Comment on A Regular Expression Matcher (2007)parentComments−ufo6yA surprising number of regex tools used in the wild employ a backtracking algorithm like this one. Some popular features such as lookaheada, lookbehinds, and backreferences can't always be matched using a finite automaton.
Comments
A surprising number of regex tools used in the wild employ a backtracking algorithm like this one. Some popular features such as lookaheada, lookbehinds, and backreferences can't always be matched using a finite automaton.