import type { ParjsCombinator } from "../parjser";
/** The type of an arbitrarily nested array or a non-array element. */
export type NestedArray<T> = T | NestedArray<T>[];
/**
 * Applies the source parser and projects its result into a flat array - an array with non-array
 * elements.
 */
export declare function flatten<T>(): ParjsCombinator<NestedArray<T>, T[]>;
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