Take the 2-minute tour ×  Is there a way to let Emacs' regexp
based commands such query-replace-regexp use Perl regexp?  I am
hoping there is some reasonably simple way to achieve this, for
example, by adding code in .emacs.  share|improve this question
1 Answer 1  up vote 1 down vote accepted  Sorry, no, there
isn't. Almost all features of Perl regular expressions are
available, though; see the info manual, under Top > Search >
Regexps for details on what the Emacs version of the same syntax
is.  share|improve this answer  Your Answer