[antlr-interest] tree grammar and list via +=

[Bastian Asam]

Hello again,
since you helped me nicely last time a have an other question:

Is it now possible to use a list in a tree grammar? I found a mail from 
2007 saying it will be implemented soon.

But when I try it, I get a very long error Message.
Here is the grammar:

tree grammar TreeWalker;
options{
        language=C;
        tokenVocab=Grammar;
        output=AST;
        ASTLabelType=pANTLR3_BASE_TREE;
}
...
idrefs : list+=id+ ;
...

When generating the code, I get this:
error(10): internal error: /TreeWalker.g :
java.util.NoSuchElementException: template listLabelAST has no such 
attribute: elem in template context [outputFile treeParser 
genericParser(...) rule ruleBlockSingleAlt alt element 
positiveClosureBlock altSwitchCase alt element ruleRefAndListLabel <invoke 
listLabelAST arg context>]
...

Sounds to me like I cannot use a list with output AST, but when I set 
output to template I get:
error(10): internal error: no such group file ST.stg

output=AST would be neccessary anyway.

Any suggestions? Thanks in advance
Bastian





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