AsyncReturnType doesn't work with arguments

[fregante]

I'm not able to use this type:

type PromisedStringFunction = (query: string) => Promise<string>;
type ShouldBeAString = AsyncReturnType<PromisedStringFunction>;

I get this error:

Type '(query: string) => Promise<string>' does not satisfy the constraint 'AsyncFunction'.
  Types of parameters 'query' and 'args' are incompatible.
    Type 'unknown' is not assignable to type 'string'.ts(2344)

I had my own AsyncReturnType and it worked well with any, not unknown

[buschtoens]

Can you confirm you're really on the latest version? It works for me:

type PromiseValue<PromiseType, Otherwise = PromiseType> = PromiseType extends Promise<infer Value> ? Value : Otherwise;
type AsyncFunction = (...args: any[]) => Promise<unknown>;
type AsyncReturnType<Target extends AsyncFunction> = PromiseValue<ReturnType<Target>>;

type PromisedStringFunction = (query: string) => Promise<string>;
type ShouldBeAString = AsyncReturnType<PromisedStringFunction>;

TS Playground

[fregante]

Fixed by #96

Sorry!