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Newsgroups: comp.lang.ada
Date: Mon, 12 Nov 2018 13:02:15 -0800 (PST)
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Subject: Re: Aliased Unchecked_Unions not seen or taken notice of
From: Lucretia <laguest9000@googlemail.com>
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Xref: reader02.eternal-september.org comp.lang.ada:54820
Date: 2018-11-12T13:02:15-08:00
List-Id: <comp.lang.ada>

On Monday, 12 November 2018 20:13:53 UTC, Dmitry A. Kazakov  wrote:
> On 2018-11-12 19:29, Lucretia wrote:
> > On Monday, 12 November 2018 17:56:05 UTC, Lucretia  wrote:
> > 
> >>     type Results (Success : Boolean) is
> >>     record
> >>        case Success is
> >>           when False =>
> >>              Error : Errors_Ptr;
> >>
> >>           when True =>
> >>              Output : Values_Ptr;
> >>        end case;
> >>     end record with
> >>       Convention      => C_Pass_By_Copy;
> > 
> > This compiles fine. So it seems impossible to use unchecked_union and access types together.
> 
> What about C_Pass_By_Copy? That looks much inconsistent with access to me.

I did try removing that too.
 
> BTW, why do you want to use unchecked union? In comparable cases I 
> rather simply overload imported functions with whatever arguments:

Because it's not that simple.