import { IComparer, IEqualityComparer } from './_types';
/**
 * Compares objects of the same type using a custom selector and
 * a comparer for the selector's return value.
 */
export default class MapComparer<T, TProperty> implements IComparer<T>, IEqualityComparer<T> {
    #private;
    constructor(selector: (a: T) => TProperty, comparer: IComparer<TProperty>);
    compare(x: T, y: T): number;
    equals(x: T, y: T): boolean;
    greaterThan(x: T, y: T): boolean;
    greaterThanOrEqual(x: T, y: T): boolean;
    lessThan(x: T, y: T): boolean;
    lessThanOrEqual(x: T, y: T): boolean;
}