A new WG21 paper is available. A copy is linked below, and the paper 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: N3843
by Walter E. Brown
This paper proposes to reformulate the specification of the
common_typetrait so as to avoid a hard error when there is no common type, and thus to make the trait conveniently usable in a SFINAE context.