add missing is_ostreamable

timblechmann · rollbear · commit b94b843c1d65 · 2022-10-20T14:44:09.000+02:00
diff --git a/include/strong_type/strong_type.hpp b/include/strong_type/strong_type.hpp
@@ -571,6 +571,9 @@ struct ostreamable
   };
 };
 
+template<typename T>
+using is_ostreamable = std::is_base_of<ostreamable::modifier<T>, T>;
+
 struct istreamable
 {
   template <typename T>

Original file line number	Diff line number	Diff line change
`@@ -571,6 +571,9 @@ struct ostreamable`
`571`	`571`	`};`
`572`	`572`	`};`
`573`	`573`
	`574`	`+template<typename T>`
	`575`	`+using is_ostreamable = std::is_base_of<ostreamable::modifier<T>, T>;`
	`576`	`+`
`574`	`577`	`struct istreamable`
`575`	`578`	`{`
`576`	`579`	`template <typename T>`