The primary difference in tree-visitor is that the visit-node function returns several items: a new-node, a new-state, and a stop flag.

tree-visitor中的主要差别在于，visit-node函数返回多个项目：一个 new-node、一个new-state和一个 stop 标记。

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The primary difference in tree-visitor is that the visit-node function returns several items: a new-node, a new-state, and a stop flag.

tree-visitor中的主要差别在于，visit-node函数返回多个项目：一个 new-node、一个new-state和一个 stop 标记。

youdao