Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Re: エラーと警告でコードをデザインする
Search
Yuka Ezura
March 22, 2017
Programming
2
980
Re: エラーと警告でコードをデザインする
Yuka Ezura
March 22, 2017
Tweet
Share
More Decks by Yuka Ezura
See All by Yuka Ezura
Mastering share sheet preview
ezura
4
1.4k
SF Symbols
ezura
9
1.3k
気遣いの iOS プログラミング
ezura
11
3.5k
Secret Swift tour
ezura
7
2.9k
Swift Album ver.4.1
ezura
3
1.5k
Swift と Kotlin
ezura
4
2.7k
哲学とSwiftの発表
ezura
5
600
アプリが動いたその先へ (iOS アプリ開発編)
ezura
1
1k
Blending Kotlin's culture into Swift
ezura
1
1.3k
Other Decks in Programming
See All in Programming
Development of an App for Intuitive AI Learning - Blockly Summit 2025
teba_eleven
0
110
Javaのルールをねじ曲げろ!禁断の操作とその代償から学ぶメタプログラミング入門 / A Guide to Metaprogramming: Lessons from Forbidden Techniques and Their Price
nrslib
3
2k
Claude Codeの使い方
ttnyt8701
1
120
Effect の双対、Coeffect
yukikurage
5
1.4k
The Evolution of Enterprise Java with Jakarta EE 11 and Beyond
ivargrimstad
1
740
Rails産でないDBを Railsに引っ越すHACK - Omotesando.rb #110
lnit
1
160
技術懸念に立ち向かい 法改正を穏便に乗り切った話
pop_cashew
0
1.4k
イベントストーミングから始めるドメイン駆動設計
jgeem
4
850
Julia という言語について (FP in Julia « SIDE: F ») for 関数型まつり2025
antimon2
3
960
Datadog RUM 本番導入までの道
shinter61
1
280
Using AI Tools Around Software Development
inouehi
0
1.2k
Cloudflare Realtime と Workers でつくるサーバーレス WebRTC
nekoya3
0
410
Featured
See All Featured
Writing Fast Ruby
sferik
628
61k
BBQ
matthewcrist
89
9.7k
Designing Experiences People Love
moore
142
24k
Code Review Best Practice
trishagee
68
18k
The Illustrated Children's Guide to Kubernetes
chrisshort
48
50k
Gamification - CAS2011
davidbonilla
81
5.3k
We Have a Design System, Now What?
morganepeng
52
7.6k
Designing Dashboards & Data Visualisations in Web Apps
destraynor
231
53k
The Language of Interfaces
destraynor
158
25k
Docker and Python
trallard
44
3.4k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
15
1.5k
Bash Introduction
62gerente
614
210k
Transcript
Re: ΤϥʔͱܯࠂͰ ίʔυΛσβΠϯ͢Δ 2017/3/22 ezura
ςετ ։ൃମ੍ɾڥ ઃܭࢥɾཧ ݴޠʹΑΔ αϙʔτ j j j j ϜϲεϮϥᩆᕥ
https://speakerdeck.com/ezura/eratojing-gao-de-kodowodezainsuru-chi- tohuang-falselun-wu-qu ΤϥʔͱܯࠂͰίʔυΛσβΠϯ͢Δ NFUIPEṺ΅ᲇͩᘡᔀ͞ᩆ͖ͩͥͺΤ θϸϖΩϰᙉͽݕᒕͫΝ
લఏ struct Object { var name: String var something: Any
func common() { /* do something */ } func method1() { /* do something */ } func method2() { /* do something */ } }
method1 Λ࣮ߦ͔ͯ͠ΒͷΈ method2 Λ࣮ߦՄೳ (ҧΛίϯύΠϧ࣌ʹݕ) Mission1 // OK object.method1().method2() //
Error object.method2()
method1, method2 Λ࣮ߦޙͷ ΠϯελϯεͷΈҾͱͯ͠ड͚औΔؔ (ҧΛίϯύΠϧ࣌ʹݕ) Mission2 // OK accept(object.method1().method2()) //
Error accept(object.method2())
࣮
࣮ͷ֓೦ਤ instance Init state instance State1 instance State2 func method1
func method2
struct Object<State> { var name: String var something: Any func
common() { /* do something */ } }
extension Object where State: Init { func method1() -> Object<State1>
{ /* do something */ } } extension Object where State: State1 { func method2() -> Object<State2> { /* do something */ } } func accept(_ object: Object<State2>) { /* do something */ }
࣮ͷ֓೦ਤ instance Init state instance State1 instance State2 func method1
func method2 Object<Init> Object<State1> Object<State2>
ཧΘ͔ͬͨʂ ࣮ʹམͱ͠ࠐΜͰΈΑ͏
extension Object where State: Init { func method1() -> Object<State2>
{ let object = Object<State2>(…) // Object ͷϓϩύςΟΛҾ͖ܧ͗ return object } }
ܕύϥϝʔλ͕ҧ͏Πϯελϯε (= ҟͳΔܕ) ͷؒͰͲ͏ͬͯσʔλΛҾ͖ܧ͝͏…
Object<Init> ͔Β Object<State1> σʔλΛҾ͖ܧ͙ʹʁʁ new.name = self.name new.something =
self.something struct Container { var name: String var something: Any }
ΩϟετͰ͖ΔΑʂ ۽୩͞Μ
Object<Init> ͔Β Object<State1> extension Object where State: Init {
func method1() -> Object<State2> { let object = unsafeBitCast(self, to: Object<State2>.self) // do something return object } } Object<Init> ͔Β Object<State1> Cast
࣮Ͱ͖ͨʂ ͍উखͲ͏͔ͳʁʁ
let object = Object<Init>(name: "sample", something: "something") <Init> ͷ໌͕ࣔඞཁ… (´ɾωɾʆ)
ίϯύΠϥʹ͑ͯΈΑ͏
extension Object where State: Init { init(name: String, something: Any)
{ self.name = name self.something = something } } State ͕ Init ͷͱ͖ͷΈ ίϯετϥΫλΛએݴ
let object = Object(name: "sample", something: "something") <Init> ͷ໌͕ࣔෆཁ :
͜Ε͕ՄೳͱͳΔ͕݅͋Γ·ׂ͕͢Ѫ͠·͢ (͕݅ἧ͍ͬͯͳ͍߹ɺίϯύΠϧΤϥʔ)
ͱͬͯ៉ྷʹͳΓ·ͨ͠ʂʂ ٩( 'ω' )و
https://gist.github.com/ezura/ e71db2b0471285061f9700809f92f2b1 ίʔυ
ࢀর • ۽୩ͱ៸໘͕ϓϩάϥϛϯάίʔυͷ͔Βௌ͑ͯ͘͜ ΔʹࣖΛָ͚ͯ͠ΉϥδΦ #9, #14 http://mookmookradio.com/a0005/ • where Ͱͷܕਪͷఏএऀͷํͷ
gist https://gist.github.com/tarunon/ d7071689ab55e29bd367a44833687aa3 • ΤϥʔͱܯࠂͰίʔυΛσβΠϯ͢Δ https://speakerdeck.com/ezura/eratojing-gao-de- kodowodezainsuru-chi-tohuang-falselun-wu-qu