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

Search Terms

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.

ファイル、テスト、またはエントリーポイントは指定されていません。まず、関数を async に変換するよう提案するコンパイラ診断またはコードアクションを見つけ、次に要求された戻り値型の条件をどのようにテストするかを判断します。明示的に非グローバルな Promise 戻り値型に対して提案が行われなければ完了です。