1 // RUN: %clang_cc1 -std=c++1y %s -verify
2 
3 namespace in_class_init {
4   union U { char c; double d = 4.0; };
5   constexpr U u1 = U();
6   constexpr U u2 {};
7   constexpr U u3 { 'x' };
8   static_assert(u1.d == 4.0, "");
9   static_assert(u2.d == 4.0, "");
10   static_assert(u3.c == 'x', "");
11 
12   struct A {
13     int n = 5;
14     int m = n * 3;
15     union {
16       char c;
17       double d = 4.0;
18     };
19   };
20   constexpr A a1 {};
21   constexpr A a2 { 8 };
22   constexpr A a3 { 1, 2, { 3 } };
23   constexpr A a4 { 1, 2, { .d = 3.0 } };
24   static_assert(a1.d == 4.0, "");
25   static_assert(a2.m == 24, "");
26   static_assert(a2.d == 4.0, "");
27   static_assert(a3.c == 3, "");
28   static_assert(a3.d == 4.0, ""); // expected-error {{constant expression}} expected-note {{active member 'c'}}
29   static_assert(a4.d == 3.0, "");
30 
31   struct B {
32     int n;
fin_class_init::B33     constexpr int f() { return n * 5; }
34     int m = f();
35   };
36   B b1 {};
37   constexpr B b2 { 2 };
38   B b3 { 1, 2 };
39   static_assert(b2.m == 10, "");
40 
41   struct C {
42     int k;
43     union {
44       int l = k; // expected-error {{invalid use of non-static}}
45     };
46   };
47 }
48 
49 namespace nested_aggregate_init {
50   struct A {
51     int n = 5;
52     int b = n * 3;
53   };
54   struct B {
Bnested_aggregate_init::B55     constexpr B(int k) : d(1.23), k(k) {}
56     // Within this aggregate, both this object's 'this' and the temporary's
57     // 'this' are used.
fnested_aggregate_init::B58     constexpr int f() const { return A{k}.b; }
59     double d;
60     int k;
61   };
62   static_assert(B(6).f() == 18, "");
63 }
64