1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
// P0892R2
// { dg-do compile }
// { dg-options "-std=c++2a" }
#include <type_traits>
class A {};
class B : public A {};
class C {};
class D { public: operator C() { return c; } C c; };
template <typename T1, typename T2>
struct S {
explicit(!std::is_convertible_v<T1, T2>)
S(T1, T2) { }
};
void
foo ()
{
A a;
B b;
C c;
D d;
S<int, int> s{ 1, 2 };
S<int, int> s2 = { 1, 2 };
S<B*, A*> s3 = { &b, &a };
S<A*, B*> s4 = { &a, &b }; // { dg-error "converting" }
S<B*, C*> s5 = { &b, &c }; // { dg-error "converting" }
S<D, C> s6 = { d, c };
}
|
