1 // RUN: %clang_cc1 -fsyntax-only -Wsigned-enum-bitfield -verify %s --std=c++11
2 
3 // Enums used in bitfields with no explicitly specified underlying type.
4 void test0() {
5   enum E { E1, E2 };
6   enum F { F1, F2 };
7   struct { E e1 : 1; E e2; F f1 : 1; F f2; } s;
8 
9   s.e1 = E1; // expected-warning {{enums in the Microsoft ABI are signed integers by default; consider giving the enum E an unsigned underlying type to make this code portable}}
10   s.f1 = F1; // expected-warning {{enums in the Microsoft ABI are signed integers by default; consider giving the enum F an unsigned underlying type to make this code portable}}
11 
12   s.e2 = E2;
13   s.f2 = F2;
14 }
15 
16 // Enums used in bitfields with an explicit signed underlying type.
17 void test1() {
18   enum E : signed { E1, E2 };
19   enum F : long { F1, F2 };
20   struct { E e1 : 1; E e2; F f1 : 1; F f2; } s;
21 
22   s.e1 = E1;
23   s.f1 = F1;
24 
25   s.e2 = E2;
26   s.f2 = F2;
27 }
28 
29 // Enums used in bitfields with an explicitly unsigned underlying type.
30 void test3() {
31   enum E : unsigned { E1, E2 };
32   enum F : unsigned long { F1, F2 };
33   struct { E e1 : 1; E e2; F f1 : 1; F f2; } s;
34 
35   s.e1 = E1;
36   s.f1 = F1;
37 
38   s.e2 = E2;
39   s.f2 = F2;
40 }
41