1 | |
---|---|
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 <boost/type_traits/intrinsics.hpp> |
13 | #include <boost/type_traits/is_pod.hpp> |
14 | #include <boost/type_traits/is_reference.hpp> |
15 | |
16 | #if (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ >= 409)) || defined(BOOST_CLANG) || (defined(__SUNPRO_CC) && defined(BOOST_HAS_TRIVIAL_COPY)) |
17 | #include <boost/type_traits/is_copy_constructible.hpp> |
18 | #define BOOST_TT_TRIVIAL_CONSTRUCT_FIX && is_copy_constructible<T>::value |
19 | #else |
20 | #define BOOST_TT_TRIVIAL_CONSTRUCT_FIX |
21 | #endif |
22 | |
23 | #ifdef BOOST_INTEL |
24 | #include <boost/type_traits/add_const.hpp> |
25 | #include <boost/type_traits/add_lvalue_reference.hpp> |
26 | #endif |
27 | |
28 | namespace boost { |
29 | |
30 | template <typename T> struct has_trivial_copy |
31 | : public integral_constant<bool, |
32 | #ifdef BOOST_HAS_TRIVIAL_COPY |
33 | BOOST_HAS_TRIVIAL_COPY(T) BOOST_TT_TRIVIAL_CONSTRUCT_FIX |
34 | #else |
35 | ::boost::is_pod<T>::value |
36 | #endif |
37 | >{}; |
38 | // Arrays are not explicitly copyable: |
39 | template <typename T, std::size_t N> struct has_trivial_copy<T[N]> : public false_type{}; |
40 | template <typename T> struct has_trivial_copy<T[]> : public false_type{}; |
41 | // Are volatile types ever trivial? We don't really know, so assume not: |
42 | template <typename T> struct has_trivial_copy<T volatile> : public false_type{}; |
43 | |
44 | template <> struct has_trivial_copy<void> : public false_type{}; |
45 | #ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS |
46 | template <> struct has_trivial_copy<void const> : public false_type{}; |
47 | template <> struct has_trivial_copy<void volatile> : public false_type{}; |
48 | template <> struct has_trivial_copy<void const volatile> : public false_type{}; |
49 | #endif |
50 | |
51 | template <class T> struct has_trivial_copy<T&> : public false_type{}; |
52 | #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) |
53 | template <class T> struct has_trivial_copy<T&&> : public false_type{}; |
54 | #endif |
55 | |
56 | template <class T> struct has_trivial_copy_constructor : public has_trivial_copy<T>{}; |
57 | |
58 | #undef BOOST_TT_TRIVIAL_CONSTRUCT_FIX |
59 | |
60 | } // namespace boost |
61 | |
62 | #endif // BOOST_TT_HAS_TRIVIAL_COPY_HPP_INCLUDED |
63 |