99 lines
3.0 KiB
C++
99 lines
3.0 KiB
C++
#pragma once
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#include "CoreTypes.h"
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#include "Iterator/Utility.h"
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#include "Iterator/Sentinel.h"
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#include "Iterator/RandomAccessIterator.h"
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#include "TypeTraits/TypeTraits.h"
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#include "Memory/Address.h"
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NAMESPACE_REDCRAFT_BEGIN
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NAMESPACE_MODULE_BEGIN(Redcraft)
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NAMESPACE_MODULE_BEGIN(Utility)
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#if PLATFORM_COMPILER_GCC
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# pragma GCC diagnostic push
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# pragma GCC diagnostic ignored "-Wnon-template-friend"
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#endif
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/**
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* A concept specifies a type is a contiguous iterator.
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* Add the operator-> to the random access iterator and requires the operator* returns a true reference type.
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*/
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template <typename I>
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concept CContiguousIterator = CRandomAccessIterator<I> && CLValueReference<TIteratorReference<I>>
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&& CSameAs<TIteratorElement<I>, TRemoveCVRef<TIteratorReference<I>>>
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&& CSameAs<TIteratorPointer<I>, TAddPointer<TIteratorReference<I>>>
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&& requires(I& Iter)
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{
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{ ToAddress(Iter) } -> CSameAs<TAddPointer<TIteratorReference<I>>>;
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};
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/** This is an example of a contiguous iterator, indicate the traits that define a contiguous iterator. */
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template <CLValueReference T>
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struct IContiguousIterator /* : IRandomAccessIterator<T> */
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{
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// ~Begin CRandomAccessIterator.
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using ElementType = TRemoveCVRef<T>;
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IContiguousIterator();
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IContiguousIterator(const IContiguousIterator&);
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IContiguousIterator(IContiguousIterator&&);
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IContiguousIterator* operator=(const IContiguousIterator&);
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IContiguousIterator* operator=(IContiguousIterator&&);
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friend bool operator==(const IContiguousIterator&, const IContiguousIterator&);
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friend strong_ordering operator<=>(const IContiguousIterator&, const IContiguousIterator&);
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// ~End CRandomAccessIterator.
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/**
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* Dereference operator. See IForwardIterator.
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* Specify, the return type must be a true reference type and refer to an element of a contiguous sequence, not a proxy class.
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* Also satisfies CRandomAccessIterator.
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*/
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T operator*() const;
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/** Indirection operator. Return the address of the element that the iterator is pointing to. */
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TAddPointer<T> operator->() const;
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// ~Begin CRandomAccessIterator.
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T operator[](ptrdiff) const;
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IContiguousIterator& operator++();
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IContiguousIterator& operator--();
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IContiguousIterator operator++(int);
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IContiguousIterator operator--(int);
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IContiguousIterator& operator+=(ptrdiff);
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IContiguousIterator& operator-=(ptrdiff);
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IContiguousIterator operator+(ptrdiff) const;
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IContiguousIterator operator-(ptrdiff) const;
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friend IContiguousIterator operator+(ptrdiff, const IContiguousIterator&);
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friend ptrdiff operator-(const IContiguousIterator&, const IContiguousIterator&);
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// ~End CRandomAccessIterator.
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};
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// Use IContiguousIterator<int> represents a contiguous iterator
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static_assert(CContiguousIterator<IContiguousIterator<int&>>);
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static_assert( COutputIterator<IContiguousIterator<int&>, int>);
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// The int* is the most typical example of a contiguous iterator
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static_assert(CContiguousIterator<int*>);
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#if PLATFORM_COMPILER_GCC
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# pragma GCC diagnostic pop
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#endif
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NAMESPACE_MODULE_END(Utility)
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NAMESPACE_MODULE_END(Redcraft)
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NAMESPACE_REDCRAFT_END
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