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{-# LANGUAGE CPP #-} module ClangCppBug where foo :: Int foo = 1 -- Clang doesn't mind these: #define BAX 2 {-# INLINE bar #-} bar :: Int bar = 3 -- But it doesn't like this: {-# RULES "bar/qux" bar = qux "qux/foo" qux = foo #-} qux :: Int qux = 88