Re: Emacs design and architecture

[Dmitry Gutov]

On 18/09/2023 03:11, Po Lu wrote:
> Dmitry Gutov<dmitry@gutov.dev>  writes:
>
> > On 17/09/2023 09:43, Po Lu wrote:
> > > Immanuel Litzroth<immanuel.litzroth@gmail.com>   writes:
> > >
> > > > I don't understand this remark. When you talk about "the language
> > > > used
> > > > to implement emacs" are you talking about C or elisp?
> > > C, of course.
> > >
> > > > What is the LibreOffice extension language that is "almost the
> > > > same"?
> > > > Can you provide a link?
> > > LibreOffice is written in C++.  And it is programmable, by virtue of
> > > its
> > > nature as a computer program.
> > Scriptable programs have their specific challenges, so it's helpful to
> > look at architectures suited to that.
> Given that we don't "script" the Emacs display process itself, there is
> truly no distinction between a "scriptable" display engine and others.

We do: just as others have noted, redisplay calls back into Lisp. Which 
allows us to implement jit-lock with language-specific logic written in 
Lisp.

It has for a long time been the method by which we manage to do syntax 
highlighting with adequate performance even in large files.