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50 lines
1.0 KiB
Plaintext
Executable File
50 lines
1.0 KiB
Plaintext
Executable File
[/
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/ Copyright (c) 2003-2022 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:CancellationHandler Cancellation handler requirements]
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A value `h` of a cancellation handler class should work correctly in the
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expression `h(t)`, where `t` is a value of type
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`boost::asio::cancellation_type`.
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[heading Examples]
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A free function as a cancellation handler:
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void cancellation_handler(
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boost::asio::cancellation_type type)
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{
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...
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}
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slot.assign(cancellation_handler);
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A cancellation handler function object:
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struct cancellation_handler
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{
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...
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void operator()(
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boost::asio::cancellation_type type)
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{
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...
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}
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...
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};
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cancellation_handler& h = slot.assign(cancellation_handler{ ... });
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A lambda as a cancellation handler:
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auto& h = slot.assign(
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[](boost::asio::cancellation_type type)
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{
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...
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});
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[endsect]
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