A new WG21 paper is available. A copy is linked below, and will also appear in the next normal WG21 mailing. If you are not a committee member, please use the comments section below or the std-proposals forum for public discussion.
Document number: N4030
by Clark Nelson
 The new
__has_cpp_attributefeature should be reviewed by EWG and WG21.
 I have added indications of changes relative to the published SD-6. The preface is informative; changes are not marked.
 This revision of this document contains STUBS for sections expected to be filled in later.