blob: e0217112d91b519d1234eb07798be270c541656d (
about) (
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
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
// RUN: %clang_cc1 -fsyntax-only -verify -Wno-bool-conversion %s
typedef __typeof__(((int*)0)-((int*)0)) ptrdiff_t;
namespace DontResolveTooEarly_WaitForOverloadResolution
{
template <class T> T* f(int); // #1
template <class T, class U> T& f(U); // #2
void g() {
int *ip = f<int>(1); // calls #1
}
template <class T>
T* f2(int);
template <class T, class U>
T& f2(U);
void g2() {
int*ip = (f2<int>)(1); // ok
}
} // End namespace
namespace DontAllowUnresolvedOverloadedExpressionInAnUnusedExpression
{
void one() { }
template<class T> void oneT() { }
void two() { } // expected-note 2 {{possible target for call}}
void two(int) { } // expected-note 2 {{possible target for call}}
template<class T> void twoT() { } // expected-note 2 {{possible target for call}}
template<class T> void twoT(T) { } // expected-note 2 {{possible target for call}}
void check()
{
one; // expected-warning {{expression result unused}}
two; // expected-error{{reference to overloaded function could not be resolved; did you mean to call it with no arguments?}}
oneT<int>; // expected-warning {{expression result unused}}
twoT<int>; // expected-error {{reference to overloaded function could not be resolved; did you mean to call it?}}
}
// check the template function case
template<class T> void check()
{
one; // expected-warning {{expression result unused}}
two; // expected-error{{reference to overloaded function could not be resolved; did you mean to call it with no arguments?}}
oneT<int>; // expected-warning {{expression result unused}}
twoT<int>; // expected-error {{reference to overloaded function could not be resolved; did you mean to call it?}}
}
}
template<typename T>
void twoT() { }
template<typename T, typename U>
void twoT(T) { }
void two() { }; //expected-note 5{{candidate}}
void two(int) { }; //expected-note 5{{candidate}}
void one() { }
template<class T>
void oneT() { }
template<class T>
void cant_resolve() { } //expected-note 3{{candidate}}
template<class T> void cant_resolve(T) { }//expected-note 3{{candidate}}
int main()
{
{ static_cast<void>(one); }
{ (void)(one); }
{ static_cast<void>(oneT<int>); }
{ (void)(oneT<int>); }
{ static_cast<void>(two); } // expected-error {{address of overloaded function 'two' cannot be static_cast to type 'void'}}
{ (void)(two); } // expected-error {{address of overloaded function 'two' cannot be cast to type 'void'}}
{ static_cast<void>(twoT<int>); }
{ (void)(twoT<int>); }
{ ptrdiff_t x = reinterpret_cast<ptrdiff_t>(oneT<int>); }
{ (void) reinterpret_cast<int (*)(char, double)>(oneT<int>); }
{ (void) reinterpret_cast<ptrdiff_t>(one); }
{ (void) reinterpret_cast<int (*)(char, double)>(one); }
{ ptrdiff_t x = reinterpret_cast<ptrdiff_t>(twoT<int>); }
{ (void) reinterpret_cast<int (*)(char, double)>(twoT<int>); }
{ (void) reinterpret_cast<void (*)(int)>(two); } //expected-error {{reinterpret_cast}}
{ (void) static_cast<void (*)(int)>(two); } //ok
{ (void) reinterpret_cast<int>(two); } //expected-error {{reinterpret_cast}}
{ (void) reinterpret_cast<int (*)(char, double)>(two); } //expected-error {{reinterpret_cast}}
{ bool b = (twoT<int>); }
{ bool b = (twoT<int, int>); }
{ bool b = &twoT<int>; //&foo<int>; }
b = &(twoT<int>); }
{ ptrdiff_t x = (ptrdiff_t) &twoT<int>;
x = (ptrdiff_t) &twoT<int>; }
{ ptrdiff_t x = (ptrdiff_t) twoT<int>;
x = (ptrdiff_t) twoT<int>; }
{ ptrdiff_t x = (ptrdiff_t) &twoT<int,int>;
x = (ptrdiff_t) &twoT<int>; }
{ oneT<int>; &oneT<int>; } //expected-warning 2{{expression result unused}}
{ static_cast<void>(cant_resolve<int>); } // expected-error {{address of overload}}
{ bool b = cant_resolve<int>; } // expected-error {{address of overload}}
{ (void) cant_resolve<int>; } // expected-error {{address of overload}}
}
namespace member_pointers {
struct S {
template <typename T> bool f(T) { return false; }
template <typename T> static bool g(T) { return false; }
template <typename T> bool h(T) { return false; } // expected-note 3 {{possible target for call}}
template <int N> static bool h(int) { return false; } // expected-note 3 {{possible target for call}}
};
void test(S s) {
if (S::f<char>) return; // expected-error {{call to non-static member function without an object argument}}
if (S::f<int>) return; // expected-error {{call to non-static member function without an object argument}}
if (&S::f<char>) return;
if (&S::f<int>) return;
if (s.f<char>) return; // expected-error {{reference to non-static member function must be called}}
if (s.f<int>) return; // expected-error {{reference to non-static member function must be called}}
if (&s.f<char>) return; // expected-error {{cannot create a non-constant pointer to member function}}
if (&s.f<int>) return; // expected-error {{cannot create a non-constant pointer to member function}}
if (S::g<char>) return;
if (S::g<int>) return;
if (&S::g<char>) return;
if (&S::g<int>) return;
if (s.g<char>) return;
if (s.g<int>) return;
if (&s.g<char>) return;
if (&s.g<int>) return;
if (S::h<42>) return;
if (S::h<int>) return; // expected-error {{reference to overloaded function could not be resolved; did you mean to call it?}}
if (&S::h<42>) return;
if (&S::h<int>) return;
if (s.h<42>) return;
if (s.h<int>) return; // expected-error {{reference to overloaded function could not be resolved; did you mean to call it?}}
if (&s.h<42>) return;
if (&s.h<int>) return; // expected-error {{reference to overloaded function could not be resolved; did you mean to call it?}}
{ bool b = S::f<char>; } // expected-error {{call to non-static member function without an object argument}}
{ bool b = S::f<int>; } // expected-error {{call to non-static member function without an object argument}}
{ bool b = &S::f<char>; }
{ bool b = &S::f<int>; }
// These next two errors are terrible.
{ bool b = s.f<char>; } // expected-error {{reference to non-static member function must be called}}
{ bool b = s.f<int>; } // expected-error {{reference to non-static member function must be called}}
{ bool b = &s.f<char>; } // expected-error {{cannot create a non-constant pointer to member function}}
{ bool b = &s.f<int>; } // expected-error {{cannot create a non-constant pointer to member function}}
{ bool b = S::g<char>; }
{ bool b = S::g<int>; }
{ bool b = &S::g<char>; }
{ bool b = &S::g<int>; }
{ bool b = s.g<char>; }
{ bool b = s.g<int>; }
{ bool b = &s.g<char>; }
{ bool b = &s.g<int>; }
{ bool b = S::h<42>; }
{ bool b = S::h<int>; } // expected-error {{can't form member pointer of type 'bool' without '&' and class name}}
{ bool b = &S::h<42>; }
{ bool b = &S::h<int>; }
{ bool b = s.h<42>; }
{ bool b = s.h<int>; } // expected-error {{can't form member pointer of type 'bool' without '&' and class name}}
{ bool b = &s.h<42>; }
{ bool b = &s.h<int>; } // expected-error {{can't form member pointer of type 'bool' without '&' and class name}}
}
}
|
