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