| // RUN: clang -fsyntax-only -verify %s |
| |
| struct A {}; |
| struct B : public A {}; // Single public base. |
| struct C1 : public virtual B {}; // Single virtual base. |
| struct C2 : public virtual B {}; |
| struct D : public C1, public C2 {}; // Diamond |
| struct E : private A {}; // Single private base. |
| struct F : public C1 {}; // Single path to B with virtual. |
| struct G1 : public B {}; |
| struct G2 : public B {}; |
| struct H : public G1, public G2 {}; // Ambiguous path to B. |
| |
| enum Enum { En1, En2 }; |
| enum Onom { On1, On2 }; |
| |
| // Explicit implicits |
| void t_529_2() |
| { |
| int i = 1; |
| (void)static_cast<float>(i); |
| double d = 1.0; |
| (void)static_cast<float>(d); |
| (void)static_cast<int>(d); |
| (void)static_cast<char>(i); |
| (void)static_cast<unsigned long>(i); |
| (void)static_cast<int>(En1); |
| (void)static_cast<double>(En1); |
| (void)static_cast<int&>(i); |
| (void)static_cast<const int&>(i); |
| |
| int ar[1]; |
| (void)static_cast<const int*>(ar); |
| (void)static_cast<void (*)()>(t_529_2); |
| |
| (void)static_cast<void*>(0); |
| (void)static_cast<void*>((int*)0); |
| (void)static_cast<volatile const void*>((const int*)0); |
| (void)static_cast<A*>((B*)0); |
| (void)static_cast<A&>(*((B*)0)); |
| (void)static_cast<const B*>((C1*)0); |
| (void)static_cast<B&>(*((C1*)0)); |
| (void)static_cast<A*>((D*)0); |
| (void)static_cast<const A&>(*((D*)0)); |
| (void)static_cast<int B::*>((int A::*)0); |
| (void)static_cast<void (B::*)()>((void (A::*)())0); |
| |
| // TODO: User-defined conversions |
| |
| // Bad code below |
| |
| (void)static_cast<void*>((const int*)0); // expected-error {{static_cast from 'int const *' to 'void *' is not allowed}} |
| //(void)static_cast<A*>((E*)0); // {{static_cast from 'struct E *' to 'struct A *' is not allowed}} |
| //(void)static_cast<A*>((H*)0); // {{static_cast from 'struct H *' to 'struct A *' is not allowed}} |
| (void)static_cast<int>((int*)0); // expected-error {{static_cast from 'int *' to 'int' is not allowed}} |
| (void)static_cast<A**>((B**)0); // expected-error {{static_cast from 'struct B **' to 'struct A **' is not allowed}} |
| (void)static_cast<char&>(i); // expected-error {{non-const lvalue reference to type 'char' cannot be initialized with a value of type 'int'}} |
| } |
| |
| // Anything to void |
| void t_529_4() |
| { |
| static_cast<void>(1); |
| static_cast<void>(t_529_4); |
| } |
| |
| // Static downcasts |
| void t_529_5_8() |
| { |
| (void)static_cast<B*>((A*)0); |
| (void)static_cast<B&>(*((A*)0)); |
| (void)static_cast<const G1*>((A*)0); |
| (void)static_cast<const G1&>(*((A*)0)); |
| |
| // Bad code below |
| |
| (void)static_cast<C1*>((A*)0); // expected-error {{cannot cast 'struct A *' to 'struct C1 *' via virtual base 'struct B'}} |
| (void)static_cast<C1&>(*((A*)0)); // expected-error {{cannot cast 'struct A' to 'struct C1 &' via virtual base 'struct B'}} |
| (void)static_cast<D*>((A*)0); // expected-error {{cannot cast 'struct A *' to 'struct D *' via virtual base 'struct B'}} |
| (void)static_cast<D&>(*((A*)0)); // expected-error {{cannot cast 'struct A' to 'struct D &' via virtual base 'struct B'}} |
| (void)static_cast<B*>((const A*)0); // expected-error {{static_cast from 'struct A const *' to 'struct B *' casts away constness}} |
| (void)static_cast<B&>(*((const A*)0)); // expected-error {{static_cast from 'struct A const' to 'struct B &' casts away constness}} |
| // Accessibility is not yet tested |
| //(void)static_cast<E*>((A*)0); // {{static_cast from 'struct A *' to 'struct E *' is not allowed}} |
| //(void)static_cast<E&>(*((A*)0)); // {{static_cast from 'struct A' to 'struct E &' is not allowed}} |
| (void)static_cast<H*>((A*)0); // expected-error {{ambiguous static_cast from base 'struct A' to derived 'struct H':\n struct A -> struct B -> struct G1 -> struct H\n struct A -> struct B -> struct G2 -> struct H}} |
| (void)static_cast<H&>(*((A*)0)); // expected-error {{ambiguous static_cast from base 'struct A' to derived 'struct H':\n struct A -> struct B -> struct G1 -> struct H\n struct A -> struct B -> struct G2 -> struct H}} |
| (void)static_cast<E*>((B*)0); // expected-error {{static_cast from 'struct B *' to 'struct E *' is not allowed}} |
| (void)static_cast<E&>(*((B*)0)); // expected-error {{non-const lvalue reference to type 'struct E' cannot be initialized with a value of type 'struct B'}} |
| |
| // TODO: Test inaccessible base in context where it's accessible, i.e. |
| // member function and friend. |
| |
| // TODO: Test DR427. This requires user-defined conversions, though. |
| } |
| |
| // Enum conversions |
| void t_529_7() |
| { |
| (void)static_cast<Enum>(1); |
| (void)static_cast<Enum>(1.0); |
| (void)static_cast<Onom>(En1); |
| |
| // Bad code below |
| |
| (void)static_cast<Enum>((int*)0); // expected-error {{static_cast from 'int *' to 'enum Enum' is not allowed}} |
| } |
| |
| // Void pointer to object pointer |
| void t_529_10() |
| { |
| (void)static_cast<int*>((void*)0); |
| (void)static_cast<const A*>((void*)0); |
| |
| // Bad code below |
| |
| (void)static_cast<int*>((const void*)0); // expected-error {{static_cast from 'void const *' to 'int *' casts away constness}} |
| (void)static_cast<void (*)()>((void*)0); // expected-error {{static_cast from 'void *' to 'void (*)(void)' is not allowed}} |
| } |
| |
| // Member pointer upcast. |
| void t_529_9() |
| { |
| (void)static_cast<int A::*>((int B::*)0); |
| |
| // Bad code below |
| (void)static_cast<int A::*>((int H::*)0); // expected-error {{ambiguous conversion from pointer to member of derived class 'struct H'}} |
| (void)static_cast<int A::*>((int F::*)0); // expected-error {{conversion from pointer to member of class 'struct F'}} |
| } |