370 lines
12 KiB
C++
370 lines
12 KiB
C++
|
// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -fsyntax-only -verify -std=c++11 -Wsign-conversion %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++11 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}}
|
||
|
|
};
|
||
|
|
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}}
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Abstract {
|
||
|
|
virtual ~Abstract() = 0; // expected-note {{unimplemented pure virtual method '~Abstract' in 'Abstract'}}
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Derived1: Abstract {
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Derived2: Abstract {
|
||
|
|
};
|
||
|
|
|
||
|
|
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 = 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)
|
||
|
|
extern const Base constret();
|
||
|
|
extern 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 'const Derived')}}
|
||
|
|
(void)(i1 ? constder() : Base()); // expected-error {{incompatible operand types ('const Derived' 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 {{cannot take the address of an rvalue}}
|
||
|
|
|
||
|
|
// 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 {{cannot take the address of an rvalue}}
|
||
|
|
|
||
|
|
(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 {{operand of ? changes signedness: 'long' to 'unsigned long'}}
|
||
|
|
test0 = test0 ? (int) test0 : test0; // expected-warning {{operand of ? changes signedness: 'int' to 'unsigned long'}}
|
||
|
|
test0 = test0 ? (short) test0 : test0; // expected-warning {{operand of ? changes signedness: 'short' to 'unsigned long'}}
|
||
|
|
test0 = test0 ? test0 : (long) test0; // expected-warning {{operand of ? changes signedness: 'long' to 'unsigned long'}}
|
||
|
|
test0 = test0 ? test0 : (int) test0; // expected-warning {{operand of ? changes signedness: 'int' to 'unsigned long'}}
|
||
|
|
test0 = test0 ? test0 : (short) test0; // expected-warning {{operand of ? changes signedness: 'short' to 'unsigned long'}}
|
||
|
|
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;
|
||
|
|
|
||
|
|
int test1;
|
||
|
|
test0 = test0 ? EVal : test0;
|
||
|
|
test1 = test0 ? EVal : (int) test0;
|
||
|
|
|
||
|
|
test0 = test0 ? EVal : test1; // expected-warning {{operand of ? changes signedness: 'int' to 'unsigned long'}}
|
||
|
|
test0 = test0 ? test1 : EVal; // expected-warning {{operand of ? changes signedness: 'int' to 'unsigned long'}}
|
||
|
|
|
||
|
|
test1 = test0 ? EVal : (int) test0;
|
||
|
|
test1 = test0 ? (int) test0 : EVal;
|
||
|
|
|
||
|
|
// 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.
|
||
|
|
|
||
|
|
const Abstract &a = true ? static_cast<const Abstract&>(Derived1()) : Derived2(); // expected-error {{allocating an object of abstract class type 'const Abstract'}}
|
||
|
|
true ? static_cast<const Abstract&>(Derived1()) : throw 3; // expected-error {{allocating an object of abstract class type 'const Abstract'}}
|
||
|
|
}
|
||
|
|
|
||
|
|
namespace PR6595 {
|
||
|
|
struct OtherString {
|
||
|
|
OtherString();
|
||
|
|
OtherString(const char*);
|
||
|
|
};
|
||
|
|
|
||
|
|
struct String {
|
||
|
|
String(const char *);
|
||
|
|
String(const OtherString&);
|
||
|
|
operator const char*() const;
|
||
|
|
};
|
||
|
|
|
||
|
|
void f(bool Cond, String S, OtherString OS) {
|
||
|
|
(void)(Cond? S : "");
|
||
|
|
(void)(Cond? "" : S);
|
||
|
|
const char a[1] = {'a'};
|
||
|
|
(void)(Cond? S : a);
|
||
|
|
(void)(Cond? a : S);
|
||
|
|
(void)(Cond? OS : S);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
namespace PR6757 {
|
||
|
|
struct Foo1 {
|
||
|
|
Foo1();
|
||
|
|
Foo1(const Foo1&);
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Foo2 { };
|
||
|
|
|
||
|
|
struct Foo3 {
|
||
|
|
Foo3();
|
||
|
|
Foo3(Foo3&); // expected-note{{would lose const qualifier}}
|
||
|
|
};
|
||
|
|
|
||
|
|
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
|
||
|
|
(void)(true ? Bar() : Foo3()); // expected-error{{no viable constructor copying temporary}}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Reduced from selfhost.
|
||
|
|
namespace test1 {
|
||
|
|
struct A {
|
||
|
|
enum Foo {
|
||
|
|
fa, fb, fc, fd, fe, ff
|
||
|
|
};
|
||
|
|
|
||
|
|
Foo x();
|
||
|
|
};
|
||
|
|
|
||
|
|
void foo(int);
|
||
|
|
|
||
|
|
void test(A *a) {
|
||
|
|
foo(a ? a->x() : 0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
namespace rdar7998817 {
|
||
|
|
class X {
|
||
|
|
X(X&); // expected-note{{declared private here}}
|
||
|
|
|
||
|
|
struct ref { };
|
||
|
|
|
||
|
|
public:
|
||
|
|
X();
|
||
|
|
X(ref);
|
||
|
|
|
||
|
|
operator ref();
|
||
|
|
};
|
||
|
|
|
||
|
|
void f(bool B) {
|
||
|
|
X x;
|
||
|
|
(void)(B? x // expected-error{{calling a private constructor of class 'rdar7998817::X'}}
|
||
|
|
: X());
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
namespace PR7598 {
|
||
|
|
enum Enum {
|
||
|
|
v = 1,
|
||
|
|
};
|
||
|
|
|
||
|
|
const Enum g() {
|
||
|
|
return v;
|
||
|
|
}
|
||
|
|
|
||
|
|
const volatile Enum g2() {
|
||
|
|
return v;
|
||
|
|
}
|
||
|
|
|
||
|
|
void f() {
|
||
|
|
const Enum v2 = v;
|
||
|
|
Enum e = false ? g() : v;
|
||
|
|
Enum e2 = false ? v2 : v;
|
||
|
|
Enum e3 = false ? g2() : v;
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
namespace PR9236 {
|
||
|
|
#define NULL 0L
|
||
|
|
void f() {
|
||
|
|
int i;
|
||
|
|
(void)(true ? A() : NULL); // expected-error{{non-pointer operand type 'A' incompatible with NULL}}
|
||
|
|
(void)(true ? NULL : A()); // expected-error{{non-pointer operand type 'A' incompatible with NULL}}
|
||
|
|
(void)(true ? 0 : A()); // expected-error{{incompatible operand types}}
|
||
|
|
(void)(true ? nullptr : A()); // expected-error{{non-pointer operand type 'A' incompatible with nullptr}}
|
||
|
|
(void)(true ? nullptr : i); // expected-error{{non-pointer operand type 'int' incompatible with nullptr}}
|
||
|
|
(void)(true ? __null : A()); // expected-error{{non-pointer operand type 'A' incompatible with NULL}}
|
||
|
|
(void)(true ? (void*)0 : A()); // expected-error{{incompatible operand types}}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
namespace DR587 {
|
||
|
|
template<typename T>
|
||
|
|
const T *f(bool b) {
|
||
|
|
static T t1 = T();
|
||
|
|
static const T t2 = T();
|
||
|
|
return &(b ? t1 : t2);
|
||
|
|
}
|
||
|
|
struct S {};
|
||
|
|
template const int *f(bool);
|
||
|
|
template const S *f(bool);
|
||
|
|
|
||
|
|
extern bool b;
|
||
|
|
int i = 0;
|
||
|
|
const int ci = 0;
|
||
|
|
volatile int vi = 0;
|
||
|
|
const volatile int cvi = 0;
|
||
|
|
|
||
|
|
const int &cir = b ? i : ci;
|
||
|
|
volatile int &vir = b ? vi : i;
|
||
|
|
const volatile int &cvir1 = b ? ci : cvi;
|
||
|
|
const volatile int &cvir2 = b ? cvi : vi;
|
||
|
|
const volatile int &cvir3 = b ? ci : vi; // expected-error{{volatile lvalue reference to type 'const volatile int' cannot bind to a temporary of type 'int'}}
|
||
|
|
}
|