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

pkg/analyzer/lib/src/task/dart.dart

 // Copyright (c) 2015, 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 analyzer.src.task.dart;
 
 import 'dart:collection';
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
@@ skipping 501 matching lines @@
   static final TaskDescriptor DESCRIPTOR = new TaskDescriptor(
       'BUILD_LIBRARY_ELEMENT', createTask, buildInputs, <ResultDescriptor>[
     BUILD_LIBRARY_ERRORS,
     RESOLVED_UNIT2,
     LIBRARY_ELEMENT1,
     IS_LAUNCHABLE,
     HAS_HTML_IMPORT
   ]);
 
   /**
+   * The constant used as an unknown common library name in parts.
+   */
+  static const String _UNKNOWN_LIBRARY_NAME = 'unknown-library-name';
+
+  /**
    * Initialize a newly created task to build a library element for the given
    * [target] in the given [context].
    */
   BuildLibraryElementTask(
       InternalAnalysisContext context, AnalysisTarget target)
       : super(context, target);
 
   @override
   TaskDescriptor get descriptor => DESCRIPTOR;
 
@@ skipping 17 matching lines @@
         new HashMap<Source, CompilationUnit>();
     for (CompilationUnit partUnit in partUnits) {
       Source partSource = partUnit.element.source;
       partUnitMap[partSource] = partUnit;
     }
     Source htmlSource = context.sourceFactory.forUri(DartSdk.DART_HTML);
     //
     // Update "part" directives.
     //
     LibraryIdentifier libraryNameNode = null;
+    String partsLibraryName = _UNKNOWN_LIBRARY_NAME;
     bool hasHtmlImport = false;
     bool hasPartDirective = false;
     FunctionElement entryPoint =
         _findEntryPoint(definingCompilationUnitElement);
     List<Directive> directivesToResolve = <Directive>[];
     List<CompilationUnitElementImpl> sourcedCompilationUnits =
         <CompilationUnitElementImpl>[];
     for (Directive directive in definingCompilationUnit.directives) {
       if (directive is ImportDirective) {
         hasHtmlImport = hasHtmlImport || directive.source == htmlSource;
@@ skipping 17 matching lines @@
           // Validate that the part contains a part-of directive with the same
           // name as the library.
           //
           String partLibraryName =
               _getPartLibraryName(partSource, partUnit, directivesToResolve);
           if (partLibraryName == null) {
             errors.add(new AnalysisError.con2(librarySource, partUri.offset,
                 partUri.length, CompileTimeErrorCode.PART_OF_NON_PART,
                 [partUri.toSource()]));
           } else if (libraryNameNode == null) {
-            // TODO(brianwilkerson) Collect the names declared by the part.
-            // If they are all the same then we can use that name as the
-            // inferred name of the library and present it in a quick-fix.
-            // partLibraryNames.add(partLibraryName);
+            if (partsLibraryName == _UNKNOWN_LIBRARY_NAME) {
+              partsLibraryName = partLibraryName;
+            } else if (partsLibraryName != partLibraryName) {
+              partsLibraryName = null;
+            }
           } else if (libraryNameNode.name != partLibraryName) {
             errors.add(new AnalysisError.con2(librarySource, partUri.offset,
                 partUri.length, StaticWarningCode.PART_OF_DIFFERENT_LIBRARY, [
               libraryNameNode.name,
               partLibraryName
             ]));
           }
           if (entryPoint == null) {
             entryPoint = _findEntryPoint(partElement);
           }
           directive.element = partElement;
           sourcedCompilationUnits.add(partElement);
         }
       }
     }
     if (hasPartDirective && libraryNameNode == null) {
-      errors.add(new AnalysisError.con1(librarySource,
-          ResolverErrorCode.MISSING_LIBRARY_DIRECTIVE_WITH_PART));
+      AnalysisError error;
+      if (partsLibraryName != _UNKNOWN_LIBRARY_NAME &&
+          partsLibraryName != null) {
+        error = new AnalysisErrorWithProperties.con1(librarySource,
+            ResolverErrorCode.MISSING_LIBRARY_DIRECTIVE_WITH_PART)
+          ..setProperty(ErrorProperty.PARTS_LIBRARY_NAME, partsLibraryName);
+      } else {
+        error = new AnalysisError.con1(librarySource,
+            ResolverErrorCode.MISSING_LIBRARY_DIRECTIVE_WITH_PART);
+      }
+      errors.add(error);
     }
     //
     // Create and populate the library element.
     //
     LibraryElementImpl libraryElement =
         new LibraryElementImpl.forNode(context, libraryNameNode);
     libraryElement.definingCompilationUnit = definingCompilationUnitElement;
     libraryElement.entryPoint = entryPoint;
     libraryElement.parts = sourcedCompilationUnits;
     for (Directive directive in directivesToResolve) {
@@ skipping 449 matching lines @@
   }
 
   /**
    * Create a [ScanDartTask] based on the given [target] in the given [context].
    */
   static ScanDartTask createTask(
       AnalysisContext context, AnalysisTarget target) {
     return new ScanDartTask(context, target);
   }
 }