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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 <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