A new WG21 paper is available. If you are not a committee member, please use the comments section below or the std-proposals forum for public discussion.
Document number: P0212R0
by Andrew Tomazos
A wording for the [[maybe_unused]] attribute is proposed for application to the C++17 Working Draft. The semantics of [[maybe_unused]] are the same as those described for [[unused]] in P0068R0 and presented to Kona EWG. Kona EWG voted SF=5, F=11, N=2, A=0, SA=0 in favor of the attribute.
See P0068R0 for detailed motivation/rationale.