[antlr-interest] Tree parser
rkevinburton at charter.net
rkevinburton at charter.net
Thu Jul 31 12:04:57 PDT 2008
There must be some changes to the grammar as well. The lines:
ECMAScriptWalker walker = new ECMAScriptWalker(nodes);
RuleReturnScope rs = walker.program();
Console.Out.WriteLine(rs.Template.ToString());
It seems that my walker start rule does not return RuleReturnScope.
Kevin
---- Johannes Luber <jaluber at gmx.de> wrote:
> 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
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