1 // RUN: %clang_cc1 -fsyntax-only -verify %s
2 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s
3 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
4
5 struct X0 { // expected-note {{candidate constructor (the implicit copy constructor) not viable}}
6 #if __cplusplus >= 201103L // C++11 or later
7 // expected-note@-2 {{candidate constructor (the implicit move constructor) not viable}}
8 #endif
9 X0(int); // expected-note{{candidate}}
10 template<typename T> X0(T); // expected-note {{candidate}}
11 template<typename T, typename U> X0(T*, U*); // expected-note {{candidate}}
12
13 // PR4761
X0X014 template<typename T> X0() : f0(T::foo) {} // expected-note {{candidate}}
15 int f0;
16 };
17
18 void accept_X0(X0);
19
test_X0(int i,float f)20 void test_X0(int i, float f) {
21 X0 x0a(i);
22 X0 x0b(f);
23 X0 x0c = i;
24 X0 x0d = f;
25 accept_X0(i);
26 accept_X0(&i);
27 accept_X0(f);
28 accept_X0(&f);
29 X0 x0e(&i, &f);
30 X0 x0f(&f, &i);
31
32 X0 x0g(f, &i); // expected-error{{no matching constructor}}
33 }
34
35 template<typename T>
36 struct X1 {
37 X1(const X1&);
38 template<typename U> X1(const X1<U>&);
39 };
40
41 template<typename T>
42 struct Outer {
43 typedef X1<T> A;
44
45 A alloc;
46
OuterOuter47 explicit Outer(const A& a) : alloc(a) { }
48 };
49
test_X1(X1<int> xi)50 void test_X1(X1<int> xi) {
51 Outer<int> oi(xi);
52 Outer<float> of(xi);
53 }
54
55 // PR4655
56 template<class C> struct A {};
57 template <> struct A<int>{A(const A<int>&);};
BB58 struct B { A<int> x; B(B& a) : x(a.x) {} };
59
60 struct X2 {
61 X2(); // expected-note{{candidate constructor}}
62 X2(X2&); // expected-note {{candidate constructor}}
63 template<typename T> X2(T); // expected-note {{candidate template ignored: instantiation would take its own class type by value}}
64 };
65
test(bool Cond,X2 x2)66 X2 test(bool Cond, X2 x2) {
67 if (Cond)
68 return x2; // okay, uses copy constructor
69
70 return X2(); // expected-error{{no matching constructor}}
71 }
72
73 struct X3 {
74 template<typename T> X3(T);
75 };
76
77 template<> X3::X3(X3); // expected-error{{must pass its first argument by reference}}
78
79 struct X4 {
80 X4();
81 ~X4();
82 X4(X4&);
83 template<typename T> X4(const T&, int = 17);
84 };
85
test_X4(bool Cond,X4 x4)86 X4 test_X4(bool Cond, X4 x4) {
87 X4 a(x4, 17); // okay, constructor template
88 X4 b(x4); // okay, copy constructor
89 return X4();
90 }
91
92 // Instantiation of a non-dependent use of a constructor
93 struct DefaultCtorHasDefaultArg {
94 explicit DefaultCtorHasDefaultArg(int i = 17);
95 };
96
97 template<typename T>
default_ctor_inst()98 void default_ctor_inst() {
99 DefaultCtorHasDefaultArg def;
100 }
101
102 template void default_ctor_inst<int>();
103
104 template<typename T>
105 struct X5 {
106 X5();
107 X5(const T &);
108 };
109
110 struct X6 {
111 template<typename T> X6(T);
112 };
113
test_X5_X6()114 void test_X5_X6() {
115 X5<X6> tf;
116 X5<X6> tf2(tf);
117 }
118
119 namespace PR8182 {
120 struct foo {
121 foo();
122 template<class T> foo(T&);
123
124 private:
125 foo(const foo&);
126 };
127
test_foo()128 void test_foo() {
129 foo f1;
130 foo f2(f1);
131 foo f3 = f1;
132 }
133
134 }
135
136 // Don't blow out the stack trying to call an illegal constructor
137 // instantiation. We intentionally allow implicit instantiations to
138 // exist, so make sure they're unusable.
139 //
140 // rdar://19199836
141 namespace self_by_value {
142 template <class T, class U> struct A {
Aself_by_value::A143 A() {}
Aself_by_value::A144 A(const A<T,U> &o) {}
Aself_by_value::A145 A(A<T,T> o) {}
146 };
147
148 void helper(A<int,float>);
149
test1(A<int,int> a)150 void test1(A<int,int> a) {
151 helper(a);
152 }
test2()153 void test2() {
154 helper(A<int,int>());
155 }
156 }
157
158 namespace self_by_value_2 {
159 template <class T, class U> struct A {
Aself_by_value_2::A160 A() {} // expected-note {{not viable: requires 0 arguments}}
Aself_by_value_2::A161 A(A<T,U> &o) {} // expected-note {{not viable: expects an lvalue}}
Aself_by_value_2::A162 A(A<T,T> o) {} // expected-note {{ignored: instantiation takes its own class type by value}}
163 };
164
165 void helper_A(A<int,int>); // expected-note {{passing argument to parameter here}}
test_A()166 void test_A() {
167 helper_A(A<int,int>()); // expected-error {{no matching constructor}}
168 }
169 }
170
171 namespace self_by_value_3 {
172 template <class T, class U> struct A {
Aself_by_value_3::A173 A() {}
Aself_by_value_3::A174 A(A<T,U> &o) {}
Aself_by_value_3::A175 A(A<T,T> o) {}
176 };
177
178 void helper_A(A<int,int>);
test_A(A<int,int> b)179 void test_A(A<int,int> b) {
180 helper_A(b);
181 }
182 }
183