White-listing templated-scope friend decls is a good idea, but doing it

by marking the decl invalid isn't.  Make some steps towards supporting these
and then hastily shut them down at the last second by marking them as
unsupported.

llvm-svn: 116661

1 files changed, 11 insertions, 0 deletions

diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
index be1ee358e2a..583f7c59b41 100644
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -6532,6 +6532,17 @@ Decl *Sema::ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition,
 
   if (ND->isInvalidDecl())
     FrD->setInvalidDecl();
+  else {
+    FunctionDecl *FD;
+    if (FunctionTemplateDecl *FTD = dyn_cast<FunctionTemplateDecl>(ND))
+      FD = FTD->getTemplatedDecl();
+    else
+      FD = cast<FunctionDecl>(ND);
+
+    // Mark templated-scope function declarations as unsupported.
+    if (FD->getNumTemplateParameterLists())
+      FrD->setUnsupportedFriend(true);
+  }
 
   return ND;
 }