Say I have a buffer with text. I would like to test a regular expression (ideally Perl type) against my buffer and have Emacs highlight the matches on it.
For example, the following regexp (taken from Wikipedia):
(?<=\.) {2,}(?=[A-Z])
would match as follows on the following text:
This regular expression in particular matches at least two spaces occurring after period (.) and before an upper case letter.
Does Emacs provide an interactive regular expression matcher for Perl regular expressions?
If the answer to the latter is no:
Is there a reason why native support of Perl regular expressions wasn't (ever) considered in Emacs? (considering that it is a well known standard in Unix/Linux)
How could one proceed about building one such Perl regexp matcher? (perhaps calling Perl under the hood, or pre-converting the Perl regexp to a supported variant?)
