mcragg@gmu90x.UUCP (Maureen Cragg) (04/18/89)
i have a variant record type defined, something like this: type field_type is (id, date, text); type record_type(field : field_type); type rec_ptr is access record_type; type record_type(field : field_type) is record previous : rec_ptr := null; next : rec_ptr := null; case field is when id => id : integer; when date => date : calendar.time; when text => line : string(1..80); end case; end record; for the purpose of storing different types of info in the same record, as well as varying numbers of the same type(the text is used to store free-format data, entered via an text editor:can be any number of lines). so how does one instantiate sequential_io for this record_type? this: package rec_io is new sequential_io(record_type); gives the error msg: "generic package/subprogram spec/body requires a constrained type" adTHANXvance for any suggestions. the air drummer
mcragg@gmu90x.UUCP (Maureen Cragg) (04/18/89)
after compiling this code successfully under dec ada, i finally figured out that the discriminant needed a default...dec ada is much more forgiving than adavax:-} the air drummer