/**
 * @ignore
 *
 * A primitive value.
 */
export declare type PrimitiveValue = undefined | null | boolean | number | string | bigint;
/**
 * @ignore
 *
 * Checks if a value is optional (undefined, any or unknown).
 *
 * Examples:
 * - string = false
 * - undefined = true
 * - string | undefined = true
 * - string & undefined = false, but we don't care
 * - any = true
 * - unknown = true
 * - null = false
 * - string | null = false
 * - string & null = false
 */
export declare type IsOptionalValue<C, TV, FV> = undefined extends C ? TV : FV;