| |
| // (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_TRIVIAL_ASSIGN_HPP_INCLUDED |
| #define BOOST_TT_HAS_TRIVIAL_ASSIGN_HPP_INCLUDED |
| |
| #include <cstddef> // size_t |
| #include <boost/type_traits/detail/config.hpp> |
| #include <boost/type_traits/intrinsics.hpp> |
| #include <boost/type_traits/integral_constant.hpp> |
| |
| #if !defined(BOOST_HAS_TRIVIAL_ASSIGN) || defined(BOOST_MSVC) || defined(__GNUC__) || defined(BOOST_INTEL) || defined(__SUNPRO_CC) || defined(__clang__) |
| #include <boost/type_traits/is_pod.hpp> |
| #include <boost/type_traits/is_const.hpp> |
| #include <boost/type_traits/is_volatile.hpp> |
| #include <boost/type_traits/is_assignable.hpp> |
| #endif |
| |
| namespace boost { |
| |
| template <typename T> |
| struct has_trivial_assign : public integral_constant < bool, |
| #ifdef BOOST_HAS_TRIVIAL_ASSIGN |
| BOOST_HAS_TRIVIAL_ASSIGN(T) |
| #else |
| ::boost::is_pod<T>::value && !::boost::is_const<T>::value && !::boost::is_volatile<T>::value |
| #endif |
| > {}; |
| |
| template<> struct has_trivial_assign<void> : public false_type{}; |
| #ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS |
| template<> struct has_trivial_assign<void const> : public false_type{}; |
| template<> struct has_trivial_assign<void const volatile> : public false_type{}; |
| template<> struct has_trivial_assign<void volatile> : public false_type{}; |
| #endif |
| template <class T> struct has_trivial_assign<T volatile> : public false_type{}; |
| template <class T> struct has_trivial_assign<T&> : public false_type{}; |
| #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) |
| template <class T> struct has_trivial_assign<T&&> : public false_type{}; |
| #endif |
| // Arrays are not explictly assignable: |
| template <typename T, std::size_t N> struct has_trivial_assign<T[N]> : public false_type{}; |
| template <typename T> struct has_trivial_assign<T[]> : public false_type{}; |
| |
| } // namespace boost |
| |
| #endif // BOOST_TT_HAS_TRIVIAL_ASSIGN_HPP_INCLUDED |