1// RUN: %clang_cc1 -E %s | grep '1: aaab 2'
2// RUN: %clang_cc1 -E %s | grep '2: 2 baaa'
3// RUN: %clang_cc1 -E %s | grep '3: 2 xx'
4
5#define a(n) aaa ## n
6#define b 2
71: a(b b)   // aaab 2    2 gets expanded, not b.
8
9#undef a
10#undef b
11#define a(n) n ## aaa
12#define b 2
132: a(b b)   // 2 baaa    2 gets expanded, not b.
14
15#define baaa xx
163: a(b b)   // 2 xx
17
18