Error Suppression FTW.

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/context/cache.dart';
 import 'package:analyzer/src/generated/ast.dart';
@@ skipping 2097 matching lines @@
   void internalPerform() {
     List<List<AnalysisError>> errorLists = <List<AnalysisError>>[];
     //
     // Prepare inputs.
     //
     EnginePlugin enginePlugin = AnalysisEngine.instance.enginePlugin;
     for (ResultDescriptor result in enginePlugin.dartErrorsForSource) {
       String inputName = result.name + '_input';
       errorLists.add(getRequiredInput(inputName));
     }
+
+    //
+    // Gather error filters.
+    //
+    List<ErrorFilter> filters =
+        context.getConfigurationData(CONFIGURED_ERROR_FILTERS);
     for (ResultDescriptor result in enginePlugin.dartErrorsForUnit) {
       String inputName = result.name + '_input';
       Map<Source, List<AnalysisError>> errorMap = getRequiredInput(inputName);
       for (List<AnalysisError> errors in errorMap.values) {
-        errorLists.add(errors);
+        errorLists.add(errors
+            .where((AnalysisError error) {
+              return !filters.any((ErrorFilter filter) => filter(error));
+            })
+            .toList());
       }
     }
     //
     // Record outputs.
     //
     outputs[DART_ERRORS] = AnalysisError.mergeLists(errorLists);
   }
 
   /**
    * Return a map from the names of the inputs of this kind of task to the task
@@ skipping 2613 matching lines @@
 
   @override
   bool moveNext() {
     if (_newSources.isEmpty) {
       return false;
     }
     currentTarget = _newSources.removeLast();
     return true;
   }
 }