From: Matt Wette <matt.wette@gmail.com>
To: Arun Isaac <arunisaac@systemreboot.net>
Cc: Guile User <guile-user@gnu.org>
Subject: Re: Anaphoric macros like when-let
Date: Sat, 26 Aug 2017 12:50:46 -0700 [thread overview]
Message-ID: <12D2B2C2-41A5-4F66-98DB-7F7A5AF0C819@gmail.com> (raw)
In-Reply-To: <1a0f67f3.AEAAO93SX5gAAAAAAAAAAAPWCvIAAAACwQwAAAAAAAW9WABZodBb@mailjet.com>
> On Aug 26, 2017, at 12:47 PM, Arun Isaac <arunisaac@systemreboot.net> wrote:
>
>
> Is there a Scheme or Guile equivalent to Emacs Lisp's `when-let' ?
>
> Basically, I'm looking for a shorthand to express this:
>
> (let ((x (foo))
> (when x
> (bar x))))
>
> as this:
>
> (when-let (x (foo))
> (bar x))
>
(use-modules (srfi srfi-2))
(and-let* ((x foo))
(bar x))
next prev parent reply other threads:[~2017-08-26 19:50 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-26 19:47 Anaphoric macros like when-let Arun Isaac
2017-08-26 19:50 ` Matt Wette [this message]
2017-08-26 19:54 ` Matt Wette
2017-08-27 12:28 ` Arun Isaac
2017-08-26 22:40 ` Kyle Siehl
2017-08-27 20:24 ` Mark H Weaver
2017-08-28 9:41 ` Arun Isaac
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