Better ownership lint to eliminate ownership chaos for generated code

🔍 Search Terms

• proposal-explicit-resource-management
• ownership
• lifetime

✅ Viability Checklist

• This wouldn't be a breaking change in existing TypeScript/JavaScript code
• This wouldn't change the runtime behavior of existing JavaScript code
• This could be implemented without emitting different JS based on the types of the expressions
• This isn't a runtime feature (e.g. library functionality, non-ECMAScript syntax with JavaScript output, new syntax sugar for JS, etc.)
• This isn't a request to add a new utility type: https://github.com/microsoft/TypeScript/wiki/No-New-Utility-Types
• 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

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

> 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.

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

Comienza con los ejemplos de ownership de este issue y compara los issues de Deno enlazados con el issue 274 de TC39 proposal-explicit-resource-management. La solicitud no identifica archivos TypeScript, tests ni una lint rule concreta, y sus secciones sobre deficiencias y workaround siguen TBD. Una propuesta completa tendría que definir el modelo de ownership, los diagnósticos y el comportamiento esperado antes de que pueda comenzar la implementación.