[antlr-interest] Exception when generating tree grammar

[Luigi Iannone]

Hi all,

the purpose of the following grammar is to simplify trees. The idea is to remove CONJUNCTION and DISJUNCTION nodes that have only one child



 tree grammar ManchesterOWLSyntaxSimplify;

options {
  language = Java;
  tokenVocab = ManchesterOWLSyntax;
  ASTLabelType = ManchesterOWLSyntaxTree;
  filter=true;
  output= AST;
}

@header {
  package org.coode.parsers;
}

bottomup  : 
    conjunction 
    |	disjunction
  
  ;
   
conjunction :
  ^(CONJUNCTION single= .) -> ^($single)
  ;
 
disjunction  :
	^(DISJUNCTION single= .) -> ^($single) 
	; 
 
 
However when I try to generate the code with ANTRLWorks 1.4.2 I get the exception pasted below.
What am I doing wrong?

Thanks in advance,

Luigi



[17:07:50] error(10):  internal error: /Users/luigi/Documents/workspace/Parsers/src/ManchesterOWLSyntaxSimplify.g : java.lang.IllegalArgumentException: Can't find template rewriteWildcardLabelRefRoot.st; group hierarchy is [Java]
org.antlr.stringtemplate.StringTemplateGroup.lookupTemplate(StringTemplateGroup.java:507)
org.antlr.stringtemplate.StringTemplateGroup.getInstanceOf(StringTemplateGroup.java:392)
org.antlr.stringtemplate.StringTemplateGroup.getInstanceOf(StringTemplateGroup.java:404)
org.antlr.stringtemplate.StringTemplateGroup.lookupTemplate(StringTemplateGroup.java:484)
org.antlr.stringtemplate.StringTemplateGroup.getInstanceOf(StringTemplateGroup.java:392)
org.antlr.stringtemplate.StringTemplateGroup.getInstanceOf(StringTemplateGroup.java:404)
org.antlr.stringtemplate.StringTemplateGroup.lookupTemplate(StringTemplateGroup.java:484)
org.antlr.stringtemplate.StringTemplateGroup.getInstanceOf(StringTemplateGroup.java:392)
org.antlr.stringtemplate.StringTemplateGroup.getInstanceOf(StringTemplateGroup.java:404)
org.antlr.grammar.v2.CodeGenTreeWalker.rewrite_atom(CodeGenTreeWalker.java:3068)
org.antlr.grammar.v2.CodeGenTreeWalker.rewrite_tree(CodeGenTreeWalker.java:3193)
org.antlr.grammar.v2.CodeGenTreeWalker.rewrite_element(CodeGenTreeWalker.java:2666)
org.antlr.grammar.v2.CodeGenTreeWalker.rewrite_alternative(CodeGenTreeWalker.java:2521)
org.antlr.grammar.v2.CodeGenTreeWalker.rewrite(CodeGenTreeWalker.java:1422)
org.antlr.grammar.v2.CodeGenTreeWalker.block(CodeGenTreeWalker.java:1084)
org.antlr.grammar.v2.CodeGenTreeWalker.rule(CodeGenTreeWalker.java:797)
org.antlr.grammar.v2.CodeGenTreeWalker.rules(CodeGenTreeWalker.java:588)
org.antlr.grammar.v2.CodeGenTreeWalker.grammarSpec(CodeGenTreeWalker.java:530)
org.antlr.grammar.v2.CodeGenTreeWalker.grammar(CodeGenTreeWalker.java:336)
org.antlr.codegen.CodeGenerator.genRecognizer(CodeGenerator.java:430)
org.antlr.Tool.generateRecognizer(Tool.java:642)
org.antlr.Tool.process(Tool.java:455)
org.antlr.works.generate.CodeGenerate.generate(CodeGenerate.java:104)
org.antlr.works.generate.CodeGenerate.run(CodeGenerate.java:185)
java.lang.Thread.run(Thread.java:680)