import { Task } from '../task';
import { Stream } from '@andyfischer/streams';
export type TaskCallback = (task: Task) => Stream;
export interface HandlerTag {
    attr: string;
    isParameter: boolean;
    isRequired?: boolean;
    requiresValue?: boolean;
    assumeInclude?: boolean;
    isOutput?: boolean;
    expectedType?: 'integer' | 'boolean' | 'string';
    isPositional?: boolean;
}
export declare class Handler {
    t: string;
    tags: HandlerTag[];
    run: TaskCallback;
    primaryAttr?: string;
    byAttr: Map<string, number>;
    frozen: boolean;
    constructor(tags: HandlerTag[]);
    setCallback(callback: TaskCallback): void;
    freeze(): void;
    compile(): void;
    hasAttr(attr: string): boolean;
    requiresAttr(attr: string): boolean;
    requiresValue(attr: string): boolean;
    getTag(attr: string): HandlerTag;
    without(attr: string): Handler;
    withParameter(attr: string): Handler;
    addTag(tag: HandlerTag): Handler;
    withCallback(callback: TaskCallback): Handler;
    getParamAttrs(): string[];
    toDeclString(): string;
}