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iterator.h
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#pragma once
namespacejitstd
{
template <classCategory, classT, classDistance = ptrdiff_t, classPointer = T*, classReference = T&>
structiterator
{
typedef T value_type;
typedef Distance difference_type;
typedef Pointer pointer;
typedef Reference reference;
typedef Category iterator_category;
};
structinput_iterator_tag
{
};
structforward_iterator_tag : publicinput_iterator_tag
{
};
structbidirectional_iterator_tag : publicforward_iterator_tag
{
};
structrandom_access_iterator_tag : publicbidirectional_iterator_tag
{
};
structint_not_an_iterator_tag
{
};
template <typename Iterator>
structiterator_traits
{
typedeftypename Iterator::difference_type difference_type;
typedeftypename Iterator::value_type value_type;
typedeftypename Iterator::pointer pointer;
typedeftypename Iterator::reference reference;
typedeftypename Iterator::iterator_category iterator_category;
};
template <typename T>
structiterator_traits<T*>
{
typedefptrdiff_t difference_type;
typedef T value_type;
typedef T* pointer;
typedef T& reference;
typedef random_access_iterator_tag iterator_category;
};
template <typename T>
structiterator_traits<const T*>
{
typedefptrdiff_t difference_type;
typedef T value_type;
typedefconst T* pointer;
typedefconst T& reference;
typedef random_access_iterator_tag iterator_category;
};
template<>
structiterator_traits<bool>
{
typedef int_not_an_iterator_tag iterator_category;
};
template<>
structiterator_traits<char>
{
typedef int_not_an_iterator_tag iterator_category;
};
template<>
structiterator_traits<signedchar>
{
typedef int_not_an_iterator_tag iterator_category;
};
template<>
structiterator_traits<unsignedchar>
{
typedef int_not_an_iterator_tag iterator_category;
};
template<>
structiterator_traits<short>
{
typedef int_not_an_iterator_tag iterator_category;
};
template<>
structiterator_traits<unsignedshort>
{
typedef int_not_an_iterator_tag iterator_category;
};
template<>
structiterator_traits<int>
{
typedef int_not_an_iterator_tag iterator_category;
};
template<>
structiterator_traits<unsignedint>
{
typedef int_not_an_iterator_tag iterator_category;
};
template<>
structiterator_traits<__int64>
{
typedef int_not_an_iterator_tag iterator_category;
};
template<>
structiterator_traits<unsigned __int64>
{
typedef int_not_an_iterator_tag iterator_category;
};
namespaceutil
{
template<classIterator>
inline
typename iterator_traits<Iterator>::iterator_category
iterator_category(const Iterator&)
{
typename iterator_traits<Iterator>::iterator_category categ;
return categ;
}
} // end of namespace util.
} // end of namespace jitstd.
