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refactor(typetraits): replaces template class type traits with concepts at all

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This commit is contained in:
_Redstone_c_
2022-05-20 23:35:36 +08:00
parent 6a5a101af4
commit ee46d84897
36 changed files with 292 additions and 554 deletions
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26
Redcraft.Utility/Source/Public/Templates/Variant.h
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@ -49,7 +49,7 @@ struct TVariantSelectedType;
template <typename T, typename U, typename... Types>
struct TVariantSelectedType<T, U, Types...>
{
using TypeAlternativeA = typename TConditional<CConstructible<U, T&&>, U, void>::Type;
using TypeAlternativeA = typename TConditional<CConstructibleFrom<U, T&&>, U, void>::Type;
using TypeAlternativeB = typename TVariantSelectedType<T, Types...>::Type;
using Type = typename TConditional<CSameAs<typename TRemoveCVRef<TypeAlternativeA>::Type, void>, TypeAlternativeB,
@ -103,7 +103,7 @@ struct TVariant
}
template <size_t I, typename... ArgTypes> requires (I < AlternativeSize)
&& CConstructible<typename TAlternativeType<I>::Type, ArgTypes...>
&& CConstructibleFrom<typename TAlternativeType<I>::Type, ArgTypes...>
constexpr explicit TVariant(TInPlaceIndex<I>, ArgTypes&&... Args)
: TypeIndex(I)
{
@ -112,13 +112,13 @@ struct TVariant
}
template <typename T, typename... ArgTypes> requires (TAlternativeIndex<T>::Value != INDEX_NONE)
&& CConstructible<typename TAlternativeType<TAlternativeIndex<T>::Value>::Type, ArgTypes...>
&& CConstructibleFrom<typename TAlternativeType<TAlternativeIndex<T>::Value>::Type, ArgTypes...>
constexpr explicit TVariant(TInPlaceType<T>, ArgTypes&&... Args)
: TVariant(InPlaceIndex<TAlternativeIndex<T>::Value>, Forward<ArgTypes>(Args)...)
{ }
template <typename T> requires NAMESPACE_PRIVATE::TVariantSelectedType<typename TRemoveReference<T>::Type, Types...>::Value
&& (!TIsTInPlaceType<typename TRemoveCVRef<T>::Type>::Value) && (!TIsTInPlaceIndex<typename TRemoveCVRef<T>::Type>::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))
{ }
@ -187,7 +187,7 @@ struct TVariant
}
template <size_t I, typename... ArgTypes> requires (I < AlternativeSize)
&& CConstructible<typename TAlternativeType<I>::Type, ArgTypes...>
&& CConstructibleFrom<typename TAlternativeType<I>::Type, ArgTypes...>
constexpr typename TAlternativeType<I>::Type& Emplace(ArgTypes&&... Args)
{
Reset();
@ -200,7 +200,7 @@ struct TVariant
}
template <typename T, typename... ArgTypes> requires (TAlternativeIndex<T>::Value != INDEX_NONE)
&& CConstructible<typename TAlternativeType<TAlternativeIndex<T>::Value>::Type, ArgTypes...>
&& CConstructibleFrom<typename TAlternativeType<TAlternativeIndex<T>::Value>::Type, ArgTypes...>
constexpr T& Emplace(ArgTypes&&... Args)
{
return Emplace<TAlternativeIndex<T>::Value>(Forward<ArgTypes>(Args)...);
@ -319,7 +319,7 @@ struct TVariant
return HashCombine(GetTypeHash(GetIndex()), HashImpl[GetIndex()](&Value));
}
constexpr void Swap(TVariant& InValue) requires (true && ... && (CMoveConstructible<Types> && TIsSwappable<Types>::Value))
constexpr void Swap(TVariant& InValue) requires (true && ... && (CMoveConstructible<Types> && CSwappable<Types>))
{
if (!IsValid() && !InValue.IsValid()) return;
@ -409,16 +409,22 @@ constexpr bool operator==(const TVariant<Types...>& LHS, FInvalid)
return !LHS.IsValid();
}
NAMESPACE_PRIVATE_BEGIN
template <typename T > struct TIsTVariant : FFalse { };
template <typename... Types> struct TIsTVariant<TVariant<Types...>> : FTrue { };
template <typename VariantType> requires TIsTVariant<typename TRemoveCVRef<VariantType>::Type>::Value
NAMESPACE_PRIVATE_END
template <typename T> concept CTVariant = NAMESPACE_PRIVATE::TIsTVariant<T>::Value;
template <typename VariantType> requires CTVariant<typename TRemoveCVRef<VariantType>::Type>
struct TVariantAlternativeSize : TConstant<size_t, VariantType::AlternativeSize> { };
template <size_t I, typename VariantType> requires TIsTVariant<typename TRemoveCVRef<VariantType>::Type>::Value
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 <typename T, typename VariantType> requires TIsTVariant<typename TRemoveCVRef<VariantType>::Type>::Value
template <typename T, typename VariantType> requires CTVariant<typename TRemoveCVRef<VariantType>::Type>
struct TVariantAlternativeIndex : VariantType::template TAlternativeIndex<T> { };
NAMESPACE_MODULE_END(Utility)