// RUN: clang-cc -E %s | grep '1: aaab 2' && | |
// RUN: clang-cc -E %s | grep '2: 2 baaa' && | |
// RUN: clang-cc -E %s | grep '3: 2 xx' | |
#define a(n) aaa ## n | |
#define b 2 | |
1: a(b b) // aaab 2 2 gets expanded, not b. | |
#undef a | |
#undef b | |
#define a(n) n ## aaa | |
#define b 2 | |
2: a(b b) // 2 baaa 2 gets expanded, not b. | |
#define baaa xx | |
3: a(b b) // 2 xx | |