sdk/lib/async/async_error.dart

// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

part of dart.async;

_invokeErrorHandler(
    Function errorHandler, Object error, StackTrace stackTrace) {
  if (errorHandler is ZoneBinaryCallback<dynamic, Null, Null>) {
    // Dynamic invocation because we don't know the actual type of the
    // first argument or the error object, but we should successfully call
    // the handler if they match up.
    // TODO(lrn): Should we? Why not the same below for the unary case?
    return (errorHandler as dynamic)(error, stackTrace);
  } else {
    ZoneUnaryCallback unaryErrorHandler = errorHandler;
    return unaryErrorHandler(error);
  }
}