2016-11-18 17:06:36 +0000, Stephane Chazelas: [...] > That might have been the case a long time ago, as I remember > some discussion about it as it explained some wrong information > in the documentation, but as far as I and gdb can tell, grep > 2.26 at least call pcre_exec for every line of the input with > grep -P. > > If it didn't > > echo test | grep -P '\n$' > > would match. > > I'll try and dig up the old discussions. [...]
I can't find the discussions, and they should have been a follow-up on https://debbugs.gnu.org/cgi/bugreport.cgi?bug=16871 but looking at the code, that changed in commit a14685c2833f7c28a427fecfaf146e0a861d94ba in 2010 for https://savannah.gnu.org/bugs/?27460 And shortly after, -Pz was supported (as that was made straightforward to do after the change I guess). Note that we should also be able to support grep -Pe pat1 -e pat2 now as well. And PCRE_MULTILINE now can only improve performance. -- Stephane
