[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: query-replace-regexp: Can't use \0 in TO-STRING

From: Juri Linkov
Subject: Re: query-replace-regexp: Can't use \0 in TO-STRING
Date: Wed, 10 May 2017 01:02:04 +0300
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (x86_64-pc-linux-gnu)

>> >> Why not \0? I think \0 is more intuitive and also used in vim.
>> > I agree is more intuitive, and it works in `replace-match', or instance:
>> > (mapcar
>> >  (lambda (group)
>> >    (let ((str "foo123"))
>> >      (when (string-match "[a-z]+\\([1-9]+\\)" str)
>> >        (replace-match "bar" nil nil str group))))
>> >  (list 0 1))
>> > => ("bar" "foobar")
>> >
>> > Are you willing to write a patch to implement it?
>> The following patch works on my machine for regexp replacing. But I
>> don't known if \0 should be supported in other places such as
>> sort-regexp-fields, occur.
> If this is accepted (and I'm not sure we should), then the user manual
> should also be updated, and NEWS should have an entry about the
> change.

Some other regexp engines support the \0 format as well:
What is important is to clearly differentiate the whole match from
back references in the documentation (i.e. unlike back references
\0 works only in replacements, not matches).

reply via email to

[Prev in Thread] Current Thread [Next in Thread]