import { ComparerFunction } from "../collections/comparison";
/**
 * Sorts the specified array in-place.
 * This function intends to implement stable sort.
 *
 * @param array the array to get sorted.
 * @param comparer an optional callback used to compare the elements.
 *        `undefined` elements will be passed in to it nevertheless.
 *
 * @todo Implement this function without `Array.sort` -- it is too tricky and might be slow.
 */
export declare function sort<T>(array: T[], comparer?: ComparerFunction<T>): void;
/**
 * Provides default implementation for sorting JS arrays.
 *
 * @remarks
 * The implementation sorts the array with the following order
 * * undefined
 * * null
 * * boolean (false, true)
 * * number / bigint
 * * string
 * * object
 *
 * `object`s of the same type are compared with the comparer function retrieved from {@link getComparer}.
 * Attempting to compare other primitive types, or object types that are yet to be registered (with {@link registerComparer})
 * will cause {@link InvalidOperationError}.
 */
export declare function defaultArrayComparer(x: unknown, y: unknown): number;
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