p11.0x.copy.cpp revision 7bd67854cfa59699e0efe72244af1578f2a1c09e 
1// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
2
3struct Trivial {};
4struct NonTrivial {
5  NonTrivial(const NonTrivial&);
6};
7
8// A defaulted copy constructor for a class X is defined as deleted if X has:
9
10// -- a variant member with a non-trivial corresponding constructor
11union DeletedNTVariant {
12  NonTrivial NT; // expected-note{{copy constructor of 'DeletedNTVariant' is implicitly deleted because variant field 'NT' has a non-trivial copy constructor}}
13  DeletedNTVariant();
14};
15DeletedNTVariant DVa;
16DeletedNTVariant DVb(DVa); // expected-error{{call to implicitly-deleted copy constructor}}
17
18struct DeletedNTVariant2 {
19  union {
20    NonTrivial NT; // expected-note{{copy constructor of 'DeletedNTVariant2' is implicitly deleted because variant field 'NT' has a non-trivial copy constructor}}
21  };
22  DeletedNTVariant2();
23};
24DeletedNTVariant2 DV2a;
25DeletedNTVariant2 DV2b(DV2a); // expected-error{{call to implicitly-deleted copy constructor}}
26
27// -- a non-static data member of class type M (or array thereof) that cannot be
28//    copied because overload resolution results in an ambiguity or a function
29//    that is deleted or inaccessible
30struct NoAccess {
31  NoAccess() = default;
32private:
33  NoAccess(const NoAccess&);
34
35  friend struct HasAccess;
36};
37
38struct HasNoAccess {
39  NoAccess NA; // expected-note{{copy constructor of 'HasNoAccess' is implicitly deleted because field 'NA' has an inaccessible copy constructor}}
40};
41HasNoAccess HNAa;
42HasNoAccess HNAb(HNAa); // expected-error{{call to implicitly-deleted copy constructor}}
43
44struct HasAccess {
45  NoAccess NA;
46};
47
48HasAccess HAa;
49HasAccess HAb(HAa);
50
51struct NonConst {
52  NonConst(NonConst&);
53};
54struct Ambiguity {
55  Ambiguity(const Ambiguity&);
56  Ambiguity(volatile Ambiguity&);
57};
58
59struct IsAmbiguous {
60  NonConst NC;
61  Ambiguity A; // expected-note 2{{copy constructor of 'IsAmbiguous' is implicitly deleted because field 'A' has multiple copy constructors}}
62  IsAmbiguous();
63};
64IsAmbiguous IAa;
65IsAmbiguous IAb(IAa); // expected-error{{call to implicitly-deleted copy constructor}}
66
67struct Deleted {
68  IsAmbiguous IA; // expected-note{{copy constructor of 'Deleted' is implicitly deleted because field 'IA' has a deleted copy constructor}}
69};
70Deleted Da;
71Deleted Db(Da); // expected-error{{call to implicitly-deleted copy constructor}}
72
73// It's implied (but not stated) that this also applies in the case where
74// overload resolution would fail.
75struct VolatileMember {
76  volatile Trivial vm; // expected-note {{has no copy}}
77} vm1, vm2(vm1); // expected-error {{deleted}}
78
79// -- a direct or virtual base class B that cannot be copied because overload
80//    resolution results in an ambiguity or a function that is deleted or
81//    inaccessible
82struct AmbiguousCopyBase : Ambiguity { // expected-note 2{{copy constructor of 'AmbiguousCopyBase' is implicitly deleted because base class 'Ambiguity' has multiple copy constructors}}
83  NonConst NC;
84};
85extern AmbiguousCopyBase ACBa;
86AmbiguousCopyBase ACBb(ACBa); // expected-error {{deleted copy constructor}}
87
88struct DeletedCopyBase : AmbiguousCopyBase {}; // expected-note {{copy constructor of 'DeletedCopyBase' is implicitly deleted because base class 'AmbiguousCopyBase' has a deleted copy constructor}}
89extern DeletedCopyBase DCBa;
90DeletedCopyBase DCBb(DCBa); // expected-error {{deleted copy constructor}}
91
92struct InaccessibleCopyBase : NoAccess {}; // expected-note {{copy constructor of 'InaccessibleCopyBase' is implicitly deleted because base class 'NoAccess' has an inaccessible copy constructor}}
93extern InaccessibleCopyBase ICBa;
94InaccessibleCopyBase ICBb(ICBa); // expected-error {{deleted copy constructor}}
95
96// -- any direct or virtual base class or non-static data member of a type with
97//    a destructor that is deleted or inaccessible
98struct NoAccessDtor {
99private:
100  ~NoAccessDtor();
101  friend struct HasAccessDtor;
102};
103
104struct HasNoAccessDtor {
105  NoAccessDtor NAD; // expected-note{{copy constructor of 'HasNoAccessDtor' is implicitly deleted because field 'NAD' has an inaccessible destructor}}
106  HasNoAccessDtor();
107  ~HasNoAccessDtor();
108};
109HasNoAccessDtor HNADa;
110HasNoAccessDtor HNADb(HNADa); // expected-error{{call to implicitly-deleted copy constructor}}
111
112struct HasAccessDtor {
113  NoAccessDtor NAD;
114};
115HasAccessDtor HADa;
116HasAccessDtor HADb(HADa);
117
118struct HasNoAccessDtorBase : NoAccessDtor { // expected-note{{copy constructor of 'HasNoAccessDtorBase' is implicitly deleted because base class 'NoAccessDtor' has an inaccessible destructor}}
119};
120extern HasNoAccessDtorBase HNADBa;
121HasNoAccessDtorBase HNADBb(HNADBa); // expected-error{{implicitly-deleted copy constructor}}
122
123// -- a non-static data member of rvalue reference type
124struct RValue {
125  int && ri = 1; // expected-note{{copy constructor of 'RValue' is implicitly deleted because field 'ri' is of rvalue reference type 'int &&'}}
126  // expected-warning@-1{{binding reference member 'ri' to a temporary}} expected-note@-1 {{here}}
127};
128RValue RVa;
129RValue RVb(RVa); // expected-error{{call to implicitly-deleted copy constructor}}
130
131namespace PR13381 {
132  struct S {
133    S(const S&);
134    S(const volatile S&) = delete; // expected-note{{deleted here}}
135  };
136  struct T {
137    volatile S s; // expected-note{{field 's' has a deleted copy constructor}}
138  };
139  T &f();
140  T t = f(); // expected-error{{call to implicitly-deleted copy constructor}}
141}
142