Re: Lexical binding and macros.

[Pascal J. Bourguignon]

Elena <egarrulo@gmail.com> writes:

> On Dec 15, 4:24 am, Stefan Monnier <monn...@iro.umontreal.ca> wrote:
>> >> ehm ... isn't "lexical-let" from the common lisp extension supposed to
>> >> support closures?
>> > They're not really closures.
>>
>> Actually, they are closures.  Admittedly, they're not as efficient as
>> one might like, but other than that, they work very well, thank you.
>>
>>         Stefan
>
> Do they still leak memory?  From http://c2.com/cgi/wiki?EmacsLisp :
>
> "Note that variables bound with lexical-let are never released, even
> if they are never used. Try
>
>  (loop for i from 1 to 100000 collect (lexical-let ((x i)) '()))
>
> and watch it eat memory.

Just wait till the garbage collector kicks in.
The variables are named by un-interned symbols.  The should be garbage
collected as soon as the 'closures' using them are collected.  In your
example, that's immediately, since no closure is created.

-- 
__Pascal Bourguignon__                     http://www.informatimago.com/
A bad day in () is better than a good day in {}.