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iterator.hpp
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iterator.hpp
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#pragma once
#include <iterator>
namespace ctl {
template<typename T>
class Iterator;
} // namespace ctl
template<typename T>
struct std::iterator_traits< ctl::Iterator<T> >
{
using difference_type = std::ptrdiff_t;
using value_type = T;
using pointer = T*;
using reference = T&;
using iterator_category = std::random_access_iterator_tag;
};
namespace ctl {
/**
* ctl::Iterator Definition
*/
template<typename T>
class Iterator //: public std::iterator<std::random_access_iterator_tag, T>
{
public:
using traits = typename std::iterator_traits< ctl::Iterator<T> >;
using difference_type = typename traits::difference_type;
using value_type = typename traits::value_type;
using pointer = typename traits::pointer;
using reference = typename traits::reference;
using iterator_category = typename traits::iterator_category;
Iterator() : ptr(nullptr) {}
Iterator(const Iterator& other) : ptr(other.ptr) {}
Iterator(Iterator&& other) : ptr( std::move(other.ptr) ) {}
Iterator(const typename std::iterator_traits< Iterator<T> >::pointer& ptr) : ptr(ptr) {}
virtual ~Iterator() = default;
Iterator& operator=(const Iterator&);
Iterator& operator++();
Iterator& operator--();
Iterator operator++(int);
Iterator operator--(int);
Iterator& operator+=(difference_type);
Iterator& operator-=(difference_type);
Iterator operator+(difference_type) const;
Iterator operator-(difference_type) const;
difference_type operator-(const Iterator&) const;
reference operator[](difference_type) const;
reference operator*() const;
pointer operator->() const;
bool operator==(const Iterator&) const;
bool operator!=(const Iterator&) const;
bool operator<=(const Iterator&) const;
bool operator>=(const Iterator&) const;
bool operator<(const Iterator&) const;
bool operator>(const Iterator&) const;
private:
pointer ptr;
};
/**
* ctl::Iterator Implementation
*/
template<typename T>
Iterator<T>& Iterator<T>::operator=(const Iterator& other)
{
ptr = other.ptr;
return *this;
}
template<typename T>
Iterator<T>& Iterator<T>::operator++()
{
++ptr;
return *this;
}
template<typename T>
Iterator<T>& Iterator<T>::operator--()
{
--ptr;
return *this;
}
template<typename T>
Iterator<T> Iterator<T>::operator++(int)
{
Iterator foo(*this);
++ptr;
return foo;
}
template<typename T>
Iterator<T> Iterator<T>::operator--(int)
{
Iterator foo(*this);
--ptr;
return foo;
}
template<typename T>
Iterator<T>& Iterator<T>::operator+=(difference_type n)
{
ptr += n;
return *this;
}
template<typename T>
Iterator<T>& Iterator<T>::operator-=(difference_type n)
{
ptr -= n;
return *this;
}
template<typename T>
typename Iterator<T>::difference_type Iterator<T>::operator-(const Iterator& other) const
{
return ptr - other.ptr;
}
template<typename T>
Iterator<T> Iterator<T>::operator+(difference_type n) const
{
return Iterator(ptr + n);
}
template<typename T>
Iterator<T> Iterator<T>::operator-(difference_type n) const
{
return Iterator(ptr - n);
}
template<typename T>
typename Iterator<T>::reference Iterator<T>::operator[](difference_type i) const
{
return ptr[i];
}
template<typename T>
typename Iterator<T>::reference Iterator<T>::operator*() const
{
return *ptr;
}
template<typename T>
typename Iterator<T>::pointer Iterator<T>::operator->() const
{
return ptr;
}
template<typename T>
bool Iterator<T>::operator==(const Iterator& other) const
{
return ptr == other.ptr;
}
template<typename T>
bool Iterator<T>::operator!=(const Iterator& other) const
{
return !(*this == other);
}
template<typename T>
bool Iterator<T>::operator<=(const Iterator& other) const
{
return ptr <= other.ptr;
}
template<typename T>
bool Iterator<T>::operator>=(const Iterator& other) const
{
return ptr >= other.ptr;
}
template<typename T>
bool Iterator<T>::operator<(const Iterator& other) const
{
return ptr < other.ptr;
}
template<typename T>
bool Iterator<T>::operator>(const Iterator& other) const
{
return ptr > other.ptr;
}
} // namespace ctl