package org.jostraca.comp.antlr;
/* ANTLR Translator Generator
* Project led by Terence Parr at http://www.jGuru.com
* Software rights: http://www.antlr.org/license.html
*
* $Id: DumpASTVisitor.java,v 1.3 2004/11/19 17:50:49 rjrodger Exp $
*/
import java.io.*;
import org.jostraca.comp.antlr.collections.AST;
/** Simple class to dump the contents of an AST to the output */
public class DumpASTVisitor implements ASTVisitor {
protected int level = 0;
private void tabs() {
for (int i = 0; i < level; i++) {
System.out.print(" ");
}
}
public void visit(AST node) {
// Flatten this level of the tree if it has no children
boolean flatten = /*true*/ false;
AST node2;
for (node2 = node; node2 != null; node2 = node2.getNextSibling()) {
if (node2.getFirstChild() != null) {
flatten = false;
break;
}
}
for (node2 = node; node2 != null; node2 = node2.getNextSibling()) {
if (!flatten || node2 == node) {
tabs();
}
if (node2.getText() == null) {
System.out.print("nil");
}
else {
System.out.print(node2.getText());
}
System.out.print(" [" + node2.getType() + "] ");
if (flatten) {
System.out.print(" ");
}
else {
System.out.println("");
}
if (node2.getFirstChild() != null) {
level++;
visit(node2.getFirstChild());
level--;
}
}
if (flatten) {
System.out.println("");
}
}
}