import type { IDisposable } from "@surface/core";
import type { DirectiveEntry } from "../../types/index";
import type Block from "../block.js";
import type Expression from "../types/expression.js";
import type Factory from "../types/fatctory.js";
import type ObservablePath from "../types/observable-path.js";
declare type Context = {
    block: Block;
    directives: Map<string, DirectiveEntry>;
    factory: Factory;
    host: Node;
    key: Expression<string>;
    observables: [key: ObservablePath[], value: ObservablePath[]];
    parent: Node;
    scope: object;
    value: Expression;
};
export default class PlaceholdeStatement 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 {};