How to declare an argument with an array of functions and promises?

Question

JavaScript

I can't figure out how to declare a function argument, which is an array of functions, each of which returns a promise. Here is my attempt at the declaration (doesn't work)

function anyFunc(inputFunctions: (<T>() => Promise<T>)[]) {
    return Promise.all(inputFunctions.map(value => value()));
}

use like this:

anyFunc([() => Promise.resolve(1), () => Promise.resolve("a")]).then(value => {
    console.log(value); //[1, "a"]
});

that is, in the end, ts should know what kind of values ​​are in value
, the error itself:

Type 'Promise<string>' is not assignable to type 'Promise<T>'.
  Type 'string' is not assignable to type 'T'.

Answer 1

type PromiseCallResults<T> = {
  [P in keyof T]: T[P] extends (() => Promise<infer R>) ? R : never;
}

function anyFunc<T extends (()=>Promise<unknown>)[]>(...inputFunctions: T) {
  return Promise.all(inputFunctions.map(value => value())) as Promise<PromiseCallResults<T>>;
}

anyFunc(() => Promise.resolve(1), () => Promise.resolve("a")).then(value => {
  console.log(value); //[1, "a"]

  const checktypes:[number, string] = value;
});