Method binary_writer

Source/external/json.hpp:14966–14969

! @brief create a binary writer @param[in] adapter output adapter to write to */

	@param[in] adapter  output adapter to write to
	*/
	explicit binary_writer(output_adapter_t<CharType> adapter) : oa(std::move(adapter))
	{
		JSON_ASSERT(oa);
	}

	/*!
	@param[in] j  JSON value to serialize