[antlr-interest] Constants in AST

[Brisard, Fred D]

Is there a simple way to insert constants into an AST?  It seems like
the operators require anything being inserted into an AST node to be
either a lexical token or a parser rule.  

I just want to put a simple constant in a node so that I can search on
it later.  Maybe that's a bad idea so it isn't supported.

I did notice that I could define fragment lexical tokens that could be
inserted.

Thanks for any clarification or suggestions.

Regards, Fred

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