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| Subject: | Re: bug with grep 3.0.2 in cygwin 3.0.7 |
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| From: | Eliot Moss <moss AT cs DOT umass DOT edu> |
| Message-ID: | <e1d20326-c60f-47de-551f-6254c760c644@cs.umass.edu> |
| Date: | Fri, 30 Aug 2019 09:04:43 -0400 |
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On 8/30/2019 2:12 AM, Brian Inglis wrote: > On 2019-08-29 19:42, Eliot Moss wrote: >> On 8/29/2019 3:08 PM, Andrey Repin wrote: >>>> I encounter some problem with grep option -E on cygwin 3.0.7 >>>> echo "a^b" | grep "a^b" #answer a^b ie it's OK >>>> but >>>> echo "a^b" | grep -E "a^b" #answer nothing " for me it's KO >>> That's an expected result of an impossible constraint. >>>> I have to backslash ^ to be OK like : grep -E 'a\^b' >>> Yes. >>>> Is-it a bug ? >>> No. >>>> I don't know if all versions of cygwin and grep are concerned. >>> RTFM, this is regexp basics. >> There was a really great answer to this earlier. I tried an >> answer, but was wrong. One has to read the "fine print" really >> carefully. At first I thought it was a bug, at least in the >> documentation, but the meaning of a^b, when ^ is the metacharacter, >> is kind of subtle (IMO at least). It's easy to miss that >> subtlety and think that if ^ is not at the beginning of an >> expression it will be treated as an ordinary character ... >> But my main point is that RTM would be enough; RTFM seemed >> to me perhaps a little more rude than necessary. > > https://cygwin.com/acronyms/#RTFM exists and has been amusing rather than rude > in our industry for decades, especially in non-native English locales e.g. here > in this list: "Read The Fine Manual"; but RTM for software products is usually > "Release To Manufacturing", from the days when media was produced! Ok, I relent! E -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
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