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) 29