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.
test0()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.
test1()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.
test3()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