import { CanonicalLike, CanonicalLogicalTypes, ICanonical } from '@darlean/canonical';
import { CanonicalFieldName } from './valueobject';
export declare const VALIDATORS = "validators";
export declare const LOGICAL_TYPES = "logical=types";
export type Class<T> = {
    new (...args: any[]): T;
    name: string;
};
export type ValidatorFunc<T = unknown> = (value: T, fail: (msg: string) => void) => void;
export declare function required<T>(clazz: Class<T>): T;
export declare function optional<T>(clazz: Class<T>): T | undefined;
export type MethodKeys<T> = {
    [K in keyof T]: T[K] extends Function ? K : never;
}[keyof T];
export declare function valueobject(logicalType?: string): (constructor: Function) => void;
export declare function validation<T>(validator: (value: T) => string | boolean | void, description?: string): (constructor: Function) => void;
export interface IValueOptions {
    cacheCanonical?: boolean;
    value?: unknown;
    canonical?: CanonicalLike;
}
export interface IFromCanonicalOptions {
    cacheCanonical?: boolean;
}
export declare class Value {
    constructor(_options: IValueOptions);
    get _logicalTypes(): CanonicalLogicalTypes;
    equals(_other: unknown): boolean;
    static get logicalTypes(): CanonicalLogicalTypes;
}
export declare function constructValue<T>(clazz: Class<T>, options: IValueOptions): T;
export type ValueClass<TValue extends Value = Value> = Class<TValue> & {
    get logicalTypes(): CanonicalLogicalTypes;
};
export type ValueClassLike<TValue extends Value = Value> = ValueClass<TValue> | (() => ValueClass<TValue>);
export declare function toValueClass<T extends ValueClassLike<TValue>, TValue extends Value = T extends ValueClassLike<infer X> ? X : never>(v: T): ValueClass<TValue>;
export declare function aExtendsB(a: CanonicalFieldName[], b: CanonicalFieldName[]): boolean;
export declare function shouldCacheCanonical(canonical: ICanonical, expectedTypes: CanonicalLogicalTypes, cacheCanonical: boolean | undefined): boolean;
export declare function checkLogicalTypes(proto: Object): CanonicalLogicalTypes;