I think it's a good idea to attempt to express these ideas using existing syntax and see what that might look like.
So, for a bit of fun, I wrote this: https://gist.github.com/zenparsing/9ff3036b6eb15fa436e4 Basically, there's a Maybe function which returns a proxy over a target, and returns Maybes for calls and gets. Then there's a Definitely function that unwraps the Maybe (unwrapping Nothing to undefined of course). let scriptParent = Definitely(Maybe(window).document.scripts[0].parentNode); If you wanted syntactic sugar for this kind of thing, you'd probably want postfix operators to replace the Maybe and Definitely function calls. Swift does something similar with "?" and "!": https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/OptionalChaining.html This is kind of a generic monad pattern though, so it would be cool if the syntax could be applied to other monad-ish things.
_______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
