| |
| // (C) Copyright John Maddock 2015. |
| // Use, modification and distribution are subject to the Boost Software License, |
| // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt). |
| // |
| // See http://www.boost.org/libs/type_traits for most recent version including documentation. |
| |
| #ifndef BOOST_TT_IS_DESTRUCTIBLE_HPP_INCLUDED |
| #define BOOST_TT_IS_DESTRUCTIBLE_HPP_INCLUDED |
| |
| #include <cstddef> // size_t |
| #include <boost/type_traits/integral_constant.hpp> |
| #include <boost/detail/workaround.hpp> |
| |
| #if !defined(BOOST_NO_CXX11_DECLTYPE) && !BOOST_WORKAROUND(BOOST_MSVC, < 1800) |
| |
| #include <boost/type_traits/detail/yes_no_type.hpp> |
| #include <boost/type_traits/declval.hpp> |
| |
| namespace boost{ |
| |
| namespace detail{ |
| |
| struct is_destructible_imp |
| { |
| template<typename T, typename = decltype(boost::declval<T&>().~T())> |
| static boost::type_traits::yes_type test(int); |
| template<typename> |
| static boost::type_traits::no_type test(...); |
| }; |
| |
| } |
| |
| template <class T> struct is_destructible : public integral_constant<bool, sizeof(detail::is_destructible_imp::test<T>(0)) == sizeof(boost::type_traits::yes_type)>{}; |
| |
| #else |
| |
| #include <boost/type_traits/is_pod.hpp> |
| #include <boost/type_traits/is_class.hpp> |
| |
| namespace boost{ |
| |
| // We don't know how to implement this: |
| template <class T> struct is_destructible : public integral_constant<bool, is_pod<T>::value || is_class<T>::value>{}; |
| #endif |
| |
| template <> struct is_destructible<void> : public false_type{}; |
| template <> struct is_destructible<void const> : public false_type{}; |
| template <> struct is_destructible<void volatile> : public false_type{}; |
| template <> struct is_destructible<void const volatile> : public false_type{}; |
| template <class T> struct is_destructible<T&> : public is_destructible<T>{}; |
| #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES |
| template <class T> struct is_destructible<T&&> : public is_destructible<T>{}; |
| #endif |
| template <class T, std::size_t N> struct is_destructible<T[N]> : public is_destructible<T>{}; |
| template <class T> struct is_destructible<T[]> : public is_destructible<T>{}; |
| |
| } // namespace boost |
| |
| #endif // BOOST_TT_IS_DESTRUCTIBLE_HPP_INCLUDED |