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bug#32562: 26; `read-char(-exclusive)' and `characterp'
From: |
Drew Adams |
Subject: |
bug#32562: 26; `read-char(-exclusive)' and `characterp' |
Date: |
Tue, 28 Aug 2018 13:39:20 -0700 (PDT) |
Perhaps there is no bug here, other than incomplete or insufficiently
clear doc. Dunno.
emacs -Q
M-: (setq foo (read-char "Char: "))
M-:
shows: 134217786 (#o1000000072, #x800003a), a number too large
to be `characterp'. And M-: (characterp foo) ; returns nil.
Same thing for `read-char-exclusive'.
Something seems wrong. The doc for `read-char(-exclusive)' talks about
reading a character. For `read-char' it says that it raises an error for
a non-char event. And for `read-char-exclusive' it says that it ignores
non-char events that it reads.
But they both seem to read the event from `M-:' and return its value
(a number). And it is not a character, according to `characterp'.
I'm confused. Please consider fixing this, at least by clarifying the doc.
Why should a function that reads a character, and either ignores a
non-char or raises an error for a non-char, return a non-character?
And what function reads a `characterp' character, either ignoring
anything else or raising an error for anything else?
In GNU Emacs 26.1 (build 1, x86_64-w64-mingw32)
of 2018-05-30
Repository revision: 07f8f9bc5a51f5aa94eb099f3e15fbe0c20ea1ea
Windowing system distributor `Microsoft Corp.', version 10.0.16299
Configured using:
`configure --without-dbus --host=x86_64-w64-mingw32
--without-compress-install 'CFLAGS=-O2 -static -g3''
- bug#32562: 26; `read-char(-exclusive)' and `characterp',
Drew Adams <=