llvm-project/clang/test/Preprocessor/macro_rescan2.c

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// RUN: clang %s -E | grep 'a: 2\*f(9)' &&
// RUN: clang %s -E | grep 'b: 2\*9\*g'
#define f(a) a*g
#define g f
a: f(2)(9)
#undef f
#undef g
#define f(a) a*g
#define g(a) f(a)
b: f(2)(9)