import { type Caster, type UndefinedAsOptional } from './types.js';
export declare const json: Caster<unknown> & {
    object: Caster<Record<string, unknown>>;
    struct: <T extends Record<string, any>>(casters: { [K in keyof T]: Caster<T[K]>; }, name?: string) => Caster<UndefinedAsOptional<T>>;
    array: <T>(caster: Caster<T>, name?: string) => Caster<T[]>;
};
export declare const jsonObject: Caster<Record<PropertyKey, unknown>>;
export declare const jsonStruct: <T extends Record<string, any>>(casters: { [K in keyof T]: Caster<T[K]>; }, name?: string) => Caster<UndefinedAsOptional<T>>;
export declare const jsonArray: <T>(caster: Caster<T>, name?: string) => Caster<T[]>;