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[Emacs-diffs] /srv/bzr/emacs/emacs-23 r99831: Better doc fix for Bug#628
From: |
Chong Yidong |
Subject: |
[Emacs-diffs] /srv/bzr/emacs/emacs-23 r99831: Better doc fix for Bug#6283. |
Date: |
Wed, 02 Jun 2010 13:26:31 -0400 |
User-agent: |
Bazaar (2.0.3) |
------------------------------------------------------------
revno: 99831
committer: Chong Yidong <address@hidden>
branch nick: emacs-23
timestamp: Wed 2010-06-02 13:26:31 -0400
message:
Better doc fix for Bug#6283.
searching.texi (Regexp Special): Remove obsolete information
about matching non-ASCII characters, and suggest using char
classes (Bug#6283).
modified:
doc/lispref/ChangeLog
doc/lispref/searching.texi
=== modified file 'doc/lispref/ChangeLog'
--- a/doc/lispref/ChangeLog 2010-06-02 17:14:01 +0000
+++ b/doc/lispref/ChangeLog 2010-06-02 17:26:31 +0000
@@ -1,7 +1,8 @@
2010-06-02 Chong Yidong <address@hidden>
- * searching.texi (Regexp Special): Replace "octal 377"
- with "#o377" (Bug#6283).
+ * searching.texi (Regexp Special): Remove obsolete information
+ about matching non-ASCII characters, and suggest using char
+ classes (Bug#6283).
2010-05-30 Juanma Barranquero <address@hidden>
=== modified file 'doc/lispref/searching.texi'
--- a/doc/lispref/searching.texi 2010-06-02 17:14:01 +0000
+++ b/doc/lispref/searching.texi 2010-06-02 17:26:31 +0000
@@ -362,7 +362,7 @@
Thus, @samp{[ad]} matches either one @samp{a} or one @samp{d}, and
@samp{[ad]*} matches any string composed of just @samp{a}s and @samp{d}s
-(including the empty string), from which it follows that @samp{c[ad]*r}
+(including the empty string). It follows that @samp{c[ad]*r}
matches @samp{cr}, @samp{car}, @samp{cdr}, @samp{caddaar}, etc.
You can also include character ranges in a character alternative, by
@@ -400,21 +400,11 @@
@var{c1} is the first character of the charset to which @var{c2}
belongs.
-You cannot always match all address@hidden characters with the
-regular expression @code{"[\200-\377]"}. This works when searching a
-unibyte buffer or string (@pxref{Text Representations}), but not in a
-multibyte buffer or string, because many address@hidden
-characters have codes above @code{#o377}. However, the regular
-expression @code{"[^\000-\177]"} does match all address@hidden
-characters (see below regarding @samp{^}), in both multibyte and
-unibyte representations, because only the @acronym{ASCII} characters
-are excluded.
-
-A character alternative can also specify named
-character classes (@pxref{Char Classes}). This is a POSIX feature whose
-syntax is @samp{[:@var{class}:]}. Using a character class is equivalent
-to mentioning each of the characters in that class; but the latter is
-not feasible in practice, since some classes include thousands of
+A character alternative can also specify named character classes
+(@pxref{Char Classes}). This is a POSIX feature whose syntax is
address@hidden:@var{class}:]}. Using a character class is equivalent to
+mentioning each of the characters in that class; but the latter is not
+feasible in practice, since some classes include thousands of
different characters.
@item @samp{[^ @dots{} ]}
@@ -432,6 +422,10 @@
mentioned as one of the characters not to match. This is in contrast to
the handling of regexps in programs such as @code{grep}.
+You can specify named character classes, just like in character
+alternatives. For instance, @samp{[^[:ascii:]]} matches any
address@hidden character. @xref{Char Classes}.
+
@item @samp{^}
@cindex beginning of line in regexp
When matching a buffer, @samp{^} matches the empty string, but only at the
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