How cancel a message in Io's REPL without leaving the REPL?

[halloleo]

I'm using Io's REPL to get more familiar with the language.

When I issue a loop which - by accident - doesn't have a break condition, I have to stop the loop somehow.

Say, I issue in its simplest way

loop("foo" println)

How can I stop the loop with the keyboard without killing the whole REPL?

Ctrl-C stops the loop, but kills normally the REPL as well. Is there a way to stay in Io's REPL after Ctrl-C?

[ales-tsurko]

AFAIK, this is not implemented by default. But you can add your own system interrupt handler by implementing System userInterruptHandler.

[stevedekorte]

Now I understand why python has control-c and control-d. I guess it would be nice if Io worked the same way.

[halloleo]

Hey, so glad to get a response. :-) Tried to hang out on IRC #io, but something most have gone wrong...

@ales-tsurko System userInterruptHandler looks cool! Is there way to print its current method implementation in the Io repl? (I think I saw something like this in the doco, but now I cannot find it!)

[ales-tsurko]

Here we go:

Io> System getSlot("userInterruptHandler") code
==> method(writeln("\n  current coroutine") ;
Scheduler currentCoroutine showStack ;
Scheduler yieldingCoros foreach(coro, writeln("  coroutine ", coro label) ;
coro showStack) ;
self exit)
Io>

BTW, @stevedekorte how about adding an official chat on Discord or somewhere else?

[halloleo]

Thanks @ales-tsurko!

getSlot code was it!

Re official chat: What about a channel on gitter? It aligns well with GutHub and has some message history.

[stevedekorte]

There's a slack https://join.slack.com/t/iolanguage/shared_invite/zt-jgv7a478-onIqvPzhgUgDMOdqX5ChAw