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refactor(typetraits): replaces template class type traits with alias template for TypeTraits/Miscellaneous.h

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This commit is contained in:
_Redstone_c_
2022-05-22 22:52:47 +08:00
parent 97910be70c
commit 2ce259e7cc
16 changed files with 233 additions and 236 deletions
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38
Redcraft.Utility/Source/Public/Templates/Variant.h
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@ -49,21 +49,21 @@ struct TVariantSelectedType;
template <typename T, typename U, typename... Types>
struct TVariantSelectedType<T, U, Types...>
{
using TypeAlternativeA = typename TConditional<CConstructibleFrom<U, T&&>, U, void>::Type;
using TypeAlternativeA = TConditional<CConstructibleFrom<U, T&&>, U, void>;
using TypeAlternativeB = typename TVariantSelectedType<T, Types...>::Type;
using Type = typename TConditional<CSameAs<typename TRemoveCVRef<TypeAlternativeA>::Type, void>, TypeAlternativeB,
typename TConditional<CSameAs<typename TRemoveCVRef<TypeAlternativeB>::Type, void>, TypeAlternativeA,
typename TConditional<CSameAs<typename TRemoveCVRef<TypeAlternativeB>::Type, typename TRemoveCVRef<T>::Type>, TypeAlternativeB, TypeAlternativeA>::Type>::Type>::Type;
using Type = TConditional<CSameAs<TRemoveCVRef<TypeAlternativeA>, void>, TypeAlternativeB,
TConditional<CSameAs<TRemoveCVRef<TypeAlternativeB>, void>, TypeAlternativeA,
TConditional<CSameAs<TRemoveCVRef<TypeAlternativeB>, TRemoveCVRef<T>>, TypeAlternativeB, TypeAlternativeA>>>;
// 0 - Type not found
// 1 - Same type found
// 2 - Multiple types found
// 3 - The type found
static constexpr uint8 Flag = CSameAs<typename TRemoveCVRef<Type>::Type, void> ? 0 :
CSameAs<typename TRemoveCVRef<TypeAlternativeA>::Type, typename TRemoveCVRef<TypeAlternativeB>::Type> ? 2 :
CSameAs<typename TRemoveCVRef< Type>::Type, typename TRemoveCVRef< T>::Type> ? 1 :
!CSameAs<typename TRemoveCVRef<TypeAlternativeA>::Type, void> && !CSameAs<TypeAlternativeB, void> ? 2 : 3;
static constexpr uint8 Flag = CSameAs<TRemoveCVRef<Type>, void> ? 0 :
CSameAs<TRemoveCVRef<TypeAlternativeA>, TRemoveCVRef<TypeAlternativeB>> ? 2 :
CSameAs<TRemoveCVRef< Type>, TRemoveCVRef< T>> ? 1 :
!CSameAs<TRemoveCVRef<TypeAlternativeA>, void> && !CSameAs<TypeAlternativeB, void> ? 2 : 3;
static constexpr bool Value = Flag & 1;
@ -117,10 +117,10 @@ struct TVariant
: TVariant(InPlaceIndex<TAlternativeIndex<T>::Value>, Forward<ArgTypes>(Args)...)
{ }
template <typename T> requires NAMESPACE_PRIVATE::TVariantSelectedType<typename TRemoveReference<T>::Type, Types...>::Value
&& (!CTInPlaceType<typename TRemoveCVRef<T>::Type>) && (!CTInPlaceIndex<typename TRemoveCVRef<T>::Type>)
&& (!CSameAs<typename TRemoveCVRef<T>::Type, TVariant>)
constexpr TVariant(T&& InValue) : TVariant(InPlaceType<typename NAMESPACE_PRIVATE::TVariantSelectedType<typename TRemoveReference<T>::Type, Types...>::Type>, Forward<T>(InValue))
template <typename T> requires NAMESPACE_PRIVATE::TVariantSelectedType<TRemoveReference<T>, Types...>::Value
&& (!CTInPlaceType<TRemoveCVRef<T>>) && (!CTInPlaceIndex<TRemoveCVRef<T>>)
&& (!CSameAs<TRemoveCVRef<T>, TVariant>)
constexpr TVariant(T&& InValue) : TVariant(InPlaceType<typename NAMESPACE_PRIVATE::TVariantSelectedType<TRemoveReference<T>, Types...>::Type>, Forward<T>(InValue))
{ }
constexpr ~TVariant()
@ -170,10 +170,10 @@ struct TVariant
return *this;
}
template <typename T> requires NAMESPACE_PRIVATE::TVariantSelectedType<typename TRemoveReference<T>::Type, Types...>::Value
template <typename T> requires NAMESPACE_PRIVATE::TVariantSelectedType<TRemoveReference<T>, Types...>::Value
constexpr TVariant& operator=(T&& InValue)
{
using SelectedType = typename NAMESPACE_PRIVATE::TVariantSelectedType<typename TRemoveReference<T>::Type, Types...>::Type;
using SelectedType = typename NAMESPACE_PRIVATE::TVariantSelectedType<TRemoveReference<T>, Types...>::Type;
if (GetIndex() == TAlternativeIndex<SelectedType>::Value) GetValue<SelectedType>() = Forward<T>(InValue);
else
@ -370,7 +370,7 @@ private:
static constexpr FMoveAssignImpl MoveAssignImpl[] = { [](void* A, void* B) { if constexpr (requires(Types* A, Types* B) { Memory::MoveAssign (A, B); }) Memory::MoveAssign (reinterpret_cast<Types*>(A), reinterpret_cast< Types*>(B)); else checkf(false, TEXT("The type '%s' is not move assignable."), typeid(Types).name()); }... };
static constexpr FDestroyImpl DestroyImpl[] = { [](void* A ) { if constexpr (requires(Types* A ) { Memory::Destruct (A ); }) Memory::Destruct (reinterpret_cast<Types*>(A) ); else checkf(false, TEXT("The type '%s' is not destructible."), typeid(Types).name()); }... };
TAlignedUnion<1, Types...>::Type Value;
TAlignedUnion<1, Types...> Value;
uint8 TypeIndex;
friend constexpr bool operator==(const TVariant& LHS, const TVariant& RHS) requires (true && ... && CEqualityComparable<Types>)
@ -418,13 +418,13 @@ NAMESPACE_PRIVATE_END
template <typename T> concept CTVariant = NAMESPACE_PRIVATE::TIsTVariant<T>::Value;
template <typename VariantType> requires CTVariant<typename TRemoveCVRef<VariantType>::Type>
template <typename VariantType> requires CTVariant<TRemoveCVRef<VariantType>>
struct TVariantAlternativeSize : TConstant<size_t, VariantType::AlternativeSize> { };
template <size_t I, typename VariantType> requires CTVariant<typename TRemoveCVRef<VariantType>::Type>
struct TVariantAlternativeType { using Type = typename TCopyCV<typename TRemoveReference<VariantType>::Type, typename TRemoveCVRef<VariantType>::Type::template TAlternativeType<I>::Type>::Type; };
template <size_t I, typename VariantType> requires CTVariant<TRemoveCVRef<VariantType>>
struct TVariantAlternativeType { using Type = typename TCopyCV<TRemoveReference<VariantType>, typename TRemoveCVRef<VariantType>::template TAlternativeType<I>::Type>::Type; };
template <typename T, typename VariantType> requires CTVariant<typename TRemoveCVRef<VariantType>::Type>
template <typename T, typename VariantType> requires CTVariant<TRemoveCVRef<VariantType>>
struct TVariantAlternativeIndex : VariantType::template TAlternativeIndex<T> { };
NAMESPACE_MODULE_END(Utility)