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Newsgroups: comp.lang.ada
Date: Sun, 1 May 2016 13:55:57 -0700 (PDT)
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Subject: Re: I have no idea why this will not compile.
From: John Smith <yoursurrogategod@gmail.com>
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Xref: news.eternal-september.org comp.lang.ada:30330
Date: 2016-05-01T13:55:57-07:00
List-Id: <comp.lang.ada>

That's more helpful, thanks.  And no, I'm not very proficient in Ada, hence=
 my=20
confusion.  Based on what you suggested, option two makes the most sense.

Again, since I'm still learning, this is what I've come up with:
http://pastebin.ca/3588100

And now I'm getting the following error:
"full view of private extension must be an extension"

On Sunday, May 1, 2016 at 6:10:34 AM UTC-4, mockturtle wrote:
> You already received two answers that help you to solve the problem.  How=
ever, depending on your knowledge of Ada, maybe a longer explanation could =
be useful.
>=20
> "limited" in Ada is used to mark a type that cannot be copied.  For examp=
le, task types are limited (it does not make much sense copying a task), pr=
otected objects are limited (what means to copy them is doubtful).  In the =
case of File_Type I guess they are limited because the file has an "interna=
l state" that could be bring to subtle errors if copied.  (BTW, also in C y=
ou never copy a FILE, but a pointer to FILE, never copying the underling st=
ructure).
>=20
> In Ada is not permitted to use a limited type as a component of a *non li=
mited* record, since this would allow you to avoid the original limited res=
triction (by copying the record you would copy also the limited component).=
  Because of this, Ada requires that you declare limited any record that ha=
s a limited component.
>=20
> Solutions?  I can think about three solutions:
>=20
> 1.  Make the record limited
> 2. Use an access to the limited type
> 3. Move the limited component outside the record
>=20
> I think that the best solution depends on your specfic case.
>=20
> Riccardo