[Dwarf-discuss] Encoding variant records: request for clarification.
Fri Aug 18 01:10:32 PDT 2006
I'm finding the description of variants a little difficult to
interpret and apply, and I wonder if someone could supply me with an
example. Let's consider specifically the Ada record type R,
type R (N : Integer) is record
Data : String (1 .. N);
case N is
when 0 =>
Name : String (1 .. N);
when 1..20 =>
Id, Port : Integer;
when others =>
N here is basically a member of R. As you can see, it is referred to
in Data. According to the standard, however, there is ALSO a child of
the variant part for N. What is the relationship between the two (the
child of R representing N and the child of the variant child of R
representing N)? How exactly is type R to be encoded?
Thanks in advance.
AdaCore, Inc. & UC Berkeley
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