type Protected<T>

A deep readonly typed version of given type T. Makes all properties or elements read only. It maps types using the following rules: - arrays and tuples become readonly counterparts, and all element types are wrapped in Protected if applicable - Maps of key type K and value type V become Maps of key type Protected<K> and value type Protected<V> - Sets of element type E become Sets of element type Protected<E> - Promises of value type E become Promises of value type Protected<E> - Objects that have only simple properties (no functions or iterators) will have all the properties as Protected if applicable - Any other type will not be mapped

Definition

export type Protected<T> = IsAny<T> extends true ? T : T extends readonly any[] & infer A ? {
  readonly [K in keyof A]: Protected<A[K]>;
} : T extends Map<infer K, infer V> ? ReadonlyMap<Protected<K>, Protected<V>> : T extends Set<infer E> ? ReadonlySet<Protected<E>> : T extends Promise<infer E> ? Promise<Protected<E>> : IsPlainObj<T> extends true ? {
  readonly [K in keyof T]: Protected<T[K]>;
} : T;