import { OpaqueToken } from 'angular2/core';

import * as modelModule from './model';

import { ValidatorFn, AsyncValidatorFn } from './directives/validators';

/**

* Providers for validators to be used for {@link Control}s in a form.

*

* Provide this using `multi: true` to add validators.

*

* ### Example

*

* {@example core/forms/ts/ng_validators/ng_validators.ts region='ng_validators'}

*/

export declare const NG_VALIDATORS: OpaqueToken;

/**

* Providers for asynchronous validators to be used for {@link Control}s

* in a form.

*

* Provide this using `multi: true` to add validators.

*

* See {@link NG_VALIDATORS} for more details.

*/

export declare const NG_ASYNC_VALIDATORS: OpaqueToken;

/**

* Provides a set of validators used by form controls.

*

* A validator is a function that processes a {@link Control} or collection of

* controls and returns a map of errors. A null map means that validation has passed.

*

* ### Example

*

* ```typescript

* var loginControl = new Control("", Validators.required)

* ```

*/

export declare class Validators {

/**

* Validator that requires controls to have a non-empty value.

*/

static required(control: modelModule.AbstractControl): {

[key: string]: boolean;

};

/**

* Validator that requires controls to have a value of a minimum length.

*/

static minLength(minLength: number): ValidatorFn;

/**

* Validator that requires controls to have a value of a maximum length.

*/

static maxLength(maxLength: number): ValidatorFn;

/**

* Validator that requires a control to match a regex to its value.

*/

static pattern(pattern: string): ValidatorFn;

/**

* No-op validator.

*/

static nullValidator(c: modelModule.AbstractControl): {

[key: string]: boolean;

};

/**

* Compose multiple validators into a single function that returns the union

* of the individual error maps.

*/

static compose(validators: ValidatorFn[]): ValidatorFn;

static composeAsync(validators: AsyncValidatorFn[]): AsyncValidatorFn;

}