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      1 // RUN: %clang_cc1 -fsyntax-only -verify -pedantic %s
      2 
      3 union u { int i; unsigned : 3; };
      4 void f(union u);
      5 
      6 void test(int x) {
      7   f((union u)x); // expected-warning {{C99 forbids casts to union type}}
      8   f((union u)&x); // expected-error {{cast to union type from type 'int *' not present in union}}
      9   f((union u)2U); // expected-error {{cast to union type from type 'unsigned int' not present in union}}
     10 }
     11 
     12 union u w = (union u)2; // expected-warning {{C99 forbids casts to union type}}
     13 union u ww = (union u)1.0; // expected-error{{cast to union type from type 'double' not present in union}}
     14 union u x = 7; // expected-error{{initializing 'union u' with an expression of incompatible type 'int'}}
     15 int i;
     16 union u zz = (union u)i; // expected-error{{initializer element is not a compile-time constant}}  expected-warning {{C99 forbids casts to union type}}
     17 
     18 struct s {int a, b;};
     19 struct s y = { 1, 5 };
     20 struct s z = (struct s){ 1, 5 };
     21