import { VNode, VNodeRepresentationSource } from "./vnode";
import { UnionInput, UnionOptions } from "@virtualstate/union";
import type { CreateNodeFn } from "./create-node";
import { ChildrenSource, ChildrenSourceFunction } from "./source";
export interface VNodeChildren<N extends VNode = VNode> extends AsyncIterable<N[]> {
    /**
     * @experimental
     */
    [Symbol.iterator]?(): Iterator<N>;
    /**
     * @experimental
     */
    [ChildrenSource]?: Iterable<VNodeRepresentationSource>;
    /**
     * @experimental
     */
    [ChildrenSourceFunction]?(): AsyncIterable<VNode[]>;
    /**
     * @experimental
     */
    [ChildrenOptions]?: ChildrenTransformOptions;
    /**
     * @experimental
     */
    then?: PromiseLike<VNode[]>["then"];
}
export interface ProxyNodeFn {
    <T extends VNode>(input: T): T | undefined;
    (input: VNode): VNode | undefined;
}
/**
 * @experimental
 */
export interface ChildrenTransformOptions extends UnionOptions {
    createNode: CreateNodeFn;
    /**
     * Allows replacement of children node instances
     *
     * Warning, usage can break expected types, source, options, and children structures
     * in typed contexts expect to be the same when returned.
     */
    proxyNode?: ProxyNodeFn;
}
/**
 * @experimental
 */
export declare const ChildrenOptions: unique symbol;
export declare function childrenUnion<N extends VNode>(context: UnionOptions, childrenGroups: UnionInput<N[]>): AsyncIterable<N[]>;
export declare function children(givenContext: ChildrenTransformOptions, ...source: VNodeRepresentationSource[]): AsyncIterable<VNode[]>;
/**
 * @internal
 * @experimental
 */
export declare function flattenChildrenSourceRepresentation(source: Iterable<VNodeRepresentationSource>): Iterable<VNodeRepresentationSource>;
/**
 * @experimental
 */
export declare function flattenChildrenSource(context: ChildrenTransformOptions, source: Iterable<VNodeRepresentationSource>): Iterable<VNode>;
/**
 * @experimental
 */
export declare function isChildrenOptions(node: unknown): node is {
    [ChildrenOptions]: ChildrenTransformOptions;
};
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