include <utility> header

nixiz · nixiz · commit 7b1e47ee1a61 · 2020-09-11T14:52:03.000+03:00
diff --git a/include/tracked/tracked_detail.hpp b/include/tracked/tracked_detail.hpp
@@ -1,5 +1,6 @@
 #pragma once
 #include <type_traits>
+#include <utility>
 
 namespace dtl {
   // tag type for value-initializing first, constructing second from remaining args
