I don't see any parsing in TFA - I think they are taking a bottom-up approach by starting with a code generation library before even thinking about parsing. I

I don't see any parsing in TFA - I think they are taking a bottom-up approach by starting with a code generation library before even thinking about parsing. I like this approach because it produces something that generates usable code without worrying about things like parsing or high level language syntax, and you've basically written a DSL/intermediate format which can be compiled by an existing C compiler.