Parameters hints tooltip do not spread inferred arguments (inferred arguments names not visible). #28127

type Fn = (...args: any[]) => any;
type ArgumentTypes<T extends Fn> = T extends (...args: infer U) => any ? U : never;

function buildActionCreator<
  T extends string,
  P extends (...args: any[]) => any
>(type: T, payloadCreator?: P) {
    return (...args: ArgumentTypes<P>) => {
        const payload = payloadCreator(...args) as ReturnType<P>;
        return {
            type,
            payload,
        };
    };
};

// if you hover here on setAge, the inferred arguments
// are spreaded and their names preserved: (age: number) => { ... }
const setAge = buildActionCreator("SET_AGE", (age: number) => ({ age }));

// the toolip showing function signatures when typing the open parenthesis
// do not spread arguments, the arguments names are lost: (...args: [number]) => { ... }  
// note that the hover on function tooltip still works ok
setAge(10);