...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
An accept handler must meet the requirements for a handler.
A value h
of an accept handler class should work correctly in
the expression h(ec)
, where ec
is an lvalue of
type const error_code
.
A free function as an accept handler:
void accept_handler( const boost::system::error_code& ec) { ... }
An accept handler function object:
struct accept_handler { ... void operator()( const boost::system::error_code& ec) { ... } ... };
A lambda as an accept handler:
acceptor.async_accept(..., [](const boost::system::error_code& ec) { ... });
A non-static class member function adapted to an accept handler using std::bind()
:
void my_class::accept_handler( const boost::system::error_code& ec) { ... } ... acceptor.async_accept(..., std::bind(&my_class::accept_handler, this, std::placeholders::_1));
A non-static class member function adapted to an accept handler using boost::bind()
:
void my_class::accept_handler( const boost::system::error_code& ec) { ... } ... acceptor.async_accept(..., boost::bind(&my_class::accept_handler, this, boost::asio::placeholders::error));