Op Tue, 11 Sep 2012, schreef Alexander Klenin:

On Tue, Sep 11, 2012 at 8:03 AM, Jonas Maebe <jonas.ma...@elis.ugent.be> wrote:

If you want to do that, you need to add a layer in between that converts the 
sets into integer bitmasks in a reliable, portable and future-proof way.

How about packed sets? Do they have well-defined memory layout? If
not, then maybe they should?

Sets, are a bit more complicated: Their binary layout is defined in Borland documentation, but this one of the few issues were FPC didn't follow Borland. FPC has smallsets, up to 32 items and longsets, up to 256 items. This is how it is documented in FPC documentation. Packed is ignored on sets and I don't see a need for a packed set with a different binary representation, but *should* sets every become unreliable in binary representation, I would agree with you that there is a need for a packed set that is reliable.

Daniël
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