/// <amd-module name="nova_ecs/utils" />
import { Draft } from "immer";
import { UnknownComponent } from "./component";
export interface WithComponents {
    components: ReadonlyMap<UnknownComponent, unknown>;
}
export declare function currentIfDraft<T>(val: T | Draft<T>): T;
/**
 * Topologically sort a directed graph stored as a map from nodes to incoming edges.
 */
export declare function topologicalSort<T>(graph: Map<T, Set<T>>): T[];
export declare function subset(a: ReadonlySet<unknown>, b: ReadonlySet<unknown>): boolean;
export declare function setEqual(a: ReadonlySet<unknown>, b: ReadonlySet<unknown>): boolean;
export declare function filterSet<T>(a: ReadonlySet<T>, f: (x: T) => boolean): Set<T>;
export declare function setDifference<T>(a: ReadonlySet<T>, b: ReadonlySet<T>): Set<T>;
export declare function setIntersection<T>(a: ReadonlySet<T>, b: ReadonlySet<T>): Set<T>;
export declare class DefaultMap<K, V> extends Map<K, V> {
    private factory;
    constructor(factory: (key: K) => V, entries?: Iterable<readonly [K, V]>);
    get(key: K): V;
}
export declare function isPromise(p: unknown): p is Promise<unknown>;