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Construct a descriptor on an existing native descriptor.
template<
typename ExecutionContext>
basic_descriptor(
ExecutionContext & context,
const native_handle_type & native_descriptor,
typename constraint< is_convertible< ExecutionContext &, execution_context & >::value >::type = 0);
This constructor creates a descriptor object to hold an existing native descriptor.
An execution context which provides the I/O executor that the descriptor will use, by default, to dispatch handlers for any asynchronous operations performed on the descriptor.
A native descriptor.
Thrown on failure.