Non-type template parameter packs cannot have default arguments.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@122533 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaTemplate.cpp b/lib/Sema/SemaTemplate.cpp
index a487825..ce0132e 100644
--- a/lib/Sema/SemaTemplate.cpp
+++ b/lib/Sema/SemaTemplate.cpp
@@ -649,6 +649,14 @@
// Check the well-formedness of the default template argument, if provided.
if (Default) {
+ // C++0x [temp.param]p9:
+ // A default template-argument may be specified for any kind of
+ // template-parameter that is not a template parameter pack.
+ if (IsParameterPack) {
+ Diag(EqualLoc, diag::err_template_param_pack_default_arg);
+ return Param;
+ }
+
// Check for unexpanded parameter packs.
if (DiagnoseUnexpandedParameterPack(Default, UPPC_DefaultArgument))
return Param;