From: Shigeru Fukaya <shigeru.fukaya@gmail.com>
To: 17475@debbugs.gnu.org
Subject: bug#17475: 24.3.91; bug of byte-optimize-zerop
Date: Tue, 13 May 2014 00:11:11 +0900 [thread overview]
Message-ID: <25CF6DF4691984shigeru.fukaya@gmail.com> (raw)
`byte-optimize-zerop' is badly implemented. Even when
`byte-compile-delete-errors' is non-nil, bute-compiled code may
signal an error.
(= FORM 0) and (zerop FORM) are functionally equal, besides, the
former is better when byte-compiled.
The following is the poor alternative.
I can't make a smart code without creating a new function.
(defun byte-optimize-zerop (form)
(cond ((numberp (nth 1 form))
(eval form))
(byte-compile-delete-errors
`(and (member ,(nth 1 form) (quote 0 0.0))) t)
((list '= (nth 1 form) 0))))
-- Shigeru
next reply other threads:[~2014-05-12 15:11 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-12 15:11 Shigeru Fukaya [this message]
2014-05-16 21:11 ` bug#17475: 24.3.91; bug of byte-optimize-zerop Shigeru Fukaya
2014-05-20 18:32 ` Stefan Monnier
2014-05-28 0:51 ` Stefan Monnier
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