From: Adrian Hoe <abyhoe@gmail.com>
Subject: Re: Type in allocator has deeper level than designated class-wide type
Date: Mon, 13 Jun 2011 18:07:26 -0700 (PDT)
Date: 2011-06-13T18:07:26-07:00 [thread overview]
Message-ID: <c75dff70-d143-49bd-9a00-46fa9b3d20f4@h12g2000pro.googlegroups.com> (raw)
In-Reply-To: 92fb5bf2-f43e-4ac9-97eb-6092f10e5607@e17g2000prj.googlegroups.com
On Jun 14, 1:11 am, Adam Beneschan <a...@irvine.com> wrote:
> On Jun 13, 8:31 am, Adrian Hoe <aby...@gmail.com> wrote:
>
>
>
>
>
> > Hi all,
>
> > I have stomped into above error and I am stuck with the error and
> > runtime exception PROGRAM_ERROR : accessibility check failed.
>
> > Here's the fragment of my codes:
>
> > generic
> > N : Positive;
> > type Item is private;
> > package High_Cloud is
>
> > package List renames Heterogeneous_Doubly_Link_List;
> > use List;
>
> > type Data_Array is array ( 1 .. N ) of Item;
>
> > type Element_Record is new List.Node with private;
> > type Series_Access is new List.Access_List;
>
> > private
>
> > type Element_Record is new List.Node with
> > record
> > Name : Unbounded_String;
> > Color : Unbounded_String;
> > Data : Data_Array;
> > end record;
>
> > ...
> > end High_Cloud;
>
> > In the package body of High_Cloud, I have a procedure:
>
> > procedure Add
> > ( Cloud : in out High_Cloud_Record;
> > Name : in Unbounded_String;
> > Color : in Unbounded_String;
> > Data : in Data_Array )
> > is
>
> > New_Element : List.Access_Node;
>
> > begin
>
> > New_Element := new Element_Record'
> > <========== Error/Warning here.
> > ( Constructor.Init ( Name, Color, Data) ) ;
>
> > Concatenate ( Cloud.Series, New_Element ) ;
>
> > end Add;
>
> > My intention is to use genericity to create a data which is an array
> > (1..N) of any_type. This data is then stored in a list. Procedure Add
> > instantiate (by calling to Constructor.Init) the list's node with
> > data.
>
> > I have read the ARM 3.10.2 and 3.10.1 and also John Barnes book yet I
> > still have no clue how to solve the problem.
>
> > Can you please help? Thanks.
>
> I think we need to see the definition of Constructor.Init, at least.
> (I'm guessing that Heterogeneous_Doubly_Link_List is a library package
> that defines Node as a tagged record and Access_Node as "access all
> Node'Class". But I don't have a guess about what Init is.)
>
> -- Adam
I changed the line in procedure Add from
New_Element := new Element_Record'
( Constructor.Init ( Name, Color, Data) ) ;
to
New_Element := new Element_Record;
The compiler is still pointing the same warning to this line.
What exactly does the warning message "Type in allocator has deeper
level than designated class-wide type" mean? Is the compiler unable to
determine the size of the array during allocation? Or the array is a
level deeper than the List.Access_Node?
Thanks.
--
Adrian Hoe
http://adrianhoe.com/adrianhoe
next prev parent reply other threads:[~2011-06-14 1:07 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-13 15:31 Type in allocator has deeper level than designated class-wide type Adrian Hoe
2011-06-13 17:11 ` Adam Beneschan
2011-06-14 0:49 ` Adrian Hoe
2011-06-14 1:08 ` Adam Beneschan
2011-06-14 1:11 ` Adrian Hoe
2011-06-14 1:07 ` Adrian Hoe [this message]
2011-06-14 1:24 ` Adam Beneschan
2011-06-14 6:04 ` Adrian Hoe
2011-06-14 8:01 ` Adrian Hoe
2011-06-14 16:01 ` Adam Beneschan
2011-06-15 2:04 ` Adrian Hoe
2011-06-15 15:44 ` Adam Beneschan
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