From: Paul Eggert <eggert@cs.ucla.edu>
To: Richard Lawrence <rwl@recursewithless.net>
Cc: 74689@debbugs.gnu.org
Subject: [bug#74689] [PATCH] Add predicates for decoded times and time deltas
Date: Sat, 28 Dec 2024 09:26:23 -0800 [thread overview]
Message-ID: <e6537a9d-3f74-46a0-9bbd-ef63d045f4c2@cs.ucla.edu> (raw)
In-Reply-To: <875xn3vm14.fsf@recursewithless.net>
On 12/28/24 07:56, Richard Lawrence wrote:
> I need to use
> `calendar-extract-month' with a plain date value, but
> `decoded-time-month' with a date-time value. I need type predicates to
> do such dispatching.
Not necessarily; you can instead try each function in turn and use the
first that works.
I have some qualms about saying that decoded times are a "type". Whether
a decoded time is valid depends on the timezone: (0 30 2 10 3 2024 0 t
-21600) is a valid decoded time in Phoenix but not in Denver, because
clocks sprang forward over that time in Denver but not in Phoenix. When
data interpretation gets that complicated, the Emacs notion of "type" is
not always the best.
prev parent reply other threads:[~2024-12-28 17:27 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-04 16:11 [bug#74689] [PATCH 0/3] fix non-x86 world rebuild Zheng Junjie
2024-12-04 16:13 ` [bug#74689] [PATCH 1/3] Partial revert "gnu: make-bootstrap: Update gcc-static to gcc-14, for the 64bit Hurd." Zheng Junjie
2024-12-04 16:31 ` Janneke Nieuwenhuizen
2024-12-04 16:40 ` Janneke Nieuwenhuizen
2024-12-04 17:08 ` Zheng Junjie
2024-12-04 17:13 ` Janneke Nieuwenhuizen
2024-12-04 16:13 ` [bug#74689] [PATCH 2/3] Partial revert "gnu: bootstrap: %bootstrap-glibc: Also fix libm.so." Zheng Junjie
2024-12-04 16:33 ` Janneke Nieuwenhuizen
2024-12-04 16:13 ` [bug#74689] [PATCH 3/3] Partial revert "gnu: bootstrap: %bootstrap-gcc: Also wrap g++ for the 64bit Hurd." Zheng Junjie
2024-12-04 16:46 ` Janneke Nieuwenhuizen
2024-12-04 17:02 ` Zheng Junjie
2024-12-04 16:57 ` [bug#74689] [PATCH v2 1/3] Partial revert "gnu: make-bootstrap: Update gcc-static to gcc-14, " Zheng Junjie
2024-12-04 16:57 ` [bug#74689] [PATCH v2 2/3] Partial revert "gnu: bootstrap: %bootstrap-glibc: Also fix libm.so." Zheng Junjie
2024-12-04 17:06 ` Janneke Nieuwenhuizen
2024-12-04 16:57 ` [bug#74689] [PATCH v2 3/3] Partial revert "gnu: bootstrap: %bootstrap-gcc: Also wrap g++ for the 64bit Hurd." Zheng Junjie
2024-12-04 17:07 ` Janneke Nieuwenhuizen
2024-12-04 17:05 ` [bug#74689] [PATCH v2 1/3] Partial revert "gnu: make-bootstrap: Update gcc-static to gcc-14, " Janneke Nieuwenhuizen
2024-12-10 23:37 ` bug#74689: [PATCH 0/3] fix non-x86 world rebuild Ludovic Courtès
2024-12-28 0:44 ` [bug#74689] [PATCH] Add predicates for decoded times and time deltas Paul Eggert
2024-12-28 15:56 ` Richard Lawrence
2024-12-28 17:26 ` Paul Eggert [this message]
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