[antlr-interest] valid grammar does not compile

[D. Frej]

Hi,

I build the following grammar with antlrworks:

grammar questionmark;

horef
    :    '\?' ('a'..'z')
    ;

antlrworks tells me "check grammar succeeded". However, debugging does not 
works because the generated code does not compile !?

My question: how does the rule have to look like so that the code compile? 
I want to parse text of the form ?a which should be a trivial task for 
antlr.

Thanks,

Didi    
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