Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]


Groups > gnu.bash.bug > #14556

Re: built-in regex matches wrong character

From Chet Ramey <chet.ramey@case.edu>
Newsgroups gnu.bash.bug
Subject Re: built-in regex matches wrong character
Date 2018-09-06 10:25 -0400
Message-ID <mailman.446.1536243929.1284.bug-bash@gnu.org> (permalink)
References <201809051850.w85IoClP001449@mamatb-laptop> <5d3e2655-9b29-563e-a3aa-f96f6563f9fc@redhat.com> <cdf3707d-9e10-4be3-94f9-4cb5f5d9b9ed@case.edu> <0ac36d5b-95ec-78c6-a8ed-6c1686ebbf57@redhat.com>

Show all headers | View raw


On 9/6/18 10:23 AM, Eric Blake wrote:

> But bash could be taught to convert any regex that contains a range with
> both endpoints ASCII into a different bracket expression before handing
> things over to regcomp().  That is, if the user is matching against [a-d],
> bash hands [abcd] to regcomp() instead.  You don't need a flag in regcomp()
> to get RRI, just merely some pre-processing (and often memory allocation,
> as the expansion of a range into a non-range tends to require more
> characters).

Someone would have to write that code.

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
		 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/

Back to gnu.bash.bug | Previous | Next | Find similar | Unroll thread


Thread

Re: built-in regex matches wrong character Chet Ramey <chet.ramey@case.edu> - 2018-09-06 10:25 -0400

csiph-web