Include the common library name used in 'part of' directives.

pkg/analyzer/lib/src/generated/error.dart

 // Copyright (c) 2014, 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.
 
 library engine.error;
 
 import 'dart:collection';
 
 import 'ast.dart' show AstNode;
 import 'element.dart';
@@ skipping 219 matching lines @@
    */
   HashMap<ErrorProperty, Object> _propertyMap =
       new HashMap<ErrorProperty, Object>();
 
   /**
    * Initialize a newly created analysis error for the specified [source]. The
    * error will have the given [errorCode] and the list of [arguments] will be
    * used to complete the message. The error has no location information.
    */
   AnalysisErrorWithProperties.con1(
-      Source source, ErrorCode errorCode, List<Object> arguments)
+      Source source, ErrorCode errorCode, [List<Object> arguments])
       : super.con1(source, errorCode, arguments);
 
   /**
    * Initialize a newly created analysis error for the specified [source] at the
    * given [offset] with the given [length]. The error will have the given
    * [errorCode] and the list of [arguments] will be used to complete the
    * message.
    */
   AnalysisErrorWithProperties.con2(Source source, int offset, int length,
       ErrorCode errorCode, List<Object> arguments)

[Brian Wilkerson, 2015/03/15 23:28:14]

Make 'arguments' optional here too?

[scheglov, 2015/03/15 23:38:15]

Done.

       : super.con2(source, offset, length, errorCode, arguments);
 
   @override
   Object getProperty(ErrorProperty property) => _propertyMap[property];
 
   /**
    * Set the value of the given [property] to the given [value]. Using a value
    * of `null` will effectively remove the property from this error.
    */
   void setProperty(ErrorProperty property, Object value) {
@@ skipping 2109 matching lines @@
    * The unique name of this error code.
    */
   String get uniqueName => "$runtimeType.$name";
 }
 
 /**
  * The properties that can be associated with an [AnalysisError].
  */
 class ErrorProperty extends Enum<ErrorProperty> {
   /**
-   * A property whose value is an array of [ExecutableElement] that should
+   * A property whose value is the name of the library that is used by all
+   * of the "part of" directives, so should be used in the "library" directive.
+   * Is `null` if there is no a single name used by all of the parts.
+   */
+  static const ErrorProperty PARTS_LIBRARY_NAME =
+      const ErrorProperty('PARTS_LIBRARY_NAME', 0);
+
+  /**
+   * A property whose value is a list of [ExecutableElement] that should
    * be but are not implemented by a concrete class.
    */
   static const ErrorProperty UNIMPLEMENTED_METHODS =
-      const ErrorProperty('UNIMPLEMENTED_METHODS', 0);
+      const ErrorProperty('UNIMPLEMENTED_METHODS', 1);
 
-  static const List<ErrorProperty> values = const [UNIMPLEMENTED_METHODS];
+  static const List<ErrorProperty> values = const [
+    PARTS_LIBRARY_NAME,
+    UNIMPLEMENTED_METHODS
+  ];
 
   const ErrorProperty(String name, int ordinal) : super(name, ordinal);
 }
 
 /**
  * An object used to create analysis errors and report then to an error
  * listener.
  */
 class ErrorReporter {
   /**
@@ skipping 2400 matching lines @@
    * Initialize a newly created error code to have the given [name].
    */
   const TodoCode(String name) : super(name, "{0}");
 
   @override
   ErrorSeverity get errorSeverity => ErrorSeverity.INFO;
 
   @override
   ErrorType get type => ErrorType.TODO;
 }