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32 lines
624 B
C++
32 lines
624 B
C++
/**
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* \file libimp/horrible_cast.h
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* \author mutouyun (orz@orzz.org)
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* \date 2022-04-17
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*/
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#pragma once
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#include <type_traits> // std::decay_t
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#include <utility>
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#include "libimp/def.h"
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LIBIMP_NAMESPACE_BEG_
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namespace detail_horrible_cast {
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template <typename T, typename U>
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union temp {
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std::decay_t<U> in;
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T out;
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};
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} // namespace detail_horrible_cast
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template <typename T, typename U>
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constexpr auto horrible_cast(U &&in) noexcept
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-> std::enable_if_t<(sizeof(T) == sizeof(std::decay_t<U>)), T> {
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return detail_horrible_cast::temp<T, std::decay_t<U>>{std::forward<U>(in)}.out;
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}
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LIBIMP_NAMESPACE_END_
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