/**
 * @file      Option.Types.ts
 * @author    Gage Sorrell <gage@sorrell.sh>
 * @copyright (c) 2026 Gage Sorrell
 * @license   MIT
 */
/**
 * For a given {@link ObjectType} containing some optional properties whose keys belong
 * to {@link KeyType}, transform the {@link ObjectType} such that *at least one* of the
 * properties whose keys belong to {@link KeyType} are made *not* optional.  That is,
 * this produces an `object` union of all possible forms where at least one of the
 * properties with key in {@link KeyType} is made not optional.
 *
 * @template ObjectType - The `object` type that is transformed such that at least one
 * of the properties whose respective keys belong to {@link KeyType} is required in this type.
 *
 * @template KeyType - The keys of {@link ObjectType} of which at least one of the
 * corresponding properties in {@link ObjectType} is required in this type.
 *
 * @note While it is not enforced in this type's definition, this type is a no-op on
 * the {@link ObjectType} if the properties in the {@link ObjectType} whose keys belong
 * to {@link KeyType} are *not* optional.  That is, you likely want *all* properties in
 * the {@link ObjectType} whose keys belong to {@link KeyType} to be optional.
 */
export type AtLeastOne<ObjectType, KeyType extends keyof ObjectType = keyof ObjectType> = Omit<ObjectType, KeyType> & {
    [Key in KeyType]-?: Required<Pick<ObjectType, Key>> & Partial<Omit<Pick<ObjectType, KeyType>, Key>>;
}[KeyType];
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