53 lines
2.2 KiB
Plaintext
53 lines
2.2 KiB
Plaintext
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// (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
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// Use, modification and distribution are subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt).
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//
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// See http://www.boost.org/libs/type_traits for most recent version including documentation.
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#ifndef BOOST_TT_HAS_TRIVIAL_ASSIGN_HPP_INCLUDED
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#define BOOST_TT_HAS_TRIVIAL_ASSIGN_HPP_INCLUDED
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#include <cstddef> // size_t
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#include <boost/type_traits/detail/config.hpp>
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#include <boost/type_traits/intrinsics.hpp>
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#include <boost/type_traits/integral_constant.hpp>
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#if !defined(BOOST_HAS_TRIVIAL_ASSIGN) || defined(BOOST_MSVC) || defined(__GNUC__) || defined(BOOST_INTEL) || defined(__SUNPRO_CC) || defined(__clang__)
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#include <boost/type_traits/is_pod.hpp>
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#include <boost/type_traits/is_const.hpp>
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#include <boost/type_traits/is_volatile.hpp>
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#include <boost/type_traits/is_assignable.hpp>
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#endif
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namespace boost {
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template <typename T>
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struct has_trivial_assign : public integral_constant < bool,
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#ifdef BOOST_HAS_TRIVIAL_ASSIGN
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BOOST_HAS_TRIVIAL_ASSIGN(T)
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#else
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::boost::is_pod<T>::value && !::boost::is_const<T>::value && !::boost::is_volatile<T>::value
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#endif
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> {};
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template<> struct has_trivial_assign<void> : public false_type{};
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#ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
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template<> struct has_trivial_assign<void const> : public false_type{};
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template<> struct has_trivial_assign<void const volatile> : public false_type{};
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template<> struct has_trivial_assign<void volatile> : public false_type{};
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#endif
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template <class T> struct has_trivial_assign<T volatile> : public false_type{};
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template <class T> struct has_trivial_assign<T&> : public false_type{};
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#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
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template <class T> struct has_trivial_assign<T&&> : public false_type{};
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#endif
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// Arrays are not explictly assignable:
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template <typename T, std::size_t N> struct has_trivial_assign<T[N]> : public false_type{};
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template <typename T> struct has_trivial_assign<T[]> : public false_type{};
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} // namespace boost
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#endif // BOOST_TT_HAS_TRIVIAL_ASSIGN_HPP_INCLUDED
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