Quoted lambda expressions

Quoted lambda expressions

[Xue Fuqiao]

Hi,

AFAIK "(function (lambda ...))" and "#'(lambda ...)" are the same as
"(lambda ...)", because in subr.el:

   (defmacro lambda (&rest cdr)
     [...]
     (list 'function (cons 'lambda cdr)))

But the first two forms are used 600+ times in lisp/ and 13 times in
doc/.  Does it make sense to do some cleanup?

(And some of them should not be changed, such as the one in "(elisp)
Anonymous Functions".)

-- 
Best regards, Xue Fuqiao.
http://www.gnu.org/software/emacs/

Re: Quoted lambda expressions

[Pascal J. Bourguignon]

Xue Fuqiao <xfq.free@gmail.com> writes:

> AFAIK "(function (lambda ...))" and "#'(lambda ...)" are the same as
> "(lambda ...)", because in subr.el:
>
>    (defmacro lambda (&rest cdr)
>      [...]
>      (list 'function (cons 'lambda cdr)))
>
> But the first two forms are used 600+ times in lisp/ and 13 times in
> doc/.  Does it make sense to do some cleanup?
>
> (And some of them should not be changed, such as the one in "(elisp)
> Anonymous Functions".)

That lambda macro was a late addition in the standardization of Common
Lisp.  I assume it was similarly late in emacs lisp.  That's the reason
why some lisp programmers use #'(lambda …) instead of (lambda …).

-- 
__Pascal Bourguignon__
http://www.informatimago.com/

Re: Quoted lambda expressions

[Andreas Schwab]

"Pascal J. Bourguignon" <pjb@informatimago.com> writes:

> I assume it was similarly late in emacs lisp.

It was added in 1992.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."