import type { JsonOutputBudget } from "./json-output-budget.js";
import type { JsonBudget, JsonObject, JsonValue } from "./json-value.js";
export type JsonProducer = (path: string, depth: number) => JsonValue;
export type JsonField = readonly [string, JsonProducer];
export type JsonOutputFactory = (nodes: JsonBudget, byteError?: string) => JsonOutput;
/** Materializes lazy JSON fields only after their container and key fit the budget. */
export declare class JsonOutput {
    private readonly budget;
    constructor(budget: JsonOutputBudget);
    measure(value: JsonValue, path: string): number;
    copy(value: JsonValue, path: string, depth?: number): JsonValue;
    object(fields: Iterable<JsonField>, path: string, depth: number): JsonObject;
    array(items: Iterable<JsonProducer>, path: string, depth: number): JsonValue[];
    formatted(parts: Iterable<string>, render: () => string, path: string, depth: number): string;
    private fields;
    private items;
}
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