Tag Archives: Perl Regx backtracking

More backtracking examples

Backtracking might be costly so one should try to avoid useless backtracking. Perl regx have  special form of parentheses: (?>…). These are called Perl’s “don’t-ever-backtrack-into-me” markers. They will tell the regex engine that the enclosed sub-pattern can safely be skipped over during backtracking. As we know that the re-matching the contents either won’t succeed or, if it… Read More »