@c -*-texinfo-*-
@c This is part of the GNU Emacs Lisp Reference Manual.
@c Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2001,
-@c 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+@c 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
@c See the file elisp.texi for copying conditions.
@setfilename ../../info/searching
@node Searching and Matching, Syntax Tables, Non-ASCII Characters, Top
@code{case-fold-search} to @code{nil}. Then all letters must match
exactly, including case. This is a buffer-local variable; altering the
variable affects only the current buffer. (@xref{Intro to
-Buffer-Local}.) Alternatively, you may change the value of
-@code{default-case-fold-search}, which is the default value of
-@code{case-fold-search} for buffers that do not override it.
+Buffer-Local}.) Alternatively, you may change the default value of
+@code{case-fold-search}.
Note that the user-level incremental search feature handles case
distinctions differently. When the search string contains only lower
they do ignore case.
@end defopt
-@defvar default-case-fold-search
-The value of this variable is the default value for
-@code{case-fold-search} in buffers that do not override it. This is the
-same as @code{(default-value 'case-fold-search)}.
-@end defvar
-
@defopt case-replace
This variable determines whether the higher level replacement
functions should preserve case. If the variable is @code{nil}, that
This matches graphic characters---everything except @acronym{ASCII} control
characters, space, and the delete character.
@item [:lower:]
-This matches any lower-case letter, as determined by
-the current case table (@pxref{Case Tables}).
+This matches any lower-case letter, as determined by the current case
+table (@pxref{Case Tables}). If @code{case-fold-search} is
+non-@code{nil}, this also matches any upper-case letter.
@item [:multibyte:]
This matches any multibyte character (@pxref{Text Representations}).
@item [:nonascii:]
@item [:unibyte:]
This matches any unibyte character (@pxref{Text Representations}).
@item [:upper:]
-This matches any upper-case letter, as determined by
-the current case table (@pxref{Case Tables}).
+This matches any upper-case letter, as determined by the current case
+table (@pxref{Case Tables}). If @code{case-fold-search} is
+non-@code{nil}, this also matches any lower-case letter.
@item [:word:]
This matches any character that has word syntax (@pxref{Syntax Class
Table}).
matched---for instance, if it appears inside of an alternative that
wasn't used, or inside of a repetition that repeated zero times---then
the corresponding @samp{\@var{digit}} construct never matches
-anything. To use an artificial example,, @samp{\(foo\(b*\)\|lose\)\2}
+anything. To use an artificial example, @samp{\(foo\(b*\)\|lose\)\2}
cannot match @samp{lose}: the second alternative inside the larger
group matches it, but then @samp{\2} is undefined and can't match
anything. But it can match @samp{foobb}, because the first