DumpASTVisitor.cs :  » Inversion-of-Control-Dependency-Injection » Spring.net » Spring » Expressions » Parser » antlr » C# / CSharp Open Source

using System;
using Spring.Expressions.Parser.antlr.collections;
using ASTSpring.Expressions.Parser.antlr.collections.AST;

namespace Spring.Expressions.Parser.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("");
      }
    }
  }  
}