id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
2750	regex backwar looking assertion	anonymous	John Maddock	"The perl expression (?<=.{3,3}).{6,6} passed in to boost regex results in   Unmatched [ or [^ 

?<= signifies a backward looking positive assertion so a pattern match should be returning 6 characters starting at offset 4
 
This works fine in perl. Any idea what part of the pattern is causing the issue?

thanks

Mark
"	Bugs	closed	To Be Determined	regex	Boost 1.36.0	Problem	worksforme