66 lines
1.4 KiB
Plaintext
66 lines
1.4 KiB
Plaintext
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/ Copyright (c) 2003-2023 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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/
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/ Distributed under the Boost Software License, Version 1.0. (See accompanying
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/ file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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/]
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[section:LegacyCompletionHandler Legacy completion handler requirements]
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A legacy completion handler must meet the requirements for a [link
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boost_asio.reference.Handler handler]. A legacy completion handler must meet the
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requirements of `CopyConstructible` types (C++Std [copyconstructible]). A value
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`h` of a completion handler class should work correctly in the expression
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`h()`.
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[heading Examples]
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A free function as a completion handler:
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void completion_handler()
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{
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...
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}
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A completion handler function object:
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struct completion_handler
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{
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...
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void operator()()
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{
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...
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}
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...
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};
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A lambda as a completion handler:
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my_io_service.post(
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[]()
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{
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...
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});
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A non-static class member function adapted to a completion handler using
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`std::bind()`:
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void my_class::completion_handler()
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{
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...
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}
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...
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my_io_service.post(std::bind(&my_class::completion_handler, this));
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A non-static class member function adapted to a completion handler using
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`boost::bind()`:
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void my_class::completion_handler()
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{
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...
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}
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...
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my_io_service.post(boost::bind(&my_class::completion_handler, this));
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[endsect]
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