sdk/lib/core/errors.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.

class AssertionError {
}

class TypeError extends AssertionError {
}

class CastException extends TypeError {
}

class FallThroughError {
  const FallThroughError();
}