Rename NoSuchMethodException to NoSuchMethodError.

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 {
 }
 
 class FallThroughError implements Error {
   const FallThroughError();
 }
 
 class AbstractClassInstantiationError {
 }
+
+/**
+ * Error thrown by the default implementation of [:noSuchMethod:] on [Object].
+ */
+class NoSuchMethodError implements Error {
+  final Object _receiver;
+  final String _functionName;
+  final List _arguments;
+  final List _existingArgumentNames;
+
+  const NoSuchMethodError(Object this._receiver,

[Johnni Winther, 2012/09/11 08:41:38]

Please add dartdoc to explain usage. In particular the meaning of
existingArgumentNames.

[Lasse Reichstein Nielsen, 2012/09/11 11:35:41]

Done.

+                          String this._functionName,
+                          List this._arguments,
+                          [List existingArgumentNames = null])
+      : this._existingArgumentNames = existingArgumentNames;
+
+  String toString() {
+    StringBuffer sb = new StringBuffer();
+    for (int i = 0; i < _arguments.length; i++) {
+      if (i > 0) {
+        sb.add(", ");
+      }
+      sb.add(_arguments[i]);
+    }
+    if (_existingArgumentNames === null) {
+      return "NoSuchMethodError : method not found: '$_functionName'\n"
+          "Receiver: $_receiver\n"
+          "Arguments: [$sb]";
+    } else {
+      String actualParameters = sb.toString();
+      sb = new StringBuffer();
+      for (int i = 0; i < _existingArgumentNames.length; i++) {
+        if (i > 0) {
+          sb.add(", ");
+        }
+        sb.add(_existingArgumentNames[i]);
+      }
+      String formalParameters = sb.toString();
+      return "NoSuchMethodError: incorrect number of arguments passed to "
+          "method named '$_functionName'\nReceiver: $_receiver\n"
+          "Tried calling: $_functionName($actualParameters)\n"
+          "Found: $_functionName($formalParameters)";
+    }
+  }
+}