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修改iterator ToHead ToTail的实现, 和使用方法.

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This commit is contained in:
huangsimin
2020-03-18 11:44:27 +08:00
parent 239cb3c189
commit b34134e22f
15 changed files with 248 additions and 37 deletions
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27
tree/vbtkey/iterator.go
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@@ -35,13 +35,36 @@ func (iter *Iterator) GetNode() *Node {
}
func (iter *Iterator) ToHead() {
for iter.Prev() {
if iter.cur == nil {
iter.cur = iter.up
}
for iter.cur.parent != nil {
iter.cur = iter.cur.parent
}
for iter.cur.children[0] != nil {
iter.cur = iter.cur.children[0]
}
iter.SetNode(iter.cur)
iter.cur = nil
}
func (iter *Iterator) ToTail() {
for iter.Next() {
if iter.cur == nil {
iter.cur = iter.up
}
for iter.cur.parent != nil {
iter.cur = iter.cur.parent
}
for iter.cur.children[1] != nil {
iter.cur = iter.cur.children[1]
}
iter.SetNode(iter.cur)
iter.cur = nil
}
func (iter *Iterator) SetNode(n *Node) {