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A handshake token is a completion
token for completion signature void(error_code)
.
A free function as a handshake token:
void handshake_handler( const boost::system::error_code& ec) { ... }
A handshake token function object:
struct handshake_handler { ... void operator()( const boost::system::error_code& ec) { ... } ... };
A lambda as a handshake token:
ssl_stream.async_handshake(..., [](const boost::system::error_code& ec) { ... });
A non-static class member function adapted to a handshake token using std::bind()
:
void my_class::handshake_handler( const boost::system::error_code& ec) { ... } ... ssl_stream.async_handshake(..., std::bind(&my_class::handshake_handler, this, std::placeholders::_1));
A non-static class member function adapted to a handshake token using boost::bind()
:
void my_class::handshake_handler( const boost::system::error_code& ec) { ... } ... ssl_stream.async_handshake(..., boost::bind(&my_class::handshake_handler, this, boost::asio::placeholders::error));
Using use_future as a handshake token:
std::future<void> f = ssl_stream.async_handshake(..., boost::asio::use_future); ... try { f.get(); } catch (const system_error& e) { ... }
Using use_awaitable as a handshake token:
boost::asio::awaitable<void> my_coroutine() { try { ... co_await ssl_stream.async_handshake(..., boost::asio::use_awaitable); ... } catch (const system_error& e) { ... } }