import { Pred2 } from '../typings/types';
interface Comparator {
    <T>(pred: Pred2<T, T>): (x: T, y: T) => -1 | 0 | 1;
}
/**
 * Makes a comparator function out of a function that reports whether the first
 * element is less than the second.
 *
 * @param {Function} pred A predicate function of arity two which will return `true` if the first argument
 * is less than the second, `false` otherwise
 * @return {Function} A Function :: a -> b -> Int that returns `-1` if a < b, `1` if b < a, otherwise `0`
 * @example
 *
 *      var byAge = comparator((a, b) => a.age < b.age);
 *      var people = [
 *        // ...
 *      ];
 *      var peopleByIncreasingAge = sort(byAge, people);
 */
declare const _default: Comparator;
export default _default;