ANTLR3 runtime metadata

How can I know during parsing which rule is currently matched? I'd like to automatically build an XML (or other objectal hierarchy) representing the parsed input, using rule names, with开发者_运维问答out the need of using grammar actions or trees.

Is this possible?

Many thanks, Yaakov

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AFAIK, that is not possible. But why don't you use ANTLR's built in tree construction? In the options{ } part of your grammar, add output=AST; and use rewrite rules where applicable. See: http://www.antlr.org/wiki/display/~admin/2008/11/30/Example+tree+rewriting+with+patterns