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Workaround for a regression introduced ~MSVC 15.8.1

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This commit is contained in:
Denis Blank 2018-11-18 19:00:38 +01:00
parent 7cf7314486
commit 818b7a7314
1 changed files with 9 additions and 2 deletions
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11
include/continuable/detail/utility/flat-variant.hpp
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@ -54,10 +54,17 @@ constexpr std::size_t max_element_of(std::initializer_list<std::size_t> list) {
}
return m;
}
/// Workarround for a regression introduced in ~ MSVC 15.8.1
template <typename T>
using size_of_helper = std::integral_constant<std::size_t, sizeof(T)>;
template <typename T>
using align_of_helper = std::integral_constant<std::size_t, alignof(T)>;
template <typename... T>
constexpr auto storage_of_impl(traits::identity<T...>) {
constexpr auto size = max_element_of({sizeof(T)...});
constexpr auto align = max_element_of({alignof(T)...});
constexpr auto size = max_element_of({(size_of_helper<T>::value)...});
constexpr auto align = max_element_of({(align_of_helper<T>::value)...});
return std::aligned_storage_t<size, align>{};
}