blob: a7133d79b463f0e1cc00f891a2aed993378a850a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
// RUN: %clang_cc1 -std=c++1z -verify %s
struct Noncopyable {
Noncopyable();
Noncopyable(const Noncopyable &) = delete; // expected-note 1+{{deleted}} expected-note 1+ {{not viable}}
virtual ~Noncopyable();
};
struct Derived : Noncopyable {};
struct NoncopyableAggr { // expected-note 3{{candidate}}
Noncopyable nc;
};
struct Indestructible {
Indestructible();
~Indestructible() = delete; // expected-note 1+{{deleted}}
};
struct Incomplete; // expected-note 1+{{declar}}
Noncopyable make(int kind = 0) {
switch (kind) {
case 0: return {};
case 1: return Noncopyable();
case 2: return Noncopyable{};
case 3: return make();
}
__builtin_unreachable();
}
Indestructible make_indestructible();
Incomplete make_incomplete(); // expected-note 1+{{here}}
void take(Noncopyable nc) {}
Noncopyable nrvo() {
Noncopyable nrvo;
return nrvo; // expected-error {{deleted constructor}}
}
Noncopyable nc1 = make();
Noncopyable nc2 = Noncopyable();
Noncopyable nc3 = Derived(); // expected-error {{deleted constructor}}
Noncopyable nc4((Noncopyable()));
Noncopyable nc5 = {Noncopyable()};
Noncopyable nc6{Noncopyable()};
NoncopyableAggr nca1 = NoncopyableAggr{};
NoncopyableAggr nca2 = NoncopyableAggr{{}};
NoncopyableAggr nca3 = NoncopyableAggr{NoncopyableAggr{Noncopyable()}};
template<typename T> struct Convert { operator T(); }; // expected-note 1+{{candidate}}
Noncopyable conv1 = Convert<Noncopyable>();
Noncopyable conv2((Convert<Noncopyable>()));
Noncopyable conv3 = {Convert<Noncopyable>()};
Noncopyable conv4{Convert<Noncopyable>()};
Noncopyable ref_conv1 = Convert<Noncopyable&>(); // expected-error {{deleted constructor}}
Noncopyable ref_conv2((Convert<Noncopyable&>())); // expected-error {{deleted constructor}}
Noncopyable ref_conv3 = {Convert<Noncopyable&>()}; // expected-error {{deleted constructor}}
Noncopyable ref_conv4{Convert<Noncopyable&>()}; // expected-error {{deleted constructor}}
Noncopyable derived_conv1 = Convert<Derived>(); // expected-error {{deleted constructor}}
Noncopyable derived_conv2((Convert<Derived>())); // expected-error {{deleted constructor}}
Noncopyable derived_conv3 = {Convert<Derived>()}; // expected-error {{deleted constructor}}
Noncopyable derived_conv4{Convert<Derived>()}; // expected-error {{deleted constructor}}
NoncopyableAggr nc_aggr1 = Convert<NoncopyableAggr>();
NoncopyableAggr nc_aggr2((Convert<NoncopyableAggr>()));
NoncopyableAggr nc_aggr3 = {Convert<NoncopyableAggr>()}; // expected-error {{no viable conversion}}
NoncopyableAggr nc_aggr4{Convert<NoncopyableAggr>()}; // expected-error {{no viable conversion}}
NoncopyableAggr nc_aggr5 = Convert<Noncopyable>(); // expected-error {{no viable}}
NoncopyableAggr nc_aggr6((Convert<Noncopyable>())); // expected-error {{no matching constructor}}
NoncopyableAggr nc_aggr7 = {Convert<Noncopyable>()};
NoncopyableAggr nc_aggr8{Convert<Noncopyable>()};
void test_expressions(bool b) {
auto lambda = [a = make()] {};
take({});
take(Noncopyable());
take(Noncopyable{});
take(make());
Noncopyable &&dc1 = dynamic_cast<Noncopyable&&>(Noncopyable());
Noncopyable &&dc2 = dynamic_cast<Noncopyable&&>(nc1);
Noncopyable &&dc3 = dynamic_cast<Noncopyable&&>(Derived());
Noncopyable sc1 = static_cast<Noncopyable>(Noncopyable());
Noncopyable sc2 = static_cast<Noncopyable>(nc1); // expected-error {{deleted}}
Noncopyable sc3 = static_cast<Noncopyable&&>(Noncopyable()); // expected-error {{deleted}}
Noncopyable sc4 = static_cast<Noncopyable>(static_cast<Noncopyable&&>(Noncopyable())); // expected-error {{deleted}}
Noncopyable cc1 = (Noncopyable)Noncopyable();
Noncopyable cc2 = (Noncopyable)Derived(); // expected-error {{deleted}}
Noncopyable fc1 = Noncopyable(Noncopyable());
Noncopyable fc2 = Noncopyable(Derived()); // expected-error {{deleted}}
// We must check for a complete type for every materialized temporary. (Note
// that in the special case of the top level of a decltype, no temporary is
// materialized.)
make_incomplete(); // expected-error {{incomplete}}
make_incomplete().a; // expected-error {{incomplete}}
make_incomplete().*(int Incomplete::*)nullptr; // expected-error {{incomplete}}
dynamic_cast<Incomplete&&>(make_incomplete()); // expected-error {{incomplete}}
const_cast<Incomplete&&>(make_incomplete()); // expected-error {{incomplete}}
sizeof(Indestructible{}); // expected-error {{deleted}}
sizeof(make_indestructible()); // expected-error {{deleted}}
sizeof(make_incomplete()); // expected-error {{incomplete}}
typeid(Indestructible{}); // expected-error {{deleted}}
typeid(make_indestructible()); // expected-error {{deleted}}
typeid(make_incomplete()); // expected-error {{incomplete}}
// FIXME: The first two cases here are now also valid in C++17 onwards.
using I = decltype(Indestructible()); // expected-error {{deleted}}
using I = decltype(Indestructible{}); // expected-error {{deleted}}
using I = decltype(make_indestructible());
using J = decltype(make_incomplete());
Noncopyable cond1 = b ? Noncopyable() : make();
Noncopyable cond2 = b ? Noncopyable() : Derived(); // expected-error {{incompatible}}
Noncopyable cond3 = b ? Derived() : Noncopyable(); // expected-error {{incompatible}}
Noncopyable cond4 = b ? Noncopyable() : nc1; // expected-error {{deleted}}
Noncopyable cond5 = b ? nc1 : Noncopyable(); // expected-error {{deleted}}
// Could convert both to an xvalue of type Noncopyable here, but we're not
// permitted to consider that.
Noncopyable &&cond6 = b ? Noncopyable() : Derived(); // expected-error {{incompatible}}
Noncopyable &&cond7 = b ? Derived() : Noncopyable(); // expected-error {{incompatible}}
// Could convert both to a const lvalue of type Noncopyable here, but we're
// not permitted to consider that, either.
const Noncopyable cnc;
const Noncopyable &cond8 = b ? cnc : Derived(); // expected-error {{incompatible}}
const Noncopyable &cond9 = b ? Derived() : cnc; // expected-error {{incompatible}}
extern const volatile Noncopyable make_cv();
Noncopyable cv_difference1 = make_cv();
const volatile Noncopyable cv_difference2 = make();
}
template<typename T> struct ConversionFunction { operator T(); };
Noncopyable cf1 = ConversionFunction<Noncopyable>();
Noncopyable cf2 = ConversionFunction<Noncopyable&&>(); // expected-error {{deleted}}
Noncopyable cf3 = ConversionFunction<const volatile Noncopyable>();
const volatile Noncopyable cf4 = ConversionFunction<Noncopyable>();
Noncopyable cf5 = ConversionFunction<Derived>(); // expected-error {{deleted}}
struct AsMember {
Noncopyable member;
AsMember() : member(make()) {}
};
// FIXME: DR (no number yet): we still get a copy for base or delegating construction.
struct AsBase : Noncopyable {
AsBase() : Noncopyable(make()) {} // expected-error {{deleted}}
};
struct AsDelegating final {
AsDelegating(const AsDelegating &) = delete; // expected-note {{deleted}}
static AsDelegating make(int);
// The base constructor version of this is problematic; the complete object
// version would be OK. Perhaps we could allow copy omission here for final
// classes?
AsDelegating(int n) : AsDelegating(make(n)) {} // expected-error {{deleted}}
};
namespace CtorTemplateBeatsNonTemplateConversionFn {
struct Foo { template <typename Derived> Foo(const Derived &); };
template <typename Derived> struct Base { operator Foo() const = delete; }; // expected-note {{deleted}}
struct Derived : Base<Derived> {};
Foo f(Derived d) { return d; } // expected-error {{invokes a deleted function}}
Foo g(Derived d) { return Foo(d); } // ok, calls constructor
}
|
