microsoft / microsoft/TypeScript
Better ownership lint to eliminate ownership chaos for generated code
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説明
### 🔍 Search Terms
- proposal-explicit-resource-management
- ownership
- lifetime
### ✅ Viability Checklist
- [x] This wouldn't be a breaking change in existing TypeScript/JavaScript code
- [x] This wouldn't change the runtime behavior of existing JavaScript code
- [x] This could be implemented without emitting different JS based on the types of the expressions
- [x] This isn't a runtime feature (e.g. library functionality, non-ECMAScript syntax with JavaScript output, new syntax sugar for JS, etc.)
- [x] This isn't a request to add a new utility type: https://github.com/microsoft/TypeScript/wiki/No-New-Utility-Types
- [x] This feature would agree with the rest of our Design Goals: https://github.com/Microsoft/TypeScript/wiki/TypeScript-Design-Goals
### ⭐ Suggestion
Better ownership lint to kill ownership chaos.
Maybe rust lifetime?
### 📃 Motivating Example
See
https://github.com/denoland/deno/issues/34953
Typescript should lint below code will crash due to ownership
```js
Deno.serve({}, async (_req) => {
using file = await Deno.open(new URL(import.meta.url).pathname);
return new Response(file.readable);
});
```
https://github.com/denoland/deno/issues/34953#issuecomment-4636526241
Some think
> `file.readable` carries ownership of the file
https://github.com/denoland/deno/issues/34953#issuecomment-4636588109
Some think `file.readable` does not carries ownership of the file
```js
> file.readable[Symbol.dispose]
undefined
```
### 💻 Use Cases
1. What do you want to use this for?
Better ownership type
2. What shortcomings exist with current approaches?
TBD
3. What workarounds are you using in the meantime?
No way.
## related
https://github.com/denoland/deno/issues/34931
Simple code leads to server crash due to ownership
Genered by AI.
Simplified for reproduce.
```ts
Deno.serve({}, async (_req) => {
using file = await Deno.open(new URL(import.meta.url).pathname);
return new Response(file.readable);
});
```
---
https://github.com/denoland/deno/issues/34953
How to easy stream file within deno server?
---
https://github.com/tc39/proposal-explicit-resource-management/issues/274
How does proposal-explicit-resource-management suggest how to easy extend stream file lifetime within server?
---
https://github.com/microsoft/TypeScript/issues/63540
Better ownership lint to kill ownership chaos
コントリビューションガイド
調査の方向性
この issue の ownership の例から始め、リンクされている Deno の issue と TC39 proposal-explicit-resource-management の issue 274 を比較してください。このリクエストでは、TypeScript ファイル、テスト、具体的な lint rule は特定されておらず、不足点と workaround のセクションもまだ TBD です。完全な提案では、実装を開始する前に ownership モデル、診断、期待される動作を定義する必要があります。
索引モデルが issue の本文から書いたものです。
評価
- 技術スタック
- javascript, typescript
- 領域
- compilers
- issue の種類
- 機能追加
- 難易度
- 5/5
- 見積もり時間
- 1週間以上
- 活発さ
- 静か
- 明瞭さ
- 説明が足りない
- 初心者へのやさしさ
- 18/100