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Construct a signal set and add one signal.
template< typename ExecutionContext> basic_signal_set( ExecutionContext & context, int signal_number_1, typename constraint< is_convertible< ExecutionContext &, execution_context & >::value, defaulted_constraint >::type = defaulted_constraint());
This constructor creates a signal set and registers for one signal.
An execution context which provides the I/O executor that the signal set will use, by default, to dispatch handlers for any asynchronous operations performed on the signal set.
The signal number to be added.
This constructor is equivalent to performing:
asio::signal_set signals(context); signals.add(signal_number_1);