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refactor(miscellaneous): fix iterator concepts and helper function return value types

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Redstone1024 2024-12-05 21:19:55 +08:00
parent 7525c9a5dd
commit 8d02b0e0a9
1 changed files with 29 additions and 24 deletions
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51
Redcraft.Utility/Source/Public/Miscellaneous/Iterator.h
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@ -92,8 +92,13 @@ template <typename S, typename I>
inline constexpr bool bDisableSizedSentinelFor = false;
template <typename S, typename I>
concept CSizedSentinelFor = CSentinelFor<S, I> && CPartiallyOrdered<S, I> && !bDisableSizedSentinelFor<TRemoveCV<S>, TRemoveCV<I>>
&& requires(const I& Iter, const S& Sentinel) { Sentinel - Iter; Iter - Sentinel; };
concept CSizedSentinelFor = CSentinelFor<S, I> && CPartiallyOrdered<S, I>
&& !bDisableSizedSentinelFor<TRemoveCV<S>, TRemoveCV<I>>
&& requires(const I& Iter, const S& Sentinel)
{
{ Sentinel - Iter } -> CSameAs<ptrdiff>;
{ Iter - Sentinel } -> CSameAs<ptrdiff>;
};
template <typename I>
concept CInputIterator = CInputOrOutputIterator<I> && CIndirectlyReadable<I>;
@ -409,7 +414,7 @@ public:
FORCEINLINE constexpr TCountedIterator& operator++() { ++Current; --Length; CheckThis(); return *this; }
FORCEINLINE constexpr TCountedIterator& operator--() requires (CBidirectionalIterator<IteratorType>) { --Current; ++Length; CheckThis(); return *this; }
FORCEINLINE constexpr decltype(auto) operator++(int) { --Length; CheckThis(); return Current++; }
FORCEINLINE constexpr auto operator++(int) { --Length; CheckThis(); return Current++; }
FORCEINLINE constexpr TCountedIterator operator++(int) requires (CForwardIterator<IteratorType>) { TCountedIterator Temp = *this; ++Current; --Length; CheckThis(); return Temp; }
FORCEINLINE constexpr TCountedIterator operator--(int) requires (CBidirectionalIterator<IteratorType>) { TCountedIterator Temp = *this; --Current; ++Length; CheckThis(); return Temp; }
@ -674,7 +679,7 @@ FORCEINLINE constexpr I Prev(I Iter, TMakeUnsigned<ptrdiff> N = 1)
/** @return The iterator to the beginning of a container. */
template <typename T> requires (requires(T&& Container) { { Container.Begin() } -> CForwardIterator; })
FORCEINLINE constexpr decltype(auto) Begin(T&& Container)
FORCEINLINE constexpr auto Begin(T&& Container)
{
return Container.Begin();
}
@ -687,14 +692,14 @@ template <typename T, size_t N> FORCEINLINE constexpr const T* Begin(const T(&&
/** Overloads the Begin algorithm for initializer_list. */
template <typename T>
FORCEINLINE constexpr decltype(auto) Begin(initializer_list<T> Container)
FORCEINLINE constexpr auto Begin(initializer_list<T> Container)
{
return Container.begin();
}
/** @return The iterator to the end of a container. */
template <typename T> requires (requires(T&& Container) { { Container.End() } -> CForwardIterator; })
FORCEINLINE constexpr decltype(auto) End(T&& Container)
FORCEINLINE constexpr auto End(T&& Container)
{
return Container.End();
}
@ -707,47 +712,47 @@ template <typename T, size_t N> FORCEINLINE constexpr const T* End(const T(&& Co
/** Overloads the End algorithm for initializer_list. */
template <typename T>
FORCEINLINE constexpr decltype(auto) End(initializer_list<T> Container)
FORCEINLINE constexpr auto End(initializer_list<T> Container)
{
return Container.end();
}
/** @return The reverse iterator to the beginning of a container. */
template <typename T> requires (requires(T&& Container) { { Container.RBegin() } -> CForwardIterator; })
FORCEINLINE constexpr decltype(auto) RBegin(T&& Container)
FORCEINLINE constexpr auto RBegin(T&& Container)
{
return Container.RBegin();
}
/** Overloads the RBegin algorithm for arrays. */
template <typename T, size_t N> FORCEINLINE constexpr decltype(auto) RBegin( T(& Container)[N]) { return TReverseIterator(End(Container)); }
template <typename T, size_t N> FORCEINLINE constexpr decltype(auto) RBegin( T(&& Container)[N]) { return TReverseIterator(End(Container)); }
template <typename T, size_t N> FORCEINLINE constexpr decltype(auto) RBegin(const T(& Container)[N]) { return TReverseIterator(End(Container)); }
template <typename T, size_t N> FORCEINLINE constexpr decltype(auto) RBegin(const T(&& Container)[N]) { return TReverseIterator(End(Container)); }
template <typename T, size_t N> FORCEINLINE constexpr auto RBegin( T(& Container)[N]) { return TReverseIterator(End(Container)); }
template <typename T, size_t N> FORCEINLINE constexpr auto RBegin( T(&& Container)[N]) { return TReverseIterator(End(Container)); }
template <typename T, size_t N> FORCEINLINE constexpr auto RBegin(const T(& Container)[N]) { return TReverseIterator(End(Container)); }
template <typename T, size_t N> FORCEINLINE constexpr auto RBegin(const T(&& Container)[N]) { return TReverseIterator(End(Container)); }
/** Overloads the RBegin algorithm for initializer_list. */
template <typename T>
FORCEINLINE constexpr decltype(auto) RBegin(initializer_list<T> Container)
FORCEINLINE constexpr auto RBegin(initializer_list<T> Container)
{
return TReverseIterator(Container.end());
}
/** @return The reverse iterator to the end of a container. */
template <typename T> requires (requires(T&& Container) { { Container.REnd() } -> CForwardIterator; })
FORCEINLINE constexpr decltype(auto) REnd(T&& Container)
FORCEINLINE constexpr auto REnd(T&& Container)
{
return Container.REnd();
}
/** Overloads the REnd algorithm for arrays. */
template <typename T, size_t N> FORCEINLINE constexpr decltype(auto) REnd( T(& Container)[N]) { return TReverseIterator(Begin(Container)); }
template <typename T, size_t N> FORCEINLINE constexpr decltype(auto) REnd( T(&& Container)[N]) { return TReverseIterator(Begin(Container)); }
template <typename T, size_t N> FORCEINLINE constexpr decltype(auto) REnd(const T(& Container)[N]) { return TReverseIterator(Begin(Container)); }
template <typename T, size_t N> FORCEINLINE constexpr decltype(auto) REnd(const T(&& Container)[N]) { return TReverseIterator(Begin(Container)); }
template <typename T, size_t N> FORCEINLINE constexpr auto REnd( T(& Container)[N]) { return TReverseIterator(Begin(Container)); }
template <typename T, size_t N> FORCEINLINE constexpr auto REnd( T(&& Container)[N]) { return TReverseIterator(Begin(Container)); }
template <typename T, size_t N> FORCEINLINE constexpr auto REnd(const T(& Container)[N]) { return TReverseIterator(Begin(Container)); }
template <typename T, size_t N> FORCEINLINE constexpr auto REnd(const T(&& Container)[N]) { return TReverseIterator(Begin(Container)); }
/** Overloads the REnd algorithm for initializer_list. */
template <typename T>
FORCEINLINE constexpr decltype(auto) REnd(initializer_list<T> Container)
FORCEINLINE constexpr auto REnd(initializer_list<T> Container)
{
return TReverseIterator(Container.begin());
}
@ -755,10 +760,10 @@ FORCEINLINE constexpr decltype(auto) REnd(initializer_list<T> Container)
NAMESPACE_END(Iteration)
#define ENABLE_RANGE_BASED_FOR_LOOP_SUPPORT public: \
NODISCARD FORCEINLINE constexpr decltype(auto) begin() { return Begin(); } \
NODISCARD FORCEINLINE constexpr decltype(auto) begin() const { return Begin(); } \
NODISCARD FORCEINLINE constexpr decltype(auto) end() { return End(); } \
NODISCARD FORCEINLINE constexpr decltype(auto) end() const { return End(); }
NODISCARD FORCEINLINE constexpr auto begin() { return Begin(); } \
NODISCARD FORCEINLINE constexpr auto begin() const { return Begin(); } \
NODISCARD FORCEINLINE constexpr auto end() { return End(); } \
NODISCARD FORCEINLINE constexpr auto end() const { return End(); }
NAMESPACE_MODULE_END(Utility)
NAMESPACE_MODULE_END(Redcraft)