Add 'Introduce new local with cast type' quick assist.

pkg/analysis_server/lib/src/services/correction/assist.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 services.correction.assist;
 
 import 'package:analysis_server/src/protocol.dart';
+import 'package:analysis_server/src/services/correction/assist_internal.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
-import 'package:analysis_server/src/services/correction/assist_internal.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/source.dart';
 
 
 /**
  * Computes [Assist]s at the given location.
  *
  * Returns the computed [Assist]s, not `null`.
  */
 List<Assist> computeAssists(SearchEngine searchEngine, CompilationUnit unit,
@@ skipping 23 matching lines @@
 
 
 /**
  * An enumeration of possible quick assist kinds.
  */
 class AssistKind {
   static const ADD_PART_DIRECTIVE =
       const AssistKind('ADD_PART_DIRECTIVE', 30, "Add 'part' directive");
   static const ADD_TYPE_ANNOTATION =
       const AssistKind('ADD_TYPE_ANNOTATION', 30, "Add type annotation");
-  static const ASSIGN_TO_LOCAL_VARIABLE =
-      const AssistKind(
-          'ASSIGN_TO_LOCAL_VARIABLE',
-          30,
-          "Assign value to new local variable");
+  static const ASSIGN_TO_LOCAL_VARIABLE = const AssistKind(
+      'ASSIGN_TO_LOCAL_VARIABLE',
+      30,
+      "Assign value to new local variable");
   static const CONVERT_INTO_BLOCK_BODY =
       const AssistKind('CONVERT_INTO_BLOCK_BODY', 30, "Convert into block body");
-  static const CONVERT_INTO_EXPRESSION_BODY =
-      const AssistKind(
-          'CONVERT_INTO_EXPRESSION_BODY',
-          30,
-          "Convert into expression body");
+  static const CONVERT_INTO_EXPRESSION_BODY = const AssistKind(
+      'CONVERT_INTO_EXPRESSION_BODY',
+      30,
+      "Convert into expression body");
   static const CONVERT_INTO_IS_NOT =
       const AssistKind('CONVERT_INTO_IS_NOT', 30, "Convert into is!");
   static const CONVERT_INTO_IS_NOT_EMPTY =
       const AssistKind('CONVERT_INTO_IS_NOT_EMPTY', 30, "Convert into 'isNotEmpty'");
   static const EXCHANGE_OPERANDS =
       const AssistKind('EXCHANGE_OPERANDS', 30, "Exchange operands");
   static const EXTRACT_CLASS =
       const AssistKind('EXTRACT_CLASS', 30, "Extract class into file '{0}'");
   static const IMPORT_ADD_SHOW =
       const AssistKind('IMPORT_ADD_SHOW', 30, "Add explicit 'show' combinator");
+  static const INTRODUCE_LOCAL_CAST_TYPE = const AssistKind(
+      'INTRODUCE_LOCAL_CAST_TYPE',
+      30,
+      "Introduce new local with cast type");

[Paul Berry, 2014/09/30 20:34:46]

I think this terminology may be confusing to Dart users, since in Dart
terminology, a "cast" only refers to expressions like "x as T".  Expressions
like "X is T" are called "type tests" by the spec.

How about changing the text to "Introduce new local with tested type"?

[scheglov, 2014/09/30 20:44:06]

Done.

   static const INVERT_IF_STATEMENT =
       const AssistKind('INVERT_IF_STATEMENT', 30, "Invert 'if' statement");
-  static const JOIN_IF_WITH_INNER =
-      const AssistKind(
-          'JOIN_IF_WITH_INNER',
-          30,
-          "Join 'if' statement with inner 'if' statement");
-  static const JOIN_IF_WITH_OUTER =
-      const AssistKind(
-          'JOIN_IF_WITH_OUTER',
-          30,
-          "Join 'if' statement with outer 'if' statement");
+  static const JOIN_IF_WITH_INNER = const AssistKind(
+      'JOIN_IF_WITH_INNER',
+      30,
+      "Join 'if' statement with inner 'if' statement");
+  static const JOIN_IF_WITH_OUTER = const AssistKind(
+      'JOIN_IF_WITH_OUTER',
+      30,
+      "Join 'if' statement with outer 'if' statement");
   static const JOIN_VARIABLE_DECLARATION =
       const AssistKind('JOIN_VARIABLE_DECLARATION', 30, "Join variable declaration");
   static const REMOVE_TYPE_ANNOTATION =
       const AssistKind('REMOVE_TYPE_ANNOTATION', 29, "Remove type annotation");
-  static const REPLACE_CONDITIONAL_WITH_IF_ELSE =
-      const AssistKind(
-          'REPLACE_CONDITIONAL_WITH_IF_ELSE',
-          30,
-          "Replace conditional with 'if-else'");
-  static const REPLACE_IF_ELSE_WITH_CONDITIONAL =
-      const AssistKind(
-          'REPLACE_IF_ELSE_WITH_CONDITIONAL',
-          30,
-          "Replace 'if-else' with conditional ('c ? x : y')");
+  static const REPLACE_CONDITIONAL_WITH_IF_ELSE = const AssistKind(
+      'REPLACE_CONDITIONAL_WITH_IF_ELSE',
+      30,
+      "Replace conditional with 'if-else'");
+  static const REPLACE_IF_ELSE_WITH_CONDITIONAL = const AssistKind(
+      'REPLACE_IF_ELSE_WITH_CONDITIONAL',
+      30,
+      "Replace 'if-else' with conditional ('c ? x : y')");
   static const SPLIT_AND_CONDITION =
       const AssistKind('SPLIT_AND_CONDITION', 30, "Split && condition");
-  static const SPLIT_VARIABLE_DECLARATION =
-      const AssistKind(
-          'SPLIT_VARIABLE_DECLARATION',
-          30,
-          "Split variable declaration");
+  static const SPLIT_VARIABLE_DECLARATION = const AssistKind(
+      'SPLIT_VARIABLE_DECLARATION',
+      30,
+      "Split variable declaration");
   static const SURROUND_WITH_BLOCK =
       const AssistKind('SURROUND_WITH_BLOCK', 30, "Surround with block");
   static const SURROUND_WITH_DO_WHILE =
       const AssistKind('SURROUND_WITH_DO_WHILE', 30, "Surround with 'do-while'");
   static const SURROUND_WITH_FOR =
       const AssistKind('SURROUND_WITH_FOR', 30, "Surround with 'for'");
   static const SURROUND_WITH_FOR_IN =
       const AssistKind('SURROUND_WITH_FOR_IN', 30, "Surround with 'for-in'");
   static const SURROUND_WITH_IF =
       const AssistKind('SURROUND_WITH_IF', 30, "Surround with 'if'");
   static const SURROUND_WITH_TRY_CATCH =
       const AssistKind('SURROUND_WITH_TRY_CATCH', 30, "Surround with 'try-catch'");
-  static const SURROUND_WITH_TRY_FINALLY =
-      const AssistKind(
-          'SURROUND_WITH_TRY_FINALLY',
-          30,
-          "Surround with 'try-finally'");
+  static const SURROUND_WITH_TRY_FINALLY = const AssistKind(
+      'SURROUND_WITH_TRY_FINALLY',
+      30,
+      "Surround with 'try-finally'");
   static const SURROUND_WITH_WHILE =
       const AssistKind('SURROUND_WITH_WHILE', 30, "Surround with 'while'");
 
   final name;
   final int relevance;
   final String message;
 
   const AssistKind(this.name, this.relevance, this.message);
 
   @override
   String toString() => name;
 }