/**
 * Splits a string into words on case boundaries and non-alphanumeric separators.
 * Uses Unicode property escapes so CJK and other letters are preserved.
 *
 * @param {string} string_ - Input string
 * @param {RegExp} [pattern] - Custom matching pattern; defaults to a Unicode word matcher
 * @returns {string[]} Array of words
 * @example
 * words("helloWorld foo-bar"); // ["hello", "World", "foo", "bar"]
 * words("XMLHttpRequest"); // ["XML", "Http", "Request"]
 */
export declare const words: (string_: string, pattern?: RegExp) => string[];