From: Richard Stallman <rms@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: why (error "Transposed region has length 0") ?
Date: Sun, 9 Jun 2002 09:19:14 -0600 (MDT) [thread overview]
Message-ID: <200206091519.g59FJE200266@aztec.santafe.edu> (raw)
In-Reply-To: <20020608130129.GA705978@bruegel.RZ.TU-Ilmenau.DE> (message from Paul Stoeber on Sat, 8 Jun 2002 15:01:29 +0200)
The story of transpose-regions is peculiar. It was meant to be used
in transpose-subr, but we never put it into service there because
nobody was ever convinced that it really worked correctly in all
cases (it is rather a complex thing to check) and nobody felt like debugging whatever problems it might have.
The function is used in just one Emacs package, hanoi.el. I geuss
that has given it a certain amount of testing, but not very broadly.
The main motivation for transpose-regions was to reduce memory usage,
sinceit avoids copying both regions into strings. Nowadays that
optimization may not be worth the trouble. We could simply delete the
current transpose-region and use 6 lines of Lisp code (see
transpose-subr-1) instead.
prev parent reply other threads:[~2002-06-09 15:19 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-08 13:01 why (error "Transposed region has length 0") ? Paul Stoeber
2002-06-09 15:19 ` Richard Stallman [this message]
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