| 1 | |
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| 2 | // (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000. |
| 3 | // Use, modification and distribution are subject to the Boost Software License, |
| 4 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
| 5 | // http://www.boost.org/LICENSE_1_0.txt). |
| 6 | // |
| 7 | // See http://www.boost.org/libs/type_traits for most recent version including documentation. |
| 8 | |
| 9 | #ifndef BOOST_TT_HAS_TRIVIAL_COPY_HPP_INCLUDED |
| 10 | #define BOOST_TT_HAS_TRIVIAL_COPY_HPP_INCLUDED |
| 11 | |
| 12 | #include <cstddef> // size_t |
| 13 | #include <boost/type_traits/intrinsics.hpp> |
| 14 | #include <boost/type_traits/is_pod.hpp> |
| 15 | #include <boost/type_traits/is_reference.hpp> |
| 16 | |
| 17 | #if (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 409)) || defined(BOOST_CLANG) || (defined(__SUNPRO_CC) && defined(BOOST_HAS_TRIVIAL_COPY)) |
| 18 | #include <boost/type_traits/is_copy_constructible.hpp> |
| 19 | #define BOOST_TT_TRIVIAL_CONSTRUCT_FIX && is_copy_constructible<T>::value |
| 20 | #else |
| 21 | #define BOOST_TT_TRIVIAL_CONSTRUCT_FIX |
| 22 | #endif |
| 23 | |
| 24 | #ifdef BOOST_INTEL |
| 25 | #include <boost/type_traits/add_const.hpp> |
| 26 | #include <boost/type_traits/add_lvalue_reference.hpp> |
| 27 | #endif |
| 28 | |
| 29 | namespace boost { |
| 30 | |
| 31 | template <typename T> struct has_trivial_copy |
| 32 | : public integral_constant<bool, |
| 33 | #ifdef BOOST_HAS_TRIVIAL_COPY |
| 34 | BOOST_HAS_TRIVIAL_COPY(T) BOOST_TT_TRIVIAL_CONSTRUCT_FIX |
| 35 | #else |
| 36 | ::boost::is_pod<T>::value |
| 37 | #endif |
| 38 | >{}; |
| 39 | // Arrays are not explicitly copyable: |
| 40 | template <typename T, std::size_t N> struct has_trivial_copy<T[N]> : public false_type{}; |
| 41 | template <typename T> struct has_trivial_copy<T[]> : public false_type{}; |
| 42 | // Are volatile types ever trivial? We don't really know, so assume not: |
| 43 | template <typename T> struct has_trivial_copy<T volatile> : public false_type{}; |
| 44 | |
| 45 | template <> struct has_trivial_copy<void> : public false_type{}; |
| 46 | #ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS |
| 47 | template <> struct has_trivial_copy<void const> : public false_type{}; |
| 48 | template <> struct has_trivial_copy<void volatile> : public false_type{}; |
| 49 | template <> struct has_trivial_copy<void const volatile> : public false_type{}; |
| 50 | #endif |
| 51 | |
| 52 | template <class T> struct has_trivial_copy<T&> : public false_type{}; |
| 53 | #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) |
| 54 | template <class T> struct has_trivial_copy<T&&> : public false_type{}; |
| 55 | #endif |
| 56 | |
| 57 | template <class T> struct has_trivial_copy_constructor : public has_trivial_copy<T>{}; |
| 58 | |
| 59 | #undef BOOST_TT_TRIVIAL_CONSTRUCT_FIX |
| 60 | |
| 61 | } // namespace boost |
| 62 | |
| 63 | #endif // BOOST_TT_HAS_TRIVIAL_COPY_HPP_INCLUDED |
| 64 |