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bug#24977: 25.1; search and query-replace in Dired

From: Dmitry Gutov
Subject: bug#24977: 25.1; search and query-replace in Dired
Date: Mon, 21 Nov 2016 20:42:14 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:50.0) Gecko/20100101 Thunderbird/50.0

On 21.11.2016 20:37, Drew Adams wrote:

This is a major reason for this bug report (and bug #23428).
The replacement is strictly less powerful.  It is essentially
just a `grep' or `find'.  (And it depends on an outside program.)

It might be less powerful. On the flip side, the replacement is usually faster. Especially in the "many files, few matches" situations.

Those should be doable, as long as the regexp contains at least
_something_ else.

What does that mean?  Specify what you mean by "_something_ else".
Clearly you do NOT mean to support the regexps that Emacs supports.

For instance, if the regexp contains a simple literal and an Emacs-only construct, we can remove the latter before passing the regexp to find+grep, and then post-process the results inside Emacs using the full syntax.

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