, typename detail::holder<typename F::fit_function_param_limit>::type>
+: F::fit_function_param_limit
+{};
+
+}} // namespace boost::hof
+
+#endif