3 files changed, 8 insertions, 4 deletions
diff --git a/clang/lib/Parse/ParseDecl.cpp b/clang/lib/Parse/ParseDecl.cpp
index 1f81202f014..0c68f7664e6 100644
--- a/clang/lib/Parse/ParseDecl.cpp
+++ b/clang/lib/Parse/ParseDecl.cpp
@@ -324,8 +324,8 @@ Parser::DeclGroupPtrTy Parser::ParseDeclaration(unsigned Context,
     SingleDecl = ParseDeclarationStartingWithTemplate(Context, DeclEnd);
     break;
   case tok::kw_inline:
-    // Could be the start of an inline namespace.
-    if (getLang().CPlusPlus0x && NextToken().is(tok::kw_namespace)) {
+    // Could be the start of an inline namespace. Allowed as an ext in C++03.
+    if (getLang().CPlusPlus && NextToken().is(tok::kw_namespace)) {
       if (Attr.HasAttr)
         Diag(Attr.Range.getBegin(), diag::err_attributes_not_allowed)
           << Attr.Range;
diff --git a/clang/lib/Parse/ParseDeclCXX.cpp b/clang/lib/Parse/ParseDeclCXX.cpp
index 26d460c6ffb..b277156a0d0 100644
--- a/clang/lib/Parse/ParseDeclCXX.cpp
+++ b/clang/lib/Parse/ParseDeclCXX.cpp
@@ -103,6 +103,10 @@ Decl *Parser::ParseNamespace(unsigned Context,
     return 0;
   }
 
+  // If we're still good, complain about inline namespaces in non-C++0x now.
+  if (!getLang().CPlusPlus0x && InlineLoc.isValid())
+    Diag(InlineLoc, diag::ext_inline_namespace);
+
   // Enter a scope for the namespace.
   ParseScope NamespaceScope(this, Scope::DeclScope);
 
diff --git a/clang/lib/Parse/Parser.cpp b/clang/lib/Parse/Parser.cpp
index 54053435322..44bd0fbc0c0 100644
--- a/clang/lib/Parse/Parser.cpp
+++ b/clang/lib/Parse/Parser.cpp
@@ -484,8 +484,8 @@ Parser::DeclGroupPtrTy Parser::ParseExternalDeclaration(CXX0XAttributeList Attr,
     }
 
   case tok::kw_inline:
-    if (getLang().CPlusPlus0x && NextToken().is(tok::kw_namespace)) {
-      // Inline namespaces
+    if (getLang().CPlusPlus && NextToken().is(tok::kw_namespace)) {
+      // Inline namespaces. Allowed as an extension even in C++03.
       SourceLocation DeclEnd;
       return ParseDeclaration(Declarator::FileContext, DeclEnd, Attr);
     }