1*67e74705SXin Li // RUN: %clang_cc1 -fsyntax-only -verify -Wbind-to-temporary-copy %s 2*67e74705SXin Li // RUN: %clang_cc1 -fsyntax-only -verify -Wbind-to-temporary-copy -std=c++98 %s 3*67e74705SXin Li // RUN: %clang_cc1 -fsyntax-only -verify -Wbind-to-temporary-copy -std=c++11 %s 4*67e74705SXin Li 5*67e74705SXin Li // Make sure we don't produce invalid IR. 6*67e74705SXin Li // RUN: %clang_cc1 -emit-llvm-only %s 7*67e74705SXin Li // RUN: %clang_cc1 -emit-llvm-only -std=c++98 %s 8*67e74705SXin Li // RUN: %clang_cc1 -emit-llvm-only -std=c++11 %s 9*67e74705SXin Li 10*67e74705SXin Li namespace test1 { 11*67e74705SXin Li static void foo(); // expected-warning {{function 'test1::foo' has internal linkage but is not defined}} 12*67e74705SXin Li template <class T> static void bar(); // expected-warning {{function 'test1::bar<int>' has internal linkage but is not defined}} 13*67e74705SXin Li test()14*67e74705SXin Li void test() { 15*67e74705SXin Li foo(); // expected-note {{used here}} 16*67e74705SXin Li bar<int>(); // expected-note {{used here}} 17*67e74705SXin Li } 18*67e74705SXin Li } 19*67e74705SXin Li 20*67e74705SXin Li namespace test2 { 21*67e74705SXin Li namespace { 22*67e74705SXin Li void foo(); // expected-warning {{function 'test2::(anonymous namespace)::foo' has internal linkage but is not defined}} 23*67e74705SXin Li extern int var; // expected-warning {{variable 'test2::(anonymous namespace)::var' has internal linkage but is not defined}} 24*67e74705SXin Li template <class T> void bar(); // expected-warning {{function 'test2::(anonymous namespace)::bar<int>' has internal linkage but is not defined}} 25*67e74705SXin Li } test()26*67e74705SXin Li void test() { 27*67e74705SXin Li foo(); // expected-note {{used here}} 28*67e74705SXin Li var = 0; // expected-note {{used here}} 29*67e74705SXin Li bar<int>(); // expected-note {{used here}} 30*67e74705SXin Li } 31*67e74705SXin Li } 32*67e74705SXin Li 33*67e74705SXin Li namespace test3 { 34*67e74705SXin Li namespace { 35*67e74705SXin Li void foo(); 36*67e74705SXin Li extern int var; 37*67e74705SXin Li template <class T> void bar(); 38*67e74705SXin Li } 39*67e74705SXin Li test()40*67e74705SXin Li void test() { 41*67e74705SXin Li foo(); 42*67e74705SXin Li var = 0; 43*67e74705SXin Li bar<int>(); 44*67e74705SXin Li } 45*67e74705SXin Li 46*67e74705SXin Li namespace { foo()47*67e74705SXin Li void foo() {} 48*67e74705SXin Li int var = 0; bar()49*67e74705SXin Li template <class T> void bar() {} 50*67e74705SXin Li } 51*67e74705SXin Li } 52*67e74705SXin Li 53*67e74705SXin Li namespace test4 { 54*67e74705SXin Li namespace { 55*67e74705SXin Li struct A { 56*67e74705SXin Li A(); // expected-warning {{function 'test4::(anonymous namespace)::A::A' has internal linkage but is not defined}} 57*67e74705SXin Li ~A();// expected-warning {{function 'test4::(anonymous namespace)::A::~A' has internal linkage but is not defined}} 58*67e74705SXin Li virtual void foo(); // expected-warning {{function 'test4::(anonymous namespace)::A::foo' has internal linkage but is not defined}} 59*67e74705SXin Li virtual void bar() = 0; 60*67e74705SXin Li virtual void baz(); // expected-warning {{function 'test4::(anonymous namespace)::A::baz' has internal linkage but is not defined}} 61*67e74705SXin Li }; 62*67e74705SXin Li } 63*67e74705SXin Li test(A & a)64*67e74705SXin Li void test(A &a) { 65*67e74705SXin Li a.foo(); // expected-note {{used here}} 66*67e74705SXin Li a.bar(); 67*67e74705SXin Li a.baz(); // expected-note {{used here}} 68*67e74705SXin Li } 69*67e74705SXin Li 70*67e74705SXin Li struct Test : A { Testtest4::Test71*67e74705SXin Li Test() {} // expected-note 2 {{used here}} 72*67e74705SXin Li }; 73*67e74705SXin Li } 74*67e74705SXin Li 75*67e74705SXin Li // rdar://problem/9014651 76*67e74705SXin Li namespace test5 { 77*67e74705SXin Li namespace { 78*67e74705SXin Li struct A {}; 79*67e74705SXin Li } 80*67e74705SXin Li 81*67e74705SXin Li template <class N> struct B { 82*67e74705SXin Li static int var; // expected-warning {{variable 'test5::B<test5::(anonymous namespace)::A>::var' has internal linkage but is not defined}} 83*67e74705SXin Li static void foo(); // expected-warning {{function 'test5::B<test5::(anonymous namespace)::A>::foo' has internal linkage but is not defined}} 84*67e74705SXin Li }; 85*67e74705SXin Li extern template int B<A>::var; 86*67e74705SXin Li test()87*67e74705SXin Li void test() { 88*67e74705SXin Li B<A>::var = 0; // expected-note {{used here}} 89*67e74705SXin Li B<A>::foo(); // expected-note {{used here}} 90*67e74705SXin Li } 91*67e74705SXin Li } 92*67e74705SXin Li 93*67e74705SXin Li namespace test6 { 94*67e74705SXin Li template <class T> struct A { 95*67e74705SXin Li static const int zero = 0; 96*67e74705SXin Li static const int one = 1; 97*67e74705SXin Li static const int two = 2; 98*67e74705SXin Li 99*67e74705SXin Li int value; 100*67e74705SXin Li Atest6::A101*67e74705SXin Li A() : value(zero) { 102*67e74705SXin Li value = one; 103*67e74705SXin Li } 104*67e74705SXin Li }; 105*67e74705SXin Li 106*67e74705SXin Li namespace { struct Internal; } 107*67e74705SXin Li test()108*67e74705SXin Li void test() { 109*67e74705SXin Li A<Internal> a; 110*67e74705SXin Li a.value = A<Internal>::two; 111*67e74705SXin Li } 112*67e74705SXin Li } 113*67e74705SXin Li 114*67e74705SXin Li // We support (as an extension) private, undefined copy constructors when 115*67e74705SXin Li // a temporary is bound to a reference even in C++98. Similarly, we shouldn't 116*67e74705SXin Li // warn about this copy constructor being used without a definition. 117*67e74705SXin Li namespace PR9323 { 118*67e74705SXin Li namespace { 119*67e74705SXin Li struct Uncopyable { UncopyablePR9323::__anon28cc8d9f0711::Uncopyable120*67e74705SXin Li Uncopyable() {} 121*67e74705SXin Li private: 122*67e74705SXin Li Uncopyable(const Uncopyable&); // expected-note {{declared private here}} 123*67e74705SXin Li }; 124*67e74705SXin Li } f(const Uncopyable &)125*67e74705SXin Li void f(const Uncopyable&) {} test()126*67e74705SXin Li void test() { 127*67e74705SXin Li f(Uncopyable()); 128*67e74705SXin Li #if __cplusplus <= 199711L // C++03 or earlier modes 129*67e74705SXin Li // expected-warning@-2 {{C++98 requires an accessible copy constructor}} 130*67e74705SXin Li #else 131*67e74705SXin Li // 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*67e74705SXin Li #endif 133*67e74705SXin Li }; 134*67e74705SXin Li } 135*67e74705SXin Li 136*67e74705SXin Li 137*67e74705SXin Li namespace std { class type_info; }; 138*67e74705SXin Li namespace cxx11_odr_rules { 139*67e74705SXin Li // Note: the way this test is written isn't really ideal, but there really 140*67e74705SXin Li // isn't any other way to check that the odr-used logic for constants 141*67e74705SXin Li // is working without working implicit capture in lambda-expressions. 142*67e74705SXin Li // (The more accurate used-but-not-defined warning is the only other visible 143*67e74705SXin Li // effect of accurate odr-used computation.) 144*67e74705SXin Li // 145*67e74705SXin Li // Note that the warning in question can trigger in cases some people would 146*67e74705SXin Li // consider false positives; hopefully that happens rarely in practice. 147*67e74705SXin Li // 148*67e74705SXin Li // FIXME: Suppressing this test while I figure out how to fix a bug in the 149*67e74705SXin Li // odr-use marking code. 150*67e74705SXin Li 151*67e74705SXin Li namespace { 152*67e74705SXin Li struct A { 153*67e74705SXin Li static const int unused = 10; 154*67e74705SXin Li static const int used1 = 20; // xpected-warning {{internal linkage}} 155*67e74705SXin Li static const int used2 = 20; // xpected-warning {{internal linkage}} ~Acxx11_odr_rules::__anon28cc8d9f0811::A156*67e74705SXin Li virtual ~A() {} 157*67e74705SXin Li }; 158*67e74705SXin Li } 159*67e74705SXin Li 160*67e74705SXin Li void a(int,int); p(const int &)161*67e74705SXin Li A& p(const int&) { static A a; return a; } 162*67e74705SXin Li 163*67e74705SXin Li // Check handling of default arguments 164*67e74705SXin Li void b(int = A::unused); 165*67e74705SXin Li tests()166*67e74705SXin Li void tests() { 167*67e74705SXin Li // Basic test 168*67e74705SXin Li a(A::unused, A::unused); 169*67e74705SXin Li 170*67e74705SXin Li // Check that nesting an unevaluated or constant-evaluated context does 171*67e74705SXin Li // the right thing. 172*67e74705SXin Li a(A::unused, sizeof(int[10])); 173*67e74705SXin Li 174*67e74705SXin Li // Check that the checks work with unevaluated contexts 175*67e74705SXin Li (void)sizeof(p(A::used1)); 176*67e74705SXin Li (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*67e74705SXin Li 178*67e74705SXin Li // Misc other testing 179*67e74705SXin Li a(A::unused, 1 ? A::used2 : A::used2); // xpected-note {{used here}} 180*67e74705SXin Li b(); 181*67e74705SXin Li } 182*67e74705SXin Li } 183*67e74705SXin Li 184*67e74705SXin Li 185*67e74705SXin Li namespace OverloadUse { 186*67e74705SXin Li namespace { 187*67e74705SXin Li void f(); 188*67e74705SXin Li void f(int); // expected-warning {{function 'OverloadUse::(anonymous namespace)::f' has internal linkage but is not defined}} 189*67e74705SXin Li } t(int *)190*67e74705SXin Li template<void x()> void t(int*) { x(); } t(long *)191*67e74705SXin Li template<void x(int)> void t(long*) { x(10); } // expected-note {{used here}} g()192*67e74705SXin Li void g() { long a; t<f>(&a); } 193*67e74705SXin Li } 194*67e74705SXin Li 195*67e74705SXin Li namespace test7 { 196*67e74705SXin Li typedef struct { 197*67e74705SXin Li void bar(); footest7::__anon28cc8d9f0a08198*67e74705SXin Li void foo() { 199*67e74705SXin Li bar(); 200*67e74705SXin Li } 201*67e74705SXin Li } A; 202*67e74705SXin Li } 203*67e74705SXin Li 204*67e74705SXin Li namespace test8 { 205*67e74705SXin Li typedef struct { 206*67e74705SXin Li void bar(); // expected-warning {{function 'test8::(anonymous struct)::bar' has internal linkage but is not defined}} footest8::__anon28cc8d9f0b08207*67e74705SXin Li void foo() { 208*67e74705SXin Li bar(); // expected-note {{used here}} 209*67e74705SXin Li } 210*67e74705SXin Li } *A; 211*67e74705SXin Li } 212*67e74705SXin Li 213*67e74705SXin Li namespace test9 { 214*67e74705SXin Li namespace { 215*67e74705SXin Li struct X { 216*67e74705SXin Li virtual void notused() = 0; 217*67e74705SXin Li virtual void used() = 0; // expected-warning {{function 'test9::(anonymous namespace)::X::used' has internal linkage but is not defined}} 218*67e74705SXin Li }; 219*67e74705SXin Li } test(X & x)220*67e74705SXin Li void test(X &x) { 221*67e74705SXin Li x.notused(); 222*67e74705SXin Li x.X::used(); // expected-note {{used here}} 223*67e74705SXin Li } 224*67e74705SXin Li } 225*67e74705SXin Li 226*67e74705SXin Li namespace test10 { 227*67e74705SXin Li namespace { 228*67e74705SXin Li struct X { 229*67e74705SXin Li virtual void notused() = 0; 230*67e74705SXin Li virtual void used() = 0; // expected-warning {{function 'test10::(anonymous namespace)::X::used' has internal linkage but is not defined}} 231*67e74705SXin Li testtest10::__anon28cc8d9f0d11::X232*67e74705SXin Li void test() { 233*67e74705SXin Li notused(); 234*67e74705SXin Li (void)&X::notused; 235*67e74705SXin Li (this->*&X::notused)(); 236*67e74705SXin Li X::used(); // expected-note {{used here}} 237*67e74705SXin Li } 238*67e74705SXin Li }; 239*67e74705SXin Li struct Y : X { 240*67e74705SXin Li using X::notused; 241*67e74705SXin Li }; 242*67e74705SXin Li } 243*67e74705SXin Li } 244*67e74705SXin Li 245*67e74705SXin Li namespace test11 { 246*67e74705SXin Li namespace { 247*67e74705SXin Li struct A { 248*67e74705SXin Li virtual bool operator()() const = 0; 249*67e74705SXin Li virtual void operator!() const = 0; 250*67e74705SXin Li virtual bool operator+(const A&) const = 0; 251*67e74705SXin Li virtual int operator[](int) const = 0; 252*67e74705SXin Li virtual const A* operator->() const = 0; 253*67e74705SXin Li int member; 254*67e74705SXin Li }; 255*67e74705SXin Li 256*67e74705SXin Li struct B { 257*67e74705SXin Li bool operator()() const; // expected-warning {{function 'test11::(anonymous namespace)::B::operator()' has internal linkage but is not defined}} 258*67e74705SXin Li void operator!() const; // expected-warning {{function 'test11::(anonymous namespace)::B::operator!' has internal linkage but is not defined}} 259*67e74705SXin Li bool operator+(const B&) const; // expected-warning {{function 'test11::(anonymous namespace)::B::operator+' has internal linkage but is not defined}} 260*67e74705SXin Li int operator[](int) const; // expected-warning {{function 'test11::(anonymous namespace)::B::operator[]' has internal linkage but is not defined}} 261*67e74705SXin Li const B* operator->() const; // expected-warning {{function 'test11::(anonymous namespace)::B::operator->' has internal linkage but is not defined}} 262*67e74705SXin Li int member; 263*67e74705SXin Li }; 264*67e74705SXin Li } 265*67e74705SXin Li test1(A & a1,A & a2)266*67e74705SXin Li void test1(A &a1, A &a2) { 267*67e74705SXin Li a1(); 268*67e74705SXin Li !a1; 269*67e74705SXin Li a1 + a2; 270*67e74705SXin Li a1[0]; 271*67e74705SXin Li (void)a1->member; 272*67e74705SXin Li } 273*67e74705SXin Li test2(B & b1,B & b2)274*67e74705SXin Li void test2(B &b1, B &b2) { 275*67e74705SXin Li b1(); // expected-note {{used here}} 276*67e74705SXin Li !b1; // expected-note {{used here}} 277*67e74705SXin Li b1 + b2; // expected-note {{used here}} 278*67e74705SXin Li b1[0]; // expected-note {{used here}} 279*67e74705SXin Li (void)b1->member; // expected-note {{used here}} 280*67e74705SXin Li } 281*67e74705SXin Li } 282*67e74705SXin Li 283*67e74705SXin Li namespace test12 { 284*67e74705SXin Li class T1 {}; class T2 {}; class T3 {}; class T4 {}; class T5 {}; class T6 {}; 285*67e74705SXin Li class T7 {}; 286*67e74705SXin Li 287*67e74705SXin Li namespace { 288*67e74705SXin Li struct Cls { 289*67e74705SXin Li virtual void f(int) = 0; 290*67e74705SXin Li virtual void f(int, double) = 0; 291*67e74705SXin Li void g(int); // expected-warning {{function 'test12::(anonymous namespace)::Cls::g' has internal linkage but is not defined}} 292*67e74705SXin Li void g(int, double); 293*67e74705SXin Li virtual operator T1() = 0; 294*67e74705SXin Li virtual operator T2() = 0; 295*67e74705SXin Li virtual operator T3&() = 0; 296*67e74705SXin Li operator T4(); // expected-warning {{function 'test12::(anonymous namespace)::Cls::operator T4' has internal linkage but is not defined}} 297*67e74705SXin Li operator T5(); // expected-warning {{function 'test12::(anonymous namespace)::Cls::operator T5' has internal linkage but is not defined}} 298*67e74705SXin Li operator T6&(); // expected-warning {{function 'test12::(anonymous namespace)::Cls::operator test12::T6 &' has internal linkage but is not defined}} 299*67e74705SXin Li }; 300*67e74705SXin Li 301*67e74705SXin Li struct Cls2 { 302*67e74705SXin Li Cls2(T7); // expected-warning {{function 'test12::(anonymous namespace)::Cls2::Cls2' has internal linkage but is not defined}} 303*67e74705SXin Li }; 304*67e74705SXin Li } 305*67e74705SXin Li test(Cls & c)306*67e74705SXin Li void test(Cls &c) { 307*67e74705SXin Li c.f(7); 308*67e74705SXin Li c.g(7); // expected-note {{used here}} 309*67e74705SXin Li (void)static_cast<T1>(c); 310*67e74705SXin Li T2 t2 = c; 311*67e74705SXin Li T3 &t3 = c; 312*67e74705SXin Li (void)static_cast<T4>(c); // expected-note {{used here}} 313*67e74705SXin Li T5 t5 = c; // expected-note {{used here}} 314*67e74705SXin Li T6 &t6 = c; // expected-note {{used here}} 315*67e74705SXin Li 316*67e74705SXin Li Cls2 obj1((T7())); // expected-note {{used here}} 317*67e74705SXin Li } 318*67e74705SXin Li } 319*67e74705SXin Li 320*67e74705SXin Li namespace test13 { 321*67e74705SXin Li namespace { 322*67e74705SXin Li struct X { ftest13::__anon28cc8d9f1011::X323*67e74705SXin Li virtual void f() { } 324*67e74705SXin Li }; 325*67e74705SXin Li 326*67e74705SXin Li struct Y : public X { 327*67e74705SXin Li virtual void f() = 0; 328*67e74705SXin Li gtest13::__anon28cc8d9f1011::Y329*67e74705SXin Li virtual void g() { 330*67e74705SXin Li X::f(); 331*67e74705SXin Li } 332*67e74705SXin Li }; 333*67e74705SXin Li } 334*67e74705SXin Li } 335*67e74705SXin Li 336*67e74705SXin Li namespace test14 { 337*67e74705SXin Li extern "C" const int foo; 338*67e74705SXin Li f()339*67e74705SXin Li int f() { 340*67e74705SXin Li return foo; 341*67e74705SXin Li } 342*67e74705SXin Li } 343