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- // (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>
- #include <boost/type_traits/is_complete.hpp>
- #include <boost/static_assert.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(boost::detail::is_destructible_imp::test<T>(0)) == sizeof(boost::type_traits::yes_type)>
- {
- BOOST_STATIC_ASSERT_MSG(boost::is_complete<T>::value, "Arguments to is_destructible must be complete types");
- };
- #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>
- {
- BOOST_STATIC_ASSERT_MSG(boost::is_complete<T>::value, "Arguments to is_destructible must be complete types");
- };
- #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
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