64 lines
2.4 KiB
Plaintext
64 lines
2.4 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_COPY_HPP_INCLUDED
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#define BOOST_TT_HAS_TRIVIAL_COPY_HPP_INCLUDED
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#include <cstddef> // size_t
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#include <boost/type_traits/intrinsics.hpp>
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#include <boost/type_traits/is_pod.hpp>
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#include <boost/type_traits/is_reference.hpp>
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#if (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 409)) || defined(BOOST_CLANG) || (defined(__SUNPRO_CC) && defined(BOOST_HAS_TRIVIAL_COPY))
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#include <boost/type_traits/is_copy_constructible.hpp>
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#define BOOST_TT_TRIVIAL_CONSTRUCT_FIX && is_copy_constructible<T>::value
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#else
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#define BOOST_TT_TRIVIAL_CONSTRUCT_FIX
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#endif
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#ifdef BOOST_INTEL
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#include <boost/type_traits/add_const.hpp>
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#include <boost/type_traits/add_lvalue_reference.hpp>
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#endif
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namespace boost {
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template <typename T> struct has_trivial_copy
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: public integral_constant<bool,
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#ifdef BOOST_HAS_TRIVIAL_COPY
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BOOST_HAS_TRIVIAL_COPY(T) BOOST_TT_TRIVIAL_CONSTRUCT_FIX
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#else
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::boost::is_pod<T>::value
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#endif
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>{};
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// Arrays are not explicitly copyable:
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template <typename T, std::size_t N> struct has_trivial_copy<T[N]> : public false_type{};
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template <typename T> struct has_trivial_copy<T[]> : public false_type{};
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// Are volatile types ever trivial? We don't really know, so assume not:
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template <typename T> struct has_trivial_copy<T volatile> : public false_type{};
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template <> struct has_trivial_copy<void> : public false_type{};
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#ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
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template <> struct has_trivial_copy<void const> : public false_type{};
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template <> struct has_trivial_copy<void volatile> : public false_type{};
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template <> struct has_trivial_copy<void const volatile> : public false_type{};
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#endif
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template <class T> struct has_trivial_copy<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_copy<T&&> : public false_type{};
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#endif
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template <class T> struct has_trivial_copy_constructor : public has_trivial_copy<T>{};
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#undef BOOST_TT_TRIVIAL_CONSTRUCT_FIX
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} // namespace boost
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#endif // BOOST_TT_HAS_TRIVIAL_COPY_HPP_INCLUDED
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