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// { dg-do compile { target c++17 } }
#include <variant>
void
test01()
{
struct X {
~X() { } // non-trivial
};
std::variant<const int, const X> v;
auto vv = v;
}
#if __cpp_lib_variant >= 202106L // P2231R1 constexpr destruction in variant
constexpr bool
test02()
{
struct Y {
constexpr ~Y() { } // non-trivial
};
using V = std::variant<int, const int, const Y, Y>;
V v1(std::in_place_index<1>, 1);
V vv1 = v1;
if (vv1.index() != v1.index())
return false;
V v2(std::in_place_index<2>);
V vv2 = v2;
if (vv2.index() != v2.index())
return false;
return true;
}
static_assert( test02() );
constexpr bool
test03()
{
struct Y {
constexpr ~Y() { } // non-trivial
};
using V = std::variant<int, int, Y, Y>;
V v1(std::in_place_index<1>, 1);
V vv1 = v1;
if (vv1.index() != v1.index())
return false;
vv1 = v1;
if (vv1.index() != v1.index())
return false;
vv1 = std::move(v1);
if (vv1.index() != v1.index())
return false;
V v2(std::in_place_index<2>);
V vv2 = v2;
if (vv2.index() != v2.index())
return false;
vv2 = v2;
if (vv2.index() != v2.index())
return false;
vv2 = std::move(v2);
if (vv2.index() != v2.index())
return false;
return true;
}
static_assert( test03() );
#endif
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