Fix erroneous name-specifiers prior to decltypes better/correctly as per Doug's feedback.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@142935 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 8 deletions

diff --git a/lib/Parse/ParseDeclCXX.cpp b/lib/Parse/ParseDeclCXX.cpp
index bdd41a27df..8530ff2740 100644
--- a/lib/Parse/ParseDeclCXX.cpp
+++ b/lib/Parse/ParseDeclCXX.cpp
@@ -713,13 +713,20 @@ void Parser::ParseUnderlyingTypeSpecifier(DeclSpec &DS) {
 ///
 Parser::TypeResult Parser::ParseBaseTypeSpecifier(SourceLocation &BaseLoc,
                                                   SourceLocation &EndLocation) {
+  // Parse optional nested-name-specifier
+  CXXScopeSpec SS;
+  ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false);
+
+  BaseLoc = Tok.getLocation();
+
   // Parse decltype-specifier
   if (Tok.is(tok::kw_decltype)) {
+    if (SS.isNotEmpty())
+      Diag(SS.getBeginLoc(), diag::err_unexpected_scope_on_base_decltype)
+        << FixItHint::CreateRemoval(SS.getRange());
     // Fake up a Declarator to use with ActOnTypeName.
     DeclSpec DS(AttrFactory);
 
-    BaseLoc = Tok.getLocation();
-
     ParseDecltypeSpecifier(DS);    
     EndLocation = DS.getSourceRange().getEnd();
 
@@ -727,12 +734,6 @@ Parser::TypeResult Parser::ParseBaseTypeSpecifier(SourceLocation &BaseLoc,
     return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
   }
 
-  // Parse optional nested-name-specifier
-  CXXScopeSpec SS;
-  ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false);
-
-  BaseLoc = Tok.getLocation();
-
   // Check whether we have a template-id that names a type.
   if (Tok.is(tok::annot_template_id)) {
     TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);