Cartfile pins dependencies to SHA.
After carthage update on Stream, Cartfile.resolved is following:

github "robrix/Box" "18d05a56845837eea90a36854c67de2520983bf8"
github "robrix/Prelude" "180e9ae5e60ec47abd8f3e0fa68cafbbbd160abe"
github "robrix/Memo" "1.1.4"
github "robrix/Either" "1.2.1"

I'v noticed by fails on building Prelude on building Either on building Stream.
Thanks

Per discussion on a commit.

Maps .Right instances to a new type, leaves .Left ones alone.

let result: Either<T, U> = …
return result.map(const(Int)) // => Either<T, Int>

Are free versions of flatMap and map something you'd be interested in merging?

I think Prelude's version should be fixed instead of using master. This is causing issue when resolving Cartfile into Cartfile.resolved we other dependencies that use Prelude.

I tried to use Either in a combined Mac/iOS library I'm developing, but looks like this project is only configured for Mac targets. Any reason not to add iOS as well?

Would it be possible to keep the Cocoapods podspec up to date, and to push the newest version of Either to the Cocoapods master repo? I realize there's a naming conflict with this project.

pod 'Either', :git => "https://github.com/robrix/Either", :tag => '2.0.0'

is fine. Just thought I'd ask!

Adding github "robrix/Either" to my project's Cartfile and running carthage update produces the following error message:

$ carthage update
*** Cloning Either
No available version for github "robrix/Either" satisfies the requirement:
$ |

I suppose it's because Either has no versioned commit tag (or "release") yet?

We’ve added left and right properties and >>- since the last tag.