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bug#18088: 24.4.50; `region-extract-function': (1) NEWS, (2) return valu
bug#18088: 24.4.50; `region-extract-function': (1) NEWS, (2) return value
Wed, 23 Jul 2014 09:04:55 -0700 (PDT)
Variable `region-extract-function' was apparently added in Emacs 24.4.
It is used in several key places that affect killing or deleting text.
1. It should be called out in NEWS, saying what user-visible behavior
its presence changes.
2. The doc string points out that, depending on the value of its
argument, its return value is (a) significant and specified or (b)
insignificant and undefined.
This is the first time I have seen this for an Emacs function
distributed with GNU Emacs. Certainly it is the first time I've
seen such odd behavior documented.
This does NOT seem like the kind of thing we should be doing - let
alone *encouraging* by defining a variable whose value will be
user-defined functions that have such twisted behavior.
Is this unusual design necessary? Seems to be sloppy, error prone,
and an invitation to bad programming habits by users.
In GNU Emacs 126.96.36.199 (i686-pc-mingw32)
of 2014-06-28 on ODIEONE
Bzr revision: 117431 address@hidden
Windowing system distributor `Microsoft Corp.', version 6.1.7601
--enable-checking=yes,glyphs 'CFLAGS=-O0 -g3'
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- bug#18088: 24.4.50; `region-extract-function': (1) NEWS, (2) return value,
Drew Adams <=