import type { SSRResult } from '../../../@types/astro.js';
import type { RenderInstruction } from './instruction.js';
import type { HTMLBytes, HTMLString } from '../escape.js';
import { type SlotString } from './slot.js';
/**
 * Possible chunk types to be written to the destination, and it'll
 * handle stringifying them at the end.
 *
 * NOTE: Try to reduce adding new types here. If possible, serialize
 * the custom types to a string in `renderChild` in `any.ts`.
 */
export type RenderDestinationChunk = string | HTMLBytes | HTMLString | SlotString | ArrayBufferView | RenderInstruction | Response;
export interface RenderDestination {
    /**
     * Any rendering logic should call this to construct the HTML output.
     * See the `chunk` parameter for possible writable values.
     */
    write(chunk: RenderDestinationChunk): void;
}
export interface RenderInstance {
    render: RenderFunction;
}
export type RenderFunction = (destination: RenderDestination) => Promise<void> | void;
export declare const Fragment: unique symbol;
export declare const Renderer: unique symbol;
export declare const encoder: TextEncoder;
export declare const decoder: TextDecoder;
export declare function chunkToString(result: SSRResult, chunk: Exclude<RenderDestinationChunk, Response>): string;
export declare function chunkToByteArray(result: SSRResult, chunk: Exclude<RenderDestinationChunk, Response>): Uint8Array;
export declare function isRenderInstance(obj: unknown): obj is RenderInstance;