Re: [boost] [outcome] Possible extensions/changes to std::experimental::expected

Outcome uses a different mitigation by restricting the possible types of E, rendering the above case very unlikely (although not impossible, since outcome is legal).

A static assert should prevent construction with a T convertible to or from an error_code_extended or a std::exception_ptr. As error_code_extended explicitly constructs from error_code, outcome should not compile. Niall -- ned Productions Limited Consulting http://www.nedproductions.biz/ http://ie.linkedin.com/in/nialldouglas/