Using an actual Monad trait is possible now

[Boscop]

Would you be interested in switching this crate over to the new Monad trait that is possible? https://gist.github.com/edmundsmith/855fcf0cb35dd467c29a9350481f0ecf#gistcomment-3546962

[TeXitoi]

You can fork and experiment, but it will not be official as this crate run on stable.

Also, with ? Supported by option, and normal iterator chain, this crate is not so useful, and not really idiomatic, so I don't recommend using it for readability reason on production code.