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Re: emacs lisp syntax rfc: (cond (EXPR => (lambda (X) ...)))
From: |
Thien-Thi Nguyen |
Subject: |
Re: emacs lisp syntax rfc: (cond (EXPR => (lambda (X) ...))) |
Date: |
Tue, 04 Jan 2011 18:00:57 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux) |
() Stefan Monnier <address@hidden>
() Sun, 02 Jan 2011 21:19:44 -0500
The only problem I can see with it is that it relies on a
function call, which is a slow operation in the current Elisp
implementation.
Perhaps the compiler can optimize
(EXPR => (lambda (VAR) BODY))
to be
(let ((VAR EXPR))
(when VAR
;; book-keeping to mark ‘cond’ success,
;; to preclude next clause, here.
BODY))
?
- emacs lisp syntax rfc: (cond (EXPR => (lambda (X) ...))), Thien-Thi Nguyen, 2011/01/02
- Re: emacs lisp syntax rfc: (cond (EXPR => (lambda (X) ...))), Stefan Monnier, 2011/01/02
- Re: emacs lisp syntax rfc: (cond (EXPR => (lambda (X) ...))),
Thien-Thi Nguyen <=
- Re: emacs lisp syntax rfc: (cond (EXPR => (lambda (X) ...))), Richard Stallman, 2011/01/03
- Re: emacs lisp syntax rfc: (cond (EXPR => (lambda (X) ...))), Stefan Monnier, 2011/01/05
- Re: emacs lisp syntax rfc: (cond (EXPR => (lambda (X) ...))), Harald Hanche-Olsen, 2011/01/05
- Re: emacs lisp syntax rfc: (cond (EXPR => (lambda (X) ...))), Stefan Monnier, 2011/01/05
- Re: emacs lisp syntax rfc: (cond (EXPR => (lambda (X) ...))), Helmut Eller, 2011/01/06