Share via


C28304

Note

This article applies to Visual Studio 2015. If you're looking for the latest Visual Studio documentation, see Visual Studio documentation. We recommend upgrading to the latest version of Visual Studio. Download it here

warning C28304: For C++ reference-parameter <parameter_name>, an improperly placed _Notref_ operator was found applied to <token>.

The _Notref_ operator should only be used in special circumstances involving C++ reference parameters and only in system-provided macros. It must be immediately followed by a _Deref_ operator or a functional annotation.