/**
 * @fileoverview Custom PurlError class for Package URL parsing and validation errors.
 * Provides consistent error message formatting for PURL-related exceptions.
 */
/**
 * Format error message for PURL exceptions.
 */
declare function formatPurlErrorMessage(message?: string): string;
/**
 * Custom error class for Package URL parsing and validation failures.
 */
declare class PurlError extends Error {
    constructor(message?: string | undefined, options?: ErrorOptions | undefined);
}
/**
 * Specialized error for injection character detection.
 * Developers can catch this specifically to distinguish injection rejections
 * from other PURL validation errors and handle them at an elevated level
 * (e.g., logging, alerting, blocking).
 *
 * Properties:
 * - `component` — which PURL component was rejected ("name", "namespace")
 * - `charCode` — the character code of the injection character found
 * - `purlType` — the package type (e.g., "npm", "maven")
 */
declare class PurlInjectionError extends PurlError {
    readonly charCode: number;
    readonly component: string;
    readonly purlType: string;
    constructor(purlType: string, component: string, charCode: number, charLabel: string);
}
export { formatPurlErrorMessage, PurlError, PurlInjectionError };