import type { ComputeObject } from './computeObject.js';
type OptionalKeys<OBJECT extends object> = {
    [KEY in keyof OBJECT]-?: {} extends Pick<OBJECT, KEY> ? KEY : never;
}[keyof OBJECT];
type MergeValues<VALUE_A, VALUE_B, OPTIONAL_KEYS extends string | number | symbol, KEY extends string | number | symbol> = KEY extends OPTIONAL_KEYS ? Exclude<VALUE_A, undefined> | VALUE_B : VALUE_A extends undefined ? VALUE_B : VALUE_A;
type Anyfy<OBJECT extends object> = {
    [KEY in keyof OBJECT]: any;
};
/**
 * Accurately merge the fields of `OBJECT_A` with the ones of `OBJECT_B`.
 *
 * Optional fields are handled gracefully.
 */
export type Merge<OBJECT_A extends object, OBJECT_B extends object, OPTIONAL_KEYS extends string | number | symbol = OptionalKeys<OBJECT_A>> = ComputeObject<{
    [KEY in keyof (Anyfy<OBJECT_A> & OBJECT_B)]: KEY extends keyof OBJECT_A ? KEY extends keyof OBJECT_B ? MergeValues<OBJECT_A[KEY], OBJECT_B[KEY], OPTIONAL_KEYS, KEY> : OBJECT_A[KEY] : KEY extends keyof OBJECT_B ? OBJECT_B[KEY] : never;
}>;
export {};