import { BaseError } from 'make-error';
import { Constrained, Rule } from '../../core';
export declare class InvalidNumberAsStringError extends BaseError {
    constructor();
}
export declare const numberAsStringSymbol: unique symbol;
export type NumberAsString = Constrained<typeof numberAsStringSymbol, string>;
export declare function isNumberAsString(input: unknown): input is NumberAsString;
export declare function sanitizeNumberFromString<T>(numberRule: Rule<T>): (input: unknown) => T;