import * as i0 from '@angular/core';
import { InjectionToken, PipeTransform } from '@angular/core';
import { ValidationErrors } from '@angular/forms';

type ErrorMessageResolver = (errors: ValidationErrors) => string;
declare const ERROR_MESSAGE_RESOLVER: InjectionToken<ErrorMessageResolver>;
declare const defaultErrorMessageResolver: ErrorMessageResolver;
declare function provideErrorMessageResolver(resolver: ErrorMessageResolver): {
    provide: InjectionToken<ErrorMessageResolver>;
    useValue: ErrorMessageResolver;
};
declare function injectErrorMessageResolver(): ErrorMessageResolver;
declare class ErrorPipe implements PipeTransform {
    protected resolver: ErrorMessageResolver;
    transform(errors: ValidationErrors): string;
    static ɵfac: i0.ɵɵFactoryDeclaration<ErrorPipe, never>;
    static ɵpipe: i0.ɵɵPipeDeclaration<ErrorPipe, "error", true>;
}

export { ERROR_MESSAGE_RESOLVER, ErrorPipe, defaultErrorMessageResolver, injectErrorMessageResolver, provideErrorMessageResolver };
export type { ErrorMessageResolver };