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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 |