Add type aliases to navigation bar

src/services/navigationBar.ts

@@ -176,6 +176,7 @@ namespace ts.NavigationBar {
  break;
  case SyntaxKind.EnumDeclaration:
  case SyntaxKind.InterfaceDeclaration:
+ case SyntaxKind.TypeAliasDeclaration:
  topLevelNodes.push(node);
  break;
 
@@ -422,6 +423,9 @@ namespace ts.NavigationBar {
 
  case SyntaxKind.FunctionDeclaration:
  return createFunctionItem(<FunctionDeclaration>node);
+
+ case SyntaxKind.TypeAliasDeclaration:
+ return createTypeAliasItem(<TypeAliasDeclaration>node);
  }
 
  return undefined;
@@ -474,6 +478,15 @@ namespace ts.NavigationBar {
  return undefined;
  }
 
+ function createTypeAliasItem(node: TypeAliasDeclaration): ts.NavigationBarItem {
+ return getNavigationBarItem(node.name.text,
+ ts.ScriptElementKind.typeElement,
+ getNodeModifiers(node),
+ [getNodeSpan(node)],
+ [],
+ getIndent(node));
+ }
+
  function createMemberFunctionLikeItem(node: MethodDeclaration | ConstructorDeclaration): ts.NavigationBarItem {
  if (node.body && node.body.kind === SyntaxKind.Block) {
  let childItems = getItemsWorker(sortNodes((<Block>node.body).statements), createChildItem);

tests/cases/fourslash/navigationBarItemsTypeAlias.ts

@@ -0,0 +1,6 @@
+/// <reference path="fourslash.ts"/>
+
+////type T = number | string;
+
+verify.navigationBarCount(1);
+verify.navigationBarContains("T", "type");