Initial Commit

.svn/pristine/bd/bd2a1cecfb9e466eb391659f9ff17f185f85d6e3.svn-base

@@ -0,0 +1,84 @@
+
+//  (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
+//  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_NOTHROW_ASSIGN_HPP_INCLUDED
+#define BOOST_TT_HAS_NOTHROW_ASSIGN_HPP_INCLUDED
+
+#include <cstddef> // size_t
+#include <boost/type_traits/integral_constant.hpp>
+#include <boost/type_traits/intrinsics.hpp>
+
+#if !defined(BOOST_HAS_NOTHROW_ASSIGN) || defined(BOOST_MSVC) || defined(BOOST_INTEL)
+#include <boost/type_traits/has_trivial_assign.hpp>
+#if !defined(BOOST_NO_CXX11_NOEXCEPT) && !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
+#include <boost/type_traits/declval.hpp>
+#include <boost/type_traits/is_const.hpp>
+#include <boost/type_traits/is_volatile.hpp>
+#include <boost/type_traits/is_reference.hpp>
+#include <boost/type_traits/is_assignable.hpp>
+#include <boost/type_traits/add_reference.hpp>
+#include <boost/type_traits/remove_reference.hpp>
+#endif
+#endif
+#if defined(__GNUC__) || defined(__SUNPRO_CC) || defined(__clang__)
+#include <boost/type_traits/is_const.hpp>
+#include <boost/type_traits/is_volatile.hpp>
+#include <boost/type_traits/is_assignable.hpp>
+#include <boost/type_traits/is_array.hpp>
+#ifdef BOOST_INTEL
+#include <boost/type_traits/is_pod.hpp>
+#endif
+#endif
+
+namespace boost {
+
+#if !defined(BOOST_HAS_NOTHROW_ASSIGN) && !defined(BOOST_NO_CXX11_NOEXCEPT) && !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
+
+   namespace detail
+   {
+      template <class T, bool b1, bool b2> struct has_nothrow_assign_imp{ static const bool value = false; };
+      template <class T>          struct has_nothrow_assign_imp<T, false, true>{ static const bool value = noexcept(boost::declval<typename add_reference<T>::type>() = boost::declval<typename add_reference<T const>::type>()); };
+      template <class T, std::size_t N> struct has_nothrow_assign_imp<T[N], false, true>{ static const bool value = has_nothrow_assign_imp<T, false, true>::value; };
+      template <class T>          struct has_nothrow_assign_imp<T[], false, true>{ static const bool value = has_nothrow_assign_imp<T, false, true>::value; };
+   }
+
+#endif
+
+   template <class T>
+   struct has_nothrow_assign : public integral_constant < bool,
+#ifndef BOOST_HAS_NOTHROW_ASSIGN
+#if !defined(BOOST_NO_CXX11_NOEXCEPT) && !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
+      // Portable C++11 version:
+      detail::has_nothrow_assign_imp<T, 
+      (is_const<typename remove_reference<T>::type>::value || is_volatile<typename remove_reference<T>::type>::value || is_reference<T>::value), 
+      is_assignable<typename add_reference<T>::type, typename add_reference<const T>::type>::value
+      >::value
+#else
+      ::boost::has_trivial_assign<T>::value
+#endif
+#else
+      BOOST_HAS_NOTHROW_ASSIGN(T)
+#endif
+   > {};
+
+template <class T, std::size_t N> struct has_nothrow_assign <T[N]> : public has_nothrow_assign<T> {};
+template <> struct has_nothrow_assign<void> : public false_type{};
+template <class T> struct has_nothrow_assign<T volatile> : public false_type{};
+template <class T> struct has_nothrow_assign<T&> : public false_type{};
+#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
+template <class T> struct has_nothrow_assign<T&&> : public false_type{};
+#endif
+#ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
+template <> struct has_nothrow_assign<void const> : public false_type{};
+template <> struct has_nothrow_assign<void const volatile> : public false_type{};
+template <> struct has_nothrow_assign<void volatile> : public false_type{};
+#endif
+
+} // namespace boost
+
+#endif // BOOST_TT_HAS_NOTHROW_ASSIGN_HPP_INCLUDED