Enum handling for dart_fmt.

pkg/analyzer/lib/src/services/formatter_impl.dart

 // Copyright (c) 2013, 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 formatter_impl;
 
 import 'dart:math';
 
 import 'package:analyzer/analyzer.dart';
 import 'package:analyzer/src/generated/parser.dart';
@@ skipping 752 matching lines @@
   visitEmptyFunctionBody(EmptyFunctionBody node) {
     token(node.semicolon);
   }
 
   visitEmptyStatement(EmptyStatement node) {
     if (!codeTransforms || node.parent is! Block) {
       token(node.semicolon);
     }
   }
 
+  visitEnumConstantDeclaration(EnumConstantDeclaration node){
+    visit(node.name);
+  }
+
+  visitEnumDeclaration(EnumDeclaration node){
+    visitMemberMetadata(node.metadata);
+    token(node.keyword);
+    space();
+    visit(node.name);
+    space();
+    token(node.leftBracket);
+    newlines();
+    indent();
+    visitCommaSeparatedNodes(node.constants);
+    newlines();
+    token(node.rightBracket, precededBy: unindent);
+  }
+
   visitExportDirective(ExportDirective node) {
     visitDirectiveMetadata(node.metadata);
     token(node.keyword);
     space();
     visit(node.uri);
     allowContinuedLines((){
       visitNodes(node.combinators, precededBy: space, separatedBy: space);
     });
     token(node.semicolon);
   }
@@ skipping 1051 matching lines @@
   /// Count the lines between two offsets.
   int linesBetween(int lastOffset, int currentOffset) {
     var lastLine =
         lineInfo.getLocation(lastOffset).lineNumber;
     var currentLine =
         lineInfo.getLocation(currentOffset).lineNumber;
     return currentLine - lastLine;
   }
 
   String toString() => writer.toString();
-
-  @override
-  visitEnumConstantDeclaration(EnumConstantDeclaration node) {
-    // TODO: implement visitEnumConstantDeclaration
-  }
-
-  @override
-  visitEnumDeclaration(EnumDeclaration node) {
-    // TODO: implement visitEnumDeclaration
-  }
 }