public boolean hasTail() {
if (hasPayload()) {
return seq != null;
} else {
return seq != null && seq.tail() != null;
}
}
public Seq<Pattern> tail() {
if (!generated) {
generate();
}
if (hasPayload()) {
return seq;
} else {
return (seq == null) ? null : seq.tail();
}
}
public Pattern head() {
if (!generated) {
generate();
}
if (hasPayload()) {
return wrap(token);
} else {
return (seq == null) ? null : seq.head();
}
}