Implement support for [[nodiscard]] in C++1z that is based off existing support for warn_unused_result, and treat it as an extension pre-C++1z. This also means extending the existing warn_unused_result attribute so that it can be placed on an enum as well as a class.

llvm-svn: 262872

1 files changed, 2 insertions, 1 deletions

diff --git a/clang/lib/Parse/ParseDeclCXX.cpp b/clang/lib/Parse/ParseDeclCXX.cpp
index 798284b3d39..15aded52b45 100644
--- a/clang/lib/Parse/ParseDeclCXX.cpp
+++ b/clang/lib/Parse/ParseDeclCXX.cpp
@@ -3635,7 +3635,8 @@ static bool IsBuiltInOrStandardCXX11Attribute(IdentifierInfo *AttrName,
   case AttributeList::AT_FallThrough:
   case AttributeList::AT_CXX11NoReturn:
     return true;
-
+  case AttributeList::AT_WarnUnusedResult:
+    return !ScopeName && AttrName->getName().equals("nodiscard");
   default:
     return false;
   }