import { type Primitive } from './Primitive.js';
/**
 * Same as built-in `Readonly`, but works recursively:
 *
 * ```TypeScript
 * import { DeepReadonly } from '@ori/ts-utils';
 *
 * const rawData = {
 *   foo: ['bar'],
 * };
 *
 * const data: DeepReadonly<typeof rawData> = rawData;
 *
 * data.foo.push('bar'); // error TS2339: Property 'push' does not exist on type 'readonly string[]'
 * ```
 *
 * @typeParam T Base for the new type
 */
export type DeepReadonly<T> = T extends Primitive | ((...args: any[]) => unknown) ? T : T extends ReadonlyMap<infer K, infer V> ? DeepReadonlyMap<K, V> : T extends ReadonlySet<infer I> ? DeepReadonlySet<I> : T extends object ? DeepReadonlyObject<T> : unknown;
/**
 * Helper type for {@link DeepReadonly}.
 */
type DeepReadonlyMap<K, V> = ReadonlyMap<DeepReadonly<K>, DeepReadonly<V>>;
/**
 * Helper type for {@link DeepReadonly}.
 */
type DeepReadonlySet<I> = ReadonlySet<DeepReadonly<I>>;
/**
 * Helper type for {@link DeepReadonly}.
 */
type DeepReadonlyObject<O extends object> = {
    readonly [K in keyof O]: DeepReadonly<O[K]>;
};
export {};