func (i *Iter) InitString(f Form, src string) {
	i.p = 0
	if len(src) == 0 {
		i.setDone()
		i.rb.nsrc = 0
		return
	}
	i.multiSeg = nil
	i.rb.initString(f, src)
	i.next = i.rb.f.nextMain
	i.asciiF = nextASCIIString
	i.info = i.rb.f.info(i.rb.src, i.p)
	i.rb.ss.first(i.info)
}

// Seek sets the segment to be returned by the next call to Next to start
// at position p.  It is the responsibility of the caller to set p to the

func (i *Iter) InitString(f Form, src string) {
	i.p = 0
	if len(src) == 0 {
		i.setDone()
		i.rb.nsrc = 0
		return
	}
	i.multiSeg = nil
	i.rb.initString(f, src)
	i.next = i.rb.f.nextMain
	i.asciiF = nextASCIIString
	i.info = i.rb.f.info(i.rb.src, i.p)
	i.rb.ss.first(i.info)
}

// Seek sets the segment to be returned by the next call to Next to start
// at position p.  It is the responsibility of the caller to set p to the