[antlr-interest] Parse trees visualization tools?

[guillot.bernard at hit.com.hk]

Elias,

	A good Visualization of the parsed tree is built in ANTLR. It is
called ASTFrame.

You can Easily View And Debug Your Parsed Tree with it.

Hope This can Help You.

Bernard Guillot


Here is an Extract of some code I use (taken from an example in the antlr
code)

/* 
	Code 1 Easy to view What the Tree Viewer will look like

// This is a simple Tree To look how simple it can look
// Create the tree nodes
ASTFactory factory = new ASTFactory();
CommonAST r = (CommonAST)factory.create(0, "ROOT");
r.addChild((CommonAST)factory.create(0, "C1"));
r.addChild((CommonAST)factory.create(0, "C2"));
r.addChild((CommonAST)factory.create(0, "C3"));

ASTFrame frame = new ASTFrame("AST JTree Example", r);
frame.setVisible(true);

// End of Simple Test

*/


/*
	Code 2 A Real Example
*/

			
String Filename filename="Myfile";
File file = new File ("/pathtomyfile/" + filename);
InputStream inStream = new InputStream(file);

MyLexer lexer = new MyLexer(inStream);
lexer.setFilename(filename);

// Create a parser that reads from the scanner
MyParser parser = new MyParser(lexer);
parser.setFilename(filename);

showTree=1;	// Change or get it as a parameter when calling this class

// do something with the tree

if ( showTree ) {
				
	System.out.println("Will Show the AST Tree");

	// Real Example of Tree Viewing
	
      ((CommonAST)t).setVerboseStringConversion(true,
parser.getTokenNames());
      ASTFactory factory = new ASTFactory();
      AST r = factory.create(0,"AST ROOT");
      r.setFirstChild(parser.getAST());
      final ASTFrame frame = new ASTFrame("Java AST", r);
      frame.setVisible(true);
      frame.addWindowListener(
	      new WindowAdapter() {
      		public void windowClosing (WindowEvent e) {
            		frame.setVisible(false); // hide the Frame
				frame.dispose();
	                  System.exit(0);
      	      }
      	}
	);

}


-----Original Message-----
From: Elias Biris [mailto:user_sofia at biris.freeserve.co.uk] 
Sent: 20 August, 2002 1:54 PM
To: antlr-interest at yahoogroups.com
Subject: [antlr-interest] Parse trees visualization tools?


Hi,

I am looking for any tools that allow generation/visualization of graphical
representations of parse trees based on antlr or yacc grammars. Does anyone
know of any such tool?

Thanks




 

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