/// <amd-module name="nova_ecs/system" />
import { ArgsToData, ArgTypes } from "./arg_types";
import { EcsEvent, UnknownEvent } from "./events";
import { Query } from "./query";
export interface BaseSystemArgs<StepArgTypes extends readonly ArgTypes[]> {
    readonly name: string;
    readonly args: StepArgTypes;
    readonly before?: Iterable<System | string>;
    readonly after?: Iterable<System | string>;
    readonly events?: Iterable<EcsEvent<any, any>>;
}
export interface SystemArgs<StepArgTypes extends readonly ArgTypes[]> extends BaseSystemArgs<StepArgTypes> {
    step: (...args: ArgsToData<StepArgTypes>) => void;
}
export declare class System<StepArgTypes extends readonly ArgTypes[] = readonly ArgTypes[]> {
    readonly name: string;
    readonly args: StepArgTypes;
    readonly step: SystemArgs<StepArgTypes>['step'];
    readonly before: ReadonlySet<System | string>;
    readonly after: ReadonlySet<System | string>;
    readonly events: Set<UnknownEvent>;
    readonly query: Query<StepArgTypes>;
    constructor({ name, args, step, before, after, events }: SystemArgs<StepArgTypes>);
    toString(): string;
}