p8-0x.cpp revision 6fe2965ce722826ae7c3af85271f900286ef20c3 
1// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
2
3int n;
4struct S {
5  int &a; // expected-note 2{{here}}
6  int &b = n;
7
8  union {
9    const int k = 42;
10  };
11
12  S() {} // expected-error {{constructor for 'S' must explicitly initialize the reference member 'a'}}
13  S(int) : a(n) {} // ok
14  S(char) : b(n) {} // expected-error {{constructor for 'S' must explicitly initialize the reference member 'a'}}
15  S(double) : a(n), b(n) {} // ok
16} s(0);
17
18union U {
19  int a = 0; // desired-note 5 {{previous initialization is here}}
20  char b = 'x';
21
22  // FIXME: these should all be rejected
23  U() {} // desired-error {{initializing multiple members of union}}
24  U(int) : a(1) {} // desired-error {{initializing multiple members of union}}
25  U(char) : b('y') {} // desired-error {{initializing multiple members of union}}
26  // this expected note should be removed & the note should appear on the
27  // declaration of 'a' when this set of cases is handled correctly.
28  U(double) : a(1), // expected-note{{previous initialization is here}} desired-error {{initializing multiple members of union}}
29              b('y') {} // expected-error{{initializing multiple members of union}}
30};
31
32// PR10954: variant members do not acquire an implicit initializer.
33namespace VariantMembers {
34  struct NoDefaultCtor {
35    NoDefaultCtor(int);
36  };
37  union V {
38    NoDefaultCtor ndc;
39    int n;
40
41    V() {}
42    V(int n) : n(n) {}
43    V(int n, bool) : ndc(n) {}
44  };
45  struct K {
46    union {
47      NoDefaultCtor ndc;
48      int n;
49    };
50    K() {}
51    K(int n) : n(n) {}
52    K(int n, bool) : ndc(n) {}
53  };
54  struct Nested {
55    Nested() {}
56    union {
57      struct {
58        NoDefaultCtor ndc;
59      };
60    };
61  };
62}
63