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όϦσʔγϣϯ෇͖ϑΥʔϜΛ એݴతʹ࣮૷͢Δ 2024/5/31(Fri) Mobile Act OSAKA 13

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αϯϓϧίʔυ IUUQTHJUIVCDPNTUVEJPSPPLFSZ7BMJEBUJPO'PSN4BNQMF

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ͱ͋ΔϓϩδΣΫτʹͯ

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Α͋͘ΔϑΥʔϜը໘

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Α͋͘ΔϑΥʔϜը໘ ̍ʙจࣈҎ಺ બ୒ඞਢ ̍ʙจࣈҎ಺ ৗʹԡͤΔ

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Α͋͘ΔϑΥʔϜը໘ ৚݅Λຬ͍ͨͯ͠ͳ͍ঢ়ଶͰԡ͢ͱ

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Α͋͘ΔϑΥʔϜը໘ Τϥʔঢ়ଶʹͳΓ Τϥʔϝοηʔδ͕දࣔ͞ΕΔ

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Α͋͘ΔϑΥʔϜը໘ ஋Λม͑Δͱ࿮͸ফ͑ͯ Τϥʔϝοηʔδ͚͕ͩ࢒Δ

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Α͋͘ΔϑΥʔϜը໘ ৚݅Λຬ͍ͨͯ͠Δঢ়ଶͰԡ͢ͱ

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Α͋͘ΔϑΥʔϜը໘ Τϥʔ͕ফ͑Δ

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ॴײ w ಛผ೉͘͠͸ͳ͍ w Ͱ΋ͪΐͬͱ໘౗ w Ϣʔβʔʹͱͬͯ͸࢖͍΍ͦ͢͏

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Ұͭେ͖ͳ໰୊͕ʂ

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͜͏͍͏ը໘PSίϯϙʔωϯτ͕ dը໘΄Ͳ͋Δ ͔ͳΓେ͖ΊͷϓϩδΣΫτͰͨ͠

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۪௚ʹ࣮૷͢Δͱʜ w ਓʹΑ࣮ͬͯ૷ʹ͹Β͖͕ͭੜͦ͡͏ w ΋ͬͱ೉͍͠ը໘͕ଞʹ΋͋ΔͷͰ͜͜Ͱۤ࿑ͯ͠Δ৔߹Ͱ͸ͳ͍

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্ख͍΍ΓํΛߟ͑Ͷ͹ʂ

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ຊൃදͷ಺༰ w ࣅͨΑ͏ͳը໘Λେྔʹ࡞ΔࡍͷઃܭΛͲ͏ߟ͔͑ͨ

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ཧ૝ͷܗΛߟ͑Δ w ਓʹΑ࣮ͬͯ૷͕όϥόϥʹͳΔͷ͸ආ͚͍ͨ w ͱ͸͍͑࠷ॳ͔Βཧ૝ͷܗΛ࡞Δͷ͸೉͍͠ w ͳͷͰҰ୴۪௚ʹ࣮૷ͯ͠Έͯஈ֊తʹվળ͍ͯ͘͠

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લఏ৚݅ w 4XJGU6*Ͱ͢ w J04 Λର৅ͱ͍ͯ͠·ͨ͠ʢ౰࣌ʣ w "OESPJE൛͸ଘࡏ͠·ͤΜ

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͜ΕʹόϦσʔγϣϯॲཧΛ଍͍ͯ͘͠ struct RegisterView: View { @State var id = "" @State var password = "" @State var favoriteFruit: Fruit? var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) MyTextField(name: "PW", text: $password) FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) Button("ొ࿥") { } .buttonStyle(.myButtonStyle) } .padding() } } }

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·ͣ͸ঢ়ଶ͔Βߟ͑Δ struct RegisterView: View { @State var id = "" @State var password = "" @State var favoriteFruit: Fruit? var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) MyTextField(name: "PW", text: $password) FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) Button("ొ࿥") { } .buttonStyle(.myButtonStyle) } .padding() } } }

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͓͞Β͍ w Τϥʔ͕ൃੜ͢Δͱ੺࿮ ΤϥʔϝοηʔδΛදࣔ w ஋͕มΘΔͱ੺࿮͚ͩফ͑Δ

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͜Ε͕ @State var id = “"

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͜͏ͳΔ @State var id = “" @State var idErrorMessage: String? @State var isIDErrorActive = false

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͜͏ͳΔ @State var id = “" @State var idErrorMessage: String? @State var isIDErrorActive = false Τϥʔϝοηʔδͷ༗ແΛද͢ OJMͳΒΤϥʔϝοηʔδͳ͠ TPNFͳΒΤϥʔϝοηʔδ͋Γ

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͜͏ͳΔ @State var id = “" @State var idErrorMessage: String? @State var isIDErrorActive = false ࿮ઢͷ༗ແΛද͢

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͜͏ͳΔ @State var id = “" @State var idErrorMessage: String? @State var isIDErrorActive = false ϑΟʔϧυʹ͖ͭม਺͕ඞཁʂ

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ͭ·Γ͜Ε͕ @State var id = "" @State var password = "" @State var favoriteFruit: Fruit?

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͜͏ͳΔ @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false

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͜͏ͳΔ @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false ͢Ͱʹେมͦ͏͚ͩͲ ·ͣ͸۪௚ʹ࡞ΔͷͰ͜ΕͰਐΊΔ

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࣍͸όϦσʔγϣϯͷॲཧ

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func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } }

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func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } Τϥʔͷঢ়ଶΛϦηοτ

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func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } όϦσʔγϣϯΛύε͠ͳ͚Ε͹Τϥʔঢ়ଶʹ͢Δ

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func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } શ෦ύε͚ͨ࣌ͩ͠"1*Λ౤͛Δ

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࣍͸஋͕มΘͬͨ࣌ʹ Τϥʔͷ࿮ΛऔΓআ͘ॲཧ

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͜ΕΛ @State var id = ""

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͜͏͢Δ @State var id = "" { didSet { isIDErrorActive = false } }

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࢒೦Ͱ͕͢ !4UBUFͷEJE4FU͸ಈ͖·ͤΜ

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PO$IBOHFΛ࢖͏

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͜Ε͕ MyTextField(name: "ID", text: $id) MyTextField(name: "PW", text: $password) FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit)

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͜͏ͳΔ MyTextField(name: "ID", text: $id) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false }

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͋ͱ͸Τϥʔͷ6*Λදࣔ͢Δ ͚ͩ

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.PEJ fi FSʹΤϥʔঢ়ଶΛ౉͚ͩ͢ MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } ৄࡉ͸ׂѪ

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ؾʹͳΔͱ͜ΖͩΒ͚͕ͩ ͱΓ͋͑ͣͰ͖ͨ

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struct RegisterView: View { @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } Button("ొ࿥") { register() } .buttonStyle(.myButtonStyle) } .padding() } } func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } }

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w ποίϛͲ͜Ζ͸͋Δ͕ϑΥʔϜܥͷը໘͕ ը໘͙Β͍ͳΒେ͖ͳ໰ ୊ʹ͸ͳΒͳͦ͞͏ w ͔͠͠ࠓճ͸ͱʹ͔͘਺͕ଟ͍ͷͰ਺͕ଟ͘ͳͬͯ΋͍͍Α͏ʹؤுΔ

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ؾʹͳΔϙΠϯτ ʮ7JFXʹϕλ͕͖͍ͯ͠Δʯ

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struct RegisterView_ver1: View { @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } Button("ొ࿥") { register() } .buttonStyle(.myButtonStyle) } .padding() } } func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } } !4UBUFଟ͗͢  !4UBUFΛ࢖͍ͬͯΔͱςετॻ͚ͳ͍

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struct RegisterView_ver1: View { @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } Button("ొ࿥") { register() } .buttonStyle(.myButtonStyle) } .padding() } } func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } } ϨΠΞ΢τͷίʔυͱൺ΂Δͱ όϦσʔγϣϯॲཧ௕͗͢

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͜ͷ఺͸7JFXʹॻ͔ͳ͍ͱ ͍͚ͳ͍ॲཧͰ͸ͳ͍

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.PEFM΁Ҡಈ͢Δ

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TUSVDUΛ༻ҙ struct RegisterForm { } struct RegisterView: View { @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } Button("ొ࿥") { register() } .buttonStyle(.myButtonStyle) } .padding() } } func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } }

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͜ͷ෦෼Λ struct RegisterForm { } struct RegisterView_ver1: View { @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } Button("ొ࿥") { register() } .buttonStyle(.myButtonStyle) } .padding() } } func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } }

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Ҡಈ struct RegisterForm { @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false } struct RegisterView_ver1: View { var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } Button("ొ࿥") { register() } .buttonStyle(.myButtonStyle) } .padding() } } func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } }

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͜ͷ෦෼Λ struct RegisterForm { @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false } struct RegisterView_ver1: View { var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } Button("ొ࿥") { register() } .buttonStyle(.myButtonStyle) } .padding() } } func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } }

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Ҡಈ struct RegisterForm { @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false func register() -> RegisterRequest? { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request } } struct RegisterView_ver1: View { var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } Button("ొ࿥") { register() } .buttonStyle(.myButtonStyle) } .padding() } } func register() { Task { await API.send(request) } } }

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!4UBUF͸ෆཁ struct RegisterForm { @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false } struct RegisterForm { var id = "" var idErrorMessage: String? var isIDErrorActive = false var password = "" var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false }

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EJE4FU͕࢖͑ΔΑ͏ʹͳͬͨ struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } } struct RegisterForm { var id = "" var idErrorMessage: String? var isIDErrorActive = false var password = "" var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false }

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EJE4FU͕࢖͑ΔΑ͏ʹͳͬͨ MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorM MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: pa FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessag

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ͭ·Γ͜Ε͕ struct RegisterView: View { @State var id = "" @State var idErrorMessage: String? @State var isIDErrorActive = false @State var password = "" @State var passwordErrorMessage: String? @State var isPasswordErrorActive = false @State var favoriteFruit: Fruit? @State var favoriteFruitErrorMessage: String? @State var isFavoriteFruitErrorActive = false var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $id) .errorStyled(isActive: isIDErrorActive, errorMessage: idErrorMessage) .onChange(of: id) { _ in isIDErrorActive = false } MyTextField(name: "PW", text: $password) .errorStyled(isActive: isPasswordErrorActive, errorMessage: passwordErrorMessage) .onChange(of: password) { _ in isPasswordErrorActive = false } FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $favoriteFruit) .errorStyled(isActive: isFavoriteFruitErrorActive, errorMessage: favoriteFruitErrorMessage) .onChange(of: favoriteFruit) { _ in isFavoriteFruitErrorActive = false } Button("ొ࿥") { register() } .buttonStyle(.myButtonStyle) } .padding() } } func register() { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) Task { await API.send(request) } } }

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ϑΝΠϧʹ෼ׂ struct RegisterView: View { @State var form = RegisterForm() var body: some View { ScrollView { VStack(spacing: 16) { MyTextField(name: "ID", text: $form.id) .errorStyled(isActive: form.isIDErrorActive, errorMessage: form.idErrorMessage) MyTextField(name: "PW", text: $form.password) .errorStyled(isActive: form.isPasswordErrorActive, errorMessage: form.passwordErrorMessage) FruitPicker(name: "޷͖ͳϑϧʔπ", selection: $form.favoriteFruit) .errorStyled(isActive: form.isFavoriteFruitErrorActive, errorMessage: form.favoriteFruitErrorMessage) Button("ొ࿥") { register() } .buttonStyle(.myButtonStyle) } .padding() } } func register() { guard let request = form.validate() else { return } Task { await API.send(request) } } } struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false mutating func validate() -> RegisterRequest? { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request } }

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ঢ়ଶͱϩδοΫΛTUSVDU΁੾Γग़ͨ͠ w 4XJGU6*ͷ౎߹ʹҾͬுΒΕͳ͘ͳͬͨ w EJE4FU͕࢖͑ΔΑ͏ʹͳͬͨ w ςετͰ͖ΔΑ͏ʹͳͬͨ w 7JFXͷϑΝΠϧ͸6*ͷ͜ͱ͚ͩʹूத͢Ε͹ྑ͘ͳͬͨ w ϑΝΠϧʹ෼͔Εͨ͜ͱʹΑͬͯݟ௨͠͸গ͠μ΢ϯʁ w ྫ͕؆୯ͳͷͰϝϦοτײ͡ʹ͍͔͘΋Ͱ͕࣮͢ࡍ͸ೖྗ߲໨਺͸΋ͬͱଟ ͍ͷͰײ͡ํมΘΓͦ͏

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ؾʹͳΔϙΠϯτ ʮϑΟʔϧυ͝ͱʹม਺ඞཁʯ

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struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false }

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struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false } ࣅͨΑ͏ͳॲཧ

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struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false } ࣅͨΑ͏ͳίʔυॻ͘ͷ͕໘౗

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struct RegisterForm { mutating func validate() -> RegisterRequest? { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request } } ࣅͨΑ͏ͳॲཧ௕͍

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δΣωϦΫεΛ࢖ͬͯͭͷ TUSVDUʹ·ͱΊΔ

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δΣωϦοΫͳTUSVDUͰඞཁͳม਺Λ·ͱΊΔ struct Field { var wrappedValue: Value var isErrorActive = false var errorMessage: String? }

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δΣωϦοΫͳTUSVDUͰඞཁͳม਺Λ·ͱΊΔ struct Field { var wrappedValue: Value var isErrorActive = false var errorMessage: String? } struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false }

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δΣωϦοΫͳTUSVDUͰඞཁͳม਺Λ·ͱΊΔ struct Field { var wrappedValue: Value var isErrorActive = false var errorMessage: String? } struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false }

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δΣωϦοΫͳTUSVDUͰඞཁͳม਺Λ·ͱΊΔ struct Field { var wrappedValue: Value var isErrorActive = false var errorMessage: String? } struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false }

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δΣωϦοΫͳTUSVDUͰඞཁͳม਺Λ·ͱΊΔ struct Field { var wrappedValue: Value { didSet { guard wrappedValue != oldValue else { return } isErrorActive = false } } var isErrorActive = false var errorMessage: String? } struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false }

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ͳͷͰ͜Ε͕ struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false }

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͜͏ͳΔ struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false } struct RegisterForm { var id: Field = .init(wrappedValue: “") var password: Field = .init(wrappedValue: "") var favoriteFruit: Field = .init(wrappedValue: nil) }

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͜͏ͳΔ struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false } struct RegisterForm { var id: Field = .init(wrappedValue: “") var password: Field = .init(wrappedValue: "") var favoriteFruit: Field = .init(wrappedValue: nil) }

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ͱ͜ΖͰʜ

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͜Ε1SPQFSUZ8SBQQFSʹͰ͖Δ΍Μʂ @propertyWrapper struct Field { var wrappedValue: Value { didSet { guard wrappedValue != oldValue else { return } isErrorActive = false } } var isErrorActive = false var errorMessage: String? }

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ͳͷͰ͜Ε͕ struct RegisterForm { var id: Field = .init(wrappedValue: "") var password: Field = .init(wrappedValue: "") var favoriteFruit: Field = .init(wrappedValue: nil) }

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͜͏ͳΔ struct RegisterForm { var id: Field = .init(wrappedValue: "") var password: Field = .init(wrappedValue: "") var favoriteFruit: Field = .init(wrappedValue: nil) } struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? }

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͜Ε΋εοΩϦͤ͞Δ mutating func validate() -> RegisterRequest? { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false … }

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͜Ε΋εοΩϦͤ͞Δ @propertyWrapper struct Field { … mutating func clearError() { isErrorActive = false errorMessage = nil } var projectedValue: Field { get { self } set { self = newValue } } } mutating func validate() -> RegisterRequest? { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false … }

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͜Ε΋εοΩϦͤ͞Δ @propertyWrapper struct Field { … mutating func clearError() { isErrorActive = false errorMessage = nil } var projectedValue: Field { get { self } set { self = newValue } } } mutating func validate() -> RegisterRequest? { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false … }

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͜Ε΋εοΩϦͤ͞Δ mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() … } @propertyWrapper struct Field { … mutating func clearError() { isErrorActive = false errorMessage = nil } var projectedValue: Field { get { self } set { self = newValue } } }

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mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() … } ͜Ε΋εοΩϦͤ͞Δ @propertyWrapper struct Field { … mutating func clearError() { isErrorActive = false errorMessage = nil } var projectedValue: Field { get { self } set { self = newValue } } }

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εοΩϦͨ͠ mutating func validate() -> RegisterRequest? { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false … } mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() … }

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struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false mutating func validate() -> RegisterRequest? { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request } } struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request } }

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ؾʹͳΔϙΠϯτ ʮόϦσʔγϣϯॲཧ͕৑௕ʯ

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mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() if id.isEmpty || id.count > 20 { $id.errorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" $id.isErrorActive = true } if password.isEmpty || password.count > 20 { $password.errorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" $password.isErrorActive = true } if favoriteFruit == nil { $favoriteFruit.errorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" $favoriteFruit.isErrorActive = true } … } ΍͍ͬͯΔ͜ͱ͸ಉ͡ ৚݅ͱΤϥʔϝοηʔδ͕ҧ͏͚ͩ

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mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() if id.isEmpty || id.count > 20 { $id.errorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" $id.isErrorActive = true } if password.isEmpty || password.count > 20 { $password.errorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" $password.isErrorActive = true } if favoriteFruit == nil { $favoriteFruit.errorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" $favoriteFruit.isErrorActive = true } … } Ͱ͖Ε͹όϦσʔγϣϯ͕ύε͢Δ࣌ͷ৚݅Λॻ͖͍ͨ

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ͦ͏͍͏ϝιουΛ࡞Δ

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extension Field { mutating func validate(errorMessage: String, with validate: (Value) -> Bool) { if !validate(wrappedValue) { self.errorMessage = errorMessage isErrorActive = true } } }

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extension Field { mutating func validate(errorMessage: String, with validate: (Value) -> Bool) { if !validate(wrappedValue) { self.errorMessage = errorMessage isErrorActive = true } } } ৚݅ͱΤϥʔϝοηʔδΛҾ਺Ͱ౉͢

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extension Field { mutating func validate(errorMessage: String, with validate: (Value) -> Bool) { if !validate(wrappedValue) { self.errorMessage = errorMessage isErrorActive = true } } } όϦσʔγϣϯ͕௨Δ࣌ͷ৚݅ΛࢦఆͰ͖ΔΑ͏ʹͳͬͨ

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ͳͷͰ͜Ε͕ if id.isEmpty || id.count > 20 { $id.errorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" $id.isErrorActive = true } if password.isEmpty || password.count > 20 { $password.errorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" $password.isErrorActive = true } if favoriteFruit == nil { $favoriteFruit.errorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" $favoriteFruit.isErrorActive = true }

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͜͏ͳΔ $id.validate(errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } $password.validate(errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } $favoriteFruit.validate(errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞") { $0 != nil }

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͜͏ͳΔ $id.validate(errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } $password.validate(errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } $favoriteFruit.validate(errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞") { $0 != nil } όϦσʔγϣϯ͕ύε͢Δ৚݅Λࢦఆ͢Ε͹ྑ͍

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͜͏ͳΔ $id.validate(errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } $password.validate(errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } $favoriteFruit.validate(errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞") { $0 != nil } Τϥʔจݴͱ΋Ұக͢Δ

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struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request } } struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() $id.validate(errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } $password.validate(errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } $favoriteFruit.validateNotNil(errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞") if $id.isErrorActive || $password.isErrorActive || $favoriteFruit.isErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request } }

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ؾʹͳΔϙΠϯτ ʮڧ੍Ξϯϥοϓ͍ͯ͠Δʯ

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if $id.isErrorActive || $password.isErrorActive || $favoriteFruit.isErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request ͜Ε

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if $id.isErrorActive || $password.isErrorActive || $favoriteFruit.isErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request JGͰνΣοΫͯ͠Δ͔Β ͜ͷλΠϛϯάͰOJMʹͳΔ͜ͱ͸ͳ͍͸͕ͣͩ ҆શʹΞϯϥοϓ͍ͨ͠ͱ͜Ζ

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HVBSEMFUΛ࢖͏

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͜ΕΛ extension Field { mutating func validate(errorMessage: String, with validate: (Value) -> Bool) { if !validate(wrappedValue) { self.errorMessage = errorMessage isErrorActive = true } } }

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͜͏͢Δ mutating func validate(errorMessage: String, with validate: (Value) -> Bool) -> Value? { guard validate(wrappedValue) else { self.errorMessage = errorMessage isErrorActive = true return nil } return wrappedValue } ฦΓ஋Λ௥Ճ ύεͨ͠ΒTPNF /(ͳΒOJM Λฦ͢

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ͳͷͰ͜Ε͕ $id.validate(errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } $password.validate(errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } $favoriteFruit.validate(errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞") { $0 != nil } if $id.isErrorActive || $password.isErrorActive || $favoriteFruit.isErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request

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͜͏ͳͬͯ let idValue = $id.validate(errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } let passwordValue = $password.validate(errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } let favoriteFruitValue = $favoriteFruit.validateNotNil(errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞") if $id.isErrorActive || $password.isErrorActive || $favoriteFruit.isErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request

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͜͏ͳΔ let idValue = $id.validate(errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } let passwordValue = $password.validate(errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } let favoriteFruitValue = $favoriteFruit.validateNotNil(errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞") guard let idValue, let passwordValue, let favoriteFruitValue else { return nil } let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue ) return request

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͜͏ͳΔ let idValue = $id.validate(errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } let passwordValue = $password.validate(errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } let favoriteFruitValue = $favoriteFruit.validateNotNil(errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞") guard let idValue, let passwordValue, let favoriteFruitValue else { return nil } let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue ) return request ͕ফ͑ͨ

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ؾʹͳΔϙΠϯτ ʮόϦσʔγϣϯͷهड़Λָ͍ͨ͠ʯ

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let idValue = $id.validate(errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } let passwordValue = $password.validate(errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } จࣈ਺νΣοΫΛ͍ͯ͠Δ ৚݅͸େମಉ͡ͳͷͰ΋ͬͱָ͍ͨ͠

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͜͏ͨ͠Βָͦ͏ extension (String) -> Bool { static func count(isIn range: ClosedRange) -> Self { { value in range.contains(value.count) } } } let idValue = $id.validate( errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞", with: .count(isIn: 1 ... 20) ) ͜Μͳײ͡ʹॻ͖͍ͨ Λଧͭͱิ׬͕ग़ͯ͘ΔΑ͏ͳੈք

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͜͏ͨ͠Βָͦ͏ extension (String) -> Bool { static func count(isIn range: ClosedRange) -> Self { { value in range.contains(value.count) } } } let idValue = $id.validate( errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞", with: .count(isIn: 1 ... 20) ) Ҿ਺͸ΫϩʔδϟͳͷͰ&YUFOTJPOΛੜ΍ͤ͹͍͍ͷͰ͸ʁ

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Ͱ͖·ͤΜ extension (String) -> Bool { static func count(isIn range: ClosedRange) -> Self { { value in range.contains(value.count) } } } let idValue = $id.validate( errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞", with: .count(isIn: 1 ... 20) ) 💥/POOPNJOBMUZQF 4USJOH #PPMDBOOPUCFFYUFOEFE

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TUSVDUͰϥοϓ͢Δํ๏Λ࢖͏

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Ϋϩʔδϟ͚ͩͷTUSVDUΛ࡞੒ struct ValidationRule { let validate: (Value) -> Bool } ͭͷΫϩʔδϟΛ࣋ͭ ࣮࣭ΫϩʔδϟͰ͋Δ

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TUSVDUͳΒTUBUJDGVOD͕࢖͑Δ extension ValidationRule where Value == String { static func count(isIn range: ClosedRange) -> Self { .init { value in range.contains(value.count) } } }

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TUSVDUͳΒTUBUJDGVOD͕࢖͑Δ extension ValidationRule where Value == String { static func count(isIn range: ClosedRange) -> Self { .init { value in range.contains(value.count) } } }

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͜ΕΛ mutating func validate(errorMessage: String, with validate: (Value) -> Bool) -> Value? { guard validate(wrappedValue) else { self.errorMessage = errorMessage isErrorActive = true return nil } return wrappedValue }

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͜͏͢Δ mutating func validate(errorMessage: String, with rule: ValidationRule) -> Value? { guard rule.validate(wrappedValue) else { self.errorMessage = errorMessage isErrorActive = true return nil } return wrappedValue }

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ݟӫ͑ͷͨΊҾ਺ͷॱ൪Λม͑Δ mutating func validate(with rule: ValidationRule, errorMessage: String) -> Value? { guard rule.validate(wrappedValue) else { self.errorMessage = errorMessage isErrorActive = true return nil } return wrappedValue }

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ͳͷͰ͜Ε͕ let idValue = $id.validate(errorMessage: "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 } let passwordValue = $password.validate(errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞") { 1 <= $0.count && $0.count <= 20 }

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͜͏ͳΔ let idValue = $id.validate( with: .count(isIn: 1 ... 20), errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) let passwordValue = $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) ҙਤ͕఻ΘΓ΍͘͢ͳͬͨ ॻ͘ͱ͖΋ͱΓ͋͑ͣͱଧͯ͹Կ͔͠Βิ׬͞ΕΔ

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৚͕݅ෳ਺͋Δ৔߹͸ʁ

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ྫ͑͹ʮ൒֯ӳ਺ࣈͷΈͰdจࣈҎ಺ʯͷ৔߹ extension ValidationRule where Value == String { static func isOnlyAlphanumericAndCount(isIn range: ClosedRange) -> Self { .init { value in value.range(of: "[^a-zA-Z0-9]", options: .regularExpression) == nil && range.contains(value.count) } } }

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ྫ͑͹ʮ൒֯ӳ਺ࣈͷΈͰdจࣈҎ಺ʯͷ৔߹ extension ValidationRule where Value == String { static func isOnlyAlphanumericAndCount(isIn range: ClosedRange) -> Self { .init { value in value.range(of: "[^a-zA-Z0-9]", options: .regularExpression) == nil && range.contains(value.count) } } } จࣈ਺νΣοΫ ൒֯ӳ਺ࣈͷΈͷνΣοΫ ͍͍࣮ͪͪ૷͠ͳ͍ͱ͍͚ͳ͍ʜʁ

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Ͱ߹੒͍ͨ͠ let idValue = $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) ͜͏͍͏;͏ʹॻ͖͍ͨ

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ΫϩʔδϟΛ߹੒͢Δ struct ValidationRule { let validate: (Value) -> Bool static func && (_ lhs: Self, _ rhs: Self) -> Self { ValidationRule { value in lhs.validate(value) && rhs.validate(value) } } } ͭͷ7BMJEBUJPO3VMFΛड͚औΔ

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struct ValidationRule { let validate: (Value) -> Bool static func && (_ lhs: Self, _ rhs: Self) -> Self { ValidationRule { value in lhs.validate(value) && rhs.validate(value) } } } ಺෦తʹ྆ऀͷ݁ՌΛͰܨ͛Δ ΫϩʔδϟΛ߹੒͢Δ

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struct ValidationRule { let validate: (Value) -> Bool static func && (_ lhs: Self, _ rhs: Self) -> Self { ValidationRule { value in lhs.validate(value) && rhs.validate(value) } } } ͦͷॲཧΛ৽ͨͳ7BMJEBUJPO3VMFͰϥοϓ͢Δ ΫϩʔδϟΛ߹੒͢Δ

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Ͱ͖ͨ let idValue = $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) ಠࣗͷϧʔϧΛ౎౓ఆٛ͢Δඞཁ͕ͳ͘ͳΔ

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ݱ࣌఺ͷ3FHJTUFS'PSN

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struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() let idValue = $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) let passwordValue = $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) let favoriteFruitValue = $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) guard let idValue, let passwordValue, let favoriteFruitValue else { return nil } let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue ) return request } }

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struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() let idValue = $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) let passwordValue = $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) let favoriteFruitValue = $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) guard let idValue, let passwordValue, let favoriteFruitValue else { return nil } let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue ) return request } } Τϥʔͷঢ়ଶ͸!'JFMEʹؚ·Ε͍ͯΔ

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struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() let idValue = $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) let passwordValue = $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) let favoriteFruitValue = $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) guard let idValue, let passwordValue, let favoriteFruitValue else { return nil } let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue ) return request } } όϦσʔγϣϯͷ৚݅͸ ࠶ར༻݁߹Մೳ

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struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() let idValue = $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) let passwordValue = $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) let favoriteFruitValue = $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) guard let idValue, let passwordValue, let favoriteFruitValue else { return nil } let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue ) return request } } όϦσʔγϣϯ݁Ռ͸ ΦϓγϣφϧͰड͚औΔ

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struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() let idValue = $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) let passwordValue = $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) let favoriteFruitValue = $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) guard let idValue, let passwordValue, let favoriteFruitValue else { return nil } let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue ) return request } } શͯύε͚ͨ࣌ͩ͠ 3FHJTUFS3FRVFTUΛฦ͢

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࠷ॳͱݟൺ΂Δ struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? mutating func validate() -> RegisterRequest? { $id.clearError() $password.clearError() $favoriteFruit.clearError() let idValue = $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) let passwordValue = $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) let favoriteFruitValue = $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) guard let idValue, let passwordValue, let favoriteFruitValue else { return nil } let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue ) return request } } struct RegisterForm { var id = "" { didSet { guard id != oldValue else { return } isIDErrorActive = false } } var idErrorMessage: String? var isIDErrorActive = false var password = "" { didSet { guard password != oldValue else { return } isPasswordErrorActive = false } } var passwordErrorMessage: String? var isPasswordErrorActive = false var favoriteFruit: Fruit? { didSet { guard favoriteFruit != oldValue else { return } isFavoriteFruitErrorActive = false } } var favoriteFruitErrorMessage: String? var isFavoriteFruitErrorActive = false mutating func validate() -> RegisterRequest? { idErrorMessage = nil isIDErrorActive = false passwordErrorMessage = nil isPasswordErrorActive = false favoriteFruitErrorMessage = nil isFavoriteFruitErrorActive = false if id.isEmpty || id.count > 20 { idErrorMessage = "ID͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isIDErrorActive = true } if password.isEmpty || password.count > 20 { passwordErrorMessage = "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" isPasswordErrorActive = true } if favoriteFruit == nil { favoriteFruitErrorMessage = "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" isFavoriteFruitErrorActive = true } if isIDErrorActive || isPasswordErrorActive || isFavoriteFruitErrorActive { return nil } let request = RegisterRequest( id: id, password: password, favoriteFruit: favoriteFruit! ) return request } }

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Α͘ͳ͖ͬͯͨ

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΋͏গ͠೉͍͠ έʔεΛߟ͑ͯΈΔ

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ϓϩϑΟʔϧೖྗཝΛ௥Ճ

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ΦϑͳΒχοΫωʔϜͱ೥ྸ͸ ೖྗͰ͖ͳ͍

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Φϑͷ৔߹όϦσʔγϣϯ͢Δඞཁ͕ͳ͍ͷͰ Τϥʔʹ͸͠ͳ͍

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͔͠͠Φϯͷ৔߹͸ όϦσʔγϣϯͷର৅ͱͳΔ ৗʹόϦσʔγϣϯ͢ΔΘ͚Ͱ͸ͳ͘ ৚݅ʹԠͯ͢͡Δ͔͠ͳ͍͔Λม͑Δ

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͔͠͠Φϯͷ৔߹͸ όϦσʔγϣϯͷର৅ͱͳΔ ৗʹόϦσʔγϣϯ͢ΔΘ͚Ͱ͸ͳ͘ ৚݅ʹԠͯ͢͡Δ͔͠ͳ͍͔Λม͑Δ ͋Δબ୒ࢶΛબΜ͚ͩ࣌ͩ ௥ՃͷϑΟʔϧυ͕ొ৔͢Δ Έ͍ͨͳͷͬͯΑ͋͘ΔΑͶ

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۪௚ʹ࣮૷ͯ͠ΈΔ

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ϓϩύςΟΛ௥Ճ struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? var includesProfile = false @Field var nickName = "" @Field var age = "" } ϓϩϑΟʔϧΛؚΊΔ͔Ͳ͏͔ Τϥʔঢ়ଶʹ͸ͳΒͳ͍ͷͰ!'JFME͸ෆཁ

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struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? var includesProfile = false @Field var nickName = "" @Field var age = "" } χοΫωʔϜͱ೥ྸ ϓϩύςΟΛ௥Ճ

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όϦσʔγϣϯॲཧΛ௥Ճ let nickNameValue: String? = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" )

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όϦσʔγϣϯॲཧΛ௥Ճ let nickNameValue: String? = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) ͜ΕͰ͸ຖճόϦσʔγϣϯ͞Εͯ͠·͏

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όϦσʔγϣϯॲཧΛ௥Ճ let nickNameValue: String?? if includesProfile { nickNameValue = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) } else { nickNameValue = .some(nil) } ϓϩϑΟʔϧΛؚΊΔ͚࣌ͩόϦσʔγϣϯ͢Δ

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όϦσʔγϣϯॲཧΛ௥Ճ let nickNameValue: String?? if includesProfile { nickNameValue = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) } else { nickNameValue = .some(nil) } ೋॏΦϓγϣφϧʹͳ͍ͬͯΔ

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όϦσʔγϣϯॲཧΛ௥Ճ let nickNameValue: String?? if includesProfile { nickNameValue = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) } else { nickNameValue = .some(nil) } w ͜ͷม਺͕औΓ͏Δ஋͸ͭ w 4USJOH TPNF TPNF MFUWBMVF ʜϓϩϑΟʔϧೖྗΦϯͰόϦσʔγϣϯύεͨ࣌͠ w 4USJOH TPNF OJM ʜϓϩϑΟʔϧೖྗΦϑͷ࣌ w 4USJOH OJMʜόϦσʔγϣϯʹࣦഊͨ࣌͠ w ΍΍͍͜͠

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ϦΫΤετ૊Έཱͯॲཧ΋ݟͯΈΔ let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue, profile: includesProfile ? .init(nickName: nickNameValue!, age: ageValue!) : nil )

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ϦΫΤετ૊Έཱͯॲཧ let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue, profile: includesProfile ? .init(nickName: nickNameValue!, age: ageValue!) : nil ) ϓϩϑΟʔϧΛؚΊΔ͔Ͳ͏͔Ͱ஋Λม͑Δ

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ϦΫΤετ૊Έཱͯॲཧ let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue, profile: includesProfile ? .init(nickName: nickNameValue!, age: ageValue!) : nil ) ؚΊͳ͍ͳΒOJMΛઃఆ

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ϦΫΤετ૊Έཱͯॲཧ let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue, profile: includesProfile ? .init(nickName: nickNameValue!, age: ageValue!) : nil ) ؚΊΔͳΒ1SP fi MFϞσϧΛઃఆ͢Δ͕ʜ

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ϦΫΤετ૊Έཱͯॲཧ let request = RegisterRequest( id: idValue, password: passwordValue, favoriteFruit: favoriteFruitValue, profile: includesProfile ? .init(nickName: nickNameValue!, age: ageValue!) : nil ) ·ͨڧ੍Ξϯϥοϓ͕ग़͖ͯͨ

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όϦσʔγϣϯͨ͠Γ ͠ͳ͔ͬͨΓ͢Δͷ೉͍͠ ࣮ࡍͷϓϩδΣΫτͰ͸͜͏͍͏ͷ͕ଟ͔ͬͨΓ͢ΔͷͰख͸ൈ͚ͳ͍

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ͱΓ͋͑ͣೋॏΦϓγϣφϧΛ ͳΜͱ͔͠Α͏

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7BMJEBUJPO3FTVMUܕΛఆٛ enum ValidationResult { case success(Value) case failed } ࠓ·Ͱ͸खΛൈ͍ͯΤϥʔͳΒOJMͱ͍͕ͯͨ͠ ͦͷ͍ͤͰOJMͱͯ͠ѻ͍͍ͨ৔ॴͱͬͪ͝ΌʹͳΔ ͱ͍͏Θ͚Ͱઐ༻ͷܕΛ༻ҙ

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7BMJEBUJPO3FTVMUʹஔ͖׵͍͑ͯ͘ mutating func validate(with rule: ValidationRule, errorMessage: String) -> Value? { guard rule.validate(wrappedValue) else { self.errorMessage = errorMessage isErrorActive = true return nil } return wrappedValue }

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7BMJEBUJPO3FTVMUʹஔ͖׵͍͑ͯ͘ mutating func validate(with rule: ValidationRule, errorMessage: String) -> ValidationResult { guard rule.validate(wrappedValue) else { self.errorMessage = errorMessage isErrorActive = true return .failed } return .success(wrappedValue) }

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͜Ε͕ let nickNameValue: String??

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͜͏ͳΔ let nickNameValue: ValidationResult w ͜ͷม਺͕औΓ͏Δ஋͸ͭ w 7BMJEBUJPO3FTVMUTVDDFTT TPNF MFUWBMVF ʜϓϩϑΟʔϧೖྗΦϯͰόϦσʔγϣϯύεͨ࣌͠ w 7BMJEBUJPO3FTVMUTVDDFTT OJM ʜϓϩϑΟʔϧೖྗΦϑͷ࣌ w 7BMJEBUJPO3FTVMUGBJMFEʜόϦσʔγϣϯʹࣦഊͨ࣌͠ w Ϛγʹͳͬͨ

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Αͦ͞͏ʁ

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ͱࢥ͍͖΍ίϯύΠϧΤϥʔ💥

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ܕ͕߹Θͳ͘ͳΔ let nickNameValue: ValidationResult if includesProfile { nickNameValue = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) } else { nickNameValue = .success(nil) } ͜ͷϝιουͷฦΓ஋͸7BMJEBUJPO3FTVMU4USJOH ͔͠͠୅ೖઌͷม਺͸7BMJEBUJPO3FTVMU4USJOH  ܕ͕߹Θͳ͍ 💥Cannot assign value of type 'ValidationResult' to type 'ValidationResult'

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ܕ͕߹Θͳ͘ͳΔ let nickNameValue: ValidationResult if includesProfile { nickNameValue = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) .map(Optional.some) } else { nickNameValue = .success(nil) } 7BMJEBUJPO3FTVMUʹNBQؔ਺Λ࡞ͬͯܕΛ߹ΘͤΔ Τϥʔ͸ղফ͞Ε͕ͨΘ͔Γʹ͍͘

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ิ଍NBQͷ࣮૷ enum ValidationResult { case success(Value) case failed func map(_ transform: (Value) -> R) -> ValidationResult { switch self { case .success(let value): return .success(transform(value)) case .failed: return .failed } } }

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HVBSEMFU͕࢖͑ͳ͍ guard let idValue, let passwordValue, let favoriteFruitValue, let ageValue, let nickNameValue else { return nil } 💥Initializer for conditional binding must have Optional type, not 'ValidationResult' શͯ7BMJEBUJPO3FTVMUܕʢඇΦϓγϣφϧʣʹͳͬͨͷͰΤϥʔʹͳΔʢ౰વʣ

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HVBSEMFU͕࢖͑ͳ͍ guard let idValue, let passwordValue, let favoriteFruitValue, let ageValue, let nickNameValue else { return nil } DBTFʹมߋͯ͠ղܾ ղফ͕ͨ͠ɺͳΜ͔௕͍ guard case .success(let idValue) = idValue, case .success(let passwordValue) = passwordValue, case .success(let favoriteFruitValue) = favoriteFruitValue, case .success(let ageValue) = ageValue, case .success(let nickNameValue) = nickNameValue else { return nil }

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Ұ୴ݟฦͯ͠ΈΔ

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let nickNameValue: ValidationResult if includesProfile { nickNameValue = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) .map(Optional.some) } else { nickNameValue = .success(nil) } let ageValue: ValidationResult if includesProfile { ageValue = $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) .map(Optional.some) } else { ageValue = .success(nil) } guard case .success(let idValue) = idValue, case .success(let passwordValue) = passwordValue, case .success(let favoriteFruitValue) = favoriteFruitValue, case .success(let ageValue) = ageValue, case .success(let nickNameValue) = nickNameValue else { return nil }

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let nickNameValue: ValidationResult if includesProfile { nickNameValue = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) .map(Optional.some) } else { nickNameValue = .success(nil) } let ageValue: ValidationResult if includesProfile { ageValue = $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) .map(Optional.some) } else { ageValue = .success(nil) } guard case .success(let idValue) = idValue, case .success(let passwordValue) = passwordValue, case .success(let favoriteFruitValue) = favoriteFruitValue, case .success(let ageValue) = ageValue, case .success(let nickNameValue) = nickNameValue else { return nil } ৚݅෇͖όϦσʔγϣϯͷͨΊͷJG

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let nickNameValue: ValidationResult if includesProfile { nickNameValue = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) .map(Optional.some) } else { nickNameValue = .success(nil) } let ageValue: ValidationResult if includesProfile { ageValue = $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) .map(Optional.some) } else { ageValue = .success(nil) } guard case .success(let idValue) = idValue, case .success(let passwordValue) = passwordValue, case .success(let favoriteFruitValue) = favoriteFruitValue, case .success(let ageValue) = ageValue, case .success(let nickNameValue) = nickNameValue else { return nil } ܕΛ߹ΘͤΔͨΊͷNBQ ͺͬͱݟԿ͍ͯ͠Δ͔Θ͔Βͳ͍

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let nickNameValue: ValidationResult if includesProfile { nickNameValue = $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) .map(Optional.some) } else { nickNameValue = .success(nil) } let ageValue: ValidationResult if includesProfile { ageValue = $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) .map(Optional.some) } else { ageValue = .success(nil) } guard case .success(let idValue) = idValue, case .success(let passwordValue) = passwordValue, case .success(let favoriteFruitValue) = favoriteFruitValue, case .success(let ageValue) = ageValue, case .success(let nickNameValue) = nickNameValue else { return nil } ৚݅෇͖όϦσʔγϣϯେมʜ ΋ͬͱָʹॻ͚ͳ͍΋ͷ͔

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💡

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ʮ4XJGU6*Έ͍ͨͳ਌͠Έ΍͍͢ γϯλοΫεͰॻ͚ͨΒ͍͍ͷʹʯ

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ʮ4XJGU6*ͷ͋ͷγϯλοΫε ͸3FTVMU#VJMEFS΍ͳʯ

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ʮ͋Εʁ ࠓͷঢ়گͰ࢖͑ΔͷͰ͸ʁʯ

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3FTVMU#VJMEFSΛ࢖͏

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3FTVMU#VJMEFSΛ࡞੒ @resultBuilder enum ValidationResultBuilder { static func buildExpression(_ expression: Content) -> ValidationResult { .success(expression) } static func buildExpression(_ expression: ValidationResult) -> ValidationResult { expression } static func buildBlock(_ result: ValidationResult) -> ValidationResult { result } static func buildOptional(_ component: ValidationResult?) -> ValidationResult { guard let component else { return .success(nil) } switch component { case .success(let value): return .success(value) case .failed: return .failed } } static func buildEither(first: ValidationResult?) -> ValidationResult { buildOptional(first) } static func buildEither(second: ValidationResult?) -> ValidationResult { buildOptional(second) } static func buildBlock() -> ValidationResult { .success(()) } static func buildBlock(_ c0: ValidationResult, _ c1: ValidationResult) -> ValidationResult<(C0, C1)> { guard let c0 = c0.successValue, let c1 = c1.successValue else { return .failed } return .success((c0, c1)) } … }

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3FTVMU#VJMEFSΛ࡞੒ @resultBuilder enum ValidationResultBuilder { static func buildExpression(_ expression: Content) -> ValidationResult { .success(expression) } static func buildExpression(_ expression: ValidationResult) -> ValidationResult { expression } static func buildBlock(_ result: ValidationResult) -> ValidationResult { result } static func buildOptional(_ component: ValidationResult?) -> ValidationResult { guard let component else { return .success(nil) } switch component { case .success(let value): return .success(value) case .failed: return .failed } } static func buildEither(first: ValidationResult?) -> ValidationResult { buildOptional(first) } static func buildEither(second: ValidationResult?) -> ValidationResult { buildOptional(second) } static func buildBlock() -> ValidationResult { .success(()) } static func buildBlock(_ c0: ValidationResult, _ c1: ValidationResult) -> ValidationResult<(C0, C1)> { guard let c0 = c0.successValue, let c1 = c1.successValue else { return .failed } return .success((c0, c1)) } … } ৄࡉ͸ׂѪ

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ྫ let result: ValidationResult<(Int, String)> = ValidationResult.combine { ValidationResult.success(0) ValidationResult.success("string") } DPNCJOFͱ͍͏ϝιουΛ༻ҙͨ͠ ෳ਺ͷ7BMJEBUJPO3FTVMUΛͭͷ7BMJEBUJPO3FTVMUʹ·ͱΊͯ͘ΕΔ

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ྫ let result: ValidationResult<(Int, String)> = ValidationResult.combine { ValidationResult.success(0) ValidationResult.success("string") } *OUͷ7BMJEBUJPO3FTVMU 4USJOHͷ7BMJEBUJPO3FTVMU Λ·ͱΊΔ

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ྫ let result: ValidationResult<(Int, String)> = ValidationResult.combine { ValidationResult.success(0) ValidationResult.success("string") } ݁Ռ͸λϓϧͱͳΔ ValidationResult ValidationResult ValidationResult<(Int, String)> 

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ྫ let result: ValidationResult<(Int, String?)> = ValidationResult.combine { ValidationResult.success(0) if .random() { ValidationResult.success("string") } }

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ྫ let result: ValidationResult<(Int, String?)> = ValidationResult.combine { ValidationResult.success(0) if .random() { ValidationResult.success("string") } } JG΋࢖͑Δ

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ྫ let result: ValidationResult<(Int, String?)> = ValidationResult.combine { ValidationResult.success(0) if .random() { ValidationResult.success("string") } } Φϓγϣφϧͱͯ͠ѻΘΕΔ *GͷதʹೖΔͱTPNF ೖΒͳ͍ͱOJM ͱͳΔ

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ྫ let result: ValidationResult<(Int, (String, Double)?)> = ValidationResult.combine { ValidationResult.success(0) if .random() { ValidationResult.success("string") ValidationResult.success(0.0) } } JGͷதͷཁૉΛ૿΍ͯ͠ΈΔ

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ྫ let result: ValidationResult<(Int, (String, Double)?)> = ValidationResult.combine { ValidationResult.success(0) if .random() { ValidationResult.success("string") ValidationResult.success(0.0) } } λϓϧͷΦϓγϣφϧͱͳΔ

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ྫ let result: ValidationResult<(Int, (String, Double)?)> = ValidationResult.combine { ValidationResult.success(0) if .random() { ValidationResult.success("string") ValidationResult.success(0.0) } }

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ྫ let result: ValidationResult<(Int, (String, Double)?)> = ValidationResult.combine { ValidationResult.success(0) if .random() { ValidationResult.success("string") ValidationResult.success(0.0) } }

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ྫ let result: ValidationResult<(Int, (String, Double)?)> = ValidationResult.combine { ValidationResult.success(0) if .random() { ValidationResult.success("string") ValidationResult.success(0.0) } }

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ྫ let result: ValidationResult<(Int, (String, Double)?)> = ValidationResult.combine { ValidationResult.success(0) if .random() { ValidationResult.success("string") ValidationResult.success(0.0) } }

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ྫ ValidationResult.combine { ValidationResult.combine { ValidationResult.combine { ValidationResult.combine { ValidationResult.combine { ValidationResult.success("string") } } } } } DPNCJOFͷதͰ΋DPNCJOFΛ࢖͑Δ 4XJGU6*Ͱ7JFXΛωετͰ͖Δͷͱಉ͡

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࣮ࡍʹ࢖ͬͯΈΔ

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mutating func validateProfile() -> ValidationResult { let result: ValidationResult<(String, Int)> = ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } return result.map { (nickName: String, age: Int) in RegisterRequest.Profile(nickName: nickName, age: age) } } ͜ͷ෦෼ͷόϦσʔγϣϯॲཧ

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mutating func validateProfile() -> ValidationResult { let result: ValidationResult<(String, Int)> = ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } return result.map { (nickName: String, age: Int) in RegisterRequest.Profile(nickName: nickName, age: age) } }

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mutating func validateProfile() -> ValidationResult { let result: ValidationResult<(String, Int)> = ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } return result.map { (nickName: String, age: Int) in RegisterRequest.Profile(nickName: nickName, age: age) } }

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mutating func validateProfile() -> ValidationResult { let result: ValidationResult<(String, Int)> = ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } return result.map { (nickName: String, age: Int) in RegisterRequest.Profile(nickName: nickName, age: age) } }

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mutating func validateProfile() -> ValidationResult { let result: ValidationResult<(String, Int)> = ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } return result.map { (nickName: String, age: Int) in RegisterRequest.Profile(nickName: nickName, age: age) } } DPNCJOFϝιουͰแΉ

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mutating func validateProfile() -> ValidationResult { let result: ValidationResult<(String, Int)> = ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } return result.map { (nickName: String, age: Int) in RegisterRequest.Profile(nickName: nickName, age: age) } } ྆ํͷόϦσʔγϣϯ͕ύεͨ࣌͠ʹ 4USJOH *OU ͷλϓϧΛೖखͰ͖Δ

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mutating func validateProfile() -> ValidationResult { let result: ValidationResult<(String, Int)> = ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } return result.map { (nickName: String, age: Int) in RegisterRequest.Profile(nickName: nickName, age: age) } } ྆ํͷόϦσʔγϣϯ͕ύεͨ࣌͠ʹ 4USJOH *OU ͷλϓϧΛೖखͰ͖Δ

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mutating func validateProfile() -> ValidationResult { let result: ValidationResult<(String, Int)> = ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } return result.map { (nickName: String, age: Int) in RegisterRequest.Profile(nickName: nickName, age: age) } } ྆ํͷόϦσʔγϣϯ͕ύεͨ࣌͠ʹ 4USJOH *OU ͷλϓϧΛೖखͰ͖Δ

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mutating func validateProfile() -> ValidationResult { let result: ValidationResult<(String, Int)> = ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } return result.map { (nickName: String, age: Int) in RegisterRequest.Profile(nickName: nickName, age: age) } } ValidationResult<(String, Int)> ValidationResult ܕΛม׵

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let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } }

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let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } }

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let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } }

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let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } }

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let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } }

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let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } JODMVEFT1SP fi MF͕USVFͷ࣌͸TPNF GBMTFͷ࣌͸OJMʹͳΔ

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let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } ʮϓϩϑΟʔϧೖྗཝ͕Φϯͷ࣌ʹϓϩϑΟʔϧ෦෼ΛόϦσʔγϣϯ͢Δʯ ͱ͍͏࢓༷͕ίʔυͰදݱͰ͖͍ͯΔ

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let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } return result.map { id, password, favoriteFruit, profile in RegisterRequest(id: id, password: password, favoriteFruit: favoriteFruit, profile: profile) } ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> ValidationResult

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let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } return result.map(RegisterRequest.init) Ҿ਺ͷॱ൪ͱλϓϧͷॱ൪͕ಉ͡ͳͷͰ͜ΕͰ΋ྑ͍

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let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } return result.map(RegisterRequest.init) 3FTVMU#VJMEFSʹΑͬͯ৚݅෇͖όϦσʔγϣϯΛ௚ײతʹॻ͚ΔΑ͏ʹͳͬͨ

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let result: ValidationResult<(String, String, Fruit, RegisterRequest.Profile?)> = ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } return result.map(RegisterRequest.init) ͍ͭͰʹHVBSEMFU΋ෆཁʹͳͬͨ

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࠷ऴܕ

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struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? var includesProfile = false @Field var nickName = "" @Field var age = "" mutating func validate() -> ValidationResult { $id.clearError() $password.clearError() $favoriteFruit.clearError() $nickName.clearError() $age.clearError() return ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } .map(RegisterRequest.init) } mutating func validateProfile() -> ValidationResult { ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } .map(RegisterRequest.Profile.init) } }

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struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? var includesProfile = false @Field var nickName = "" @Field var age = "" mutating func validate() -> ValidationResult { $id.clearError() $password.clearError() $favoriteFruit.clearError() $nickName.clearError() $age.clearError() return ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } .map(RegisterRequest.init) } mutating func validateProfile() -> ValidationResult { ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } .map(RegisterRequest.Profile.init) } } 7JFX͔Βঢ়ଶͱϩδοΫΛ෼཭ͤͨ͞

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struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? var includesProfile = false @Field var nickName = "" @Field var age = "" mutating func validate() -> ValidationResult { $id.clearError() $password.clearError() $favoriteFruit.clearError() $nickName.clearError() $age.clearError() return ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } .map(RegisterRequest.init) } mutating func validateProfile() -> ValidationResult { ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } .map(RegisterRequest.Profile.init) } } ϘΠϥʔϓϨʔτΛ1SPQFSUZ8SBQQFSͰղܾ

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struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? var includesProfile = false @Field var nickName = "" @Field var age = "" mutating func validate() -> ValidationResult { $id.clearError() $password.clearError() $favoriteFruit.clearError() $nickName.clearError() $age.clearError() return ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } .map(RegisterRequest.init) } mutating func validateProfile() -> ValidationResult { ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } .map(RegisterRequest.Profile.init) } } όϦσʔγϣϯ৚݅Λ ࠶ར༻Մೳ ίʔυิ׬Մೳ ݁߹Մೳ ʹͨ͠

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struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? var includesProfile = false @Field var nickName = "" @Field var age = "" mutating func validate() -> ValidationResult { $id.clearError() $password.clearError() $favoriteFruit.clearError() $nickName.clearError() $age.clearError() return ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } .map(RegisterRequest.init) } mutating func validateProfile() -> ValidationResult { ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } .map(RegisterRequest.Profile.init) } } 3FTVMU#VJMEFSͰ৚݅෇͖όϦσʔγϣϯΛ ௚ײతʹهड़

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struct RegisterForm { @Field var id = "" @Field var password = "" @Field var favoriteFruit: Fruit? var includesProfile = false @Field var nickName = "" @Field var age = "" mutating func validate() -> ValidationResult { $id.clearError() $password.clearError() $favoriteFruit.clearError() $nickName.clearError() $age.clearError() return ValidationResult.combine { $id.validate( with: .count(isIn: 1 ... 20) && .isOnlyAlphanumeric, errorMessage: "ID͸1~20จࣈҎ಺ͷӳ਺ࣈͰೖྗ͍ͯͩ͘͠͞" ) $password.validate( with: .count(isIn: 1 ... 20), errorMessage: "ύεϫʔυ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $favoriteFruit.validateNotNil( errorMessage: "޷͖ͳϑϧʔπΛબ୒͍ͯͩ͘͠͞" ) if includesProfile { validateProfile() } } .map(RegisterRequest.init) } mutating func validateProfile() -> ValidationResult { ValidationResult.combine { $nickName.validate( with: .count(isIn: 1 ... 20), errorMessage: "χοΫωʔϜ͸1~20จࣈҎ಺Ͱೖྗ͍ͯͩ͘͠͞" ) $age.validate( byTransform: Int.init, with: .range(in: 0 ... 999), errorMessage: "೥ྸ͸0ʙ999ͷൣғͰೖྗ͍ͯͩ͘͠͞" ) } .map(RegisterRequest.Profile.init) } } 3FTVMU#VJMEFSʹΑΓ7BMJEBUJPO3FTVMUΛ߹੒Մೳʹ

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࣮ࡍ΍ͬͯΈͨ݁Ռ w ͏·͍ͬͨ͘ͷͰ͸ͳ͍͔ͱࢥ͏ w ࠷ॳʹʮ͜͏͍͏࣮૷Ͱ౷Ұ͠·͢ʯͱ͍͏ϨΫνϟʔΛͨ͠ w େ͖ͳτϥϒϧ΋ͳ͘͜ͷελΠϧͰ࣮૷͖ͬͨ͠ w ଞϓϩδΣΫτͰ΋ྲྀ༻͍͔ͨ͠ͱ͍͏ͱ΍͸Γن໛࣍ୈɻগͳ͍ͳΒ۪ ௚ʹ΍Δͷ͕ྑͦ͞͏

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·ͱΊ w େྔͷը໘Λ࣮૷͕όϥόϥʹͳΒͳ͍Α͏ͳઃܭΛߟ͑ͨ w ͸͡Ί͔Β͏·͘࡞Εͳ͍ͷͰʮ۪௚ʹ࡞Δˠ௚͢ʯΛ܁Γฦͨ͠

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࿩ͤͳ͔ͬͨ͜ͱ w Τϥʔͷཧ༝ʹΑͬͯΤϥʔϝοηʔδΛม͍͑ͨ࣌Ͳ͏͢Δͷ͔ w 7JFXଆͰ͸&OWJSPONFOUΛ࢖ͬͯΤϥʔͷঢ়ଶΛԼҐͷ7JFXʹ఻͑ ͍ͯΔ͜ͱ

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͋Γͦ͏ͳ࣭໰ w 2όϦσʔγϣϯॲཧ๯಄ͷΤϥʔঢ়ଶͷϦηοτ͸WBMJEBUFϝιου ͷλΠϛϯάͰ΍Ε͹ྑ͍ͷͰ͸ʁ w "Τϥʔ͕ى͖ͨޙʹόϦσʔγϣϯର৅֎ʹͳΔͱWBMJEBUFϝιου ͕ݺ͹Εͳ͍ͷͰΤϥʔঢ়ଶ͕Ϧηοτ͞Εͳ͍··ʹͳͬͯ͠·͏ͨΊ ͦΕ͸Ͱ͖·ͤΜͰͨ͠ɻ