export declare type ValidatorFn = (text: string, option?: any) => boolean;
/**
 * A container class used to hold validation code.  Creating an instance
 * of this class guarantees that the validation function, success, and failure
 * information is available in the instance.  The validator is then used
 * by a TextField control to call the validation routine within the class.
 *
 * #### Examples:
 *
 * ```javascript
 * import {Validator} from 'gadgets';
 *
 * const x = new Validator(
 *     (value: string) => {
 *         return true;
 *     },
 *     'failure',
 *     'success'
 * );
 * ```
 *
 * The function passed to the `Validator` class returns a boolean value.
 * If true is returned, then the validation call is successful, otherwise
 * validation has failed.  The success/failure messages are associated
 * with this validation routine and can be used to prompt with validation
 * info for this object.
 *
 * These instances are passed to the `validators` array list property on the
 * `TextField` control.  The `TextField` calls the `validate()`, with
 * the input data to determine, if the current state of that data is
 * valid.  This validators array can hold multiple instances of these
 * validation classes (generally different validations).  The validation
 * routine in the `TextField` will iterate through this array and use
 * the function and success/failure to perform this validation.
 *
 */
export declare class Validator {
    private _failure;
    private _success;
    constructor(fn: ValidatorFn, failure: string, success?: string);
    readonly failure: string;
    readonly success: string;
    validate: ValidatorFn;
}
export declare function validateMaxLength(length: number): Validator;
export declare function validateMinLength(length: number): Validator;
export declare function validateEmail(): Validator;
export declare function validateURL(): Validator;
export declare function validateRegex(regex?: RegExp): Validator;