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+
+//  (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
+//  (C) Copyright Eric Friedman 2002-2003.
+//  (C) Copyright Antony Polukhin 2013.
+//  Use, modification and distribution are subject to 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).
+//
+//  See http://www.boost.org/libs/type_traits for most recent version including documentation.
+
+#ifndef BOOST_TT_HAS_TRIVIAL_MOVE_ASSIGN_HPP_INCLUDED
+#define BOOST_TT_HAS_TRIVIAL_MOVE_ASSIGN_HPP_INCLUDED
+
+#include <cstddef> // size_t
+#include <boost/type_traits/intrinsics.hpp>
+#include <boost/type_traits/integral_constant.hpp>
+
+#if !defined(BOOST_HAS_TRIVIAL_MOVE_ASSIGN) || defined(BOOST_MSVC) || defined(BOOST_INTEL)
+#include <boost/type_traits/is_pod.hpp>
+#include <boost/type_traits/is_const.hpp>
+#include <boost/type_traits/is_volatile.hpp>
+#ifdef BOOST_MSVC
+#include <boost/type_traits/is_reference.hpp>
+#endif
+#endif
+
+#if defined(__GNUC__) || defined(__clang)
+#include <boost/type_traits/is_assignable.hpp>
+#include <boost/type_traits/is_volatile.hpp>
+#endif
+
+#ifdef __SUNPRO_CC
+#include <boost/type_traits/is_assignable.hpp>
+#include <boost/type_traits/remove_const.hpp>
+#if __cplusplus >= 201103
+#define SOLARIS_EXTRA_CHECK && is_assignable<typename remove_const<T>::type&, typename remove_const<T>::type&&>::value
+#endif
+#endif
+
+#ifndef SOLARIS_EXTRA_CHECK
+#define SOLARIS_EXTRA_CHECK
+#endif
+
+namespace boost{
+
+template <typename T>
+struct has_trivial_move_assign : public integral_constant<bool,
+#ifdef BOOST_HAS_TRIVIAL_MOVE_ASSIGN
+   BOOST_HAS_TRIVIAL_MOVE_ASSIGN(T)
+#else
+   ::boost::is_pod<T>::value && !::boost::is_const<T>::value && !::boost::is_volatile<T>::value SOLARIS_EXTRA_CHECK
+#endif
+   > {};
+
+template <> struct has_trivial_move_assign<void> : public false_type{};
+#ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
+template <> struct has_trivial_move_assign<void const> : public false_type{};
+template <> struct has_trivial_move_assign<void const volatile> : public false_type{};
+template <> struct has_trivial_move_assign<void volatile> : public false_type{};
+#endif
+template <class T> struct has_trivial_move_assign<T&> : public false_type{};
+#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
+template <class T> struct has_trivial_move_assign<T&&> : public false_type{};
+#endif
+// Array types are not assignable:
+template <class T, std::size_t N> struct has_trivial_move_assign<T[N]> : public false_type{};
+template <class T> struct has_trivial_move_assign<T[]> : public false_type{};
+
+} // namespace boost
+
+#undef SOLARIS_EXTRA_CHECK
+
+#endif // BOOST_TT_HAS_TRIVIAL_MOVE_ASSIGN_HPP_INCLUDED