import type { IDisposable } from "@surface/core";
import type { ObservablePath, StackTrace } from "@surface/htmlx-parser";
import type DirectiveEntry from "../types/directive-entry.js";
import type Evaluator from "../types/evaluator.js";
import type NodeFactory from "../types/node-factory.js";
import type Block from "./block.js";
type Context = {
    block: Block;
    directives: Map<string, DirectiveEntry>;
    factory: NodeFactory;
    host: Node;
    key: Evaluator;
    observables: [key: ObservablePath[], value: ObservablePath[]];
    parent: Node;
    scope: object;
    value: Evaluator;
    source?: {
        key: string;
        scope: string;
    };
    stackTrace?: StackTrace;
};
export default class PlaceholderDirective implements IDisposable {
    private readonly context;
    private readonly cancellationTokenSource;
    private readonly keySubscription;
    private readonly metadata;
    private currentDisposable;
    private disposed;
    private key;
    private lazyInjectionCancellationTokenSource;
    private subscription;
    private injectionContext?;
    constructor(context: Context);
    private readonly applyInjection;
    private readonly applyLazyInjection;
    private readonly inject;
    private readonly onKeyChange;
    private readonly task;
    private readonly defaultTask;
    dispose(): void;
}
export {};