clang/test/CXX/conv/conv.prom/p5.cpp

   1 // RUN: %clang_cc1 -verify %s
   2 // expected-no-diagnostics
   3
   4 // A prvalue for an integral bit-field can be converted to a prvalue of type
   5 // int if int can represent all the values of the bit-field
   6 struct X { long long e : 1; };
   7 static_assert(sizeof(+X().e) == sizeof(int), "");
   8 static_assert(sizeof(X().e + 1) == sizeof(int), "");
   9 static_assert(sizeof(true ? X().e : 0) == sizeof(int), "");
  10
  11 enum E : long long { a = __LONG_LONG_MAX__ };
  12 static_assert(sizeof(E{}) == sizeof(long long), "");
  13
  14 // If the bit-field has an enumerated type, it is treated as any other value of
  15 // that [enumerated] type for promotion purposes.
  16 struct Y { E e : 1; };
  17 static_assert(sizeof(+Y().e) == sizeof(long long), "");
  18 static_assert(sizeof(Y().e + 1) == sizeof(long long), "");
  19 static_assert(sizeof(true ? Y().e : 0) == sizeof(long long), "");