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add C++14 version is_destructible
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bolero-MURAKAMI
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commit
1507d435f9
2 changed files with 123 additions and 4 deletions
118
sprout/type_traits/is_destructible.hpp
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118
sprout/type_traits/is_destructible.hpp
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@ -0,0 +1,118 @@
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/*=============================================================================
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Copyright (c) 2011-2015 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_TYPE_TRAITS_IS_DESTRUCTIBLE_HPP
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#define SPROUT_TYPE_TRAITS_IS_DESTRUCTIBLE_HPP
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#include <utility>
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/type_traits/integral_constant.hpp>
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#include <sprout/type_traits/identity.hpp>
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#include <sprout/type_traits/detail/type_traits_wrapper.hpp>
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namespace sprout {
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//
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// is_destructible
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//
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namespace detail {
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struct is_destructible_helper_1 {
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public:
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template<typename U>
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struct w {
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U u;
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};
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template<
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typename T,
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typename = decltype(std::declval<w<T>&>().~w<T>())
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>
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static sprout::true_type test(int);
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template<typename>
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static sprout::false_type test(...);
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};
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#if defined(_MSC_VER)
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template<typename T, typename Base_ = sprout::identity<decltype(sprout::detail::is_destructible_helper_1::test<T>(0))>::type>
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struct is_destructible_impl_1
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: public Base_
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{};
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#else
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template<typename T>
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struct is_destructible_impl_1
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: public sprout::identity<decltype(sprout::detail::is_destructible_helper_1::test<T>(0))>::type
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{};
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#endif
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struct is_destructible_helper_2 {
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public:
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template<
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typename T,
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typename = decltype(std::declval<T&>().~T())
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>
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static sprout::true_type test(int);
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template<typename>
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static sprout::false_type test(...);
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};
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#if defined(_MSC_VER)
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template<typename T, typename Base_ = sprout::identity<decltype(sprout::detail::is_destructible_helper_2::test<T>(0))>::type>
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struct is_destructible_impl_2
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: public Base_
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{};
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#else
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template<typename T>
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struct is_destructible_impl_2
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: public sprout::identity<decltype(sprout::detail::is_destructible_helper_2::test<T>(0))>::type
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{};
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#endif
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struct is_destructible_helper {
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public:
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template<
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typename T,
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typename = decltype(std::declval<T&>().~T())
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>
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static sprout::true_type test(int);
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template<typename>
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static sprout::false_type test(...);
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};
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#if defined(_MSC_VER)
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template<typename T, typename Base_ = sprout::identity<decltype(sprout::detail::is_destructible_helper::test<T>(0))>::type>
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struct is_destructible_impl_0
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: public Base_
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{};
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#else
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template<typename T>
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struct is_destructible_impl_0
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: public sprout::identity<decltype(sprout::detail::is_destructible_helper::test<T>(0))>::type
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{};
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#endif
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template<
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typename T,
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bool = std::is_void<T>::value || (std::is_array<T>::value && !std::extent<T>::value),
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bool = std::is_reference<T>::value || std::is_function<T>::value
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>
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struct is_destructible_impl;
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template<typename T>
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struct is_destructible_impl<T, false, false>
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: public sprout::detail::is_destructible_impl_0<typename std::remove_all_extents<T>::type>
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{};
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template<typename T>
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struct is_destructible_impl<T, true, false>
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: public sprout::false_type
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{};
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template<typename T>
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struct is_destructible_impl<T, false, true>
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: public sprout::true_type
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{};
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} // namespace detail
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template<typename T>
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struct is_destructible
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: public sprout::detail::is_destructible_impl<T>
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{};
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} // namespace sprout
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#endif // #ifndef SPROUT_TYPE_TRAITS_IS_DESTRUCTIBLE_HPP
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@ -17,6 +17,7 @@
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#include <sprout/type_traits/is_null_pointer.hpp>
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#include <sprout/type_traits/is_signed.hpp>
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#include <sprout/type_traits/is_unsigned.hpp>
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#include <sprout/type_traits/is_destructible.hpp>
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#include <sprout/type_traits/detail/type_traits_wrapper.hpp>
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#if !defined(_LIBCPP_VERSION) || (_LIBCPP_VERSION < 1101)
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# include <sprout/tpp/algorithm/max_element.hpp>
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@ -195,10 +196,10 @@ namespace sprout {
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struct is_move_assignable
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: public sprout::detail::type_traits_wrapper<std::is_move_assignable<T> >
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{};
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template<typename T>
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struct is_destructible
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: public sprout::detail::type_traits_wrapper<std::is_destructible<T> >
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{};
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// template<typename T>
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// struct is_destructible
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// : public sprout::detail::type_traits_wrapper<std::is_destructible<T> >
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// {};
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#if !defined(_LIBCPP_VERSION)
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#if SPROUT_CLANG_HAS_FUTURE(is_trivially_constructible)
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template<typename T, typename... Args>
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