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refactor(iterator): split iterator library into multiple files

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Redstone1024
2024-12-14 16:20:26 +08:00
parent a55f03fea0
commit cd7adbfd46
8 changed files with 579 additions and 496 deletions
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102
Redcraft.Utility/Source/Public/Iterator/ReverseIterator.h Normal file
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#pragma once
#include "CoreTypes.h"
#include "Iterator/Utility.h"
#include "Iterator/Sentinel.h"
#include "Iterator/BidirectionalIterator.h"
#include "Iterator/RandomAccessIterator.h"
#include "Iterator/ContiguousIterator.h"
#include "Miscellaneous/Compare.h"
#include "TypeTraits/TypeTraits.h"
#include "Templates/Utility.h"
#include "Memory/Address.h"
NAMESPACE_REDCRAFT_BEGIN
NAMESPACE_MODULE_BEGIN(Redcraft)
NAMESPACE_MODULE_BEGIN(Utility)
/**
* An iterator adaptor for reverse-order traversal.
* When based on at least a bidirectional iterator, the reverse iterator satisfies at least a bidirectional iterator
* up to a random access iterator. When based on an output iterator, the reverse iterator satisfies an output iterator.
*/
template <CBidirectionalIterator I>
class TReverseIterator final
{
public:
using IteratorType = I;
using ElementType = TIteratorElement<I>;
FORCEINLINE constexpr TReverseIterator() = default;
FORCEINLINE constexpr TReverseIterator(const TReverseIterator&) = default;
FORCEINLINE constexpr TReverseIterator(TReverseIterator&&) = default;
FORCEINLINE constexpr TReverseIterator& operator=(const TReverseIterator&) = default;
FORCEINLINE constexpr TReverseIterator& operator=(TReverseIterator&&) = default;
FORCEINLINE constexpr ~TReverseIterator() = default;
FORCEINLINE constexpr explicit TReverseIterator(IteratorType InValue) : Current(InValue) { }
template <CBidirectionalIterator J> requires (!CSameAs<I, J> && CConstructibleFrom<I, const J&>)
FORCEINLINE constexpr explicit (!CConvertibleTo<const J&, I>) TReverseIterator(const TReverseIterator<J>& InValue) : Current(InValue.GetBase()) { }
template <CBidirectionalIterator J> requires (!CSameAs<I, J> && CConvertibleTo<const J&, I> && CAssignableFrom<I&, const J&>)
FORCEINLINE constexpr TReverseIterator& operator=(const TReverseIterator<J>& InValue) { Current = InValue.GetBase(); return *this; }
template <CBidirectionalIterator J> requires (CSentinelFor<J, I>)
NODISCARD friend FORCEINLINE constexpr bool operator==(const TReverseIterator& LHS, const TReverseIterator<J>& RHS) { return LHS.GetBase() == RHS.GetBase(); }
template <CBidirectionalIterator J> requires (CThreeWayComparable<I, J>)
NODISCARD friend FORCEINLINE constexpr TCompareThreeWayResult<I, J> operator<=>(const TReverseIterator& LHS, const TReverseIterator<J>& RHS) { return RHS.GetBase() <=> LHS.GetBase(); }
NODISCARD FORCEINLINE constexpr TIteratorReference<I> operator*() const { IteratorType Temp = GetBase(); return *--Temp; }
NODISCARD FORCEINLINE constexpr auto operator->() const requires (requires(const I Iter) { { ToAddress(Iter) } -> CSameAs<TIteratorPointer<I>>; }) { IteratorType Temp = GetBase(); return ToAddress(--Temp); }
NODISCARD FORCEINLINE constexpr TIteratorReference<I> operator[](ptrdiff Index) const requires (CRandomAccessIterator<I>) { return GetBase()[-Index - 1]; }
FORCEINLINE constexpr TReverseIterator& operator++() { --Current; return *this; }
FORCEINLINE constexpr TReverseIterator& operator--() { ++Current; return *this; }
FORCEINLINE constexpr TReverseIterator operator++(int) { TReverseIterator Temp = *this; --Current; return Temp; }
FORCEINLINE constexpr TReverseIterator operator--(int) { TReverseIterator Temp = *this; ++Current; return Temp; }
FORCEINLINE constexpr TReverseIterator& operator+=(ptrdiff Offset) requires (CRandomAccessIterator<I>) { Current -= Offset; return *this; }
FORCEINLINE constexpr TReverseIterator& operator-=(ptrdiff Offset) requires (CRandomAccessIterator<I>) { Current += Offset; return *this; }
NODISCARD FORCEINLINE constexpr TReverseIterator operator+(ptrdiff Offset) const requires (CRandomAccessIterator<I>) { TReverseIterator Temp = *this; Temp -= Offset; return Temp; }
NODISCARD FORCEINLINE constexpr TReverseIterator operator-(ptrdiff Offset) const requires (CRandomAccessIterator<I>) { TReverseIterator Temp = *this; Temp += Offset; return Temp; }
NODISCARD friend FORCEINLINE constexpr TReverseIterator operator+(ptrdiff Offset, const TReverseIterator& Iter) requires (CRandomAccessIterator<I>) { return Iter + Offset; }
NODISCARD friend FORCEINLINE constexpr ptrdiff operator-(const TReverseIterator& LHS, const TReverseIterator& RHS) requires (CRandomAccessIterator<I>) { return RHS.GetBase() - LHS.GetBase(); }
NODISCARD FORCEINLINE constexpr const IteratorType& GetBase() const& { return Current; }
NODISCARD FORCEINLINE constexpr IteratorType GetBase() && { return MoveTemp(Current); }
private:
IteratorType Current;
};
template <typename I, typename J> requires (!CSizedSentinelFor<I, J>)
inline constexpr bool bDisableSizedSentinelFor<TReverseIterator<I>, TReverseIterator<J>> = true;
static_assert(CBidirectionalIterator<TReverseIterator<IBidirectionalIterator<int&>>>);
static_assert( CRandomAccessIterator<TReverseIterator< IRandomAccessIterator<int&>>>);
static_assert( CRandomAccessIterator<TReverseIterator< IContiguousIterator<int&>>>);
static_assert(COutputIterator<TReverseIterator<IBidirectionalIterator<int&>>, int>);
/** Creates a TReverseIterator of type inferred from the argument. */
template <typename I> requires (CBidirectionalIterator<TDecay<I>> && CConstructibleFrom<TDecay<I>, I>)
NODISCARD FORCEINLINE constexpr auto MakeReverseIterator(I&& Iter)
{
return TReverseIterator<TDecay<I>>(Forward<I>(Iter));
}
NAMESPACE_MODULE_END(Utility)
NAMESPACE_MODULE_END(Redcraft)
NAMESPACE_REDCRAFT_END