Groundwork for running different applications

2019-12-14 23:57:04 +01:00
parent 5541f9dca8
commit d17f37db12
8 changed files with 256 additions and 15 deletions
@@ -93,6 +93,14 @@ struct __false_v<T, std::enable_if_t<std::is_same_v<T, bool>>> {
 template<class T>
 static constexpr auto false_v = __false_v<T>::value;

+template<class T>
+using optional_t = either_t<
+  (std::is_same_v<T, bool> ||
+   instantiation_of_v<std::unique_ptr, T> ||
+   instantiation_of_v<std::shared_ptr, T> ||
+   std::is_pointer_v<T>),
+  T, std::optional<T>>;
+
 template<class T>
 class FailGuard {
 public: