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      1 // RUN: %clang_cc1 %s -E | FileCheck -strict-whitespace %s
      2 // Check for C99 6.10.3.4p2.
      3 
      4 #define f(a) f(x * (a))
      5 #define x 2
      6 #define z z[0]
      7 f(f(z));
      8 // CHECK: f(2 * (f(2 * (z[0]))));
      9 
     10 
     11 
     12 #define A A B C
     13 #define B B C A
     14 #define C C A B
     15 A
     16 // CHECK: A B C A B A C A B C A
     17 
     18 
     19 // PR1820
     20 #define i(x) h(x
     21 #define h(x) x(void)
     22 extern int i(i));
     23 // CHECK: int i(void)
     24 
     25 
     26 #define M_0(x) M_ ## x
     27 #define M_1(x) x + M_0(0)
     28 #define M_2(x) x + M_1(1)
     29 #define M_3(x) x + M_2(2)
     30 #define M_4(x) x + M_3(3)
     31 #define M_5(x) x + M_4(4)
     32 
     33 a: M_0(1)(2)(3)(4)(5);
     34 b: M_0(5)(4)(3)(2)(1);
     35 
     36 // CHECK: a: 2 + M_0(3)(4)(5);
     37 // CHECK: b: 4 + 4 + 3 + 2 + 1 + M_0(3)(2)(1);
     38 
     39 #define n(v) v
     40 #define l m
     41 #define m l a
     42 c: n(m) X
     43 // CHECK: c: m a X
     44