A resolve token is a completion
token for completion signature void(error_code, ip::basic_resolver_results<InternetProtocol>)
,
for a specified InternetProtocol
.
A free function as a resolve token:
void resolve_handler( const asio::error_code& ec, asio::ip::tcp::resolver::results_type results) { ... }
A resolve token function object:
struct resolve_handler { ... void operator()( const asio::error_code& ec, asio::ip::tcp::resolver::results_type results) { ... } ... };
A lambda as a resolve token:
resolver.async_resolve(..., [](const asio::error_code& ec, asio::ip::tcp::resolver::results_type results) { ... });
A non-static class member function adapted to a resolve token using std::bind()
:
void my_class::resolve_handler( const asio::error_code& ec, asio::ip::tcp::resolver::results_type results) { ... } ... resolver.async_resolve(..., std::bind(&my_class::resolve_handler, this, std::placeholders::_1, std::placeholders::_2));
A non-static class member function adapted to a resolve token using boost::bind()
:
void my_class::resolve_handler( const asio::error_code& ec, asio::ip::tcp::resolver::results_type results) { ... } ... resolver.async_resolve(..., boost::bind(&my_class::resolve_handler, this, asio::placeholders::error, asio::placeholders::results));
Using use_future as a resolve token:
std::future<asio::ip::tcp::resolver::results_type> f = resolver.async_resolve(..., asio::use_future); ... try { asio::ip::tcp::resolver::results_type r = f.get(); ... } catch (const system_error& e) { ... }
Using use_awaitable as a resolve token:
asio::awaitable<void> my_coroutine() { try { ... asio::ip::tcp::resolver::results_type r = co_await resolver.async_resolve( ..., asio::use_awaitable); ... } catch (const system_error& e) { ... } }