import { StringRuleChecker } from './string-rule-checker';
import { TrimmedSide } from './string-types';
import { GuardResult } from '../../core/guard-result';
/**
 * Leading whitespace pattern.
 */
export declare const LEADING_WHITESPACE_PATTERN = "^\\s";
/**
 * Trailing whitespace pattern.
 */
export declare const TRAILING_WHITESPACE_PATTERN = "\\s$";
export declare class StringIsTrimmed extends StringRuleChecker<{
    type: 'isTrimmed';
    side: TrimmedSide;
}> {
    constructor(rule: {
        type: 'isTrimmed';
        side: TrimmedSide;
    }, value: string);
    /**
     * @override
     */
    exec(): GuardResult;
    private isTrimmed;
    private isLeftTrimmed;
    private isRightTrimmed;
}