Add a function for quoting PCRE expressions

Question

Add a function for quoting PCRE expressions

Closed this issue 9 years ago · 7 comments

Since pcre2el is my go-to library for handling PCREs in Emacs, it'd be nice to include a mechanism for quoting PCREs. Would you be interested in a PR for such functionality? We have code for this already in ag.el.

Answer 1 · 2014-02-11T18:07:21.000Z

Sorry for the delayed response. This sounds useful, but I'm not sure I completely understand what you mean by a mechanism for quoting PCREs -- could you give me a bit more detail? Quoting RE metacharacters, or something else?

Answer 2 · 2014-02-11T18:53:36.000Z

Yep, just quoting RE metacharacters. For example, from ".*[]foo+" to "\\.\\*\\[\\]foo\\+".

Answer 3 · 2014-02-15T18:39:06.000Z

So, this is basically a one-line function, since it's just a special case of converting to pcre syntax:

(defun rxt-quote-pcre (text)
  (rxt-adt->pcre (rxt-string text)))

(string=
 (rxt-quote-pcre ".*[]foo+")
 "\\.\\*\\[\\]foo\\+") ;; => t

I guess it should probably have an interactive spec & add the result to the kill-ring, too. WDYT?

Answer 4 · 2014-02-15T23:42:48.000Z

I'm impressed it's just one line! :) I'm interested in using it for calling external tools that expect PCRE patterns, so adding the result to the kill-ring isn't useful for me. Otherwise, looks great.

Answer 5 · 2014-11-09T17:27:23.000Z

Would you like me to send a PR for this?

Answer 6 · 2014-11-09T20:28:21.000Z

Would you mind? I'm sorry to have let it drop, just swamped with other work right now.

Answer 7 · 2015-04-27T00:14:20.000Z

Should now be fixed in master. Sorry for the long delay!