Writing Emacs extensions in languages other than Lisp

Question

I'd like to take an existing application (written in OCaml) and create an Emacs "interface" for it (like, for example, the Emacs GDB mode). I would prefer to do this without writing a ton of Lisp code. In MVC terms, I'd like for the View to be Emacs, but for the Model and Controller to remain (primarily) OCaml.

Does anybody know of a way to write Emacs extensions in a language other than Lisp? This could either take the form of bindings to the Emacs extension API in some other language (e.g., making OCaml a first-class Emacs extension language) or an Emacs interaction mode where, for example, the extension has a pipe into which it can write Emacs Lisp expressions and read out result values.

Answer 1

http://www.emacswiki.org/cgi-bin/emacs-en?CategoryExtensionLanguage is a list of all non-Elisp extension languages you can use.

It does appear to be dynamic language centric.

http://common-lisp.net/project/slime/ is missing from that list, as it is not quite an extension language, but an Elisp-Common Lisp bridge. Its source code would show how to communicate back and forth over sockets.

A similar IDE for Erlang is Distel, at http://fresh.homeunix.net/~luke/distel/ (currently down) and https://github.com/massemanet/distel.

Good luck!