boost::asio 序列19: basic_resolver

explicit basic_resolver(const executor_type& ex) 和   template <typename ExecutionContext>   explicit basic_resolver(ExecutionContext& context,       typename enable_if<         is_convertible<ExecutionContext&, execution_context&>::value       >::type* = 0) 和  basic_resolver(basic_resolver&& other) 和 basic_resolver& operator=(basic_resolver&& other)	創建basic_resolver
executor_type get_executor()	獲取執行器
void cancel()	取消異步操作
results_type resolve(const query& q)	域名解析
results_type resolve(const query& q, boost::system::error_code& ec)	ec: 表示錯誤信息
results_type resolve(BOOST_ASIO_STRING_VIEW_PARAM host,       BOOST_ASIO_STRING_VIEW_PARAM service)	host: 識別本機名稱的字符串 service:識別服務器的字符串
results_type resolve(BOOST_ASIO_STRING_VIEW_PARAM host,       BOOST_ASIO_STRING_VIEW_PARAM service, boost::system::error_code& ec)	同上， ec: 表示錯誤信息
results_type resolve(BOOST_ASIO_STRING_VIEW_PARAM host,       BOOST_ASIO_STRING_VIEW_PARAM service, resolver_base::flags resolve_flags)	resolve_flags: 確定如何名稱解析的標誌集合
results_type resolve(BOOST_ASIO_STRING_VIEW_PARAM host,       BOOST_ASIO_STRING_VIEW_PARAM service, resolver_base::flags resolve_flags,       boost::system::error_code& ec)	同上， ec: 表示錯誤信息
results_type resolve(const protocol_type& protocol,       BOOST_ASIO_STRING_VIEW_PARAM host, BOOST_ASIO_STRING_VIEW_PARAM service)	protocol: ipv4 或 ipv6
results_type resolve(const protocol_type& protocol,       BOOST_ASIO_STRING_VIEW_PARAM host, BOOST_ASIO_STRING_VIEW_PARAM service,       boost::system::error_code& ec)	同上， ec: 表示錯誤信息
results_type resolve(const protocol_type& protocol,       BOOST_ASIO_STRING_VIEW_PARAM host, BOOST_ASIO_STRING_VIEW_PARAM service,       resolver_base::flags resolve_flags)	-
results_type resolve(const protocol_type& protocol,       BOOST_ASIO_STRING_VIEW_PARAM host, BOOST_ASIO_STRING_VIEW_PARAM service,       resolver_base::flags resolve_flags, boost::system::error_code& ec)	-
template <typename ResolveHandler>   BOOST_ASIO_INITFN_RESULT_TYPE(ResolveHandler,       void (boost::system::error_code, results_type))   async_resolve(const query& q,       BOOST_ASIO_MOVE_ARG(ResolveHandler) handler)	Handler類型: void handler(const boost::system::error_code& error, resolver::results_type results );
template <typename ResolveHandler>   BOOST_ASIO_INITFN_RESULT_TYPE(ResolveHandler,       void (boost::system::error_code, results_type))   async_resolve(BOOST_ASIO_STRING_VIEW_PARAM host,       BOOST_ASIO_STRING_VIEW_PARAM service,       BOOST_ASIO_MOVE_ARG(ResolveHandler) handler)
template <typename ResolveHandler>   BOOST_ASIO_INITFN_RESULT_TYPE(ResolveHandler,       void (boost::system::error_code, results_type))   async_resolve(BOOST_ASIO_STRING_VIEW_PARAM host,       BOOST_ASIO_STRING_VIEW_PARAM service,       resolver_base::flags resolve_flags,       BOOST_ASIO_MOVE_ARG(ResolveHandler) handler)
template <typename ResolveHandler>   BOOST_ASIO_INITFN_RESULT_TYPE(ResolveHandler,       void (boost::system::error_code, results_type))   async_resolve(const protocol_type& protocol,       BOOST_ASIO_STRING_VIEW_PARAM host, BOOST_ASIO_STRING_VIEW_PARAM service,       BOOST_ASIO_MOVE_ARG(ResolveHandler) handler)	異步域名解析
template <typename ResolveHandler>   BOOST_ASIO_INITFN_RESULT_TYPE(ResolveHandler,       void (boost::system::error_code, results_type))   async_resolve(const protocol_type& protocol,       BOOST_ASIO_STRING_VIEW_PARAM host, BOOST_ASIO_STRING_VIEW_PARAM service,       resolver_base::flags resolve_flags,       BOOST_ASIO_MOVE_ARG(ResolveHandler) handler)	異步域名解析
results_type resolve(const endpoint_type& e)	反域名解析
results_type resolve(const endpoint_type& e, boost::system::error_code& ec)	反域名解析
template <typename ResolveHandler>   BOOST_ASIO_INITFN_RESULT_TYPE(ResolveHandler,       void (boost::system::error_code, results_type))   async_resolve(const endpoint_type& e,       BOOST_ASIO_MOVE_ARG(ResolveHandler) handler)	反域名解析