Niall, Are Boost.Outcome monads intended to work with references (at least lvalue references)? If I try to compile the following program that tries to use an `result<T&>` (on GCC 6.3.1): ``` #include <boost/outcome.hpp> namespace out = BOOST_OUTCOME_V1_NAMESPACE; int g_count = 0; out::result<int&> get_ref() { return out::result<int&>(g_count); } int main () {} ``` I get lots of compiler errors. But the messages ("constructor cannot be overloaded") indicate that it was just an omission and not a design decision. If I try it with `outcome::expected` I also get these messages, but I also get a static assert saying that as per LWG decision T must be default constructible. Vicente, does this mean you cannot use `std::expected` to return references? Regards, &rzej;