/**
 * Converts an MQTT topic filter into a regular expression according to the MQTT specification.
 *
 * This utility escapes standard regex characters to prevent injection or unexpected behavior,
 * and then converts the native MQTT wildcards into their regex equivalents:
 * - `+` (single-level wildcard) becomes `[^/]+` (matches one or more characters except a forward slash)
 * - `#` (multi-level wildcard) becomes an optional matching group `(?:/.*)?` to correctly handle parent levels.
 *
 * @param topicFilter - The MQTT topic filter string to convert (e.g., "home/+/temperature" or "clients/#").
 * @returns A `RegExp` object configured to match topics corresponding to the filter.
 *
 * @example
 * ```typescript
 * const regex = topicFilterToRegExp("home/+/temperature");
 * regex.test("home/livingroom/temperature"); // true
 * regex.test("home/kitchen/lights");        // false
 * ```
 */
export declare function topicFilterToRegExp(topicFilter: string): RegExp;
/**
 * Parses a Topic filter for a "shared subscription" into the share name and the regular Topic Filter
 *
 * @param topicFilter - The MQTT topic filter string to parse (e.g. "$share/sharename/rest/of/topic/filter")).
 * @returns an object that contains the regular topicFilter and he share name (if present)
 */
export declare function parseTopicFilter(topicFilter: string): {
    topicFilter: string;
    shareName: string;
};
/** the inverse of parseTopicFilter */
export declare function joinTopicFilter(topicFilter: string, shareName: string): string;
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