| [/ |
| / Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
| / |
| / Distributed under the Boost Software License, Version 1.0. (See accompanying |
| / file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| /] |
| |
| [section:AcceptHandler Accept handler requirements] |
| |
| An accept handler must meet the requirements for a [link |
| asio.reference.Handler 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`. |
| |
| [heading Examples] |
| |
| A free function as an accept handler: |
| |
| void accept_handler( |
| const asio::error_code& ec) |
| { |
| ... |
| } |
| |
| An accept handler function object: |
| |
| struct accept_handler |
| { |
| ... |
| void operator()( |
| const asio::error_code& ec) |
| { |
| ... |
| } |
| ... |
| }; |
| |
| A lambda as an accept handler: |
| |
| acceptor.async_accept(..., |
| [](const asio::error_code& ec) |
| { |
| ... |
| }); |
| |
| A non-static class member function adapted to an accept handler using |
| `std::bind()`: |
| |
| void my_class::accept_handler( |
| const asio::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 asio::error_code& ec) |
| { |
| ... |
| } |
| ... |
| acceptor.async_accept(..., |
| boost::bind(&my_class::accept_handler, |
| this, asio::placeholders::error)); |
| |
| [endsect] |