Issue 21978. Put function 'main' first when sorting members.

pkg/analysis_server/lib/src/services/correction/sort_members.dart

Index: pkg/analysis_server/lib/src/services/correction/sort_members.dart
diff --git a/pkg/analysis_server/lib/src/services/correction/sort_members.dart b/pkg/analysis_server/lib/src/services/correction/sort_members.dart
index 0c64a63873355b7980858794bee3913119618aec..90c6806d5160b81f86d7a6bff93bf17cdd8dc3d9 100644
--- a/pkg/analysis_server/lib/src/services/correction/sort_members.dart
+++ b/pkg/analysis_server/lib/src/services/correction/sort_members.dart
@@ -14,6 +14,7 @@ import 'package:analyzer/src/generated/ast.dart';
  */
 class MemberSorter {
   static List<_PriorityItem> _PRIORITY_ITEMS = [
+      new _PriorityItem(false, _MemberKind.UNIT_FUNCTION_MAIN, false),
       new _PriorityItem(false, _MemberKind.UNIT_VARIABLE, false),
       new _PriorityItem(false, _MemberKind.UNIT_VARIABLE, true),
       new _PriorityItem(false, _MemberKind.UNIT_ACCESSOR, false),
@@ -265,7 +266,11 @@ class MemberSorter {
           kind = _MemberKind.UNIT_ACCESSOR;
           name += " setter";
         } else {
-          kind = _MemberKind.UNIT_FUNCTION;
+          if (name == 'main') {
+            kind = _MemberKind.UNIT_FUNCTION_MAIN;
+          } else {
+            kind = _MemberKind.UNIT_FUNCTION;
+          }
         }
       }
       if (member is FunctionTypeAlias) {
@@ -385,15 +390,16 @@ class _MemberInfo {
 }
 
 class _MemberKind {
-  static const UNIT_ACCESSOR = const _MemberKind('UNIT_ACCESSOR', 0);
-  static const UNIT_FUNCTION = const _MemberKind('UNIT_FUNCTION', 1);
-  static const UNIT_FUNCTION_TYPE = const _MemberKind('UNIT_FUNCTION_TYPE', 2);
-  static const UNIT_CLASS = const _MemberKind('UNIT_CLASS', 3);
-  static const UNIT_VARIABLE = const _MemberKind('UNIT_VARIABLE', 4);
-  static const CLASS_ACCESSOR = const _MemberKind('CLASS_ACCESSOR', 5);
-  static const CLASS_CONSTRUCTOR = const _MemberKind('CLASS_CONSTRUCTOR', 6);
-  static const CLASS_FIELD = const _MemberKind('CLASS_FIELD', 7);
-  static const CLASS_METHOD = const _MemberKind('CLASS_METHOD', 8);
+  static const UNIT_FUNCTION_MAIN = const _MemberKind('UNIT_FUNCTION_MAIN', 0);
+  static const UNIT_ACCESSOR = const _MemberKind('UNIT_ACCESSOR', 1);
+  static const UNIT_FUNCTION = const _MemberKind('UNIT_FUNCTION', 2);
+  static const UNIT_FUNCTION_TYPE = const _MemberKind('UNIT_FUNCTION_TYPE', 3);
+  static const UNIT_CLASS = const _MemberKind('UNIT_CLASS', 4);
+  static const UNIT_VARIABLE = const _MemberKind('UNIT_VARIABLE', 5);
+  static const CLASS_ACCESSOR = const _MemberKind('CLASS_ACCESSOR', 6);
+  static const CLASS_CONSTRUCTOR = const _MemberKind('CLASS_CONSTRUCTOR', 7);
+  static const CLASS_FIELD = const _MemberKind('CLASS_FIELD', 8);
+  static const CLASS_METHOD = const _MemberKind('CLASS_METHOD', 9);
 
   final String name;
   final int ordinal;