Method Select

query.go:368–397

(t iterator)

}

func (c *cachedChildQuery) Select(t iterator) NodeNavigator {
	for {
		if c.iterator == nil {
			c.posit = 0
			node := c.Input.Select(t)
			if node == nil {
				return nil
			}
			node = node.Copy()
			first := true
			c.iterator = func() NodeNavigator {
				for {
					if (first && !node.MoveToChild()) || (!first && !node.MoveToNext()) {
						return nil
					}
					first = false
					if c.Predicate(node) {
						return node
					}
				}
			}
		}

		if node := c.iterator(); node != nil {
			c.posit++
			return node
		}
		c.iterator = nil
	}
}

func (c *cachedChildQuery) Evaluate(t iterator) interface{} {
	c.Input.Evaluate(t)