diff options
| -rw-r--r-- | lib/persistence.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/persistence.h b/lib/persistence.h index d38d4b1..cc2e4e5 100644 --- a/lib/persistence.h +++ b/lib/persistence.h @@ -6,6 +6,7 @@ #include <iosfwd> #include <map> #include <memory> +#include <optional> #include <span> #include <special_members.hpp> #include <sstream> @@ -147,6 +148,10 @@ namespace Persistence { } }; + template<typename T> struct SelectionT<std::optional<T>> : public SelectionT<T> { + explicit SelectionT(std::optional<T> & value) : SelectionT<T> {value.emplace()} { } + }; + struct Persistable; struct PersistenceStore { using SelectionFactory = std::function<SelectionPtr()>; |