import { StringRuleChecker } from './string-rule-checker';
import { IIsDecimalOptions } from './string-options';
import { GuardResult } from '../../core/guard-result';
/**
 * Decimal pattern.
 */
export declare const DECIMAL_PATTERN = "^[-]?\\d+(([.,]{1}\\d+)|(\\d*))$";
export declare class StringIsDecimal extends StringRuleChecker<{
    type: 'isDecimal';
    options?: IIsDecimalOptions;
}> {
    constructor(rule: {
        type: 'isDecimal';
        options?: IIsDecimalOptions;
    }, value: string);
    exec(): GuardResult;
    private isDecimal;
    private hasDecimalSeparator;
    private calculatePrecision;
}