| 1 | // RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s |
| 2 | // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s |
| 3 | // RUN: %clang_cc1 -fsyntax-only -verify %s |
| 4 | |
| 5 | // C++03 [namespace.udecl]p12: |
| 6 | // When a using-declaration brings names from a base class into a |
| 7 | // derived class scope, member functions in the derived class |
| 8 | // override and/or hide member functions with the same name and |
| 9 | // parameter types in a base class (rather than conflicting). |
| 10 | |
| 11 | template <unsigned n> struct Opaque {}; |
| 12 | template <unsigned n> void expect(Opaque<n> _) {} |
| 13 | |
| 14 | // PR5727 |
| 15 | // This just shouldn't crash. |
| 16 | namespace test0 { |
| 17 | template<typename> struct RefPtr { }; |
| 18 | template<typename> struct PtrHash { |
| 19 | static void f() { } |
| 20 | }; |
| 21 | template<typename T> struct PtrHash<RefPtr<T> > : PtrHash<T*> { |
| 22 | using PtrHash<T*>::f; |
| 23 | static void f() { f(); } |
| 24 | }; |
| 25 | } |
| 26 | |
| 27 | // Simple hiding. |
| 28 | namespace test1 { |
| 29 | struct Base { |
| 30 | Opaque<0> foo(Opaque<0>); |
| 31 | Opaque<0> foo(Opaque<1>); |
| 32 | Opaque<0> foo(Opaque<2>); |
| 33 | }; |
| 34 | |
| 35 | // using before decls |
| 36 | struct Test0 : Base { |
| 37 | using Base::foo; |
| 38 | Opaque<1> foo(Opaque<1>); |
| 39 | Opaque<1> foo(Opaque<3>); |
| 40 | |
| 41 | void test0() { Opaque<0> _ = foo(Opaque<0>()); } |
| 42 | void test1() { Opaque<1> _ = foo(Opaque<1>()); } |
| 43 | void test2() { Opaque<0> _ = foo(Opaque<2>()); } |
| 44 | void test3() { Opaque<1> _ = foo(Opaque<3>()); } |
| 45 | }; |
| 46 | |
| 47 | // using after decls |
| 48 | struct Test1 : Base { |
| 49 | Opaque<1> foo(Opaque<1>); |
| 50 | Opaque<1> foo(Opaque<3>); |
| 51 | using Base::foo; |
| 52 | |
| 53 | void test0() { Opaque<0> _ = foo(Opaque<0>()); } |
| 54 | void test1() { Opaque<1> _ = foo(Opaque<1>()); } |
| 55 | void test2() { Opaque<0> _ = foo(Opaque<2>()); } |
| 56 | void test3() { Opaque<1> _ = foo(Opaque<3>()); } |
| 57 | }; |
| 58 | |
| 59 | // using between decls |
| 60 | struct Test2 : Base { |
| 61 | Opaque<1> foo(Opaque<0>); |
| 62 | using Base::foo; |
| 63 | Opaque<1> foo(Opaque<2>); |
| 64 | Opaque<1> foo(Opaque<3>); |
| 65 | |
| 66 | void test0() { Opaque<1> _ = foo(Opaque<0>()); } |
| 67 | void test1() { Opaque<0> _ = foo(Opaque<1>()); } |
| 68 | void test2() { Opaque<1> _ = foo(Opaque<2>()); } |
| 69 | void test3() { Opaque<1> _ = foo(Opaque<3>()); } |
| 70 | }; |
| 71 | } |
| 72 | |
| 73 | // Crazy dependent hiding. |
| 74 | namespace test2 { |
| 75 | struct Base { |
| 76 | void foo(int); |
| 77 | }; |
| 78 | |
| 79 | template <typename T> struct Derived1 : Base { |
| 80 | using Base::foo; |
| 81 | void foo(T); |
| 82 | |
| 83 | void testUnresolved(int i) { foo(i); } |
| 84 | }; |
| 85 | |
| 86 | void test0(int i) { |
| 87 | Derived1<int> d1; |
| 88 | d1.foo(i); |
| 89 | d1.testUnresolved(i); |
| 90 | } |
| 91 | |
| 92 | // Same thing, except with the order of members reversed. |
| 93 | template <typename T> struct Derived2 : Base { |
| 94 | void foo(T); |
| 95 | using Base::foo; |
| 96 | |
| 97 | void testUnresolved(int i) { foo(i); } |
| 98 | }; |
| 99 | |
| 100 | void test1(int i) { |
| 101 | Derived2<int> d2; |
| 102 | d2.foo(i); |
| 103 | d2.testUnresolved(i); |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | // Hiding of member templates. |
| 108 | namespace test3 { |
| 109 | struct Base { |
| 110 | template <class T> Opaque<0> foo() { return Opaque<0>(); } |
| 111 | template <int n> Opaque<1> foo() { return Opaque<1>(); } |
| 112 | }; |
| 113 | |
| 114 | struct Derived1 : Base { |
| 115 | using Base::foo; |
| 116 | template <int n> Opaque<2> foo() { return Opaque<2>(); } // expected-note {{invalid explicitly-specified argument for template parameter 'n'}} |
| 117 | }; |
| 118 | |
| 119 | struct Derived2 : Base { |
| 120 | template <int n> Opaque<2> foo() { return Opaque<2>(); } // expected-note {{invalid explicitly-specified argument for template parameter 'n'}} |
| 121 | using Base::foo; |
| 122 | }; |
| 123 | |
| 124 | struct Derived3 : Base { |
| 125 | using Base::foo; |
| 126 | template <class T> Opaque<3> foo() { return Opaque<3>(); } // expected-note {{invalid explicitly-specified argument for template parameter 'T'}} |
| 127 | }; |
| 128 | |
| 129 | struct Derived4 : Base { |
| 130 | template <class T> Opaque<3> foo() { return Opaque<3>(); } // expected-note {{invalid explicitly-specified argument for template parameter 'T'}} |
| 131 | using Base::foo; |
| 132 | }; |
| 133 | |
| 134 | void test() { |
| 135 | expect<0>(Base().foo<int>()); |
| 136 | expect<1>(Base().foo<0>()); |
| 137 | expect<0>(Derived1().foo<int>()); // expected-error {{no matching member function for call to 'foo'}} |
| 138 | expect<2>(Derived1().foo<0>()); |
| 139 | expect<0>(Derived2().foo<int>()); // expected-error {{no matching member function for call to 'foo'}} |
| 140 | expect<2>(Derived2().foo<0>()); |
| 141 | expect<3>(Derived3().foo<int>()); |
| 142 | expect<1>(Derived3().foo<0>()); // expected-error {{no matching member function for call to 'foo'}} |
| 143 | expect<3>(Derived4().foo<int>()); |
| 144 | expect<1>(Derived4().foo<0>()); // expected-error {{no matching member function for call to 'foo'}} |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | // PR7384: access control for member templates. |
| 149 | namespace test4 { |
| 150 | class Base { |
| 151 | protected: |
| 152 | template<typename T> void foo(T); |
| 153 | template<typename T> void bar(T); // expected-note {{declared protected here}} |
| 154 | }; |
| 155 | |
| 156 | struct Derived : Base { |
| 157 | using Base::foo; |
| 158 | }; |
| 159 | |
| 160 | void test() { |
| 161 | Derived d; |
| 162 | d.foo<int>(3); |
| 163 | d.bar<int>(3); // expected-error {{'bar' is a protected member}} |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | namespace test5 { |
| 168 | struct Derived; |
| 169 | struct Base { |
| 170 | void operator=(const Derived&); |
| 171 | }; |
| 172 | struct Derived : Base { |
| 173 | // Hidden by implicit derived class operator. |
| 174 | using Base::operator=; |
| 175 | }; |
| 176 | void f(Derived d) { |
| 177 | d = d; |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | #if __cplusplus >= 201103L |
| 182 | namespace test6 { |
| 183 | struct Derived; |
| 184 | struct Base { |
| 185 | void operator=(Derived&&); |
| 186 | }; |
| 187 | struct Derived : Base { |
| 188 | // Hidden by implicit derived class operator. |
| 189 | using Base::operator=; |
| 190 | }; |
| 191 | void f(Derived d) { |
| 192 | d = Derived(); |
| 193 | } |
| 194 | } |
| 195 | #endif |
| 196 | |