Re: return

[Lars Magne Ingebrigtsen]

Miles Bader <address@hidden> writes:

> Doesn't every defun in CL establish a nil block?

No, it establishes a named block, so you can say

(defun foo ()
  (when zot
    (return-from foo
      t))
  ... stuff)

Which is kinda annoying, in my opinion.  Especially if you have long
function names and a lot of return-from forms.  Or you rename function
names...

But that's also an option if we think it's better not to confuse Common
Lisp peeps. 
  
> Of course one question is:  what about returns out of lambdas?
> Would/should they be supported, given that they need an entirely
> different mechanism internally?

Hm...  I haven't thought much about that, but my immediate feeling is
that a syntactically clearer return functionality isn't as necessary in
lambda forms as in defuns.  Lambda forms are (in practise) quite short
and sweet, in my experience.

-- 
(domestic pets only, the antidote for overdose, milk.)
  address@hidden * Lars Magne Ingebrigtsen