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From: Juanma Barranquero <lekktu@gmail.com>
To: Josh <josh@foxtail.org>
Cc: fgallina@gnu.org, emacs-devel <emacs-devel@gnu.org>
Subject: Re: Sweeter Emacs Lisp
Date: Sun, 14 Jul 2013 19:18:09 +0200	[thread overview]
Message-ID: <CAAeL0SS-viuZdM3dPPdMvqwK1-kjH9-mqiUYWz9H5rMBYa-_0w@mail.gmail.com> (raw)
In-Reply-To: <CANdFEAFixF+LtZXDgj3=z7i7FA00uqudt9iCCdf_4EQo2ZNjag@mail.gmail.com>

On Sun, Jul 14, 2013 at 7:14 PM, Josh <josh@foxtail.org> wrote:

> but that canonical versions of such generally useful
> functionality should be incorporated into the core where people could
> find and use them.

Certainly. aif/awhen/when-let/if-let is so useful that it surely has
been reimplemented a billion times. I have this in my .emacs

(cl-defmacro whereas ((var test) &rest body)
  "If TEST is non-nil, bind VAR to it and then run BODY.
Return the value returned by the last form in BODY.
Else, return nil.
\n(fn (VAR TEST) &rest BODY)"
  (declare (indent 1) (debug ((sexp form) body)))
  `(let ((,var ,test))
     (when ,var ,@body)))

(I don't know where the "whereas" name originated, but I know I copied
it from somewhere.)



  reply	other threads:[~2013-07-14 17:18 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-07-14  2:22 Sweeter Emacs Lisp fgallina
2013-07-14 11:36 ` Dmitry Gutov
2013-07-14 11:53   ` Vitalie Spinu
2013-07-14 12:38     ` Aurélien Aptel
2013-07-14 13:25     ` Xue Fuqiao
2013-07-14 14:16     ` Pascal J. Bourguignon
2013-07-14 14:22 ` Lars Magne Ingebrigtsen
2013-07-14 16:27   ` Juanma Barranquero
2013-07-14 19:43     ` Lars Magne Ingebrigtsen
2013-07-15  3:20   ` Dmitry Gutov
2013-07-15  5:03     ` Stephen J. Turnbull
2013-07-16 20:23       ` Dmitry Gutov
2013-07-17 14:04         ` Lars Magne Ingebrigtsen
2013-07-17 15:07           ` Dmitry Gutov
2013-07-16  2:15   ` Miles Bader
2013-07-16  9:12     ` Stefan Monnier
2013-07-14 16:18 ` Josh
2013-07-14 16:30   ` Juanma Barranquero
2013-07-14 17:14     ` Josh
2013-07-14 17:18       ` Juanma Barranquero [this message]
2013-07-15  6:05         ` Lars Brinkhoff
2013-07-15  7:04   ` Stefan Monnier
2013-07-15 13:30     ` Bozhidar Batsov
2013-07-16  2:26       ` Miles Bader
2013-07-16  6:08         ` Thien-Thi Nguyen
2013-07-16 14:07           ` Drew Adams
2013-07-16  9:11       ` Stefan Monnier
2013-07-14 17:24 ` Andreas Schwab
2013-07-16  2:13 ` Miles Bader
2013-07-16  6:14   ` Stephen J. Turnbull
2013-07-16  9:07   ` Stefan Monnier
2013-07-16 11:09     ` Juanma Barranquero
2013-07-16 12:25       ` Andreas Schwab
2013-07-16 13:04         ` Thierry Volpiatto
2013-07-16 13:42         ` Juanma Barranquero
2013-07-16 14:38           ` Andreas Schwab
2013-07-16 14:42             ` Juanma Barranquero
2013-07-16 20:57       ` Stefan Monnier
2013-07-22 15:24 ` Stefan Monnier
2013-07-22 16:33   ` Thien-Thi Nguyen
2013-07-22 21:04     ` Stefan Monnier
2013-07-23  4:37       ` Thien-Thi Nguyen
2013-08-10  2:52         ` Stefan Monnier
2013-08-10 10:08         ` Pascal J. Bourguignon
2013-08-10 16:27           ` Drew Adams

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