Re: instantiating io for variant record

[stt@ada-uts]

Generally, you must provide a default for the discriminant
for records used for direct or sequential I/O.
This allows the body of the generic to declare an object
large enough to hold any instance, to act as a buffer, etc.
Hence make your record:
   type rec(field : fieldtype := fieldtype'first) is record ...

This approach works with most Ada compilers.

Tucker Taft
Intermetrics, Inc.
Cambridge, MA  02138