On 25/05/2017 18:33, Andrzej Krzemienski via Boost wrote:
Niall, Are Boost.Outcome monads intended to work with references (at least lvalue references)?
The current code no. And I deliberately left out a static assert until feedback came from here.
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.
I did leave my options open just in case. But more support code would be needed.
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?
Neither std::variant nor std::optional support references, and neither
does std::expected in its current proposal.
Unless reviewers here are super keen on supporting outcome