func (self *quantifiedExpr) Match(m Position) (Position, interface{}) {
var item interface{}
cur := m
res := new(vector.Vector)
// guaranteed minimum
for i := 0; i < self.min; i++ {
cur, item = self.e.Match(cur)
if cur.Failed() {
return cur, nil
}
res.Push(item)
}
last := cur
// optional (up to a maximum)
for i := self.min; self.max == -1 || i < self.max; i++ {
cur, item = self.e.Match(last)
if cur.Failed() {
return last, []interface{}(*res.Slice(0, res.Len()))
}
res.Push(item)
last = cur
}
return cur, []interface{}(*res.Slice(0, res.Len()))
}