clang/test/SemaCXX/enum-bitfield.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -pedantic -std=c++11 -verify -triple x86_64-apple-darwin %s
   2
   3 enum E {};
   4
   5 struct Z {};
   6 typedef int Integer;
   7
   8 struct X {
   9   enum E : 1; // expected-error{{anonymous bit-field}}
  10   enum E : Z; // expected-error{{invalid underlying type}}
  11   enum E2 : int;
  12   enum E3 : Integer;
  13 };
  14
  15 struct Y {
  16   enum E : int(2); // expected-error{{anonymous bit-field}}
  17   enum E : Z(); // expected-error{{anonymous bit-field}} expected-error{{integral constant expression must have integral or unscoped enumeration type, not 'Z'}}
  18 };
  19
  20 namespace pr18587 {
  21 struct A {
  22   enum class B {
  23     C
  24   };
  25 };
  26 const int C = 4;
  27 struct D {
  28   A::B : C;
  29 };
  30 }
  31
  32 enum WithUnderlying : unsigned { wu_value };
  33 struct WithUnderlyingBitfield {
  34   WithUnderlying wu : 3;
  35 } wu = { wu_value };
  36 int want_unsigned(unsigned);
  37 int want_unsigned(int) = delete;
  38 int check_enum_bitfield_promotes_correctly = want_unsigned(wu.wu);