Change IllegalArgumentException to ArgumentError.

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 Error {
   const Error();
 }
 
 class AssertionError implements Error {
 }
 
 class TypeError implements AssertionError {
 }
 
 // TODO(lrn): Rename to CastError according to specification.
 class CastException implements Error {
 }
 
+/**
+ * Error thrown when a function is passed an unacceptable argument.
+ */
+class ArgumentError implements Error {
+  final message;
+
+  /** The [message] describes the erroneous argument. */
+  const ArgumentError([this.message = ""]);
+
+  String toString() => "Illegal argument(s): $message";

[Søren Gjesse, 2012/09/25 12:22:24]

Shouldn't the toString result be without the ": " at the end if message is null
or the empty string?

[Lasse Reichstein Nielsen, 2012/09/25 12:28:07]

It should, yes.

+}
+
+/**
+ * Temporary backwards compatibility class.
+ *
+ * Removed when users have had time to change to using [ArgumentError].
+ */
+class IllegalArgumentException extends ArgumentError {
+  const IllegalArgumentException([argument = ""]) : super(argument);
+}
+
+
 class FallThroughError implements Error {
   const FallThroughError();
 }
 
 class AbstractClassInstantiationError {
 }
 
 /**
  * Error thrown by the default implementation of [:noSuchMethod:] on [Object].
  */
@@ skipping 64 matching lines @@
         .replaceAll('\n', '${backslash}n')
         .replaceAll('\r', '${backslash}r')
         .replaceAll('"',  '$backslash"');
       return '"$escaped"';
     }
     return _objectToString(object);
   }
 
   external static _objectToString(Object object);
 }