source: trunk/yao/share/antlr-2.7.7/lib/csharp/antlr.runtime/antlr/DumpASTVisitor.cs @ 1

using System;

using AST                       = antlr.collections.AST;

namespace antlr
{
        /* ANTLR Translator Generator
         * Project led by Terence Parr at http://www.jGuru.com
         * Software rights: http://www.antlr.org/license.html
         *
         * $Id:$
         */

        //
        // ANTLR C# Code Generator by Micheal Jordan
        //                            Kunle Odutola       : kunle UNDERSCORE odutola AT hotmail DOT com
        //                            Anthony Oguntimehin
        //
        // With many thanks to Eric V. Smith from the ANTLR list.
        //
        
        /// <summary>
        /// Summary description for DumpASTVisitor.
        /// </summary>
        /** Simple class to dump the contents of an AST to the output */
        public class DumpASTVisitor : ASTVisitor 
        {
                protected int level = 0;


                private void tabs() 
                {
                        for (int i = 0; i < level; i++) 
                        {
                                Console.Out.Write("   ");
                        }
                }

                public void visit(AST node) 
                {
                        // Flatten this level of the tree if it has no children
                        bool 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) 
                                {
                                        Console.Out.Write("nil");
                                }
                                else 
                                {
                                        Console.Out.Write(node2.getText());
                                }

                                Console.Out.Write(" [" + node2.Type + "] ");

                                if (flatten) 
                                {
                                        Console.Out.Write(" ");
                                }
                                else 
                                {
                                        Console.Out.WriteLine("");
                                }

                                if (node2.getFirstChild() != null) 
                                {
                                        level++;
                                        visit(node2.getFirstChild());
                                        level--;
                                }
                        }

                        if (flatten) 
                        {
                                Console.Out.WriteLine("");
                        }
                }
        }  
}