/**
 * @license
 * Copyright 2017 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
export type Comparator<K> = (key1: K, key2: K) => number;
export interface Entry<K, V> {
    key: K;
    value: V;
}
export declare class SortedMap<K, V> {
    comparator: Comparator<K>;
    root: LLRBNode<K, V> | LLRBEmptyNode<K, V>;
    constructor(comparator: Comparator<K>, root?: LLRBNode<K, V> | LLRBEmptyNode<K, V>);
    insert(key: K, value: V): SortedMap<K, V>;
    remove(key: K): SortedMap<K, V>;
    get(key: K): V | null;
    indexOf(key: K): number;
    isEmpty(): boolean;
    get size(): number;
    minKey(): K | null;
    maxKey(): K | null;
    inorderTraversal<T>(action: (k: K, v: V) => T): T;
    forEach(fn: (k: K, v: V) => void): void;
    toString(): string;
    reverseTraversal<T>(action: (k: K, v: V) => T): T;
    getIterator(): SortedMapIterator<K, V>;
    getIteratorFrom(key: K): SortedMapIterator<K, V>;
    getReverseIterator(): SortedMapIterator<K, V>;
    getReverseIteratorFrom(key: K): SortedMapIterator<K, V>;
}
export declare class SortedMapIterator<K, V> {
    private isReverse;
    private nodeStack;
    constructor(node: LLRBNode<K, V> | LLRBEmptyNode<K, V>, startKey: K | null, comparator: Comparator<K>, isReverse: boolean);
    getNext(): Entry<K, V>;
    hasNext(): boolean;
    peek(): Entry<K, V> | null;
}
export declare class LLRBNode<K, V> {
    key: K;
    value: V;
    readonly color: boolean;
    readonly left: LLRBNode<K, V> | LLRBEmptyNode<K, V>;
    readonly right: LLRBNode<K, V> | LLRBEmptyNode<K, V>;
    readonly size: number;
    static EMPTY: LLRBEmptyNode<any, any>;
    static RED: boolean;
    static BLACK: boolean;
    constructor(key: K, value: V, color?: boolean, left?: LLRBNode<K, V> | LLRBEmptyNode<K, V>, right?: LLRBNode<K, V> | LLRBEmptyNode<K, V>);
    copy(key: K | null, value: V | null, color: boolean | null, left: LLRBNode<K, V> | LLRBEmptyNode<K, V> | null, right: LLRBNode<K, V> | LLRBEmptyNode<K, V> | null): LLRBNode<K, V>;
    isEmpty(): boolean;
    inorderTraversal<T>(action: (k: K, v: V) => T): T;
    reverseTraversal<T>(action: (k: K, v: V) => T): T;
    private min;
    minKey(): K | null;
    maxKey(): K | null;
    insert(key: K, value: V, comparator: Comparator<K>): LLRBNode<K, V>;
    private removeMin;
    remove(key: K, comparator: Comparator<K>): LLRBNode<K, V> | LLRBEmptyNode<K, V>;
    isRed(): boolean;
    private fixUp;
    private moveRedLeft;
    private moveRedRight;
    private rotateLeft;
    private rotateRight;
    private colorFlip;
    checkMaxDepth(): boolean;
    protected check(): number;
}
export declare class LLRBEmptyNode<K, V> {
    get key(): never;
    get value(): never;
    get color(): never;
    get left(): never;
    get right(): never;
    size: number;
    copy(key: K | null, value: V | null, color: boolean | null, left: LLRBNode<K, V> | LLRBEmptyNode<K, V> | null, right: LLRBNode<K, V> | LLRBEmptyNode<K, V> | null): LLRBEmptyNode<K, V>;
    insert(key: K, value: V, comparator: Comparator<K>): LLRBNode<K, V>;
    remove(key: K, comparator: Comparator<K>): LLRBEmptyNode<K, V>;
    isEmpty(): boolean;
    inorderTraversal(action: (k: K, v: V) => boolean): boolean;
    reverseTraversal(action: (k: K, v: V) => boolean): boolean;
    minKey(): K | null;
    maxKey(): K | null;
    isRed(): boolean;
    checkMaxDepth(): boolean;
    protected check(): 0;
}