interactive regexp typing: incorrect diagnostic

interactive regexp typing: incorrect diagnostic

[Akim Demaille]

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In GNU Emacs 21.3.1 (i386-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2004-04-07 on raven, modified by Debian
configured using `configure '--build=i386-linux' '--host=i386-linux' '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib' '--localstatedir=/var/lib' '--infodir=/usr/share/info' '--mandir=/usr/share/man' '--with-pop=yes' '--with-x=yes' '--with-x-toolkit=athena' 'CFLAGS=-DDEBIAN -g -O2' 'build_alias=i386-linux' 'host_alias=i386-linux''
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: fr_FR
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: t

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

Hi,

When entering a regexp for query-replace-regexp, the parser seems to
be confused with "unbalanced parentheses".  Type in `[^)]' for
instance, and see it complain about the paren.

Thanks!


Recent input:
<return> C-M-% <up> <up> <right> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <left> 
* <return> <up> <up> <return> y y y C-x C-s C-M-% <up> 
<up> <right> <right> <right> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <tab> C-k <backspace> <backspace> ^ } <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> ( [ 
<backspace> <backspace> [ ^ ) ] C-g C-g M-x e m a c 
<tab> b u <tab> <M-backspace> <M-backspace> r e p o 
<tab> r t <tab> <return>

Recent messages:
Mark set
Replaced 0 occurrences
Mark set
Replaced 3 occurrences
Wrote /home/akim/lectures/complec/trunk/compilation-lecture/instr-selection/instr-selection.tex
Mismatched parentheses [2 times]
query-replace-read-args: Quit
keyboard-quit: Quit
Making completion list...
Loading emacsbug...done

Re: interactive regexp typing: incorrect diagnostic

[Richard Stallman]

The Emacs paren-matched has no understanding of regexp syntax, so I am
not surprised by this bug.  Fixing it would be a lot of work.
If someone writes code for this, we could install it.

Re: interactive regexp typing: incorrect diagnostic

[Akim Demaille]

>>> "rms" == Richard Stallman <rms@gnu.org> writes:

 > The Emacs paren-matched has no understanding of regexp syntax, so I am
 > not surprised by this bug.  Fixing it would be a lot of work.
 > If someone writes code for this, we could install it.

I understand this; too bad that regcomp's return values make no
difference between really unbalanced parens, and a lack of closing
parens, also deep inside it sees the difference.

But then, should this control be activated?