[Feature request] allow set type when use let { a } = argv

[bluelovers]

Search Terms

Suggestion

allow set type when use

• let { a } = argv => let { a as string } = argv
• ({ a } = argv); => ({ a as string } = argv);

Use Cases

Examples

Checklist

My suggestion meets these guidelines:

• 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, etc.)
• This feature would agree with the rest of TypeScript's Design Goals.

[Mcfloy]

You can already do this with let { a } = argv as { a: string }

[bluelovers]

@Mcfloy i don't wanna do that way when i use let { a, b, c } = argv and only a type is incorrect

[DanielRosenwasser]

Duplicate of #7576.
Duplicate of #29526.