-- Volatile requires exactly one Input or Output
- -- Isn't this just Input_Seen = Output_Seen ???
-
- if Volatile_Seen
- and then
- ((Input_Seen and Output_Seen) -- both
- or else
- (not Input_Seen and not Output_Seen)) -- none
- then
+ if Volatile_Seen and then Input_Seen = Output_Seen then
Error_Msg_N
("property Volatile requires exactly one Input or "
& "Output", State);