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From: j.onions@xtel.co.uk (Julian Onions)
Newsgroups: comp.protocols.iso.dev-environ
Subject: Re: OPTIONAL SEQUENCES and pepy
Message-ID: <24458.670154849@xtel.co.uk>
Date: 28 Mar 91 10:07:29 GMT
References: <9103271724.AA02050@rhino.ncsl.nist.gov>
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If the OPTIONAL part is not present the pointer will be NULL
If it is present, it will allocate a structure only if there are members
in the SEQUENCE OF. If the SEQUENCE OF turns out to have 0 elements in
it it will be the same as if the SEQUENCE OF was not encoded.
You cannot distinguish between these two cases with posy/pepsy. Either
the element is there and has 1 or more components or it is treated as abesnt.


Julian.