| 1 | // RUN: %clang_cc1 -fsyntax-only -verify -Wbind-to-temporary-copy %s |
| 2 | // RUN: %clang_cc1 -fsyntax-only -verify -Wbind-to-temporary-copy -std=c++98 %s |
| 3 | // RUN: %clang_cc1 -fsyntax-only -verify -Wbind-to-temporary-copy -std=c++11 %s |
| 4 | |
| 5 | // Make sure we don't produce invalid IR. |
| 6 | // RUN: %clang_cc1 -emit-llvm-only %s |
| 7 | // RUN: %clang_cc1 -emit-llvm-only -std=c++98 %s |
| 8 | // RUN: %clang_cc1 -emit-llvm-only -std=c++11 %s |
| 9 | |
| 10 | namespace test1 { |
| 11 | static void foo(); // expected-warning {{function 'test1::foo' has internal linkage but is not defined}} |
| 12 | template <class T> static void bar(); // expected-warning {{function 'test1::bar<int>' has internal linkage but is not defined}} |
| 13 | |
| 14 | void test() { |
| 15 | foo(); // expected-note {{used here}} |
| 16 | bar<int>(); // expected-note {{used here}} |
| 17 | } |
| 18 | } |
| 19 | |
| 20 | namespace test2 { |
| 21 | namespace { |
| 22 | void foo(); // expected-warning {{function 'test2::(anonymous namespace)::foo' has internal linkage but is not defined}} |
| 23 | extern int var; // expected-warning {{variable 'test2::(anonymous namespace)::var' has internal linkage but is not defined}} |
| 24 | template <class T> void bar(); // expected-warning {{function 'test2::(anonymous namespace)::bar<int>' has internal linkage but is not defined}} |
| 25 | } |
| 26 | void test() { |
| 27 | foo(); // expected-note {{used here}} |
| 28 | var = 0; // expected-note {{used here}} |
| 29 | bar<int>(); // expected-note {{used here}} |
| 30 | } |
| 31 | } |
| 32 | |
| 33 | namespace test3 { |
| 34 | namespace { |
| 35 | void foo(); |
| 36 | extern int var; |
| 37 | template <class T> void bar(); |
| 38 | } |
| 39 | |
| 40 | void test() { |
| 41 | foo(); |
| 42 | var = 0; |
| 43 | bar<int>(); |
| 44 | } |
| 45 | |
| 46 | namespace { |
| 47 | void foo() {} |
| 48 | int var = 0; |
| 49 | template <class T> void bar() {} |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | namespace test4 { |
| 54 | namespace { |
| 55 | struct A { |
| 56 | A(); // expected-warning {{function 'test4::(anonymous namespace)::A::A' has internal linkage but is not defined}} |
| 57 | ~A();// expected-warning {{function 'test4::(anonymous namespace)::A::~A' has internal linkage but is not defined}} |
| 58 | virtual void foo(); // expected-warning {{function 'test4::(anonymous namespace)::A::foo' has internal linkage but is not defined}} |
| 59 | virtual void bar() = 0; |
| 60 | virtual void baz(); // expected-warning {{function 'test4::(anonymous namespace)::A::baz' has internal linkage but is not defined}} |
| 61 | }; |
| 62 | } |
| 63 | |
| 64 | void test(A &a) { |
| 65 | a.foo(); // expected-note {{used here}} |
| 66 | a.bar(); |
| 67 | a.baz(); // expected-note {{used here}} |
| 68 | } |
| 69 | |
| 70 | struct Test : A { |
| 71 | Test() {} // expected-note 2 {{used here}} |
| 72 | }; |
| 73 | } |
| 74 | |
| 75 | // rdar://problem/9014651 |
| 76 | namespace test5 { |
| 77 | namespace { |
| 78 | struct A {}; |
| 79 | } |
| 80 | |
| 81 | template <class N> struct B { |
| 82 | static int var; // expected-warning {{variable 'test5::B<test5::(anonymous namespace)::A>::var' has internal linkage but is not defined}} |
| 83 | static void foo(); // expected-warning {{function 'test5::B<test5::(anonymous namespace)::A>::foo' has internal linkage but is not defined}} |
| 84 | }; |
| 85 | extern template int B<A>::var; |
| 86 | |
| 87 | void test() { |
| 88 | B<A>::var = 0; // expected-note {{used here}} |
| 89 | B<A>::foo(); // expected-note {{used here}} |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | namespace test6 { |
| 94 | template <class T> struct A { |
| 95 | static const int zero = 0; |
| 96 | static const int one = 1; |
| 97 | static const int two = 2; |
| 98 | |
| 99 | int value; |
| 100 | |
| 101 | A() : value(zero) { |
| 102 | value = one; |
| 103 | } |
| 104 | }; |
| 105 | |
| 106 | namespace { struct Internal; } |
| 107 | |
| 108 | void test() { |
| 109 | A<Internal> a; |
| 110 | a.value = A<Internal>::two; |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | // We support (as an extension) private, undefined copy constructors when |
| 115 | // a temporary is bound to a reference even in C++98. Similarly, we shouldn't |
| 116 | // warn about this copy constructor being used without a definition. |
| 117 | namespace PR9323 { |
| 118 | namespace { |
| 119 | struct Uncopyable { |
| 120 | Uncopyable() {} |
| 121 | private: |
| 122 | Uncopyable(const Uncopyable&); // expected-note {{declared private here}} |
| 123 | }; |
| 124 | } |
| 125 | void f(const Uncopyable&) {} |
| 126 | void test() { |
| 127 | f(Uncopyable()); |
| 128 | #if __cplusplus <= 199711L // C++03 or earlier modes |
| 129 | // expected-warning@-2 {{C++98 requires an accessible copy constructor}} |
| 130 | #else |
| 131 | // expected-warning@-4 {{copying parameter of type 'PR9323::(anonymous namespace)::Uncopyable' when binding a reference to a temporary would invoke an inaccessible constructor in C++98}} |
| 132 | #endif |
| 133 | }; |
| 134 | } |
| 135 | |
| 136 | |
| 137 | namespace std { class type_info; }; |
| 138 | namespace cxx11_odr_rules { |
| 139 | // Note: the way this test is written isn't really ideal, but there really |
| 140 | // isn't any other way to check that the odr-used logic for constants |
| 141 | // is working without working implicit capture in lambda-expressions. |
| 142 | // (The more accurate used-but-not-defined warning is the only other visible |
| 143 | // effect of accurate odr-used computation.) |
| 144 | // |
| 145 | // Note that the warning in question can trigger in cases some people would |
| 146 | // consider false positives; hopefully that happens rarely in practice. |
| 147 | // |
| 148 | // FIXME: Suppressing this test while I figure out how to fix a bug in the |
| 149 | // odr-use marking code. |
| 150 | |
| 151 | namespace { |
| 152 | struct A { |
| 153 | static const int unused = 10; |
| 154 | static const int used1 = 20; // xpected-warning {{internal linkage}} |
| 155 | static const int used2 = 20; // xpected-warning {{internal linkage}} |
| 156 | virtual ~A() {} |
| 157 | }; |
| 158 | } |
| 159 | |
| 160 | void a(int,int); |
| 161 | A& p(const int&) { static A a; return a; } |
| 162 | |
| 163 | // Check handling of default arguments |
| 164 | void b(int = A::unused); |
| 165 | |
| 166 | void tests() { |
| 167 | // Basic test |
| 168 | a(A::unused, A::unused); |
| 169 | |
| 170 | // Check that nesting an unevaluated or constant-evaluated context does |
| 171 | // the right thing. |
| 172 | a(A::unused, sizeof(int[10])); |
| 173 | |
| 174 | // Check that the checks work with unevaluated contexts |
| 175 | (void)sizeof(p(A::used1)); |
| 176 | (void)typeid(p(A::used1)); // expected-warning {{expression with side effects will be evaluated despite being used as an operand to 'typeid'}} xpected-note {{used here}} |
| 177 | |
| 178 | // Misc other testing |
| 179 | a(A::unused, 1 ? A::used2 : A::used2); // xpected-note {{used here}} |
| 180 | b(); |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | |
| 185 | namespace OverloadUse { |
| 186 | namespace { |
| 187 | void f(); |
| 188 | void f(int); // expected-warning {{function 'OverloadUse::(anonymous namespace)::f' has internal linkage but is not defined}} |
| 189 | void f(int, int); // expected-warning {{function 'OverloadUse::(anonymous namespace)::f' has internal linkage but is not defined}} |
| 190 | #if __cplusplus < 201103L |
| 191 | // expected-note@-3 {{here}} |
| 192 | // expected-note@-3 {{here}} |
| 193 | #endif |
| 194 | } |
| 195 | template<void x()> void t() { x(); } |
| 196 | template<void x(int)> void t(int*) { x(10); } |
| 197 | template<void x(int, int)> void t(int*, int*) {} |
| 198 | void g(int n) { |
| 199 | t<f>(&n); // expected-note {{used here}} |
| 200 | t<f>(&n, &n); // expected-note {{used here}} |
| 201 | #if __cplusplus < 201103L |
| 202 | // expected-warning@-3 {{non-type template argument referring to function 'f' with internal linkage}} |
| 203 | // expected-warning@-3 {{non-type template argument referring to function 'f' with internal linkage}} |
| 204 | #endif |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | namespace test7 { |
| 209 | typedef struct { |
| 210 | void bar(); |
| 211 | void foo() { |
| 212 | bar(); |
| 213 | } |
| 214 | } A; |
| 215 | } |
| 216 | |
| 217 | namespace test8 { |
| 218 | typedef struct { |
| 219 | void bar(); // expected-warning {{function 'test8::(anonymous struct)::bar' has internal linkage but is not defined}} |
| 220 | void foo() { |
| 221 | bar(); // expected-note {{used here}} |
| 222 | } |
| 223 | } *A; |
| 224 | } |
| 225 | |
| 226 | namespace test9 { |
| 227 | namespace { |
| 228 | struct X { |
| 229 | virtual void notused() = 0; |
| 230 | virtual void used() = 0; // expected-warning {{function 'test9::(anonymous namespace)::X::used' has internal linkage but is not defined}} |
| 231 | }; |
| 232 | } |
| 233 | void test(X &x) { |
| 234 | x.notused(); |
| 235 | x.X::used(); // expected-note {{used here}} |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | namespace test10 { |
| 240 | namespace { |
| 241 | struct X { |
| 242 | virtual void notused() = 0; |
| 243 | virtual void used() = 0; // expected-warning {{function 'test10::(anonymous namespace)::X::used' has internal linkage but is not defined}} |
| 244 | |
| 245 | void test() { |
| 246 | notused(); |
| 247 | (void)&X::notused; |
| 248 | (this->*&X::notused)(); |
| 249 | X::used(); // expected-note {{used here}} |
| 250 | } |
| 251 | }; |
| 252 | struct Y : X { |
| 253 | using X::notused; |
| 254 | }; |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | namespace test11 { |
| 259 | namespace { |
| 260 | struct A { |
| 261 | virtual bool operator()() const = 0; |
| 262 | virtual void operator!() const = 0; |
| 263 | virtual bool operator+(const A&) const = 0; |
| 264 | virtual int operator[](int) const = 0; |
| 265 | virtual const A* operator->() const = 0; |
| 266 | int member; |
| 267 | }; |
| 268 | |
| 269 | struct B { |
| 270 | bool operator()() const; // expected-warning {{function 'test11::(anonymous namespace)::B::operator()' has internal linkage but is not defined}} |
| 271 | void operator!() const; // expected-warning {{function 'test11::(anonymous namespace)::B::operator!' has internal linkage but is not defined}} |
| 272 | bool operator+(const B&) const; // expected-warning {{function 'test11::(anonymous namespace)::B::operator+' has internal linkage but is not defined}} |
| 273 | int operator[](int) const; // expected-warning {{function 'test11::(anonymous namespace)::B::operator[]' has internal linkage but is not defined}} |
| 274 | const B* operator->() const; // expected-warning {{function 'test11::(anonymous namespace)::B::operator->' has internal linkage but is not defined}} |
| 275 | int member; |
| 276 | }; |
| 277 | } |
| 278 | |
| 279 | void test1(A &a1, A &a2) { |
| 280 | a1(); |
| 281 | !a1; |
| 282 | a1 + a2; |
| 283 | a1[0]; |
| 284 | (void)a1->member; |
| 285 | } |
| 286 | |
| 287 | void test2(B &b1, B &b2) { |
| 288 | b1(); // expected-note {{used here}} |
| 289 | !b1; // expected-note {{used here}} |
| 290 | b1 + b2; // expected-note {{used here}} |
| 291 | b1[0]; // expected-note {{used here}} |
| 292 | (void)b1->member; // expected-note {{used here}} |
| 293 | } |
| 294 | } |
| 295 | |
| 296 | namespace test12 { |
| 297 | class T1 {}; class T2 {}; class T3 {}; class T4 {}; class T5 {}; class T6 {}; |
| 298 | class T7 {}; |
| 299 | |
| 300 | namespace { |
| 301 | struct Cls { |
| 302 | virtual void f(int) = 0; |
| 303 | virtual void f(int, double) = 0; |
| 304 | void g(int); // expected-warning {{function 'test12::(anonymous namespace)::Cls::g' has internal linkage but is not defined}} |
| 305 | void g(int, double); |
| 306 | virtual operator T1() = 0; |
| 307 | virtual operator T2() = 0; |
| 308 | virtual operator T3&() = 0; |
| 309 | operator T4(); // expected-warning {{function 'test12::(anonymous namespace)::Cls::operator T4' has internal linkage but is not defined}} |
| 310 | operator T5(); // expected-warning {{function 'test12::(anonymous namespace)::Cls::operator T5' has internal linkage but is not defined}} |
| 311 | operator T6&(); // expected-warning {{function 'test12::(anonymous namespace)::Cls::operator test12::T6 &' has internal linkage but is not defined}} |
| 312 | }; |
| 313 | |
| 314 | struct Cls2 { |
| 315 | Cls2(T7); // expected-warning {{function 'test12::(anonymous namespace)::Cls2::Cls2' has internal linkage but is not defined}} |
| 316 | }; |
| 317 | } |
| 318 | |
| 319 | void test(Cls &c) { |
| 320 | c.f(7); |
| 321 | c.g(7); // expected-note {{used here}} |
| 322 | (void)static_cast<T1>(c); |
| 323 | T2 t2 = c; |
| 324 | T3 &t3 = c; |
| 325 | (void)static_cast<T4>(c); // expected-note {{used here}} |
| 326 | T5 t5 = c; // expected-note {{used here}} |
| 327 | T6 &t6 = c; // expected-note {{used here}} |
| 328 | |
| 329 | Cls2 obj1((T7())); // expected-note {{used here}} |
| 330 | } |
| 331 | } |
| 332 | |
| 333 | namespace test13 { |
| 334 | namespace { |
| 335 | struct X { |
| 336 | virtual void f() { } |
| 337 | }; |
| 338 | |
| 339 | struct Y : public X { |
| 340 | virtual void f() = 0; |
| 341 | |
| 342 | virtual void g() { |
| 343 | X::f(); |
| 344 | } |
| 345 | }; |
| 346 | } |
| 347 | } |
| 348 | |
| 349 | namespace test14 { |
| 350 | extern "C" const int foo; |
| 351 | |
| 352 | int f() { |
| 353 | return foo; |
| 354 | } |
| 355 | } |
| 356 | |