clang/test/SemaCXX/warn-msvc-enum-bitfield.cpp

   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 }