/**
 * @module
 *
 * MeekMap data collection.
 */
/**
 * Like WeakMap.
 *
 * @template K Key type.
 * @template V Value type.
 */
export declare class MeekMap<K extends WeakKey = WeakKey, V = any> {
    /**
     * Type string.
     */
    readonly [Symbol.toStringTag]: string;
    /**
     * Create a new MeekMap.
     *
     * @param iterable Initial pairs.
     */
    constructor(iterable?: Iterable<readonly [K, V]> | null);
    /**
     * Iterator for key-value pairs in this map.
     *
     * @returns Key-value iterator.
     */
    [Symbol.iterator](): MapIterator<[K, V]>;
    /**
     * Clear this map.
     */
    clear(): void;
    /**
     * Delete a key from this map.
     *
     * @param key Key to delete.
     * @returns Whether the key was deleted.
     */
    delete(key: K): boolean;
    /**
     * Iterator for key-value pairs in this map.
     *
     * @returns Key-value iterator.
     */
    entries(): MapIterator<[K, V]>;
    /**
     * Call a function for each pair in this map.
     *
     * @param callbackfn Callback function.
     * @param thisArg This argument.
     */
    forEach(callbackfn: (value: V, key: K, map: MeekMap<K, V>) => void, thisArg?: any): void;
    /**
     * Get the value for a key from this map.
     *
     * @param key Key to get.
     * @returns Value for the key.
     */
    get(key: K): V | undefined;
    /**
     * Get the value for a key from this map or insert the default value.
     *
     * @param key Key to get.
     * @param defaultValue Default value.
     * @returns Value for the key.
     */
    getOrInsert(key: K, defaultValue: V): V;
    /**
     * Get the value for a key from this map or insert computed default value.
     *
     * @param key Key to get.
     * @param callback Compute the default value.
     * @returns Value for the key.
     */
    getOrInsertComputed(key: K, callback: (key: K) => V): V;
    /**
     * Has a key in this map.
     *
     * @param key Key to check.
     * @returns Whether the key is in this map.
     */
    has(key: K): boolean;
    /**
     * Iterator for keys in this map.
     *
     * @returns Key iterator.
     */
    keys(): MapIterator<K>;
    /**
     * Set a value for a key in this map.
     *
     * @param key Key to set.
     * @param value Value to set.
     * @returns This map.
     */
    set(key: K, value: V): this;
    /**
     * The number of keys in this map.
     * Can be greater than number of active keys.
     */
    get size(): number;
    /**
     * Iterator for values in this map.
     *
     * @returns Value iterator.
     */
    values(): MapIterator<V>;
}
/**
 * Readonly MeekMap.
 *
 * @template K Key type.
 * @template V Value type.
 */
export type ReadonlyMeekMap<K extends WeakKey = WeakKey, V = any> = Omit<MeekMap<K, V>, 'clear' | 'delete' | 'getOrInsert' | 'getOrInsertComputed' | 'set'>;
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