[antlr-interest] Tree parser

[Johannes Luber]

rkevinburton at charter.net schrieb:
> I would like to generate a tree parser. Unfortunateliy the ANTLR book has very little to say of the issue (or I just don't know where to look) and the sample grammars that I see seem to implement the 'walker' different from the way ANTLR does it now. For example in the CSharp grammar there is syntax like (the 'walker grammar names are different):
> 
>                CSharpwalker = new CSharpWalker();
>                 walker.setASTFactory(new ASTNodeFactory());
>                 CSharpParser.initializeASTFactory(walker.getASTFactory());
> 
> where the constructor for the waler no longer takes '0' arguments. There isn't a method 'setASTFactory' and there also isn't a method 'initializedASTFactory'. If I have a TreeParser grammar how do I integrate it with the parser?
> 
> Thank you.
> 
> Kevin
> 
I don't know where the syntax above comes actually from, but my own tree 
grammar used a driver like this:

CSharpParser.grammarDef_return r = parser.startRule();
CommonTree r0 = ((CommonTree) r.tree);
CommonTreeNodeStream nodes = new CommonTreeNodeStream(r0);
nodes.TokenStream = tokens;
CSharpGenerator walker = new CSharpGenerator(nodes);
RuleReturnScope r1 = walker.startRule();
Console.Out.WriteLine(r1.Template.ToString());

Hope this helps