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refactor: small downcasting refactoring

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This commit is contained in:
Mateusz Pusz
2020-09-12 21:20:17 +02:00
parent be46ac77d6
commit a19c97fe85
2 changed files with 6 additions and 14 deletions
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src/include/units/bits/external/downcasting.h
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+3 -9
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@@ -48,16 +48,10 @@ concept Downcastable =
std::derived_from<T, downcast_base<typename T::downcast_base_type>>;
template<typename T>
concept has_downcast_guide =
requires {
downcast_guide(std::declval<downcast_base<T>>());
};
concept has_downcast_guide = requires(T t) { downcast_guide(t); };
template<typename T>
concept has_downcast_poison_pill =
requires {
downcast_poison_pill(std::declval<downcast_base<T>>());
};
concept has_downcast_poison_pill = requires(T t) { downcast_poison_pill(t); };
template<typename Target, Downcastable T>
struct downcast_child : T {
@@ -98,7 +92,7 @@ constexpr auto downcast_impl()
return T();
}
}
} // namespace detail
template<Downcastable T>
using downcast = decltype(detail::downcast_impl<T>());