> I'm repeating my suggestion: extend the typing annotation (produced by -dtypes) to flag every tail recursive call, and have the emacs mode and ocamlbrowser display every tail call particularily (e.g. in a different color or font).
>
> This don't require any additional language construct.
>   
Oh, then we're cool.  :-D

> Also, tail recursion is IMHO a beginner's puzzle. I'm pretty sure every experimented Ocaml programmer does know inside his code what are his tail recursive calls.
>   
If you asked me to point them out, I could.  If you asked me if a given 
function is tail recursive, I could tell you.  I also use tail recursive 
calls unintentionally, and (while I realize now that you're not 
proposing this) I was concerned my code suddenly wouldn't compile 
because I didn't happen to tag a tail recursion.

Robert Fischer
IT Firefighter
Smokejumper Consulting