resolve-single-template-id.cpp
5.72 KB
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
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
namespace std {
class type_info {};
}
void one() { }
void two() { } // expected-note 4{{possible target for call}}
void two(int) { } // expected-note 4{{possible target for call}}
template<class T> void twoT() { } // expected-note 5{{possible target for call}}
template<class T> void twoT(int) { } // expected-note 5{{possible target for call}}
template<class T> void oneT() { }
template<class T, class U> void oneT(U) { }
/*
The target can be
an object or reference being initialized (8.5, 8.5.3),
the left side of an assignment (5.17),
a parameter of a function (5.2.2),
a parameter of a user-defined operator (13.5),
the return value of a function, operator function, or conversion (6.6.3),
an explicit type conversion (5.2.3, 5.2.9, 5.4), or
a non-type template-parameter (14.3.2)
*/
//#include <typeinfo>
template<void (*p)(int)> struct test { };
int main()
{
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?}}
typeid(oneT<int>); // expected-warning{{expression result unused}}
sizeof(oneT<int>); // expected-error {{invalid application of 'sizeof' to a function type}}
sizeof(twoT<int>); //expected-error {{reference to overloaded function could not be resolved; did you mean to call it?}}
decltype(oneT<int>)* fun = 0;
*one; // expected-warning {{expression result unused}}
*oneT<int>; // 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?}} expected-error {{indirection requires pointer operand}}
*twoT<int>; //expected-error {{reference to overloaded function could not be resolved; did you mean to call it?}}
!oneT<int>; // expected-warning {{expression result unused}} expected-warning {{address of function 'oneT<int>' will always evaluate to 'true'}} expected-note {{prefix with the address-of operator to silence this warning}}
+oneT<int>; // expected-warning {{expression result unused}}
-oneT<int>; //expected-error {{invalid argument type}}
oneT<int> == 0; // expected-warning {{equality comparison result unused}} \
// expected-note {{use '=' to turn this equality comparison into an assignment}} \
// expected-warning {{comparison of function 'oneT<int>' equal to a null pointer is always false}} \
// expected-note {{prefix with the address-of operator to silence this warning}}
0 == oneT<int>; // expected-warning {{equality comparison result unused}} \
// expected-warning {{comparison of function 'oneT<int>' equal to a null pointer is always false}} \
// expected-note {{prefix with the address-of operator to silence this warning}}
0 != oneT<int>; // expected-warning {{inequality comparison result unused}} \
// expected-warning {{comparison of function 'oneT<int>' not equal to a null pointer is always true}} \
// expected-note {{prefix with the address-of operator to silence this warning}}
(false ? one : oneT<int>); // expected-warning {{expression result unused}}
void (*p1)(int); p1 = oneT<int>;
int i = (int) (false ? (void (*)(int))twoT<int> : oneT<int>); //expected-error {{incompatible operand}}
(twoT<int>) == oneT<int>; //expected-error {{reference to overloaded function could not be resolved; did you mean to call it?}} {{cannot resolve overloaded function 'twoT' from context}}
bool b = oneT<int>; // expected-warning {{address of function 'oneT<int>' will always evaluate to 'true'}} expected-note {{prefix with the address-of operator to silence this warning}}
void (*p)() = oneT<int>;
test<oneT<int> > ti;
void (*u)(int) = oneT<int>;
b = (void (*)()) twoT<int>;
one < one; //expected-warning {{self-comparison always evaluates to false}} \
//expected-warning {{relational comparison result unused}}
oneT<int> < oneT<int>; //expected-warning {{self-comparison always evaluates to false}} \
//expected-warning {{relational comparison result unused}}
two < two; //expected-error 2 {{reference to overloaded function could not be resolved; did you mean to call it with no arguments?}} expected-error {{invalid operands to binary expression ('void' and 'void')}}
twoT<int> < twoT<int>; //expected-error {{reference to overloaded function could not be resolved; did you mean to call it?}} {{cannot resolve overloaded function 'twoT' from context}}
oneT<int> == 0; // expected-warning {{equality comparison result unused}} \
// expected-note {{use '=' to turn this equality comparison into an assignment}} \
// expected-warning {{comparison of function 'oneT<int>' equal to a null pointer is always false}} \
// expected-note {{prefix with the address-of operator to silence this warning}}
}
struct rdar9108698 {
template<typename> void f(); // expected-note{{possible target for call}}
};
void test_rdar9108698(rdar9108698 x) {
x.f<int>; // expected-error{{reference to non-static member function must be called}}
}
namespace GCC_PR67898 {
void f(int);
void f(float);
template<typename T, T F, T G, bool b = F == G> struct X {
static_assert(b, "");
};
template<typename T> void test1() { X<void(T), f, f>(); }
template<typename T> void test2() { X<void(*)(T), f, f>(); }
template void test1<int>();
template void test2<int>();
}