@types/verror/index.d.ts

/*
 * VError([cause], fmt[, arg...]): Like JavaScript's built-in Error class, but
 * supports a "cause" argument (another error) and a printf-style message.  The
 * cause argument can be null or omitted entirely.
 *
 * Examples:
 *
 * CODE                                    MESSAGE
 * new VError('something bad happened')    "something bad happened"
 * new VError('missing file: "%s"', file)  "missing file: "/etc/passwd"
 *   with file = '/etc/passwd'
 * new VError(err, 'open failed')          "open failed: file not found"
 *   with err.message = 'file not found'
 */
declare class VError extends Error {
    static VError: typeof VError;

    static cause(err: Error): Error | null;
    static info(err: Error): VError.Info;
    static fullStack(err: Error): string;
    static findCauseByName(err: Error, name: string): Error | null;
    static hasCauseWithName(err: Error, name: string): boolean;
    static errorFromList<T extends Error>(errors: T[]): null | T | VError.MultiError;
    static errorForEach(err: Error, func: (err: Error) => void): void;

    cause: () => Error | undefined;
    constructor(options: VError.Options | Error, message: string, ...params: any[]);
    constructor(message?: string, ...params: any[]);
}

declare namespace VError {
    interface Info {
        [key: string]: any;
    }

    interface Options {
        cause?: Error | null | undefined;
        name?: string | undefined;
        strict?: boolean | undefined;
        constructorOpt?(...args: any[]): void;
        info?: Info | undefined;
    }

    /*
     * SError is like VError, but stricter about types.  You cannot pass "null" or
     * "undefined" as string arguments to the formatter.  Since SError is only a
     * different function, not really a different class, we don't set
     * SError.prototype.name.
     */
    class SError extends VError {}

    /*
     * Represents a collection of errors for the purpose of consumers that generally
     * only deal with one error.  Callers can extract the individual errors
     * contained in this object, but may also just treat it as a normal single
     * error, in which case a summary message will be printed.
     */
    class MultiError extends VError {
        constructor(errors: Error[]);
        errors(): Error[];
    }

    /*
     * Like JavaScript's built-in Error class, but supports a "cause" argument which
     * is wrapped, not "folded in" as with VError.    Accepts a printf-style message.
     * The cause argument can be null.
     */
    class WError extends VError {}
}

export = VError;