Bug report

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2 total messages Started by Minh.Tue.Vo Sat, 17 Aug 1991 11:08

#1755

Author: Minh.Tue.Vo
Date: Sat, 17 Aug 1991 11:08

44 lines
1744 bytes

Epoch version: 3.2.22
X Window version: X11R4

Major mode: c-mode

Bug description:

	scan-sexps screws up when there is a colon (:) in the sexp;
	the return value is 1 more than it should be, i.e. going past
	the colon instead of stopping just before it.

Example: (running in c-mode)

	-------- Text in buffer ---------
	abc:
	---------------------------------

	Point is just before 'a'.
	Call (forward-sexp 1) [this does (goto-char (scan-sexps (point) 1))].
	Point is now just after ':'.  Should be just before ':'.

Consequence:

	c-indent-line in c-mode uses forward-sexp to detect labels:

	[excerpt code from GNU/lisp/c-mode.el]
	(defun c-indent-line ()
		...
		(cond ((or (looking-at "case[ \t]")
		           (and (looking-at "[A-Za-z]")
		                (save-excursion
		                  (forward-sexp 1)
		                  (looking-at ":"))))
		        (setq indent (max 1 (+ indent c-label-offset))))
		...
	[end excerpt]

	This bug in scan-sexps causes c-indent-line to indent lines
	containing labels incorrectly (although "case" lines are OK).

This bug is not present in GNU-Emacs version 18.54.52 which I used
before I switched to Epoch 3.2.22.

Minh Tue Vo (Minh.Tue.Vo@cs.cmu.edu)

Re: Bug report

#1756

Author: Alan M. Carroll
Date: Sun, 18 Aug 1991 18:37

20 lines
1192 bytes

In article <McfLF1S00hYdF41cQI@cs.cmu.edu>, Minh.Tue.Vo@cs.cmu.edu writes:
> Epoch version: 3.2.22
> X Window version: X11R4
> 
> Major mode: c-mode
> 
> Bug description:
> 
> 	scan-sexps screws up when there is a colon (:) in the sexp;

This is a known bug. The fix is to put

(modify-syntax-entry ?: "." c-mode-syntax-table)

into your site.el

-- 
Alan M. Carroll          <-- Another casualty of applied metaphysics
Epoch Development Team   
Urbana Il.               "I hate shopping with the reality-impaired" - Susan

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