Add toMap / toMapOf / toList

pkg/analyzer/lib/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.task.dart;
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/scanner.dart';
@@ skipping 21 matching lines @@
     new CompositeResultDescriptor<List<AnalysisError>>('DART_ERRORS');
 
 /**
  * The sources of the libraries that are exported from a library.
  *
  * The list will be empty if there are no exported libraries, but will not be
  * `null`.
  *
  * The result is only available for targets representing a Dart library.
  */
-final ResultDescriptor<List<Source>> EXPORTED_LIBRARIES =
-    new ResultDescriptor<List<Source>>(
-        'EXPORTED_LIBRARIES', Source.EMPTY_ARRAY);
+final ListResultDescriptor<Source> EXPORTED_LIBRARIES =
+    new ListResultDescriptor<Source>('EXPORTED_LIBRARIES', Source.EMPTY_ARRAY);
 
 /**
  * A flag specifying whether a library imports 'dart:html'.
  *
  * The result is only available for targets representing a Dart library.
  */
 final ResultDescriptor<bool> HAS_HTML_IMPORT =
     new ResultDescriptor<bool>('HAS_HTML_IMPORT', false);
 
 /**
  * The sources of the libraries that are imported into a library.
  *
  * Not `null`.
  * The default value is empty.
  * When computed, this list will always contain at least `dart:core` source.
  *
  * The result is only available for targets representing a Dart library.
  */
-final ResultDescriptor<List<Source>> IMPORTED_LIBRARIES =
-    new ResultDescriptor<List<Source>>(
-        'IMPORTED_LIBRARIES', Source.EMPTY_ARRAY);
+final ListResultDescriptor<Source> IMPORTED_LIBRARIES =
+    new ListResultDescriptor<Source>('IMPORTED_LIBRARIES', Source.EMPTY_ARRAY);
 
 /**
  * The sources of the parts that are included in a library.
  *
  * The list will be empty if there are no parts, but will not be `null`. The
  * list does *not* include the source for the defining compilation unit.
  *
  * The result is only available for targets representing a Dart library.
  */
-final ResultDescriptor<List<Source>> INCLUDED_PARTS =
-    new ResultDescriptor<List<Source>>('INCLUDED_PARTS', Source.EMPTY_ARRAY);
+final ListResultDescriptor<Source> INCLUDED_PARTS =
+    new ListResultDescriptor<Source>('INCLUDED_PARTS', Source.EMPTY_ARRAY);
 
 /**
  * A flag specifying whether a library is launchable.
  *
  * The result is only available for targets representing a Dart library.
  */
 final ResultDescriptor<bool> IS_LAUNCHABLE =
     new ResultDescriptor<bool>('IS_LAUNCHABLE', false);
 
 /**
@@ skipping 31 matching lines @@
 /**
  * The token stream produced while scanning a compilation unit.
  *
  * The value is the first token in the file, or the special end-of-file marker
  * at the end of the stream if the file does not contain any tokens.
  *
  * The result is only available for targets representing a Dart compilation unit.
  */
 final ResultDescriptor<Token> TOKEN_STREAM =
     new ResultDescriptor<Token>('TOKEN_STREAM', null);