import { Document } from '../collection.js';
export type Modifier<T> = {
    $set?: Partial<T>;
    $unset?: Partial<Record<keyof T, true>>;
    $push?: Arrays<T>;
    $pull?: Arrays<T>;
    $inc?: Numbers<T>;
    $min?: Numbers<T>;
    $max?: Numbers<T>;
    $mul?: Numbers<T>;
    $setOnInsert?: Partial<T>;
    $addToSet?: Arrays<T>;
};
type Numbers<T> = {
    [K in keyof T as T[K] extends number ? K : never]?: number;
};
type Arrays<T> = {
    [K in keyof T as T[K] extends any[] ? K : never]?: T[K] extends (infer U)[] ? U : never;
};
export declare function applyModifier<TDoc extends Document>(doc: TDoc, mod: Modifier<TDoc>, ctx?: {
    inserting?: boolean;
}): TDoc;
export {};