692 typedef expected<ConstructorTracker, int> exp_track;  typedef
697   exp_track e("hello");  in TEST()
706   exp_track e2 = e;  in TEST()
715   exp_track e3 = std::move(e);  in TEST()
725   exp_track e4(ct);  in TEST()
735   exp_track e5(std::move(ct2));  in TEST()
744   exp_track e6 = "hello";  in TEST()
745   exp_track e7 = "world";  in TEST()
755   exp_track e8 = "hello";  in TEST()
756   exp_track e9 = "world";  in TEST()
766   exp_track e10 = "hello";  in TEST()
767   exp_track e11 = "world";  in TEST()
847   auto test = [](const std::string& in) -> exp_track {  in TEST()