CasePaths-Extensions

Some simple CasePaths extensions.

matches

Useful to use in if conditions:

let state = Authentication.authenticated(accessToken: "123")

if (/Authentication.unauthenticated).matches(state) {
    print("unauthenticated")
} else {
    print("you're in!")
}

map

As with Optional.map it transforms a value only if the enum is of the expected case.

let userIn = Authentication.authenticated(accessToken: "123")
let userOut = Authentication.unauthenticated

(/Authentication.authenticated).map(userIn, { $0.count }) // 3
((/Authentication.authenticated).map(userOut, { $0.count }) // nil

mutate

Similar to map but instead of returning any new type, it returns a new enum with a transformed value, only if the enum case matches.

(/Authentication.authenticated).mutate(userIn, { ">>\($0)<<" })
// returns Authentication.authenticated(accessToken: ">>123<<")

Author

Alejandro Martinez | http://alejandromp.com | @alexito4