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refactor(templates): optimize TOptional and TVariant, add necessary constraints

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This commit is contained in:
_Redstone_c_
2022-03-31 12:07:15 +08:00
parent d8a4908a88
commit c4c205e35b
2 changed files with 23 additions and 23 deletions
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20
Redcraft.Utility/Source/Public/Templates/Variant.h
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@ -216,13 +216,13 @@ struct TVariant
constexpr TVariant(FInvalid) : TVariant() { };
constexpr TVariant(const TVariant& InValue)
constexpr TVariant(const TVariant& InValue) requires (true && ... && TIsCopyConstructible<Types>::Value)
: TypeIndex(InValue.GetIndex())
{
if (GetIndex() != INDEX_NONE) FHelper::CopyConstructFuncs[InValue.GetIndex()](&Value, &InValue.Value);
}
constexpr TVariant(TVariant&& InValue)
constexpr TVariant(TVariant&& InValue) requires (true && ... && TIsMoveConstructible<Types>::Value)
: TypeIndex(InValue.GetIndex())
{
if (GetIndex() != INDEX_NONE) FHelper::MoveConstructFuncs[InValue.GetIndex()](&Value, &InValue.Value);
@ -254,7 +254,7 @@ struct TVariant
if constexpr (!(true && ... && TIsTriviallyDestructible<Types>::Value)) Reset();
}
constexpr TVariant& operator=(const TVariant& InValue)
constexpr TVariant& operator=(const TVariant& InValue) requires (true && ... && (TIsCopyConstructible<Types>::Value && TIsCopyAssignable<Types>::Value))
{
if (&InValue == this) return *this;
@ -275,7 +275,7 @@ struct TVariant
return *this;
}
constexpr TVariant& operator=(TVariant&& InValue)
constexpr TVariant& operator=(TVariant&& InValue) requires (true && ... && (TIsMoveConstructible<Types>::Value && TIsMoveAssignable<Types>::Value))
{
if (&InValue == this) return *this;
@ -437,14 +437,14 @@ private:
TAlignedUnion<1, Types...>::Type Value;
size_t TypeIndex;
friend constexpr bool operator==(const TVariant& LHS, const TVariant& RHS)
friend constexpr bool operator==(const TVariant& LHS, const TVariant& RHS) requires (true && ... && CEqualityComparable<Types>)
{
if (LHS.GetIndex() != RHS.GetIndex()) return false;
if (LHS.IsValid() == false) return true;
return FHelper::EqualityOperatorFuncs[LHS.GetIndex()](&LHS.Value, &RHS.Value);
}
friend constexpr bool operator!=(const TVariant& LHS, const TVariant& RHS)
friend constexpr bool operator!=(const TVariant& LHS, const TVariant& RHS) requires (true && ... && CEqualityComparable<Types>)
{
if (LHS.GetIndex() != RHS.GetIndex()) return true;
if (LHS.IsValid() == false) return false;
@ -453,25 +453,25 @@ private:
};
template <typename T, typename... Types>
template <typename T, typename... Types> requires (!TIsSame<T, TVariant<Types...>>::Value) && CEqualityComparable<T>
constexpr bool operator==(const TVariant<Types...>& LHS, const T& RHS)
{
return LHS.template HoldsAlternative<T>() ? LHS.template GetValue<T>() == RHS : false;
}
template <typename T, typename... Types>
template <typename T, typename... Types> requires (!TIsSame<T, TVariant<Types...>>::Value) && CEqualityComparable<T>
constexpr bool operator!=(const TVariant<Types...>& LHS, const T& RHS)
{
return LHS.template HoldsAlternative<T>() ? LHS.template GetValue<T>() != RHS : true;
}
template <typename T, typename... Types>
template <typename T, typename... Types> requires (!TIsSame<T, TVariant<Types...>>::Value) && CEqualityComparable<T>
constexpr bool operator==(const T& LHS, const TVariant<Types...>& RHS)
{
return RHS.template HoldsAlternative<T>() ? LHS == RHS.template GetValue<T>() : false;
}
template <typename T, typename... Types>
template <typename T, typename... Types> requires (!TIsSame<T, TVariant<Types...>>::Value) && CEqualityComparable<T>
constexpr bool operator!=(const T& LHS, const TVariant<Types...>& RHS)
{
return RHS.template HoldsAlternative<T>() ? LHS != RHS.template GetValue<T>() : true;