ParentVisitor.java

/*
 * Copyright (C) 2007  Reto Schuettel, Robin Stocker
 *
 * IFS Institute for Software, HSR Rapperswil, Switzerland
 *
 */

package org.python.pydev.refactoring.ast.visitors;

import org.python.pydev.core.structure.FastStack;
import org.python.pydev.parser.jython.SimpleNode;
import org.python.pydev.parser.jython.ast.VisitorBase;

public class ParentVisitor extends VisitorBase {
    protected FastStack<SimpleNode> stack = new FastStack<SimpleNode>(20);

    public ParentVisitor() {
        stack.push(null);
    }

    @Override
    public void traverse(SimpleNode node) throws Exception {
        node.parent = stack.peek();
        stack.push(node);
        node.traverse(this);
        stack.pop();
    }

    @Override
    protected Object unhandled_node(SimpleNode node) throws Exception {
        return null;
    }
}