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type UnionToIntersection<U> =
    (U extends any ? (k: U) => void : never) extends ((k: infer I) => void) ? I : never;

// Example Usage:
type A = { a: string };
type B = { b: number };
type C = { c: boolean };

type ABC_Union = A | B | C;
type ABC_Intersection = UnionToIntersection<ABC_Union>; // Expected: A & B & C

const combined: ABC_Intersection = {
    a: "hello",
    b: 123,
    c: true,
};

// Useful for scenarios like merging callback functions:
type Callback1 = (x: string) => void;
type Callback2 = (y: number) => void;
type Callback3 = (z: boolean) => void;

type MergedCallbacks = UnionToIntersection<Callback1 | Callback2 | Callback3>;
// MergedCallbacks is equivalent to (x: string) => void & (y: number) => void & (z: boolean) => void
// This effectively means a function that can accept any of the parameters,
// though its primary use is for object property merging or specific advanced patterns.

// A more practical application: creating an object with properties from each union member
interface UserSettings { theme: 'dark' | 'light'; }
interface UserPermissions { isAdmin: boolean; canEdit: boolean; }
interface UserProfile { name: string; email: string; }

type AllUserConfig = UnionToIntersection<UserSettings | UserPermissions | UserProfile>;
/*
Expected:
{
    theme: 'dark' | 'light';
    isAdmin: boolean;
    canEdit: boolean;
    name: string;
    email: string;
}
*/

const userConfig: AllUserConfig = {
    theme: 'dark',
    isAdmin: true,
    canEdit: false,
    name: 'John Doe',
    email: 'john@example.com'
};