forked from OSchip/llvm-project
291 lines
6.6 KiB
C++
291 lines
6.6 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++0x
|
|
namespace T1 {
|
|
|
|
class A {
|
|
virtual int f(); // expected-note{{overridden virtual function is here}}
|
|
};
|
|
|
|
class B : A {
|
|
virtual void f(); // expected-error{{virtual function 'f' has a different return type ('void') than the function it overrides (which has return type 'int')}}
|
|
};
|
|
|
|
}
|
|
|
|
namespace T2 {
|
|
|
|
struct a { };
|
|
struct b { };
|
|
|
|
class A {
|
|
virtual a* f(); // expected-note{{overridden virtual function is here}}
|
|
};
|
|
|
|
class B : A {
|
|
virtual b* f(); // expected-error{{return type of virtual function 'f' is not covariant with the return type of the function it overrides ('T2::b *' is not derived from 'T2::a *')}}
|
|
};
|
|
|
|
}
|
|
|
|
namespace T3 {
|
|
|
|
struct a { };
|
|
struct b : private a { }; // expected-note{{declared private here}}
|
|
|
|
class A {
|
|
virtual a* f(); // expected-note{{overridden virtual function is here}}
|
|
};
|
|
|
|
class B : A {
|
|
virtual b* f(); // expected-error{{invalid covariant return for virtual function: 'T3::a' is a private base class of 'T3::b'}}
|
|
};
|
|
|
|
}
|
|
|
|
namespace T4 {
|
|
|
|
struct a { };
|
|
struct a1 : a { };
|
|
struct b : a, a1 { };
|
|
|
|
class A {
|
|
virtual a* f(); // expected-note{{overridden virtual function is here}}
|
|
};
|
|
|
|
class B : A {
|
|
virtual b* f(); // expected-error{{return type of virtual function 'f' is not covariant with the return type of the function it overrides (ambiguous conversion from derived class 'T4::b' to base class 'T4::a':\n\
|
|
struct T4::b -> struct T4::a\n\
|
|
struct T4::b -> struct T4::a1 -> struct T4::a)}}
|
|
};
|
|
|
|
}
|
|
|
|
namespace T5 {
|
|
|
|
struct a { };
|
|
|
|
class A {
|
|
virtual a* const f();
|
|
virtual a* const g(); // expected-note{{overridden virtual function is here}}
|
|
};
|
|
|
|
class B : A {
|
|
virtual a* const f();
|
|
virtual a* g(); // expected-error{{return type of virtual function 'g' is not covariant with the return type of the function it overrides ('T5::a *' has different qualifiers than 'T5::a *const')}}
|
|
};
|
|
|
|
}
|
|
|
|
namespace T6 {
|
|
|
|
struct a { };
|
|
|
|
class A {
|
|
virtual const a* f();
|
|
virtual a* g(); // expected-note{{overridden virtual function is here}}
|
|
};
|
|
|
|
class B : A {
|
|
virtual a* f();
|
|
virtual const a* g(); // expected-error{{return type of virtual function 'g' is not covariant with the return type of the function it overrides (class type 'const T6::a *' is more qualified than class type 'T6::a *'}}
|
|
};
|
|
|
|
}
|
|
|
|
namespace T7 {
|
|
struct a { };
|
|
struct b { };
|
|
|
|
class A {
|
|
a* f();
|
|
};
|
|
|
|
class B : A {
|
|
virtual b* f();
|
|
};
|
|
}
|
|
|
|
namespace T8 {
|
|
struct a { };
|
|
struct b; // expected-note {{forward declaration of 'T8::b'}}
|
|
|
|
class A {
|
|
virtual a *f();
|
|
};
|
|
|
|
class B : A {
|
|
b* f(); // expected-error {{return type of virtual function 'f' is not covariant with the return type of the function it overrides ('T8::b' is incomplete)}}
|
|
};
|
|
}
|
|
|
|
namespace T9 {
|
|
struct a { };
|
|
|
|
template<typename T> struct b : a {
|
|
int a[sizeof(T) ? -1 : -1]; // expected-error {{array with a negative size}}
|
|
};
|
|
|
|
class A {
|
|
virtual a *f();
|
|
};
|
|
|
|
class B : A {
|
|
virtual b<int> *f(); // expected-note {{in instantiation of template class 'T9::b<int>' requested here}}
|
|
};
|
|
}
|
|
|
|
// PR5656
|
|
class X0 {
|
|
virtual void f0();
|
|
};
|
|
class X1 : public X0 {
|
|
void f0() = 0;
|
|
};
|
|
|
|
template <typename Base>
|
|
struct Foo : Base {
|
|
void f(int) = 0; // expected-error{{not virtual and cannot be declared pure}}
|
|
};
|
|
|
|
struct Base1 { virtual void f(int); };
|
|
struct Base2 { };
|
|
|
|
void test() {
|
|
(void)sizeof(Foo<Base1>);
|
|
(void)sizeof(Foo<Base2>); // expected-note{{instantiation}}
|
|
}
|
|
|
|
template<typename Base>
|
|
struct Foo2 : Base {
|
|
template<typename T> int f(T);
|
|
};
|
|
|
|
void test2() {
|
|
Foo2<Base1> f1;
|
|
Foo2<Base2> f2;
|
|
f1.f(17);
|
|
f2.f(17);
|
|
};
|
|
|
|
struct Foo3 {
|
|
virtual void f(int) = 0; // expected-note{{pure virtual function}}
|
|
};
|
|
|
|
template<typename T>
|
|
struct Bar3 : Foo3 {
|
|
void f(T);
|
|
};
|
|
|
|
void test3() {
|
|
Bar3<int> b3i; // okay
|
|
Bar3<float> b3f; // expected-error{{is an abstract class}}
|
|
}
|
|
|
|
// 5920
|
|
namespace PR5920 {
|
|
class Base {};
|
|
|
|
template <typename T>
|
|
class Derived : public Base {};
|
|
|
|
class Foo {
|
|
public:
|
|
virtual Base* Method();
|
|
};
|
|
|
|
class Bar : public Foo {
|
|
public:
|
|
virtual Derived<int>* Method();
|
|
};
|
|
}
|
|
|
|
// Look through template types and typedefs to see whether return types are
|
|
// pointers or references.
|
|
namespace PR6110 {
|
|
class Base {};
|
|
class Derived : public Base {};
|
|
|
|
typedef Base* BaseP;
|
|
typedef Derived* DerivedP;
|
|
|
|
class X { virtual BaseP f(); };
|
|
class X1 : public X { virtual DerivedP f(); };
|
|
|
|
template <typename T> class Y { virtual T f(); };
|
|
template <typename T1, typename T> class Y1 : public Y<T> { virtual T1 f(); };
|
|
Y1<Derived*, Base*> y;
|
|
}
|
|
|
|
// Defer checking for covariance if either return type is dependent.
|
|
namespace type_dependent_covariance {
|
|
struct B {};
|
|
template <int N> struct TD : public B {};
|
|
template <> struct TD<1> {};
|
|
|
|
template <int N> struct TB {};
|
|
struct D : public TB<0> {};
|
|
|
|
template <int N> struct X {
|
|
virtual B* f1(); // expected-note{{overridden virtual function is here}}
|
|
virtual TB<N>* f2(); // expected-note{{overridden virtual function is here}}
|
|
};
|
|
template <int N, int M> struct X1 : X<N> {
|
|
virtual TD<M>* f1(); // expected-error{{return type of virtual function 'f1' is not covariant with the return type of the function it overrides ('TD<1> *'}}
|
|
virtual D* f2(); // expected-error{{return type of virtual function 'f2' is not covariant with the return type of the function it overrides ('type_dependent_covariance::D *' is not derived from 'TB<1> *')}}
|
|
};
|
|
|
|
X1<0, 0> good;
|
|
X1<0, 1> bad_derived; // expected-note{{instantiation}}
|
|
X1<1, 0> bad_base; // expected-note{{instantiation}}
|
|
}
|
|
|
|
namespace T10 {
|
|
struct A { };
|
|
struct B : A { };
|
|
|
|
struct C {
|
|
virtual A&& f();
|
|
};
|
|
|
|
struct D : C {
|
|
virtual B&& f();
|
|
};
|
|
};
|
|
|
|
namespace T11 {
|
|
struct A { };
|
|
struct B : A { };
|
|
|
|
struct C {
|
|
virtual A& f(); // expected-note {{overridden virtual function is here}}
|
|
};
|
|
|
|
struct D : C {
|
|
virtual B&& f(); // expected-error {{virtual function 'f' has a different return type ('T11::B &&') than the function it overrides (which has return type 'T11::A &')}}
|
|
};
|
|
};
|
|
|
|
namespace T12 {
|
|
struct A { };
|
|
struct B : A { };
|
|
|
|
struct C {
|
|
virtual A&& f(); // expected-note {{overridden virtual function is here}}
|
|
};
|
|
|
|
struct D : C {
|
|
virtual B& f(); // expected-error {{virtual function 'f' has a different return type ('T12::B &') than the function it overrides (which has return type 'T12::A &&')}}
|
|
};
|
|
};
|
|
|
|
namespace PR8168 {
|
|
class A {
|
|
public:
|
|
virtual void foo() {} // expected-note{{overridden virtual function is here}}
|
|
};
|
|
|
|
class B : public A {
|
|
public:
|
|
static void foo() {} // expected-error{{'static' member function 'foo' overrides a virtual function}}
|
|
};
|
|
}
|