export type AnyErrorClassConstructor = new (...args: any[]) => Error;
export type SpecificErrorClassConstructor<ErrorInstance extends Error> = new (...args: any[]) => Error & ErrorInstance;
/**
 * An internal symbol used to track class metadata.
 */
export declare const $kind: unique symbol;
/**
 * Additional properties exposed as static properties of named error classes.
 */
export type NamedErrorConstructorStaticProperties<ErrorInstance extends Error> = {
  /**
   * A reference to this class's `isX` function originally returned by
   * {@link makeNamedError}.
   */
  isError: (parameter: unknown) => parameter is Error & ErrorInstance;
};
/**
 * Returns `true` if `parameter` is _an instance of_ an {@link Error} subclass
 * created using {@link makeNamedError}.
 */
export declare function isANamedErrorInstance(parameter: unknown): parameter is Error;
/**
 * Returns `true` if `parameter` is an {@link Error} subclass (_not an
 * instance_) created using {@link makeNamedError}.
 *
 * **This function is NOT for match instances, but actual classes extending
 * {@link Error}!**
 */
export declare function isANamedErrorClass(parameter: unknown): parameter is AnyErrorClassConstructor & NamedErrorConstructorStaticProperties<Error>;
/**
 * This function accepts a class extending {@link Error} and assigns it a name
 * that will survive minification/transpilation, improving DX.
 *
 * Along with the error itself, this function returns the `is${name}` helper
 * function and the `$kind_${name}` symbol, both of which can be used to
 * identify instances of the class without resorting to `instanceof`, which has
 * some caveats (e.g. realms).
 *
 * Note that all errors will have a non-own "name" property injected into their
 * prototype chain for improved DX.
 */
export declare function makeNamedError<ErrorClass extends AnyErrorClassConstructor, const Name extends string>(ErrorClass: ErrorClass, name: Name): { [key in `$kind_${Name}`]: symbol } & { [key in Name]: SpecificErrorClassConstructor<InstanceType<ErrorClass>> & NamedErrorConstructorStaticProperties<InstanceType<ErrorClass>> } & { [key in `is${Name}`]: (parameter: unknown) => parameter is InstanceType<ErrorClass> };