Re: Scheme Interpreter in Emacs and Readline

[Po Lu]

Jakub Jankiewicz <address@hidden> writes:

>> What do you mean by "when I resize the window or frame it keep adding
>> prompt to the prompt line"?
>
> I have prompt "lips> " and when I resize Emacs window on Fedora GNU/Linux
> (the only system I was testing this). on each resize I get new prompt so when
> I keep resizing I have something like this:
>
> lips> lips> lips> lips> lips>
>
> and they are all prompt because I can't delete it. Unless something wierd is
> happening.
>
>> It would also probbaly be helpful if you could post the source of your
>> Scheme interpreter.
>
> Sorry about that, my Scheme Interpreter is here:
>
> https://github.com/jcubic/lips/tree/devel
>
> Please use devel branch since it's most up to date, I still try to make it
> compatible with R5RS, before I release new version, it will 1.0.
>
> The executable is in bin directry (there are not much code, but it would be
> easier to have link that you can run insead of send this to the mailing list.
>
> https://github.com/jcubic/lips/blob/devel/bin/lips.js
>
> Just run:
>
>       git clone https://github.com/jcubic/lips.git
>       cd lips
>       git checkout devel
>
> and run in GUI Emacs:
>
>       (run-scheme "<PATH>/lips/bin/lips.js")
>
> and resize the Frame or buffer's window if you have multiple windows.
>
>
> And I need to add that I was looking at Node.js source code, there is lot of
> code but it also use Readline and Node.js works in run-js (I'm not sure if it
> use something else for --interactive option that was suggested when I've
> search how to run node in Emacs).
>
> I've tested my interpeter with same run-js and I have same issue with
> duplicated prompt.
>
> --
> Jakub Jankiewicz, Web Developer
> https://jcubic.pl/me

I'm not sure about run-js, but I turned off Readline in your
interpreter, and it now works flawlessly inside comint.  Since Readline
is pretty much useless anyways there, it might be worth it to turn it
off inside Emacs. (ie check the EMACS and INSIDE_EMACS variables, or add
something like CMU's `-emacs' flag.)

Bash does the same thing too;
https://lists.gnu.org/archive/html/bug-bash/2015-03/msg00179.html