/*!
 * @author electricessence / https://github.com/electricessence/
 * Licensing: MIT https://github.com/electricessence/TypeScript.NET-Core/blob/master/LICENSE.md
 */
import Primitive from "./Primitive";
import IComparable from "./IComparable";
import CompareResult from "./CompareResult";
/**
 * Used for special comparison including NaN.
 * @param a
 * @param b
 * @param strict
 * @returns {boolean|any}
 */
export declare function areEqual(a: any, b: any, strict?: boolean): boolean;
/**
 * Compares two comparable objects or primitives.
 * @param a
 * @param b
 */
export declare function compare<T>(a: IComparable<T>, b: IComparable<T>): number;
export declare function compare<T extends Primitive>(a: T, b: T, strict?: boolean): CompareResult;
/**
 * Determines if two primitives are equal or if two objects have the same key/value combinations.
 * @param a
 * @param b
 * @param nullEquivalency If true, null/undefined will be equivalent to an empty object {}.
 * @param extraDepth
 * @returns {boolean}
 */
export declare function areEquivalent(a: any, b: any, nullEquivalency?: boolean, extraDepth?: number): boolean;