module type Make_arg = Flags__Flags_intf.Make_argmodule type S = Flags__Flags_intf.Sval create : bit:int -> Core_kernel.Int63.tcreate ~bit:n creates a flag with the nth bit set. n must be between 0 and 62.
Typically a flag has one bit set; create is useful in exactly those cases. For flags with multiple bits one can either define the Int63.t directly or create it in terms of simpler flags, using + and -.