clang/test/Preprocessor/macro_fn_comma_swallow.c

   1 // Test the GNU comma swallowing extension.
   2 // RUN: %clang_cc1 %s -E | FileCheck -strict-whitespace %s
   3
   4 // CHECK: 1: foo{A, }
   5 #define X(Y) foo{A, Y}
   6 1: X()
   7
   8
   9 // CHECK: 2: fo2{A,}
  10 #define X2(Y) fo2{A,##Y}
  11 2: X2()
  12
  13 // should eat the comma.
  14 // CHECK: 3: {foo}
  15 #define X3(b, ...) {b, ## __VA_ARGS__}
  16 3: X3(foo)
  17
  18
  19
  20 // PR3880
  21 // CHECK: 4: AA BB
  22 #define X4(...)  AA , ## __VA_ARGS__ BB
  23 4: X4()
  24
  25 // PR7943
  26 // CHECK: 5: 1
  27 #define X5(x,...) x##,##__VA_ARGS__
  28 5: X5(1)