import { Validator, AbstractControl } from '@angular/forms';
import * as i0 from "@angular/core";
export declare class ExpressionValidator implements Validator {
    /** 条件表达式 */
    expression: string[] | string;
    validate(control: AbstractControl): {
        [key: string]: any;
    };
    static ɵfac: i0.ɵɵFactoryDeclaration<ExpressionValidator, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<ExpressionValidator, "[expression]", never, { "expression": "expression"; }, {}, never>;
}