{ var text = "" var fontSize = 12 } class ProductModel { var name = "kalupas" } let model = ProductModel() let label = Label() bind(model, \.name, to: label, \.text)
{ var text = "" var fontSize = 12 } class ProductModel { var name = "kalupas" } let model = ProductModel() let label = Label() bind(model, \.name, to: label, \.text) • ӳจͷΑ͏ʹಡΊΔ • Bind model name to label text • getter, setter Λ؆ܿʹهड़Ͱ͖Δ • \.name = KeyPath (getter) • \.text = ReferenceWritableKeyPath (getterɾsetter)
authenticated(accessToken: String) case unauthenticated } let authentication = Authentication.authenticated( accessToken: "cafebeef" ) if case let .authenticated(accessToken) = authentication { // use accessToken }
authenticated(accessToken: String) case unauthenticated } let authentication = Authentication.authenticated( accessToken: "cafebeef" ) if case let .authenticated(accessToken) = authentication { // use accessToken }
authenticated(accessToken: String) case unauthenticated } let authentication = (/Authentication.authenticated).embed(“cafebeef") if case let .authenticated(accessToken) = authentication { // use accessToken }
authenticated(accessToken: String) case unauthenticated } let authentication = (/Authentication.authenticated).embed(“cafebeef") // if case let .authenticated(accessToken) = authentication { // // use accessToken // } (/Authentication.authenticated).extract(from: authentication)
x: ಄ࣙ • in fi x: தࣙ • post fi x (ඌࣙ) ͋Δ͕ɺͦΕར༻͞Ε͍ͯͳ͍ͷͰׂѪ • pre fi x operator ͷྫ • Key Paths ʹ͓͚Δʮ\User.idʯɺBoolean ͷసʮ!isPresentedʯͳͲ • in fi x operator ͷྫ • ʮ1 + 2ʯʮ2 - 1ʯͳͲ • operator ࣗ࡞͢Δ͜ͱ͕Ͱ͖Δ 49
Paths ͱ͍͏ϥΠϒϥϦ͕ Point-Free ʹΑͬͯ ఏڙ͞Ε͍ͯΔ • Case Paths ʹ༷ʑͳར༻γʔϯ͕͋Δ • map ͳͲͷߴ֊ؔͰͷར༻ɺfunction ͷҾͱͯ͠ಛఆͷ case Λ׆༻͍ͨ͠߹ͳͲ • Case Paths ͷ࣮ͰҎԼͷΑ͏ͳٕज़͕ར༻͞Ε͍ͯΔ • pre fi x, in fi x operator • @_disfavoredOverload • Mirror (ࠓར༻͞Ε͍ͯͳ͍) • Pointer • Case Paths ͔ͬ͠Γςετ͞Ε͍ͯͯར༻࣮͋ΓɺݴޠػೳʹΈࠐΉͷͨΊͷಈ͖ൃੜ͍ͯ͠Δ