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refactor(miscellaneous): replace TSynthThreeWay with the function version

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This commit is contained in:
_Redstone_c_
2022-04-30 19:27:25 +08:00
parent 38902eb779
commit 7aadebba70
3 changed files with 18 additions and 77 deletions
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66
Redcraft.Utility/Source/Public/Miscellaneous/Compare.h
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@ -68,25 +68,6 @@ struct TCompareThreeWayResult<T, U>
using Type = decltype(DeclVal<const typename TRemoveReference<T>::Type&>() <=> DeclVal<const typename TRemoveReference<U>::Type&>());
};
template <typename T = void> requires (CSameAs<T, void> || CThreeWayComparable<T>)
struct TCompareThreeWay
{
constexpr auto operator()(T&& LHS, T&& RHS) const
{
return Forward<T>(LHS) <=> Forward<T>(RHS);
}
};
template <>
struct TCompareThreeWay<void>
{
template <typename T, typename U> requires CThreeWayComparableWith<T, U>
constexpr auto operator()(T&& LHS, U&& RHS) const
{
return Forward<T>(LHS) <=> Forward<U>(RHS);
}
};
template <typename T, typename OrderingType = partial_ordering>
concept CSynthThreeWayComparable = CThreeWayComparable<T> ||
requires(const TRemoveReference<T>::Type& A, const TRemoveReference<T>::Type& B)
@ -103,56 +84,25 @@ concept CSynthThreeWayComparableWith = CThreeWayComparableWith<T, U> ||
{ B < A } -> CBooleanTestable;
};
template <typename T = void> requires (CSameAs<T, void> || CSynthThreeWayComparable<T>)
struct TSynthThreeWay
template <typename T, typename U> requires CSynthThreeWayComparableWith<T, U>
constexpr decltype(auto) SynthThreeWayCompare(T&& LHS, U&& RHS)
{
constexpr auto operator()(T&& LHS, T&& RHS) const
if constexpr (CThreeWayComparableWith<T, U>)
{
if constexpr (CThreeWayComparable<T>)
{
return Forward<T>(LHS) <=> Forward<T>(RHS);
}
else
{
return Forward<T>(LHS) < Forward<T>(RHS) ? weak_ordering::less : Forward<T>(RHS) < Forward<T>(LHS) ? weak_ordering::greater : weak_ordering::equivalent;
}
return Forward<T>(LHS) <=> Forward<U>(RHS);
}
};
template <>
struct TSynthThreeWay<void>
{
template <typename T, typename U> requires CSynthThreeWayComparableWith<T, U>
constexpr auto operator()(T&& LHS, U&& RHS) const
else
{
if constexpr (CThreeWayComparableWith<T, U>)
{
return Forward<T>(LHS) <=> Forward<U>(RHS);
}
else
{
return Forward<T>(LHS) < Forward<U>(RHS) ? weak_ordering::less : Forward<U>(RHS) < Forward<T>(LHS) ? weak_ordering::greater : weak_ordering::equivalent;
}
return Forward<T>(LHS) < Forward<U>(RHS) ? weak_ordering::less : Forward<U>(RHS) < Forward<T>(LHS) ? weak_ordering::greater : weak_ordering::equivalent;
}
};
}
template <typename T, typename U = T>
struct TSynthThreeWayResult
{
using Type = decltype(TSynthThreeWay{}(DeclVal<const typename TRemoveReference<T>::Type&>(), DeclVal<const typename TRemoveReference<U>::Type&>()));
using Type = decltype(SynthThreeWayCompare(DeclVal<const typename TRemoveReference<T>::Type&>(), DeclVal<const typename TRemoveReference<U>::Type&>()));
};
NAMESPACE_UNNAMED_BEGIN
inline constexpr decltype(NAMESPACE_STD::strong_order) StrongOrder;
inline constexpr decltype(NAMESPACE_STD::weak_order) WeakOrder;
inline constexpr decltype(NAMESPACE_STD::partial_order) PartialOrder;
inline constexpr decltype(NAMESPACE_STD::compare_strong_order_fallback) CompareStrongOrderFallback;
inline constexpr decltype(NAMESPACE_STD::compare_weak_order_fallback) CompareWeakOrderFallback;
inline constexpr decltype(NAMESPACE_STD::compare_partial_order_fallback) ComparePartialOrderFallback;
NAMESPACE_UNNAMED_END
NAMESPACE_MODULE_END(Utility)
NAMESPACE_MODULE_END(Redcraft)
NAMESPACE_REDCRAFT_END