Thanks, that would be helpful! I already use sed, but the color option would work better for me.
-- Wayne Pollock On Feb 20, 2013, at 6:16 AM, "Paolo Bonzini" <[email protected]> wrote: > Il 10/02/2013 00:28, Pollock, Wayne ha scritto: >> In teaching REs, I use grep and recently noticed >> the colors highlight all possible matches, not >> the one match as per POSIX's rules: >> >> echo 'abcdefabc' | grep '[abc]' >> >> Should highlight only the first "a" (earliest match has >> precedence, than longest). Instead, every "a", "b", and >> "c" is highlighted. It would be my guess that grep historically >> didn't need to know exactly what matched, just that something >> did, so the code doesn't bother to apply any rules to determine >> exactly what matched. >> >> I don't mind the current behavior as a default, but there should >> be some option to force grep to only highlight the one match, >> as per BRE/ERE/PCRE rules of precedence. >> > > We could add a --max-line-matches option. It would affect --color and > -o. It would be mostly useful for -o, but would help you nicely as well. :) > > For your task, in the meanwhile you can use > > echo 'abcdefabc' | sed 's/[abc]/|&|/' > > Paolo Please Note: Due to Florida's very broad public records law, most written communications to or from College employees regarding College business are public records, available to the public and media upon request. Therefore, this email communication may be subject to public disclosure.
