Re: %union, C++, symbol types

[Evan Lavelle]

Thanks for the input on this. I can't really use the pointer solutions, 
so my current fix is to define YYSTYPE as a struct, rather than a union, 
and to pass around classes in the struct. This seems to work well, 
though it's inefficient.

The reason that reference counting is required here is that the lexer 
produces a token class, rather than AST nodes, and a single token might 
eventually appear multiple times (or not at all) in the AST.

Thanks -

Evan