| // { dg-require-effective-target c++17 } | |
| // { dg-options "-Og -Wall" } | |
| #include <optional> | |
| #include <memory> | |
| struct A { | |
| A (int a) : a {a} | |
| {} | |
| const std::shared_ptr <int> x; | |
| int a; | |
| }; | |
| class B | |
| { | |
| public: | |
| B (const std::optional <A>& a) | |
| : a {a} | |
| { | |
| } | |
| public: | |
| const std::optional <A> a; | |
| }; | |
| int | |
| main () | |
| { | |
| B b {std::nullopt}; | |
| } |