| // RUN: %clang_cc1 -fsyntax-only -verify -std=c++0x -Wsign-compare %s |
| |
| // C++ rules for ?: are a lot stricter than C rules, and have to take into |
| // account more conversion options. |
| // This test runs in C++0x mode for the contextual conversion of the condition. |
| |
| struct ToBool { explicit operator bool(); }; |
| |
| struct B; |
| struct A { A(); A(const B&); }; // expected-note 2 {{candidate constructor}} \ |
| // expected-note 2 {{candidate is the implicit copy constructor}} |
| struct B { operator A() const; }; // expected-note 2 {{candidate function}} |
| struct I { operator int(); }; |
| struct J { operator I(); }; |
| struct K { operator double(); }; |
| typedef void (*vfn)(); |
| struct F { operator vfn(); }; |
| struct G { operator vfn(); }; |
| |
| struct Base { |
| int trick(); |
| A trick() const; |
| void fn1(); |
| }; |
| struct Derived : Base { |
| void fn2(); |
| }; |
| struct Convertible { operator Base&(); }; |
| struct Priv : private Base {}; // expected-note 4 {{declared private here}} |
| struct Mid : Base {}; |
| struct Fin : Mid, Derived {}; |
| typedef void (Derived::*DFnPtr)(); |
| struct ToMemPtr { operator DFnPtr(); }; |
| |
| struct BadDerived; |
| struct BadBase { operator BadDerived&(); }; |
| struct BadDerived : BadBase {}; |
| |
| struct Fields { |
| int i1, i2, b1 : 3, b2 : 3; |
| }; |
| struct MixedFields { |
| int i; |
| volatile int vi; |
| const int ci; |
| const volatile int cvi; |
| }; |
| struct MixedFieldsDerived : MixedFields { |
| }; |
| |
| enum Enum { EVal }; |
| |
| struct Ambig { |
| operator short(); // expected-note 2 {{candidate function}} |
| operator signed char(); // expected-note 2 {{candidate function}} |
| }; |
| |
| void test() |
| { |
| // This function tests C++0x 5.16 |
| |
| // p1 (contextually convert to bool) |
| int i1 = ToBool() ? 0 : 1; |
| |
| // p2 (one or both void, and throwing) |
| i1 ? throw 0 : throw 1; |
| i1 ? test() : throw 1; |
| i1 ? throw 0 : test(); |
| i1 ? test() : test(); |
| i1 = i1 ? throw 0 : 0; |
| i1 = i1 ? 0 : throw 0; |
| i1 ? 0 : test(); // expected-error {{right operand to ? is void, but left operand is of type 'int'}} |
| i1 ? test() : 0; // expected-error {{left operand to ? is void, but right operand is of type 'int'}} |
| (i1 ? throw 0 : i1) = 0; // expected-error {{expression is not assignable}} |
| (i1 ? i1 : throw 0) = 0; // expected-error {{expression is not assignable}} |
| |
| // p3 (one or both class type, convert to each other) |
| // b1 (lvalues) |
| Base base; |
| Derived derived; |
| Convertible conv; |
| Base &bar1 = i1 ? base : derived; |
| Base &bar2 = i1 ? derived : base; |
| Base &bar3 = i1 ? base : conv; |
| Base &bar4 = i1 ? conv : base; |
| // these are ambiguous |
| BadBase bb; |
| BadDerived bd; |
| (void)(i1 ? bb : bd); // expected-error {{conditional expression is ambiguous; 'BadBase' can be converted to 'BadDerived' and vice versa}} |
| (void)(i1 ? bd : bb); // expected-error {{conditional expression is ambiguous}} |
| // curiously enough (and a defect?), these are not |
| // for rvalues, hierarchy takes precedence over other conversions |
| (void)(i1 ? BadBase() : BadDerived()); |
| (void)(i1 ? BadDerived() : BadBase()); |
| |
| // b2.1 (hierarchy stuff) |
| const Base constret(); |
| const Derived constder(); |
| // should use const overload |
| A a1((i1 ? constret() : Base()).trick()); |
| A a2((i1 ? Base() : constret()).trick()); |
| A a3((i1 ? constret() : Derived()).trick()); |
| A a4((i1 ? Derived() : constret()).trick()); |
| // should use non-const overload |
| i1 = (i1 ? Base() : Base()).trick(); |
| i1 = (i1 ? Base() : Base()).trick(); |
| i1 = (i1 ? Base() : Derived()).trick(); |
| i1 = (i1 ? Derived() : Base()).trick(); |
| // should fail: const lost |
| (void)(i1 ? Base() : constder()); // expected-error {{incompatible operand types ('Base' and 'Derived const')}} |
| (void)(i1 ? constder() : Base()); // expected-error {{incompatible operand types ('Derived const' and 'Base')}} |
| |
| Priv priv; |
| Fin fin; |
| (void)(i1 ? Base() : Priv()); // expected-error{{private base class}} |
| (void)(i1 ? Priv() : Base()); // expected-error{{private base class}} |
| (void)(i1 ? Base() : Fin()); // expected-error{{ambiguous conversion from derived class 'Fin' to base class 'Base':}} |
| (void)(i1 ? Fin() : Base()); // expected-error{{ambiguous conversion from derived class 'Fin' to base class 'Base':}} |
| (void)(i1 ? base : priv); // expected-error {{private base class}} |
| (void)(i1 ? priv : base); // expected-error {{private base class}} |
| (void)(i1 ? base : fin); // expected-error {{ambiguous conversion from derived class 'Fin' to base class 'Base':}} |
| (void)(i1 ? fin : base); // expected-error {{ambiguous conversion from derived class 'Fin' to base class 'Base':}} |
| |
| // b2.2 (non-hierarchy) |
| i1 = i1 ? I() : i1; |
| i1 = i1 ? i1 : I(); |
| I i2(i1 ? I() : J()); |
| I i3(i1 ? J() : I()); |
| // "the type [it] woud have if E2 were converted to an rvalue" |
| vfn pfn = i1 ? F() : test; |
| pfn = i1 ? test : F(); |
| (void)(i1 ? A() : B()); // expected-error {{conversion from 'B' to 'A' is ambiguous}} |
| (void)(i1 ? B() : A()); // expected-error {{conversion from 'B' to 'A' is ambiguous}} |
| (void)(i1 ? 1 : Ambig()); // expected-error {{conversion from 'Ambig' to 'int' is ambiguous}} |
| (void)(i1 ? Ambig() : 1); // expected-error {{conversion from 'Ambig' to 'int' is ambiguous}} |
| // By the way, this isn't an lvalue: |
| &(i1 ? i1 : i2); // expected-error {{address expression must be an lvalue or a function designator}} |
| |
| // p4 (lvalue, same type) |
| Fields flds; |
| int &ir1 = i1 ? flds.i1 : flds.i2; |
| (i1 ? flds.b1 : flds.i2) = 0; |
| (i1 ? flds.i1 : flds.b2) = 0; |
| (i1 ? flds.b1 : flds.b2) = 0; |
| |
| // p5 (conversion to built-in types) |
| // GCC 4.3 fails these |
| double d1 = i1 ? I() : K(); |
| pfn = i1 ? F() : G(); |
| DFnPtr pfm; |
| pfm = i1 ? DFnPtr() : &Base::fn1; |
| pfm = i1 ? &Base::fn1 : DFnPtr(); |
| |
| // p6 (final conversions) |
| i1 = i1 ? i1 : ir1; |
| int *pi1 = i1 ? &i1 : 0; |
| pi1 = i1 ? 0 : &i1; |
| i1 = i1 ? i1 : EVal; |
| i1 = i1 ? EVal : i1; |
| d1 = i1 ? 'c' : 4.0; |
| d1 = i1 ? 4.0 : 'c'; |
| Base *pb = i1 ? (Base*)0 : (Derived*)0; |
| pb = i1 ? (Derived*)0 : (Base*)0; |
| pfm = i1 ? &Base::fn1 : &Derived::fn2; |
| pfm = i1 ? &Derived::fn2 : &Base::fn1; |
| pfm = i1 ? &Derived::fn2 : 0; |
| pfm = i1 ? 0 : &Derived::fn2; |
| const int (MixedFieldsDerived::*mp1) = |
| i1 ? &MixedFields::ci : &MixedFieldsDerived::i; |
| const volatile int (MixedFields::*mp2) = |
| i1 ? &MixedFields::ci : &MixedFields::cvi; |
| (void)(i1 ? &MixedFields::ci : &MixedFields::vi); |
| // Conversion of primitives does not result in an lvalue. |
| &(i1 ? i1 : d1); // expected-error {{address expression must be an lvalue or a function designator}} |
| |
| (void)&(i1 ? flds.b1 : flds.i1); // expected-error {{address of bit-field requested}} |
| (void)&(i1 ? flds.i1 : flds.b1); // expected-error {{address of bit-field requested}} |
| |
| |
| unsigned long test0 = 5; |
| test0 = test0 ? (long) test0 : test0; // expected-warning {{operands of ? are integers of different signs}} |
| test0 = test0 ? (int) test0 : test0; // expected-warning {{operands of ? are integers of different signs}} |
| test0 = test0 ? (short) test0 : test0; // expected-warning {{operands of ? are integers of different signs}} |
| test0 = test0 ? test0 : (long) test0; // expected-warning {{operands of ? are integers of different signs}} |
| test0 = test0 ? test0 : (int) test0; // expected-warning {{operands of ? are integers of different signs}} |
| test0 = test0 ? test0 : (short) test0; // expected-warning {{operands of ? are integers of different signs}} |
| test0 = test0 ? test0 : (long) 10; |
| test0 = test0 ? test0 : (int) 10; |
| test0 = test0 ? test0 : (short) 10; |
| test0 = test0 ? (long) 10 : test0; |
| test0 = test0 ? (int) 10 : test0; |
| test0 = test0 ? (short) 10 : test0; |
| |
| test0 = test0 ? EVal : test0; |
| test0 = test0 ? EVal : (int) test0; |
| |
| // Note the thing that this does not test: since DR446, various situations |
| // *must* create a separate temporary copy of class objects. This can only |
| // be properly tested at runtime, though. |
| } |
| |
| namespace PR6595 { |
| struct String { |
| String(const char *); |
| operator const char*() const; |
| }; |
| |
| void f(bool Cond, String S) { |
| (void)(Cond? S : ""); |
| (void)(Cond? "" : S); |
| const char a[1] = {'a'}; |
| (void)(Cond? S : a); |
| (void)(Cond? a : S); |
| } |
| } |
| |
| namespace PR6757 { |
| struct Foo1 { |
| Foo1(); |
| Foo1(const Foo1&); |
| }; |
| |
| struct Foo2 { }; |
| |
| struct Foo3 { |
| Foo3(); |
| Foo3(Foo3&); |
| }; |
| |
| struct Bar { |
| operator const Foo1&() const; |
| operator const Foo2&() const; |
| operator const Foo3&() const; |
| }; |
| |
| void f() { |
| (void)(true ? Bar() : Foo1()); // okay |
| (void)(true ? Bar() : Foo2()); // okay |
| // FIXME: Diagnostic below could be improved |
| (void)(true ? Bar() : Foo3()); // expected-error{{incompatible operand types ('PR6757::Bar' and 'PR6757::Foo3')}} |
| } |
| } |