gcc/testsuite/g++.old-deja/g++.gb/scope06.C

// { dg-do assemble  }
// GROUPS passed gb scope
struct C {
  struct D {
    int x;
    void foo ();
  };
  const int Ok = 0; // { dg-error "" "" { target { ! c++11 } } } initialization forbidden
};

void C::D::foo ()
{
  x = Ok;			// { dg-error "non-static" }
}