import type { AttributeToken } from 'pug-lexer';
import type { SortAttributesBeginningOption, SortAttributesEndOption, SortAttributesOption } from './types';
/** Compare result. */
declare type CompareResult = -1 | 0 | 1;
/** Compare function. */
declare type CompareFunction<T> = (a: T, b: T) => CompareResult;
/**
 * Compare two attributes with each other.
 *
 * @param a An attribute token.
 * @param b An attribute token.
 * @param sortAttributes How to sort attributes.
 * @param sortAttributesBeginning Attributes that should sorted to the beginning.
 * @param sortAttributesEnd Attributes that should sorted to the end.
 * @returns The compare result.
 */
export declare function compareAttributeToken(a: AttributeToken, b: AttributeToken, sortAttributes: SortAttributesOption, sortAttributesBeginning: SortAttributesBeginningOption, sortAttributesEnd: SortAttributesEndOption): CompareResult;
/**
 * Sort an array with a given compare function.
 *
 * @param array The array to sort.
 * @param compare A function for comparing the values.
 * @returns The sorted array.
 */
export declare function stableSort<T>(array: ReadonlyArray<T>, compare: CompareFunction<T>): T[];
/**
 * Partially sorts an array.
 *
 * @param arr The array to sort.
 * @param start The start from where to sort.
 * @param end The end to where to sort.
 * @param compareFn A function for comparing the values.
 * @returns The sorted array.
 */
export declare function partialSort<T>(arr: ReadonlyArray<T>, start: number, end: number, compareFn: CompareFunction<T>): T[];
export {};