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refactor(templates): allow some template classes to derive and replace some using with inheritance

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This commit is contained in:
_Redstone_c_
2022-11-21 23:28:19 +08:00
parent e35fa9dd11
commit 058f07fedc
9 changed files with 128 additions and 102 deletions
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6
Redcraft.Utility/Source/Public/Templates/Variant.h
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@ -189,7 +189,7 @@ public:
template <typename T> requires (NAMESPACE_PRIVATE::TVariantSelectedType<TRemoveReference<T>, Ts...>::Value
&& !CTInPlaceType<TRemoveCVRef<T>> && !CTInPlaceIndex<TRemoveCVRef<T>>
&& !CSameAs<TRemoveCVRef<T>, TVariant>)
&& !CBaseOf<TVariant, TRemoveCVRef<T>>)
constexpr TVariant(T&& InValue) : TVariant(InPlaceType<typename NAMESPACE_PRIVATE::TVariantSelectedType<TRemoveReference<T>, Ts...>::Type>, Forward<T>(InValue))
{ }
@ -289,7 +289,7 @@ public:
constexpr bool IsValid() const { return TypeIndex != 0xFF; }
constexpr explicit operator bool() const { return TypeIndex != 0xFF; }
template <size_t I> constexpr bool HoldsAlternative() const { return IsValid() ? GetIndex() == I : false; }
template <size_t I> constexpr bool HoldsAlternative() const { return IsValid() ? GetIndex() == I : false; }
template <typename T> constexpr bool HoldsAlternative() const { return IsValid() ? GetIndex() == TVariantIndex<T, TVariant<Ts...>> : false; }
template <size_t I> requires (I < sizeof...(Ts)) constexpr decltype(auto) GetValue() & { checkf(HoldsAlternative<I>(), TEXT("It is an error to call GetValue() on an wrong TVariant. Please either check HoldsAlternative() or use Get(DefaultValue) instead.")); return *reinterpret_cast< TVariantAlternative<I, TVariant<Ts...>>*>(&Value); }
@ -474,7 +474,7 @@ private:
};
template <typename T, typename... Ts> requires (!CSameAs<T, TVariant<Ts...>> && CEqualityComparable<T>)
template <typename T, typename... Ts> requires (!CBaseOf<TVariant<Ts...>, T> && CEqualityComparable<T>)
constexpr bool operator==(const TVariant<Ts...>& LHS, const T& RHS)
{
return LHS.template HoldsAlternative<T>() ? LHS.template GetValue<T>() == RHS : false;