| |
| // (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_COPY_HPP_INCLUDED |
| #define BOOST_TT_HAS_TRIVIAL_COPY_HPP_INCLUDED |
| |
| #include <cstddef> // size_t |
| #include <boost/type_traits/intrinsics.hpp> |
| #include <boost/type_traits/is_pod.hpp> |
| #include <boost/type_traits/is_reference.hpp> |
| |
| #if (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 409)) || defined(BOOST_CLANG) || (defined(__SUNPRO_CC) && defined(BOOST_HAS_TRIVIAL_COPY)) |
| #include <boost/type_traits/is_copy_constructible.hpp> |
| #define BOOST_TT_TRIVIAL_CONSTRUCT_FIX && is_copy_constructible<T>::value |
| #else |
| #define BOOST_TT_TRIVIAL_CONSTRUCT_FIX |
| #endif |
| |
| #ifdef BOOST_INTEL |
| #include <boost/type_traits/add_const.hpp> |
| #include <boost/type_traits/add_lvalue_reference.hpp> |
| #endif |
| |
| namespace boost { |
| |
| template <typename T> struct has_trivial_copy |
| : public integral_constant<bool, |
| #ifdef BOOST_HAS_TRIVIAL_COPY |
| BOOST_HAS_TRIVIAL_COPY(T) BOOST_TT_TRIVIAL_CONSTRUCT_FIX |
| #else |
| ::boost::is_pod<T>::value |
| #endif |
| >{}; |
| // Arrays are not explicitly copyable: |
| template <typename T, std::size_t N> struct has_trivial_copy<T[N]> : public false_type{}; |
| template <typename T> struct has_trivial_copy<T[]> : public false_type{}; |
| // Are volatile types ever trivial? We don't really know, so assume not: |
| template <typename T> struct has_trivial_copy<T volatile> : public false_type{}; |
| |
| template <> struct has_trivial_copy<void> : public false_type{}; |
| #ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS |
| template <> struct has_trivial_copy<void const> : public false_type{}; |
| template <> struct has_trivial_copy<void volatile> : public false_type{}; |
| template <> struct has_trivial_copy<void const volatile> : public false_type{}; |
| #endif |
| |
| template <class T> struct has_trivial_copy<T&> : public false_type{}; |
| #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) |
| template <class T> struct has_trivial_copy<T&&> : public false_type{}; |
| #endif |
| |
| template <class T> struct has_trivial_copy_constructor : public has_trivial_copy<T>{}; |
| |
| #undef BOOST_TT_TRIVIAL_CONSTRUCT_FIX |
| |
| } // namespace boost |
| |
| #endif // BOOST_TT_HAS_TRIVIAL_COPY_HPP_INCLUDED |