From 82ba818ff456bcd6d56a06226e3f27e98fbb55c3 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Thu, 14 Aug 2025 22:58:58 -0500 Subject: removing all downloaded devdocs files --- devdocs/elisp/rx-notation.html | 36 ------------------------------------ 1 file changed, 36 deletions(-) delete mode 100644 devdocs/elisp/rx-notation.html (limited to 'devdocs/elisp/rx-notation.html') diff --git a/devdocs/elisp/rx-notation.html b/devdocs/elisp/rx-notation.html deleted file mode 100644 index 397812d2..00000000 --- a/devdocs/elisp/rx-notation.html +++ /dev/null @@ -1,36 +0,0 @@ -

The rx Structured Regexp Notation

As an alternative to the string-based syntax, Emacs provides the structured rx notation based on Lisp S-expressions. This notation is usually easier to read, write and maintain than regexp strings, and can be indented and commented freely. It requires a conversion into string form since that is what regexp functions expect, but that conversion typically takes place during byte-compilation rather than when the Lisp code using the regexp is run.

Here is an rx regexp22 that matches a block comment in the C programming language:

(rx "/*"                          ; Initial /*
-    (zero-or-more
-     (or (not (any "*"))          ;  Either non-*,
-         (seq "*"                 ;  or * followed by
-              (not (any "/")))))  ;  non-/
-    (one-or-more "*")             ; At least one star,
-    "/")                          ; and the final /
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or, using shorter synonyms and written more compactly,

(rx "/*"
-    (* (| (not "*")
-          (: "*" (not "/"))))
-    (+ "*") "/")
-
-

In conventional string syntax, it would be written

"/\\*\\(?:[^*]\\|\\*[^/]\\)*\\*+/"
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The rx notation is mainly useful in Lisp code; it cannot be used in most interactive situations where a regexp is requested, such as when running query-replace-regexp or in variable customization.

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- Copyright © 1990-1996, 1998-2022 Free Software Foundation, Inc.
Licensed under the GNU GPL license.
- https://www.gnu.org/software/emacs/manual/html_node/elisp/Rx-Notation.html -

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