import * as React from 'react';
import type { TagFunction } from './index';
/**
 * Replaces matching patterns in a string with markers.
 *
 * @param content The content to parse and mark.
 *
 * @param rule The pattern to search and replace in the content.
 *
 * @param tag A function that takes the match string and must return
 * a React component or a string. The value returned by that function will
 * replace the term in the output.
 *
 * @param matchIndex The index of the match to use when marking with
 * a RegExp. If not provided, will use the last non-null match available.
 *
 * @returns An array of strings and components,
 * similar to the original content but where each matching pattern has been
 * replaced by a marking component.
 */
export declare function markRegExp(content: string, rule: RegExp, tag: TagFunction, matchIndex?: number): React.ReactNode[];