pub async fn terminal(inbox: Receiver<Val>, back: Sender<Event>)Expand description
The interactive console: ('write v), ('line v) and ('read prompt) on
one peer, because ordering between printing and prompting is the whole
difficulty. Sharing one inbox makes the channel’s order the screen’s order;
two channels would let a print land mid-line. Reading a tty line blocks, so
a thread is occupied either way.
Registered under both stdout and stdin, so an object program says the
same thing whether its output is a terminal or a pipe.