gcc/testsuite/g++.dg/cpp0x/constexpr-union.C

   1 // Test that we don't have to deal with type punning
   2 // FIXME Mike Miller thinks it should work
   3 // { dg-options -std=c++0x }
   4
   5 union U
   6 {
   7   float f;
   8   unsigned char ca[sizeof(float)];
   9 };
  10
  11 constexpr U u = { 1.0 };
  12 constexpr float f = u.f;
  13 constexpr unsigned char c = u.ca[0]; // { dg-error "U::ca" }
  14
  15 constexpr double d = 1.0;
  16 constexpr unsigned char c2 = (unsigned char&)d; // { dg-error "char. glvalue" }