1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
[/
/ Copyright (c) 2003-2020 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:MoveAcceptHandler Move accept handler requirements]
A move accept handler must meet the requirements for a [link
boost_asio.reference.Handler handler]. A value `h` of a move accept handler class
should work correctly in the expression `h(ec, s)`, where `ec` is an lvalue of
type `const error_code` and `s` is an lvalue of the nested type
`Protocol::socket` for the type `Protocol` of the socket class template.
[heading Examples]
A free function as a move accept handler:
void accept_handler(
const boost::system::error_code& ec, boost::asio::ip::tcp::socket s)
{
...
}
A move accept handler function object:
struct accept_handler
{
...
void operator()(
const boost::system::error_code& ec, boost::asio::ip::tcp::socket s)
{
...
}
...
};
A lambda as a move accept handler:
acceptor.async_accept(...,
[](const boost::system::error_code& ec, boost::asio::ip::tcp::socket s)
{
...
});
A non-static class member function adapted to a move accept handler using
`std::bind()`:
void my_class::accept_handler(
const boost::system::error_code& ec, boost::asio::ip::tcp::socket socket)
{
...
}
...
boost::asio::async_accept(...,
std::bind(&my_class::accept_handler,
this, std::placeholders::_1,
std::placeholders::_2));
[endsect]
|
