4   union U { char c; double d = 4.0; };  member
17       double d = 4.0;  member
31   struct B {  struct
32     int n;
33     constexpr int f() { return n * 5; }  in f()
34     int m = f();
54   struct B {  struct
55     constexpr B(int k) : d(1.23), k(k) {}  in B()  argument
58     constexpr int f() const { return A{k}.b; }  in f()
59     double d;  member
60     int k;