Documentation for infix ?| assembled from the following pages:
Language documentation: Operators §
From Operators
(Operators) infix ?| §
multi sub infix:<?|>(Mu = Bool::False)multi sub infix:<?|>(Mu \a, Mu \b)Boolean logical OR operator. Coerces the argument(s) to Bool and performs logical OR (inclusive OR) on it(them): it will return True if at least one of the argument is True. On a single argument it behaves as identity, returning the coerced value.