Re: Adding another "let ... in"-like construct for fontification/indentation

[Philippe Wang <lists@philippewang.info>]

Denis Bueno wrote:
> All,
>
> In tuareg-mode, is there a simple way to add support for indentation
> for a new syntactic construct that behaves exactly like "let ... in
> ..."?  I'd like "def ... in ..." to behave the same way.  I'm thinking
> of some code I can stuff in my .emacs, hopefuly, as opposed to a
> modification of tuareg.el.
>
> I'd like to be able to write:
>
>    let foo a b = a + b in
>    def hi(x) = print_int x; 0 in
>    let bar x = x in
>      <some body where foo and hi are in scope>
>
> i.e. I'd like to interleave let .. in ... and def ... in ..., and have
> them cooperate.
>
> I looked around tuareg.el and found a bunch of places where "let" is
> mentioned in a regexp, and even found `tuareg-make-find-kwop-regexp',
> whose doc string says "Make a custom indentation regexp".  That doc
> string seems like it's what I want, but that function has no side
> effects, so clearly it's not the whole story.
>
> What I'm eventually shooting for is a tuareg mode that "knows" about
> Jocaml syntax, since I'm fiddling around with that for the moment.
> There are more new pieces of syntax on Jocaml (new keywords "spawn"
> and "reply to") which seem pretty simple to support, but I haven't
> thought about them very much.
>
> Thanks in advance.
>

Hi,

I sent the following text last week but, I don't know why, it got lost...


Well, I played a little bit with tuareg, to try to adapt it to JoCaml.
The keywords are well colored (well, I think they are), but the 
indentation is not finished (well, let's say it : it's wrong).

You can get what I have done if ever you are interested :
http://philippewang.info/cs/misc/juareg-mode-1.46.2.tar.gz

(there is in particular a bug : a function call finds nil... why why why 
is dynamic typing so mean with me...)

Well, I've spent only a few minutes on it, plus a few hours trying to 
catch bugs, most of which I haven't caught.

I have no idea if someone else is working on it, I just wanted to "play" 
with elisp...
But I don't have time to continue right now, that's the reason why I 
give you the sources.


Cheers,

Philippe Wang
 mail[at]philippewang.info

PS :
if ever you want to compare tuareg sources with juareg sources, I 
suggest you apply :
for i in * ; sed -i -e 's/juareg/tuareg/g' -e 's/jocaml/ocaml/g' $i ; done
on the sources first.
The advantage in naming it juareg instead of tuareg is that it can be 
used without interfering with tuareg.