Backtracking Control Verbs

• (*THEN)

• • When backtracked into causes the pattern to backtrack directly to the next alternation in the pattern.
  • Can be thought of as an if/then statement for regular expressions.
  • /COND1 (*THEN) REST1 | COND2 (*THEN) REST2/
  • When not used in an alternation acts just like (*PRUNE) would.
  • In Perl6 this is called the “cut group” operator.