mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-04 16:50:57 +00:00
23 lines
425 B
C++
23 lines
425 B
C++
|
// { dg-options "-std=gnu++17" }
|
||
|
|
// { dg-do compile }
|
||
|
|
|
||
|
|
#include <optional>
|
||
|
|
|
||
|
|
using pair_t = std::pair<int, int>;
|
||
|
|
using opt_t = std::optional<pair_t>;
|
||
|
|
|
||
|
|
static_assert(std::is_copy_constructible_v<opt_t::value_type>);
|
||
|
|
static_assert(std::is_copy_assignable_v<opt_t::value_type>);
|
||
|
|
|
||
|
|
static_assert(std::is_copy_assignable_v<opt_t>); // assertion fails.
|
||
|
|
|
||
|
|
class A
|
||
|
|
{
|
||
|
|
void f(const opt_t& opt)
|
||
|
|
{
|
||
|
|
_opt = opt;
|
||
|
|
}
|
||
|
|
|
||
|
|
opt_t _opt;
|
||
|
|
};
|