C++ unclosed namespace detection whishlist

[Steven T. Hatton]

Symptoms:

I've heard tell that vim will give a warning in the form lf changing
the buffer color when a namespace is opened, but not closed in C++
mode.  I've been stung a couple of times by missing the closing '}' at
the end of a file in which a namespace is opened.  It is one of the
least obvious mistakes to make when editing C++ code in Emacs.  Even
worse than forgetting the ';' at the end of a class definition.  I'm
wondering if Emacs C++ mode could provide a more obtrusive indication
that a namespace has been left open in a file.


In GNU Emacs 22.0.50.2 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2005-06-08 on ljosalfr
Distributor `The X.Org Foundation', version 11.0.60802000
configured using `configure '--prefix=/home/hattons/opt/org/gnu/emacs-cvs''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: POSIX
  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: en_US.UTF-8
  locale-coding-system: utf-8
  default-enable-multibyte-characters: t

Major mode: C++

Minor modes in effect:
  delete-selection-mode: t
  pc-selection-mode: t
  show-paren-mode: t
  senator-minor-mode: t
  which-function-mode: t
  semantic-idle-summary-mode: t
  semantic-idle-scheduler-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  tooltip-mode: t
  auto-compression-mode: t
  menu-bar-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t
  next-error-follow-minor-mode:  Fol
  abbrev-mode: t

Recent input:
C-x C-f <up> <return> <help-echo> <help-echo> <up> 
<up> <up> <up> <right> <right> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <left> <left> <left> <left> <left> <left> <left> 
<left> <right> S T H _ P R O J E C T _ <S-left> <S-left> 
<S-left> <S-left> <S-left> <S-left> <S-left> <S-left> 
<S-left> <S-left> <S-left> <S-left> <C-insert> <down> 
<S-insert> <down> <down> <down> n a m e M-/ SPC p r 
o j e c t SPC { <return> } M-x r e p o r t SPC e m 
<tab> <return>

Recent messages:
Loading eldoc...done
Loading jit-lock...done
For information about the GNU Project and its goals, type C-h C-p.
Loading cc-mode...done
Loading semantic-c...done
Loading autoinsert...done
Loading semantic-edit...done
Mark set [6 times]
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Loading emacsbug...done