Direction reports the direction of the given label as defined by RFC 5893.

DirectionString reports the direction of the given label as defined by RFC 5893.

New returns a Transformer that verifies that input adheres to the Bidi Rule.

Valid reports whether b conforms to the BiDi rule.

ValidString reports whether s conforms to the BiDi rule.

ErrInvalid indicates a label is invalid according to the Bidi Rule.

Transformer implements transform.Transform.