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| -rw-r--r-- | lispref/positions.texi | 25 |
1 files changed, 1 insertions, 24 deletions
diff --git a/lispref/positions.texi b/lispref/positions.texi index 7ae412ffe5a..378134e30c2 100644 --- a/lispref/positions.texi +++ b/lispref/positions.texi @@ -1,6 +1,6 @@ @c -*-texinfo-*- @c This is part of the GNU Emacs Lisp Reference Manual. -@c Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1998, 1999 +@c Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000 @c Free Software Foundation, Inc. @c See the file elisp.texi for copying conditions. @setfilename ../info/positions @@ -911,29 +911,6 @@ restored with temporary narrowing still in effect. If the old point value were outside the limits of the temporary narrowing, this would fail to restore it accurately. -The @code{save-restriction} special form records the values of the -beginning and end of the accessible portion as distances from the -beginning and end of the buffer. In other words, it records the amount -of inaccessible text before and after the accessible portion. - -This method yields correct results if @var{body} does further narrowing. -However, @code{save-restriction} can become confused if the body widens -and then makes changes outside the range of the saved narrowing. When -this is what you want to do, @code{save-restriction} is not the right -tool for the job. Here is what you must use instead: - -@example -@group -(let ((beg (point-min-marker)) - (end (point-max-marker))) - (unwind-protect - (progn @var{body}) - (save-excursion - (set-buffer (marker-buffer beg)) - (narrow-to-region beg end)))) -@end group -@end example - Here is a simple example of correct use of @code{save-restriction}: @example |