[feature request] destructured type assignment

Search Terms

typescript destructuring types

Suggestion

We can currently do:

type Lane = import('../Lane').Lane

But it would be nifty to be able to do:

type {Lane} = import('../Lane')

And taking it further, grab more things at once:

type {Lane, LaneColor, LaneSize} = import('../Lane')

instead of having to write

type Lane = import('../Lane').Lane
type LaneColor = import('../Lane').LaneColor
type LaneSize = import('../Lane').LaneSize

Use Cases

convenience

Examples

see above

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.

Commencez par examiner la syntaxe existante des imports de types et les exemples de cette issue, puis consultez la discussion de conception de TypeScript pour connaître les contraintes liées aux affectations de types déstructurées. Le travail est terminé lorsque les noms de types importés, uniques comme multiples, sont pris en charge sans modifier la sortie d’exécution de JavaScript, avec une couverture des formes présentées.