import { MaybePromise } from '@mithic/commons';
import { MaybeAsyncMap } from './map.js';
import { MaybeAsyncReadonlySet } from './set.js';
/** An arena automatically assigns unique key to stored value. */
export interface Arena<K, V> extends MaybeAsyncMap<K, V> {
    /** Adds a value to the arena and returns its key. */
    add(value: V): MaybePromise<K>;
    /** Updates a value on the arena. Does nothing if the key does not exist. */
    set(key: K, value: V): MaybePromise<unknown>;
}
/** A {@link Arena} with synchronous operations. */
export interface SyncArena<K, V> extends Arena<K, V> {
    add(value: V): K;
    set(key: K, value: V): void;
    get(key: K): V | undefined;
    has(key: K): boolean;
}
/** Generator of values. */
export interface ValueGenerator<T> extends MaybeAsyncReadonlySet<T> {
    /** Creates a new value. */
    create(): MaybePromise<T>;
    /** Deletes a value. */
    delete(value: T): MaybePromise<unknown>;
}
/** A {@link ValueGenerator} with synchronous operations. */
export interface SyncGenerator<T> extends ValueGenerator<T> {
    create(): T;
    delete(value: T): void;
}
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