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 <boost/type_traits/integral_constant.hpp>
13#include <boost/detail/workaround.hpp>
14
15#if !defined(BOOST_NO_CXX11_DECLTYPE) && !BOOST_WORKAROUND(BOOST_MSVC, < 1800)
16
17#include <boost/type_traits/detail/yes_no_type.hpp>
18#include <boost/type_traits/declval.hpp>
19
20namespace boost{
21
22 namespace detail{
23
24 struct is_destructible_imp
25 {
26 template<typename T, typename = decltype(boost::declval<T&>().~T())>
27 static boost::type_traits::yes_type test(int);
28 template<typename>
29 static boost::type_traits::no_type test(...);
30 };
31
32 }
33
34 template <class T> struct is_destructible : public integral_constant<bool, sizeof(detail::is_destructible_imp::test<T>(0)) == sizeof(boost::type_traits::yes_type)>{};
35
36#else
37
38#include <boost/type_traits/is_pod.hpp>
39#include <boost/type_traits/is_class.hpp>
40
41namespace boost{
42
43 // We don't know how to implement this:
44 template <class T> struct is_destructible : public integral_constant<bool, is_pod<T>::value || is_class<T>::value>{};
45#endif
46
47 template <> struct is_destructible<void> : public false_type{};
48 template <> struct is_destructible<void const> : public false_type{};
49 template <> struct is_destructible<void volatile> : public false_type{};
50 template <> struct is_destructible<void const volatile> : public false_type{};
51 template <class T> struct is_destructible<T&> : public is_destructible<T>{};
52#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
53 template <class T> struct is_destructible<T&&> : public is_destructible<T>{};
54#endif
55 template <class T, std::size_t N> struct is_destructible<T[N]> : public is_destructible<T>{};
56 template <class T> struct is_destructible<T[]> : public is_destructible<T>{};
57
58} // namespace boost
59
60#endif // BOOST_TT_IS_DESTRUCTIBLE_HPP_INCLUDED
61