import { IDecorator } from "oly";
import { IField, IType } from "../interfaces";
export declare class FieldDecorator implements IDecorator {
    private readonly options;
    constructor(options?: Partial<IField> | IType);
    asProperty(target: object, propertyKey: string): void;
    asParameter(target: object, propertyKey: string, index: number): void;
}
/**
 * ```ts
 * class Embedded {
 *   @field title: string;
 * }
 *
 * class Data {
 *   @field firstName: string;
 *   @field lastName: string;
 *   @field age: number;
 *   @field something: Embedded;
 * }
 * ```
 *
 * ### JSON Schema
 *
 * ```ts
 * class Data {
 *
 *   @field({
 *     // json-schema options like minLength, ...
 *     // "required" is also available
 *   })
 *   propertyKey: string;
 * }
 *
 * json.schema(Data); // {properties: {...
 * ```
 *
 * ### Type
 *
 * Mapping requires a "Type", most of the time TypeScript type annotations are enough.
 *
 * Exceptions:
 * - array (see @array)
 * - native type (see @date)
 *
 * ### Required by default
 *
 * Like a Typescript property, **a @field property is required by default**.
 *
 * ```ts
 * class A {
 *   @field({required: false}) myProperty?: string; // now it's optional
 * }
 * ```
 */
export declare const field: ((data?: Function | Partial<IField> | undefined, p?: string | undefined, i?: number | undefined) => (data?: object | Function | undefined, p?: string | undefined, i?: number | TypedPropertyDescriptor<any> | undefined) => any) & ((data?: object | Function | undefined, p?: string | undefined, i?: number | TypedPropertyDescriptor<any> | undefined) => any);