From: MON KEY <monkey@sandpframing.com>
To: Chong Yidong <cyd@stupidchicken.com>
Cc: Andreas Schwab <schwab@linux-m68k.org>, 6878@debbugs.gnu.org
Subject: bug#6878: bool-vectors of length 0 signal error when aref/aset the 0th element
Date: Thu, 19 Aug 2010 13:09:35 -0400 [thread overview]
Message-ID: <AANLkTi=LFNvWmrS7m_iMdZCa1VSCw9djb7CAdzAcmVmB@mail.gmail.com> (raw)
In-Reply-To: <87r5hutw2q.fsf@stupidchicken.com>
On Thu, Aug 19, 2010 at 12:18 PM, Chong Yidong <cyd@stupidchicken.com> wrote:
> MON KEY <monkey@sandpframing.com> writes:
>
>> So why would/should Emacs let me create a bool-vectors that I can
>> neither set nor get without signalling an error?
>
> You can vconcat them.
>
Yep:
(let* ((ab (make-bool-vector 1 t))
(abeq (cons ab ab)))
(vconcat (car abeq) (cdr abeq)))
;=>[t t]
But, again, where is the `t' or `nil'?
(let* ((ab (make-bool-vector 0 t))
(abeq (cons ab ab)))
(vconcat (car abeq) (cdr abeq)))
;=> []
The manual says a `t' or `nil' "must" be there.
--
/s_P\
next prev parent reply other threads:[~2010-08-19 17:09 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-18 4:19 bug#6878: bool-vectors of length 0 signal error when aref/aset the 0th element MON KEY
2010-08-18 7:36 ` Stefan Monnier
2010-08-19 1:51 ` MON KEY
2010-08-19 8:42 ` Andreas Schwab
2010-08-19 14:13 ` MON KEY
2010-08-19 15:51 ` Stefan Monnier
2010-08-19 17:06 ` MON KEY
2010-08-19 14:47 ` Stefan Monnier
2010-08-19 15:04 ` Andreas Schwab
2010-08-19 16:18 ` Chong Yidong
2010-08-19 17:09 ` MON KEY [this message]
2010-08-19 18:40 ` Juanma Barranquero
2010-08-19 23:24 ` Chong Yidong
2010-08-20 2:01 ` MON KEY
2010-08-20 2:23 ` Juanma Barranquero
2010-08-20 18:01 ` MON KEY
2010-08-20 19:49 ` Juanma Barranquero
2010-08-20 23:06 ` MON KEY
2010-08-20 13:02 ` Stefan Monnier
2010-08-20 18:44 ` MON KEY
2010-08-21 12:40 ` Kevin Rodgers
2010-08-21 15:53 ` Andreas Schwab
2010-08-21 17:02 ` MON KEY
2010-08-18 8:36 ` Andreas Schwab
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