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1 | |
2 | // (C) Copyright John Maddock 2015. | |
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_IS_DESTRUCTIBLE_HPP_INCLUDED | |
10 | #define BOOST_TT_IS_DESTRUCTIBLE_HPP_INCLUDED | |
11 | ||
12 | #include <cstddef> // size_t | |
13 | #include <boost/type_traits/integral_constant.hpp> | |
14 | #include <boost/detail/workaround.hpp> | |
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15 | #include <boost/type_traits/is_complete.hpp> |
16 | #include <boost/static_assert.hpp> | |
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17 | |
18 | #if !defined(BOOST_NO_CXX11_DECLTYPE) && !BOOST_WORKAROUND(BOOST_MSVC, < 1800) | |
19 | ||
20 | #include <boost/type_traits/detail/yes_no_type.hpp> | |
21 | #include <boost/type_traits/declval.hpp> | |
22 | ||
23 | namespace boost{ | |
24 | ||
25 | namespace detail{ | |
26 | ||
27 | struct is_destructible_imp | |
28 | { | |
29 | template<typename T, typename = decltype(boost::declval<T&>().~T())> | |
30 | static boost::type_traits::yes_type test(int); | |
31 | template<typename> | |
32 | static boost::type_traits::no_type test(...); | |
33 | }; | |
34 | ||
35 | } | |
36 | ||
92f5a8d4 | 37 | template <class T> struct is_destructible : public integral_constant<bool, sizeof(boost::detail::is_destructible_imp::test<T>(0)) == sizeof(boost::type_traits::yes_type)> |
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38 | { |
39 | BOOST_STATIC_ASSERT_MSG(boost::is_complete<T>::value, "Arguments to is_destructible must be complete types"); | |
40 | }; | |
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41 | |
42 | #else | |
43 | ||
44 | #include <boost/type_traits/is_pod.hpp> | |
45 | #include <boost/type_traits/is_class.hpp> | |
46 | ||
47 | namespace boost{ | |
48 | ||
49 | // We don't know how to implement this: | |
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50 | template <class T> struct is_destructible : public integral_constant<bool, is_pod<T>::value || is_class<T>::value> |
51 | { | |
52 | BOOST_STATIC_ASSERT_MSG(boost::is_complete<T>::value, "Arguments to is_destructible must be complete types"); | |
53 | }; | |
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54 | #endif |
55 | ||
56 | template <> struct is_destructible<void> : public false_type{}; | |
57 | template <> struct is_destructible<void const> : public false_type{}; | |
58 | template <> struct is_destructible<void volatile> : public false_type{}; | |
59 | template <> struct is_destructible<void const volatile> : public false_type{}; | |
60 | template <class T> struct is_destructible<T&> : public is_destructible<T>{}; | |
61 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES | |
62 | template <class T> struct is_destructible<T&&> : public is_destructible<T>{}; | |
63 | #endif | |
64 | template <class T, std::size_t N> struct is_destructible<T[N]> : public is_destructible<T>{}; | |
65 | template <class T> struct is_destructible<T[]> : public is_destructible<T>{}; | |
66 | ||
67 | } // namespace boost | |
68 | ||
69 | #endif // BOOST_TT_IS_DESTRUCTIBLE_HPP_INCLUDED |