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
AI時代の『改訂新版 良いコード/悪いコードで学ぶ設計入門』 / ai-good-code-bad-code
minodriven
23
9.2k
Deep Dive into ~/.claude/projects
hiragram
14
12k
効率的な開発手段として VRTを活用する
ishkawa
0
160
猫と暮らす Google Nest Cam生活🐈 / WebRTC with Google Nest Cam
yutailang0119
0
170
『自分のデータだけ見せたい!』を叶える──Laravel × Casbin で複雑権限をスッキリ解きほぐす 25 分
akitotsukahara
2
650
PHPでWebSocketサーバーを実装しよう2025
kubotak
0
310
VS Code Update for GitHub Copilot
74th
2
670
NEWT Backend Evolution
xpromx
1
120
Azure AI Foundryではじめてのマルチエージェントワークフロー
seosoft
0
200
初学者でも今すぐできる、Claude Codeの生産性を10倍上げるTips
s4yuba
16
12k
Git Sync を超える!OSS で実現する CDK Pull 型デプロイ / Deploying CDK with PipeCD in Pull-style
tkikuc
4
310
Google Agent Development Kit でLINE Botを作ってみた
ymd65536
2
260
Featured
See All Featured
A Tale of Four Properties
chriscoyier
160
23k
Building an army of robots
kneath
306
45k
A designer walks into a library…
pauljervisheath
207
24k
Facilitating Awesome Meetings
lara
54
6.5k
Helping Users Find Their Own Way: Creating Modern Search Experiences
danielanewman
29
2.7k
Optimising Largest Contentful Paint
csswizardry
37
3.3k
It's Worth the Effort
3n
185
28k
RailsConf & Balkan Ruby 2019: The Past, Present, and Future of Rails at GitHub
eileencodes
138
34k
Learning to Love Humans: Emotional Interface Design
aarron
273
40k
Navigating Team Friction
lara
187
15k
How STYLIGHT went responsive
nonsquared
100
5.6k
Into the Great Unknown - MozCon
thekraken
40
1.9k
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