[antlr-interest] token return values

[Karl Meissner]

Terrance 

Since you are thinking about 3.0, I thought I might throw out one more suggestion. 

In the version I am using only protected token rules can have return values.   The documentation
notes this is mostly an artifact of how tokens are processed by the next function of the lexer. 

Have you thought about using generic templates as the base class of Token?

That way you can stuff a value into a token during a token rule and get it out easily during
higher level processing.   But it 
still follows all the interfaces for a token. 

Karl


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