41 lines · cpp
1// RUN: %clang_cc1 -fsyntax-only -Wsigned-enum-bitfield -verify %s --std=c++112 3// Enums used in bitfields with no explicitly specified underlying type.4void 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.17void 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.30void 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