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
33
|
// Copyright 2021 Peter Dimov.
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/variant2/variant.hpp>
using namespace boost::variant2;
template<class... T> class X: variant<T...>
{
using base = variant<T...>;
using base::base;
};
struct Y
{
Y( Y const& rhs ) = default;
template<class T> Y( T const& t )
{
t.bar();
}
};
int main()
{
using W = X<int, double, Y>;
W a( 1 );
W b( a );
(void)b;
}
|
