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feat(templates): add TOptional and TVariant to compare the equivalence of Invalid

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_Redstone_c_
2022-03-22 11:12:05 +08:00
parent be1d91591c
commit 2f55c84c32
2 changed files with 49 additions and 0 deletions
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24
Redcraft.Utility/Source/Public/Templates/Optional.h
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@ -249,6 +249,30 @@ constexpr bool operator!=(const T& LHS, const TOptional<U>& RHS)
return RHS.IsValid() ? LHS != *RHS : true;
}
template <typename T>
constexpr bool operator==(const TOptional<T>& LHS, FInvalid)
{
return !LHS.IsValid();
}
template <typename T>
constexpr bool operator!=(const TOptional<T>& LHS, FInvalid)
{
return LHS.IsValid();
}
template <typename T>
constexpr bool operator==(FInvalid, const TOptional<T>& RHS)
{
return !RHS.IsValid();
}
template <typename T>
constexpr bool operator!=(FInvalid, const TOptional<T>& RHS)
{
return RHS.IsValid();
}
template <typename T>
constexpr TOptional<typename TDecay<T>::Type> MakeOptional(FInvalid)
{