posix::stream_descriptor::operator=

Move-assign a posix::stream_descriptor from another.

stream_descriptor & operator=(
    stream_descriptor && other);

This assignment operator moves a stream descriptor from one object to another.

other: The other posix::stream_descriptor object from which the move will occur.

Following the move, the moved-from object is in the same state as if constructed using the stream_descriptor(io_context&) constructor.