[antlr-interest] Objective-C tree grammars with 3.0.1

[Basil Shkara]

Hi,

I have built an AST and am currently trying to generate my tree  
grammar but when I run the antlr tool, I get the below errors.
I haven't defined an ASTLabelType.  From my understanding it would be  
ANTLRCommonTree however entering that causes xcode to fail on build  
because the generated code does not correctly insert pointers.
In any case, I do not think that is the issue.
Does v3.0.1 contain objective-c support for generating tree grammars?
Any help appreciated!

Thanks!

warning(152): Eval.g:0:0: tree grammar Eval has no ASTLabelType option
error(10):  internal error: Eval.g : java.util.NoSuchElementException:  
no such attribute: ANTLRASTLabelType in template context [outputFile  
treeParser genericParser(...) rule ruleLabelDefs anonymous  
<treeParser's arg labelType default value subtemplate>]
org 
.antlr 
.stringtemplate 
.StringTemplate 
.checkNullAttributeAgainstFormalArguments(StringTemplate.java:1290)
org.antlr.stringtemplate.StringTemplate.get(StringTemplate.java:814)
org.antlr.stringtemplate.StringTemplate.get(StringTemplate.java:812)
org.antlr.stringtemplate.StringTemplate.get(StringTemplate.java:812)
org.antlr.stringtemplate.StringTemplate.get(StringTemplate.java:812)
org.antlr.stringtemplate.StringTemplate.get(StringTemplate.java:812)
org.antlr.stringtemplate.StringTemplate.get(StringTemplate.java:812)
org 
.antlr.stringtemplate.StringTemplate.getAttribute(StringTemplate.java: 
696)
org 
.antlr 
.stringtemplate 
.language.ActionEvaluator.attribute(ActionEvaluator.java:355)
org 
.antlr 
.stringtemplate.language.ActionEvaluator.expr(ActionEvaluator.java:131)
org 
.antlr 
.stringtemplate.language.ActionEvaluator.action(ActionEvaluator.java:79)
org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:152)
org.antlr.stringtemplate.StringTemplate.write(StringTemplate.java:714)
org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:722)
org.antlr.stringtemplate.language.ASTExpr.writeAttribute(ASTExpr.java: 
659)
org 
.antlr 
.stringtemplate.language.ActionEvaluator.action(ActionEvaluator.java:81)
org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:152)
org.antlr.stringtemplate.StringTemplate.write(StringTemplate.java:714)
org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:722)
org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:742)
org.antlr.stringtemplate.language.ASTExpr.writeAttribute(ASTExpr.java: 
659)
org 
.antlr 
.stringtemplate.language.ActionEvaluator.action(ActionEvaluator.java:81)
org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:152)
org.antlr.stringtemplate.StringTemplate.write(StringTemplate.java:714)
org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:722)
org.antlr.stringtemplate.language.ASTExpr.writeAttribute(ASTExpr.java: 
659)
org 
.antlr 
.stringtemplate.language.ActionEvaluator.action(ActionEvaluator.java:81)
org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:152)
org.antlr.stringtemplate.StringTemplate.write(StringTemplate.java:714)
org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:722)
org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:742)
org.antlr.stringtemplate.language.ASTExpr.writeAttribute(ASTExpr.java: 
659)
org 
.antlr 
.stringtemplate.language.ActionEvaluator.action(ActionEvaluator.java:81)
org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:152)
org.antlr.stringtemplate.StringTemplate.write(StringTemplate.java:714)
org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:722)
org.antlr.stringtemplate.language.ASTExpr.writeAttribute(ASTExpr.java: 
659)
org 
.antlr 
.stringtemplate.language.ActionEvaluator.action(ActionEvaluator.java:81)
org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:152)
org.antlr.stringtemplate.StringTemplate.write(StringTemplate.java:714)
org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:722)
org.antlr.stringtemplate.language.ASTExpr.writeAttribute(ASTExpr.java: 
659)
org 
.antlr 
.stringtemplate.language.ActionEvaluator.action(ActionEvaluator.java:81)
org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:152)
org.antlr.stringtemplate.StringTemplate.write(StringTemplate.java:714)
org.antlr.codegen.CodeGenerator.write(CodeGenerator.java:1132)
org.antlr.codegen.Target.genRecognizerFile(Target.java:94)
org.antlr.codegen.CodeGenerator.genRecognizer(CodeGenerator.java:439)
org.antlr.Tool.processGrammar(Tool.java:347)
org.antlr.Tool.process(Tool.java:268)
org.antlr.Tool.main(Tool.java:70)