org.antlr.runtime.tree
Interface TreeVisitorAction

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.

Method Summary

Object	post(Object t) Execute an action after visiting children of t.
Object	pre(Object t) Execute an action before visiting children of t.

Method Detail

pre

Object pre(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().

post

Object post(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.