add boost on mac

macx64/include/boost/hof/detail/constexpr_deduce.hpp

@@ -0,0 +1,74 @@
+/*=============================================================================
+    Copyright (c) 2015 Paul Fultz II
+    constexpr_deduce.h
+    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_CONSTEXPR_DEDUCE_H
+#define BOOST_HOF_GUARD_FUNCTION_CONSTEXPR_DEDUCE_H
+
+#include <boost/hof/config.hpp>
+
+#define BOOST_HOF_CONST_FOLD(x) (__builtin_constant_p(x) ? (x) : (x))
+
+#ifndef BOOST_HOF_HAS_CONST_FOLD
+#if defined(__GNUC__) && !defined (__clang__) && __GNUC__ == 4 && __GNUC_MINOR__ < 7
+#define BOOST_HOF_HAS_CONST_FOLD 0
+#elif defined(__clang__) || defined (__GNUC__)
+#define BOOST_HOF_HAS_CONST_FOLD 1
+#else
+#define BOOST_HOF_HAS_CONST_FOLD 0
+#endif
+#endif
+
+
+namespace boost { namespace hof {
+
+namespace detail {
+
+struct constexpr_deduce
+{
+    constexpr constexpr_deduce()
+    {}
+    template<class F>
+    constexpr operator F() const
+    {
+        return F();
+    }
+};
+
+template<class T>
+struct constexpr_deduce_unique
+{
+    constexpr constexpr_deduce_unique()
+    {}
+#if BOOST_HOF_HAS_CONST_FOLD
+    template<class F>
+    constexpr operator const F&() const
+    {
+        static_assert(BOOST_HOF_IS_EMPTY(F), "Function or lambda expression must be empty");
+        return BOOST_HOF_CONST_FOLD(reinterpret_cast<const F&>(static_const_var<T>()));
+    }
+#else
+    template<class F>
+    constexpr operator F() const
+    {
+        // static_assert(std::is_default_constructible<F>::value, "Function not default constructible");
+        return F();
+    }
+#endif
+};
+
+}}} // namespace boost::hof
+
+#define BOOST_HOF_DETAIL_CONSTEXPR_DEDUCE true ? boost::hof::detail::constexpr_deduce() :
+#define BOOST_HOF_DETAIL_CONSTEXPR_DEDUCE_UNIQUE(T) true ? boost::hof::detail::constexpr_deduce_unique<T>() :
+
+#ifdef _MSC_VER
+#define BOOST_HOF_DETAIL_MSVC_CONSTEXPR_DEDUCE BOOST_HOF_DETAIL_CONSTEXPR_DEDUCE
+#else
+#define BOOST_HOF_DETAIL_MSVC_CONSTEXPR_DEDUCE
+#endif
+
+#endif