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From: | Mark Oteiza |
Subject: | bug#28254: 26.0.50; SRFI-2 and-let* |
Date: | Sun, 3 Sep 2017 21:13:56 -0400 |
User-agent: | Mutt/1.9.0 (2017-09-02) |
On 02/09/17 at 02:41pm, Noam Postavsky wrote:
On Sat, Sep 2, 2017 at 9:36 AM, Mark Oteiza <mvoteiza@udel.edu> wrote:This single tuple special case is troublesome IMO: (if-let* (x) "dogs" "cats") => "cats" (if-let* (x (y 2)) "dogs" "cats") => (void-function y) (if-let* (x (y 1) (z 2)) "dogs" "cats") => "cats" I'm curious if this was brought up in the old discussion when this was implemented.
FWIW, this was brought up in the original thread. https://lists.gnu.org/archive/html/emacs-devel/2014-08/msg00228.html IMO the original suggestion of having if-let and when-let be exclusively single binding, while the starred versions excluding the single binding special case would be more sane. P.S. I just realized I didn't copy the tuple part of if-let* into and-let* in the patch I just sent, and therefore missed the problem this special case causes in tests.
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