Ruby Programming Language :: I think this is a regexp bug


	I think this is a regexp bug I'd greatly appreciate if anyone could explain what's up with this: $KCODE='u' >> "" =~ //i => 0 >> "" =~ /[]/i => 0 >> " " =~ / /i => 0 >> " " =~ /[ ]/i => nil That has to be a bug, right? Maybe this is a good opportunity to start looking at oniguruma. Is anyone aware of backward compatibility issues when going from the regular Regexp to oniguruma? Daniel On May 25, 2007, at 9:16 AM, Daniel DeLorme wrote: > I'd greatly appreciate if anyone could explain what's up with this: > $KCODE='u' > >> "" =~ //i > => 0 > >> "" =~ /[]/i > => 0 > >> " " =~ / /i > => 0 > >> " " =~ /[ ]/i > => nil > That has to be a bug, right? I can't reproduce it: fxn@feynman:~/tmp$ cat foo.rb $KCODE = 'u' puts "" =~ //i puts "" =~ /[]/i puts " " =~ / /i puts " " =~ /[ ]/i fxn@feynman:~/tmp$ ruby foo.rb 0 0 0 0 fxn@feynman:~/tmp$ ruby -v ruby 1.8.5 (2006-12-25 patchlevel 12) [i686-darwin8.8.1] - Hide quoted text - Xavier Noria wrote: > I can't reproduce it: > fxn@feynman:~/tmp$ cat foo.rb > $KCODE = 'u' > puts "" =~ //i > puts "" =~ /[]/i > puts " " =~ / /i > puts " " =~ /[ ]/i > fxn@feynman:~/tmp$ ruby foo.rb > 0 > 0 > 0 > 0 > fxn@feynman:~/tmp$ ruby -v > ruby 1.8.5 (2006-12-25 patchlevel 12) [i686-darwin8.8.1] Ah, silly me I forgot to test on different versions. It happens on 1.8.4 but neither on 1.8.5 or 1.8.6 Thanks for the sanity check. Daniel