Hi, I have view this syntax on the man page. Guillaume
Le 18 avr. 2013 à 19:54, Eric Blake <[email protected]> a écrit : > On 04/18/2013 10:46 AM, Paul Eggert wrote: >> On 04/18/13 08:24, Eric Blake wrote: >>> {,10} is therefore undefined by POSIX. >> >> It is defined in the grep manual (in the >> node Fundamental Structure), as being >> equivalent to {0,10}, so there does appear >> to be a bug here. > > Indeed, we have changed behavior over time; my Fedora 18 box has nicer > behavior: > > $ rpm -q grep > grep-2.14-1.fc18.x86_64 > $ echo guillaumeeeeeeeguillaume | grep -E "guillaume{,10}gui" > guillaumeeeeeeeguillaume > > Guillaume was using grep 2.6.3 on Cygwin. I don't directly see it in > grep's NEWS, although one of these two releases is probably responsible: > > 2.12: > grep -E 'a{1000000000}' now reports an overflow error rather than > silently acting like grep -E 'a\{1000000000}'. > > 2.7: > X{0,0} is implemented correctly. It used to be a synonym of X{0,1}. > [bug present since "the beginning"] > > At this point, it might be worth asking the Cygwin folks to package a > newer grep, to pick up this (and other) fixes, but there's nothing to do > upstream, unless we want to improve old NEWS entries. > > -- > Eric Blake eblake redhat com +1-919-301-3266 > Libvirt virtualization library http://libvirt.org >
