can a record contain an array whose bounds are not known at compi le time?

can a record contain an array whose bounds are not known at compi le time?

[Yu, Liyang]

Hi,

I need to use an array in a record and this array's bound is not known at
compile time. Can Ada do this? Can someone give me a example about how to do
this or any reference that I can use?

Thanks!

Re: can a record contain an array whose bounds are not known at compi le time?

[Robert A Duff]

"Yu, Liyang" <Liyang.Yu@delta.com> writes:

> I need to use an array in a record and this array's bound is not known at
> compile time. Can Ada do this? Can someone give me a example about how to do
> this or any reference that I can use?

If the array always has the *same* bounds, then you just use those
bounds (even if not compile-time known):

    subtype My_String is String(A..B);

    type T is
        record
            X: My_String;

A and B can depend on input data, for example.

If different records of the type have different-length arrays,
but the length doesn't change once created, use a discriminant
as suggested in another post.

If the length of the arrays changes over time, you must simulate that
using a pointer.

- Bob