Me: what are you interested in? Student: wouldn't it be cool if you could specify source-to-source translations for languages like c++ by defining the operations at the AST level, after they're parsed?
Me: AST level <=> s-expressions. Everyone who tries this eventually decides that it's easier to simply write their programs in the AST language (a.k.a. s-expressions). So here's my question: is there a good *survey* of syntax & hygienic macro systems that tries to provide some insight into what we've learned? I don't think PLAI or 2nd edition EoPL try to do this. John
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