28 Mar
2012
28 Mar
'12
2:52 a.m.
I have an odd little regular expression \B.* that seems to generate inconsistent behavior between CL-PPCRE and other regular expression engines that I've tried it with. Using CL-PPCRE:
CL-USER> (cl-ppcre::scan "\B.*" "foo bar baz") NIL
This matches in Perl, PPCRE, and RE2. Am I missing something, or should CL-PPCRE be matching this as well?
Oddly enough, change * to + leads CL-PPCRE to match:
CL-USER> (cl-ppcre::scan "\B.+" "foo bar baz") 1 11 #() #()
It seems like + matching implies that * should as well...
Thanks, Moshe