Merge pull request microsoft#8843 from Microsoft/navbar_type_alias

Include type aliases as childItems in navigation bar

Author: Andy

src/services/navigationBar.ts

@@ -104,6 +104,7 @@ namespace ts.NavigationBar {
                     case SyntaxKind.ImportEqualsDeclaration:
                     case SyntaxKind.ImportSpecifier:
                     case SyntaxKind.ExportSpecifier:
+                    case SyntaxKind.TypeAliasDeclaration:
                         childNodes.push(node);
                         break;
                 }
@@ -326,6 +327,8 @@ namespace ts.NavigationBar {
                 case SyntaxKind.InterfaceDeclaration:
                     return createItem(node, getTextOfNode((<InterfaceDeclaration>node).name), ts.ScriptElementKind.interfaceElement);
 
+                case SyntaxKind.TypeAliasDeclaration:
+                    return createItem(node, getTextOfNode((<TypeAliasDeclaration>node).name), ts.ScriptElementKind.typeElement);
 
                 case SyntaxKind.CallSignature:
                     return createItem(node, "()", ts.ScriptElementKind.callSignatureElement);

tests/cases/fourslash/navigationBarItemsTypeAlias.ts

@@ -2,5 +2,6 @@
 
 ////type T = number | string;
 
-verify.navigationBarCount(1);
+verify.navigationBarCount(3);
 verify.navigationBarContains("T", "type");
+verify.navigationBarChildItem("<global>", "T", "type");