From: Richard M. Stallman <rms@gnu.org>
Date: Thu, 11 Aug 2005 19:47:37 +0000 (+0000)
Subject: (Regular Expressions): Document re-builder.
X-Git-Tag: emacs-pretest-22.0.90~7630
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=85b6b13c6cc865b81503fc2e0b632408ab60c931;p=emacs.git

(Regular Expressions): Document re-builder.
---

diff --git a/lispref/searching.texi b/lispref/searching.texi
index a8ea8573629..f75e10e5dce 100644
--- a/lispref/searching.texi
+++ b/lispref/searching.texi
@@ -167,6 +167,16 @@ denotes a (possibly infinite) set of strings.  Searching for matches for
 a regexp is a very powerful operation.  This section explains how to write
 regexps; the following section says how to search for them.
 
+@findex re-builder
+@cindex authoring regular expressions
+  For convenient interactive development of regular expressions, you
+can use the @kbd{M-x re-builder} command.  It provides a convenient
+interface for creating regular expressions, by giving immediate visual
+feedback in a separate buffer.  As you edit the regexp, all its
+matches in the target buffer are highlighted.  Each parenthesized
+sub-expression of the regexp is shown in a distinct face, which makes
+it easier to verify even very complex regexps.
+
 @menu
 * Syntax of Regexps::       Rules for writing regular expressions.
 * Regexp Example::          Illustrates regular expression syntax.