ConstDrops the mask mark from names the caller binds: while filter(d, k) is processed k has no read yet.
Readonlyname: "Nse"Whether id is a name the data mask supplies, i.e. a use the caller does not bind itself.
Drops the non-standard-evaluation mark from the outgoing edges of id that which accepts.
The parts of a call R does not evaluate the standard way.