return i.rb.src.bytes[a:b]
}

// Pos returns the byte position at which the next call to Next will commence processing.
func (i *Iter) Pos() int {
	return i.p
}

func (i *Iter) setDone() {
	i.next = nextDone
	i.p = i.rb.nsrc
}

// Done returns true if there is no more input to process.
func (i *Iter) Done() bool {
	return i.p >= i.rb.nsrc
}