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upcasting renamed to downcasting

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This commit is contained in:
Mateusz Pusz
2019-07-18 23:24:24 +02:00
parent 7cbeb35e17
commit 03a22cba2a
15 changed files with 94 additions and 94 deletions
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src/include/units/bits/upcasting.h → src/include/units/bits/downcasting.h
+11 -11
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@@ -28,27 +28,27 @@
namespace units {
template<typename BaseType>
struct upcast_base {
struct downcast_base {
using base_type = BaseType;
};
template<typename T>
concept bool Upcastable =
concept bool Downcastable =
requires {
typename T::base_type;
} &&
std::DerivedFrom<T, upcast_base<typename T::base_type>>;
std::DerivedFrom<T, downcast_base<typename T::base_type>>;
template<Upcastable T>
using upcast_from = T::base_type;
template<Downcastable T>
using downcast_from = T::base_type;
template<Upcastable T>
using upcast_to = std::type_identity<T>;
template<Downcastable T>
using downcast_to = std::type_identity<T>;
template<Upcastable T>
struct upcasting_traits : upcast_to<T> {};
template<Downcastable T>
struct downcasting_traits : downcast_to<T> {};
template<Upcastable T>
using upcasting_traits_t = upcasting_traits<T>::type;
template<Downcastable T>
using downcasting_traits_t = downcasting_traits<T>::type;
} // namespace units