blob: ba2c36d99daf6236634ae14c6cc56f761da60fe5 [file] [log] [blame]
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++2a %s
namespace Constructor {
struct A {
A(int);
};
struct B { // expected-note+ {{candidate}}
explicit B(int); // expected-note {{not a candidate}}
};
B::B(int) { } // expected-note+ {{here}}
struct C {
void f(const A&);
void f(const B&);
};
void f(C c) {
c.f(10);
}
A a0 = 0;
A a1(0);
A &&a2 = 0;
A &&a3(0);
A a4{0};
A &&a5 = {0};
A &&a6{0};
B b0 = 0; // expected-error {{no viable conversion}}
B b1(0);
B &&b2 = 0; // expected-error {{could not bind}}
B &&b3(0); // expected-error {{could not bind}}
B b4{0};
B &&b5 = {0}; // expected-error {{chosen constructor is explicit}}
B &&b6{0};
struct S {
template <bool b = true>
explicit S();
};
struct T : S {
// T();
};
struct U : T {
U();
};
U::U() {}
}
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 X { X(); };
class Y { }; // expected-note+ {{candidate constructor (the implicit}}
struct Z {
explicit operator X() const;
explicit operator Y() const; // expected-note 2{{not a candidate}}
explicit operator int() const; // expected-note {{not a candidate}}
};
Z z;
// 13.3.1.4p1 & 8.5p16:
Y y2 = z; // expected-error {{no viable conversion from 'Z' to 'Y'}}
Y y2b(z);
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; // expected-error {{no viable conversion from 'Z' to 'const int'}}
const Y& y8(z);
const int& y9(z);
// Y is an aggregate, so aggregate-initialization is performed and the
// conversion function is not considered.
const Y y10{z}; // expected-error {{excess elements}}
const Y& y11{z}; // expected-error {{excess elements}} expected-note {{in initialization of temporary of type 'const Y'}}
const int& y12{z};
// X is not an aggregate, so constructors are considered,
// per 13.3.3.1/4 & DR1467.
const X x1{z};
const X& x2{z};
}
void testBool() {
struct Bool {
operator bool();
};
struct NotBool {
explicit operator bool(); // expected-note {{conversion to integral type 'bool'}} expected-note 4{{explicit conversion function is not a candidate}}
};
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;) {}
// 13.3.1.5p1:
bool direct1(b);
bool direct2(n);
int direct3(b);
int direct4(n); // expected-error {{no viable conversion}}
const bool &direct5(b);
const bool &direct6(n);
const int &direct7(b);
const int &direct8(n); // expected-error {{no viable conversion}}
bool directList1{b};
bool directList2{n};
int directList3{b};
int directList4{n}; // expected-error {{no viable conversion}}
const bool &directList5{b};
const bool &directList6{n};
const int &directList7{b};
const int &directList8{n}; // expected-error {{no viable conversion}}
bool copy1 = b;
bool copy2 = n; // expected-error {{no viable conversion}}
int copy3 = b;
int copy4 = n; // expected-error {{no viable conversion}}
const bool &copy5 = b;
const bool &copy6 = n; // expected-error {{no viable conversion}}
const int &copy7 = b;
const int &copy8 = n; // expected-error {{no viable conversion}}
bool copyList1 = {b};
bool copyList2 = {n}; // expected-error {{no viable conversion}}
int copyList3 = {b};
int copyList4 = {n}; // expected-error {{no viable conversion}}
const bool &copyList5 = {b};
const bool &copyList6 = {n}; // expected-error {{no viable conversion}}
const int &copyList7 = {b};
const int &copyList8 = {n}; // expected-error {{no viable conversion}}
}
#if __cplusplus < 201707L
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'}}
}
#endif
void testDelete()
{
// 5.3.5pp2:
struct Ptr {
operator int*();
};
struct NotPtr {
explicit operator int*(); // expected-note {{conversion}}
};
Ptr p;
NotPtr np;
delete p;
delete np; // expected-error {{converting delete expression from type 'NotPtr' to type 'int *' invokes an explicit conversion function}}
}
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}}
}
}
namespace pr8264 {
struct Test {
explicit explicit Test(int x); // expected-warning{{duplicate 'explicit' declaration specifier}}
};
}
namespace PR18777 {
struct S { explicit operator bool() const; } s;
int *p = new int(s); // expected-error {{no viable conversion}}
}