接口 TreeVisitorAction
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public interface TreeVisitorAction
How to execute code for node t when a visitor visits node t. Execute pre() before visiting children and execute post() after visiting children.
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方法详细资料
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pre
java.lang.Object pre(java.lang.Object t)
Execute an action before visiting children of t. Return t or a rewritten t. It is up to the visitor to decide what to do with the return value. Children of returned value will be visited if using TreeVisitor.visit().
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post
java.lang.Object post(java.lang.Object t)
Execute an action after visiting children of t. Return t or a rewritten t. It is up to the visitor to decide what to do with the return value.
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