Re: ELPA submission: drepl (REPL protocol)

[Philip Kaludercic <philipk@posteo.net>]

Augusto Stoffel <arstoffel@gmail.com> writes:

> On Tue, 31 Oct 2023 at 09:08, Philip Kaludercic wrote:
>
>> The idea seems interesting, I'll have to try it out at some point
>> (though I don't really use Python or Lua much, so I hope you plan to add
>> more languages in the future).

> Sure, let me know if you have any ideas.  A good candidate, as I
> mention in the readme, would be a language that has a good embeddable
> REPL library that you hack into (as opposed to a program where the
> REP-loop is more or less hardcoded).

What does a REPL library need, that most languages couldn't implement
themselves if they have an eval function?

>>  (cl-defgeneric drepl--command (repl)
>>    "The command to start the REPL interpreter as a list of strings."
>>    (ignore repl)
>> -  (error "This needs an implementation"))
>> +  (error "This needs an implementation")) ;Mention what "this" is
>
> _This_ is the method.  This is one of the two things that cannot have a
> default implementation and should be implemented by every subclass :-).
> Is the message confusing?

I am just imagining an error message appearing in the mini buffer saying
"This needs an implementation", without an indication where the error is
coming from.