Still some things to learn from Clang though.
e.g. it still directly builds an AST instead of using some kind of
interface.
I'm very interested in what you mean here. Do you have a link or can you
write an explaination ?
Clang decouples the parser from AST construction by letting the parser
take an interface class that has a virtual method for everything that is
parsed along the lines of ActOnStartOfFunctionDef().
So a client that doesn't need an AST doesn't have to build one.
Don't know if it's properly implemented in Clang now though.
