Shinya Kitaoka 810553
#pragma once
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#ifndef TCG_PTR_WRAPPER
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#define TCG_PTR_WRAPPER
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// STD includes
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#include <iterator></iterator>
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namespace tcg
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{
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/*!
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  \brief    The ptr_wrapper class implements the basic functions necessary
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            to wrap a generic pointer object. The use case for this class
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            is to allow pointer inheritance.
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*/
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template <typename t=""></typename>
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class ptr
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{
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public:
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	typedef T *ptr_type;
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	typedef typename std::iterator_traits<ptr_type>::iterator_category iterator_category;</ptr_type>
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	typedef typename std::iterator_traits<ptr_type>::value_type value_type;</ptr_type>
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	typedef typename std::iterator_traits<ptr_type>::difference_type difference_type;</ptr_type>
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	typedef typename std::iterator_traits<ptr_type>::pointer pointer;</ptr_type>
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	typedef typename std::iterator_traits<ptr_type>::reference reference;</ptr_type>
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public:
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	explicit ptr(ptr_type p = ptr_type()) : m_ptr(p) {}
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	operator bool() const { return m_ptr; } // There should be no need to use
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											// the Safe Bool idiom
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	bool operator==(const ptr &other) const { return (m_ptr == other.m_ptr); }
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	bool operator!=(const ptr &other) const { return (m_ptr != other.m_ptr); }
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	bool operator<(const ptr &other) const { return (m_ptr < other.m_ptr); }
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	bool operator>(const ptr &other) const { return (m_ptr > other.m_ptr); }
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	bool operator<=(const ptr &other) const { return (m_ptr <= other.m_ptr); }
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	bool operator>=(const ptr &other) const { return (m_ptr >= other.m_ptr); }
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	ptr &operator++()
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	{
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		++m_ptr;
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		return *this;
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	}
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	ptr operator++(int) { return ptr(m_ptr++, *this); }
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	ptr &operator--()
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	{
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		--m_ptr;
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		return *this;
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	}
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	ptr operator--(int) { return ptr(m_ptr--, *this); }
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	ptr operator+(difference_type d) const { return ptr(m_ptr + d, *this); }
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	ptr &operator+=(difference_type d)
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	{
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		m_ptr += d;
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		return *this;
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	}
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	ptr operator-(difference_type d) const { return ptr(m_ptr - d, *this); }
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	ptr &operator-=(difference_type d)
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	{
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		m_ptr -= d;
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		return *this;
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	}
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	difference_type operator-(const ptr &other) const { return m_ptr - other.m_ptr; }
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	pointer operator->() const { return m_ptr; }
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	reference operator*() const { return *m_ptr; }
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	reference operator[](difference_type d) const { return m_ptr[d]; }
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protected:
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	ptr_type m_ptr;
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};
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//=======================================================
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template <typename t=""></typename>
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ptr<t> make_ptr(T *p) { return ptr<t>(p); }</t></t>
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} // namespace tcg
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#endif // TCG_PTR_WRAPPER