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// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
namespace Constructor {
struct A {
A(int);
};
struct B {
explicit B(int);
};
B::B(int) { }
struct C {
void f(const A&);
void f(const B&);
};
void f(C c) {
c.f(10);
}
}
namespace Conversion {
struct A {
operator int();
explicit operator bool();
};
A::operator bool() { return false; }
struct B {
void f(int);
void f(bool);
};
void f(A a, B b) {
b.f(a);
}
void testExplicit()
{
// Taken from 12.3.2p2
class Y { }; // expected-note {{candidate constructor (the implicit copy constructor) not viable: no known conversion from 'Z' to 'const Y &' for 1st argument}} \
expected-note {{candidate constructor (the implicit move constructor) not viable: no known conversion from 'Z' to 'Y &&' for 1st argument}} \
expected-note {{candidate constructor (the implicit copy constructor) not viable: no known conversion from 'Z' to 'const Y &' for 1st argument}} \
expected-note {{candidate constructor (the implicit move constructor) not viable: no known conversion from 'Z' to 'Y &&' for 1st argument}}
struct Z {
explicit operator Y() const;
explicit operator int() const;
};
Z z;
// 13.3.1.4p1 & 8.5p16:
Y y2 = z; // expected-error {{no viable conversion from 'Z' to 'Y'}}
Y y3 = (Y)z;
Y y4 = Y(z);
Y y5 = static_cast<Y>(z);
// 13.3.1.5p1 & 8.5p16:
int i1 = (int)z;
int i2 = int(z);
int i3 = static_cast<int>(z);
int i4(z);
// 13.3.1.6p1 & 8.5.3p5:
const Y& y6 = z; // expected-error {{no viable conversion from 'Z' to 'const Y'}}
const int& y7(z);
}
void testBool() {
struct Bool {
operator bool();
};
struct NotBool {
explicit operator bool(); // expected-note {{conversion to integral type 'bool'}}
};
Bool b;
NotBool n;
(void) (1 + b);
(void) (1 + n); // expected-error {{invalid operands to binary expression ('int' and 'NotBool')}}
// 5.3.1p9:
(void) (!b);
(void) (!n);
// 5.14p1:
(void) (b && true);
(void) (n && true);
// 5.15p1:
(void) (b || true);
(void) (n || true);
// 5.16p1:
(void) (b ? 0 : 1);
(void) (n ? 0: 1);
// 5.19p5:
// TODO: After constexpr has been implemented
// 6.4p4:
if (b) {}
if (n) {}
// 6.4.2p2:
switch (b) {} // expected-warning {{switch condition has boolean value}}
switch (n) {} // expected-error {{switch condition type 'NotBool' requires explicit conversion to 'bool'}} \
expected-warning {{switch condition has boolean value}}
// 6.5.1:
while (b) {}
while (n) {}
// 6.5.2p1:
do {} while (b);
do {} while (n);
// 6.5.3:
for (;b;) {}
for (;n;) {}
}
void testNew()
{
// 5.3.4p6:
struct Int {
operator int();
};
struct NotInt {
explicit operator int(); // expected-note {{conversion to integral type 'int' declared here}}
};
Int i;
NotInt ni;
new int[i];
new int[ni]; // expected-error {{array size expression of type 'NotInt' requires explicit conversion to type 'int'}}
}
void testDelete()
{
// 5.3.5pp2:
struct Ptr {
operator int*();
};
struct NotPtr {
explicit operator int*();
};
Ptr p;
NotPtr np;
delete p;
delete np; // expected-error {{cannot delete expression of type 'NotPtr'}}
}
void testFunctionPointer()
{
// 13.3.1.1.2p2:
using Func = void(*)(int);
struct FP {
operator Func();
};
struct NotFP {
explicit operator Func();
};
FP fp;
NotFP nfp;
fp(1);
nfp(1); // expected-error {{type 'NotFP' does not provide a call operator}}
}
}
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