[antlr-interest] Tree grammar example, redux

[J. Stephen Riley Silber]

Hi gang,

Frank mentioned the second example in this article (http://www.antlr.org/wiki/display/ANTLR3/Simple+tree-based+interpeter) not working as of 3.1.3.  I, too, have been trying to get it working, to no avail.

Did something fundamental change in the TreeNodeStream functionality?  I like this solution much better than spawning new tree parsers every time a function is called.

What's the dillio?

Thanks,
--Stephen
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