Function operator[]

Source/external/json.hpp:13470–13502

! @brief access to successor @pre The iterator is initialized; i.e. `m_object != nullptr`. */

	@pre The iterator is initialized; i.e. `m_object != nullptr`.
	*/
	reference operator[](difference_type n) const
	{
		JSON_ASSERT(m_object != nullptr);

		switch (m_object->m_type)
		{
			case value_t::object:
				JSON_THROW(invalid_iterator::create(208, "cannot use operator[] for object iterators", m_object));

			case value_t::array:
				return *std::next(m_it.array_iterator, n);

			case value_t::null:
				JSON_THROW(invalid_iterator::create(214, "cannot get value", m_object));

			case value_t::string:
			case value_t::boolean:
			case value_t::number_integer:
			case value_t::number_unsigned:
			case value_t::number_float:
			case value_t::binary:
			case value_t::discarded:
			default:
			{
				if (JSON_HEDLEY_LIKELY(m_it.primitive_iterator.get_value() == -n))
				{
					return *m_object;
				}

				JSON_THROW(invalid_iterator::create(214, "cannot get value", m_object));
			}
		}
	}

	/*!
	@brief return the key of an object iterator