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Mon, 25 Jun 2018 12:38:02 -0700
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On 06/23/2018 04:46 AM, Eli Zaretskii wrote:
From: Paul Pogonyshev <address@hidden>
Date: Sat, 23 Jun 2018 12:21:00 +0200
Another difference. In Emacs 24-26:
(format "%d" 0.9) => "0"
In Emacs 27:
(format "%d" 0.9) => "1"
This looks like the (unintended?) result of 80e145fc9.
I vaguely recall relying on the Elisp manual, which says that %d must be
applied only to integers, and I guess I figured the semantics didn't
matter so that the simplest implementation (thought that rounding and
keeping -0) would satisfy the doc and anyway would be more helpful than
truncating and discarding the sign of -0. But now that I reread the
manual I see that it says %d must signal an error when given a float,
which is obviously not the behavior, so the manual is wrong. And now
that this issue has come up I notice that 80e145fc9 caused %d to behave
inconsistently with %x; the latter truncates and converts -0 to 0
whereas the former rounds and keeps -0. This inconsistency is not good.
To try to improve this, I installed the attached into master to change
'format' to be more compatible with Emacs 26 etc. and am boldly closing
the bug report.
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