Class json_reverse_iterator

Source/external/json.hpp:13586–13669

*/
template<typename Base>
class json_reverse_iterator : public std::reverse_iterator<Base>
{
  public:
	using difference_type = std::ptrdiff_t;
	/// shortcut to the reverse iterator adapter
	using base_iterator = std::reverse_iterator<Base>;
	/// the reference type for the pointed-to element
	using reference = typename Base::reference;

	/// create reverse iterator from iterator
	explicit json_reverse_iterator(const typename base_iterator::iterator_type& it) noexcept
		: base_iterator(it) {}

	/// create reverse iterator from base class
	explicit json_reverse_iterator(const base_iterator& it) noexcept : base_iterator(it) {}

	/// post-increment (it++)
	json_reverse_iterator operator++(int)& // NOLINT(cert-dcl21-cpp)
	{
		return static_cast<json_reverse_iterator>(base_iterator::operator++(1));
	}

	/// pre-increment (++it)
	json_reverse_iterator& operator++()
	{
		return static_cast<json_reverse_iterator&>(base_iterator::operator++());
	}

	/// post-decrement (it--)
	json_reverse_iterator operator--(int)& // NOLINT(cert-dcl21-cpp)
	{
		return static_cast<json_reverse_iterator>(base_iterator::operator--(1));
	}

	/// pre-decrement (--it)
	json_reverse_iterator& operator--()
	{
		return static_cast<json_reverse_iterator&>(base_iterator::operator--());
	}

	/// add to iterator
	json_reverse_iterator& operator+=(difference_type i)
	{
		return static_cast<json_reverse_iterator&>(base_iterator::operator+=(i));
	}

	/// add to iterator
	json_reverse_iterator operator+(difference_type i) const
	{
		return static_cast<json_reverse_iterator>(base_iterator::operator+(i));
	}

	/// subtract from iterator
	json_reverse_iterator operator-(difference_type i) const
	{
		return static_cast<json_reverse_iterator>(base_iterator::operator-(i));
	}