microsoft / microsoft/TypeScript
Better ownership lint to eliminate ownership chaos for generated code
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Description
### 🔍 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
Guide de contribution
Ouvrir le guide de contribution
Piste de recherche
Commencez par les exemples d’ownership de cette issue et comparez les issues Deno liées avec l’issue 274 de TC39 proposal-explicit-resource-management. La demande n’identifie pas de fichiers TypeScript, de tests ni de lint rule concrète, et ses sections sur ses lacunes et son workaround sont encore TBD. Une proposition complète devrait définir le modèle d’ownership, les diagnostics et le comportement attendu avant de pouvoir commencer l’implémentation.
Rédigé par le modèle d'indexation à partir du texte de l'issue.
Évaluation
- Stack technique
- javascript, typescript
- Domaine
- compilers
- Type d'issue
- Fonctionnalité
- Difficulté
- 5/5
- Temps estimé
- Plus d'une semaine
- Activité
- Calme
- Clarté
- À clarifier
- Accessibilité débutants
- 18/100