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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
namespace jitstd
{
template <class Category, class T, class Distance = ptrdiff_t, class Pointer = T*, class Reference = T&>
struct iterator
{
typedef T value_type;
typedef Distance difference_type;
typedef Pointer pointer;
typedef Reference reference;
typedef Category iterator_category;
};
struct input_iterator_tag
{
};
struct forward_iterator_tag : public input_iterator_tag
{
};
struct bidirectional_iterator_tag : public forward_iterator_tag
{
};
struct random_access_iterator_tag : public bidirectional_iterator_tag
{
};
struct int_not_an_iterator_tag
{
};
template <typename Iterator>
struct iterator_traits
{
typedef typename Iterator::difference_type difference_type;
typedef typename Iterator::value_type value_type;
typedef typename Iterator::pointer pointer;
typedef typename Iterator::reference reference;
typedef typename Iterator::iterator_category iterator_category;
};
template <typename T>
struct iterator_traits<T*>
{
typedef ptrdiff_t difference_type;
typedef T value_type;
typedef T* pointer;
typedef T& reference;
typedef random_access_iterator_tag iterator_category;
};
template <typename T>
struct iterator_traits<const T*>
{
typedef ptrdiff_t difference_type;
typedef T value_type;
typedef const T* pointer;
typedef const T& reference;
typedef random_access_iterator_tag iterator_category;
};
template<>
struct iterator_traits<bool>
{
typedef int_not_an_iterator_tag iterator_category;
};
template<>
struct iterator_traits<char>
{
typedef int_not_an_iterator_tag iterator_category;
};
template<>
struct iterator_traits<signed char>
{
typedef int_not_an_iterator_tag iterator_category;
};
template<>
struct iterator_traits<unsigned char>
{
typedef int_not_an_iterator_tag iterator_category;
};
template<>
struct iterator_traits<short>
{
typedef int_not_an_iterator_tag iterator_category;
};
template<>
struct iterator_traits<unsigned short>
{
typedef int_not_an_iterator_tag iterator_category;
};
template<>
struct iterator_traits<int>
{
typedef int_not_an_iterator_tag iterator_category;
};
template<>
struct iterator_traits<unsigned int>
{
typedef int_not_an_iterator_tag iterator_category;
};
template<>
struct iterator_traits<__int64>
{
typedef int_not_an_iterator_tag iterator_category;
};
template<>
struct iterator_traits<unsigned __int64>
{
typedef int_not_an_iterator_tag iterator_category;
};
namespace util
{
template<class Iterator>
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.
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