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
ecmascript-proposal-first-class-protocol
Search
Taketoshi Aono(青野健利 a.k.a brn)
October 06, 2017
Programming
0
1.7k
ecmascript-proposal-first-class-protocol
EcmascriptのFirst class protocolの提案について
Taketoshi Aono(青野健利 a.k.a brn)
October 06, 2017
Tweet
Share
More Decks by Taketoshi Aono(青野健利 a.k.a brn)
See All by Taketoshi Aono(青野健利 a.k.a brn)
document.write再考
brn
6
3k
Parsing Javascript
brn
14
9.2k
JSON & Object Tips
brn
1
490
CA 1Day Youth Bootcamp for Frontend LT
brn
0
940
Modern TypeScript
brn
2
800
javascript - behind the scene
brn
3
740
tc39 proposals
brn
0
870
プロダクト開発とTypeScript
brn
8
2.9k
React-Springでリッチなアニメーション
brn
1
690
Other Decks in Programming
See All in Programming
Benchmark
sysong
0
220
Create a website using Spatial Web
akkeylab
0
290
AWS CDKの推しポイント 〜CloudFormationと比較してみた〜
akihisaikeda
3
280
Go1.25からのGOMAXPROCS
kuro_kurorrr
1
770
ktr0731/go-mcpでMCPサーバー作ってみた
takak2166
0
170
つよそうにふるまい、つよい成果を出すのなら、つよいのかもしれない
irof
1
290
事業戦略を理解してソフトウェアを設計する
masuda220
PRO
22
6.2k
AIコーディング道場勉強会#2 君(エンジニア)たちはどう生きるか
misakiotb
1
240
業務自動化をJavaとSeleniumとAWS Lambdaで実現した方法
greenflagproject
1
120
Perplexity Slack Botを作ってAI活用を進めた話 / AI Engineering Summit プレイベント
n3xem
0
670
都市をデータで見るってこういうこと PLATEAU属性情報入門
nokonoko1203
1
530
来たるべき 8.0 に備えて React 19 新機能と React Router 固有機能の取捨選択とすり合わせを考える
oukayuka
2
810
Featured
See All Featured
Why Our Code Smells
bkeepers
PRO
337
57k
Unsuck your backbone
ammeep
671
58k
Six Lessons from altMBA
skipperchong
28
3.8k
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
252
21k
Balancing Empowerment & Direction
lara
1
340
Improving Core Web Vitals using Speculation Rules API
sergeychernyshev
16
940
The Psychology of Web Performance [Beyond Tellerrand 2023]
tammyeverts
48
2.8k
For a Future-Friendly Web
brad_frost
179
9.8k
Docker and Python
trallard
44
3.4k
Rails Girls Zürich Keynote
gr2m
94
14k
Principles of Awesome APIs and How to Build Them.
keavy
126
17k
How GitHub (no longer) Works
holman
314
140k
Transcript
proposal-first-class-protocol
せ: @brn (ꫬꅿ⨳ⵃa.k.a ـٕ٦ظ) 耵噟: ؿٗٝزؒٝسؒٝآص،٥iOSؒٝآص، ⠓爡: Cyberagent ،سذؙأةآؔRightSegment٥AI Messenger
ـؚٗ: http://abcdef.gets.b6n.ch/ Twitter: https://twitter.com/brn227 GitHub: https://github.com/brn
What is this proposal ? protocolך䲿周 ⯋ղכinterfaceך䲿周կ
What is 'protocol' ? classָ㹋鄲ׅץֹ鋉秈邌ׅկ 㹋䡾כקהוinterfaceהずׄדծ swiftװobjective-cדכinterfaceprotocolהㄎןծ javaדכず瘝ךךinterfaceהㄎע(稢ְַ鎉铂➬圫♳ך麩ְכ֮ ָ)
Ecmascript way ׃ַ׃Ecmascriptךprotocolכֿך⚕倯ה殯ז杝荈ך➬圫ָ䲿 周ׁגְկ
As Symbol 植㖈䲿周⚥ךֿךproposalכprotocolծ ًاحس䭯אSymbolך꧊さה׃ג邌ׅկ
protocol ProtocolName {! // 実装が必要なシンボルを宣言 thisMustBeImplemented;! ! // メソッド実装 youGetThisMethodForFree()
{! return this[ProtocolName.thisMustBeImplemented]();! }! }! ! class ClassName implements ProtocolName {! [ProtocolName.thisMustBeImplemented]() {! ...! }! } !
Extends Existing class 傀㶷ךclassח㼎׃גprotocol㹋鄲ֿׅהָדֹկ
protocol Functor {! map;! }! ! Promise.prototype[Functor.map] = () =>
{! ...! }! ! Protocol.implement(Promise, Functor);!
'implements' keyword 倜חimplements怴皾㶨ָ鷄⸇ׁ
Promise implements Functor // true! ! if (MyClass implements SomeProtocol)
{ }!
Extends protocol protocolכ➭ךprotocol䭁䓸דֹ
protocol A { a; }! protocol B extends A {
b; }! ! class C implements B {! [A.a]() {}! [B.b]() {}! }! ! class D implements A {! [A.a]() {}! }!
Default Implementation ⴱ劍㹋鄲鷄⸇דֹ
protocol A { a; }! ! protocol B extends A
{! [A.a]() { ... }! }!
Static protocol 涸ًاحسprotocolדⵖ䖴ֿׅהָ〳腉
protocol A {! static b() {}! }! ! class C
implements A { }! C[A.b]();!
Issues 傀㶷ךؙٓأ䭁䓸ׅ㜥さծprototypeפך湫䱸➿Ⰵהְֲ䲿周ָ 遤גְկ ְֻזד儗➿鹼זךדծ➿剏周䲿周׃גְֶկ
Proposed 1 Protocol.impelemtꟼ侧ך痥♲䒷侧ד㹋鄲
protocol Functor {! map;! }! ! // If implementation is
not satisfied, throw TypeError.! Protocol.implement(Array, Functor, {! [Functor.map]: Array.prototype.map! });!
Proposed 2 傀㶷ךؙٓأⱄ䏝implementsؗ٦ٙ٦سד䭁䓸〳腉ח
protocol Functor {! map;! }! ! // We can implements
protocol after declaration.! Array implements Functor {! [Functor.map]: Array.prototype.map! }!
TypeScript? הִ֮׆ծ傀㶷ךinterfaceכ婍ׅדֲ֮הךֿהկ protocolוך״ֲז㘗ה׃ג䪔ֲַכ劢㹀 Allow dynamic name in typesהְֲ㘗ךفٗػذ؍せחsymbol ⢪ֲֿהָדֹPRָ鹌דְךדծ ָֿ㹋鄲ׁהprotocolأي٦ؤחְַֽկ
׀幠耮ָ֮הֲ׀ְׂת׃