1 // RUN: %clang_cc1 -E %s | FileCheck -strict-whitespace %s 2 3 #define hash_hash # ## # 4 #define mkstr(a) # a 5 #define in_between(a) mkstr(a) 6 #define join(c, d) in_between(c hash_hash d) 7 char p[] = join(x, y); 8 9 // CHECK: char p[] = "x ## y"; 10 11