Microsoft/TypeScript

Don't suggest converting custom promise-like returning function to async ones

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#40.701 aberto em 22 de set. de 2020

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 (4 comments) (1 reaction) (0 assignees)TypeScript (6.726 forks)batch import
Domain: LS: RefactoringsExperience EnhancementHelp WantedSuggestion

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Description

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async converted function

Suggestion

Do not suggest that a function is converted to async if its return value is explicitly set to something that is not the global Promise type.

Use Cases

If using a package that provides an extended version of promises (for instance cancellable promises) then the transformation is wrong to occur.

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.

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