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https://github.com/bolero-MURAKAMI/Sprout.git
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54 lines
1.8 KiB
C++
54 lines
1.8 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2019 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_UTILITY_REINTER_CAST_HPP
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#define SPROUT_UTILITY_REINTER_CAST_HPP
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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/enabler_if.hpp>
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#include <sprout/utility/forward.hpp>
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namespace sprout {
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namespace detail {
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template<typename From, typename To>
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struct is_same_reinterpret_cast
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: public sprout::bool_constant<
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(std::is_reference<To>::value
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&& std::is_same<typename std::decay<From>::type, typename std::decay<To>::type>::value
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&& std::is_convertible<From, To>::value
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)
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|| ((std::is_integral<To>::type || std::is_enum<To>::type || std::is_pointer<To>::type)
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&& std::is_same<typename std::decay<From>::type, To>::value
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)
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>
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{};
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} // namespace detail
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//
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// reinter_cast
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//
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template<
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typename T, typename U,
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typename sprout::enabler_if<sprout::detail::is_same_reinterpret_cast<U&&, T>::value>::type = sprout::enabler
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>
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inline SPROUT_CONSTEXPR T
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reinter_cast(U&& x) {
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return SPROUT_FORWARD(U, x);
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}
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template<
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typename T, typename U,
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typename sprout::enabler_if<!sprout::detail::is_same_reinterpret_cast<U&&, T>::value>::type = sprout::enabler
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>
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inline SPROUT_NON_CONSTEXPR T
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reinter_cast(U&& x) {
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return reinterpret_cast<T>(SPROUT_FORWARD(U, x));
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_UTILITY_REINTER_CAST_HPP
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