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Date: Tue, 15 Sep 2020 12:35:48 -0700 (PDT)
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Subject: Re: Visibility issue
From: Daniel <danielnorberto@gmail.com>
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Xref: reader02.eternal-september.org comp.lang.ada:60150
List-Id: <comp.lang.ada>

El lunes, 14 de septiembre de 2020 a las 16:42:26 UTC+2, Dmitry A. Kazakov =
escribi=C3=B3:
> task body Caller is=20
> My_Handle : Handle :=3D Create (6);=20
Dmitry, let me paste my answer i give to Jeff as an introduction to explain=
 better the problem. First of all, I want to thank you to point me to diffe=
rent options. I will think about to refactoring everything i have or even b=
uild from scratch if I'm not able to build from what i already have.

For the requirements, It's not a problem to have a public constructor for t=
he handle, in fact, i will need one for users. The real problem is to have =
constructors or function that i need to be visible from implementing packag=
es and at the same time NOT visible from users that only are allowed to do =
a "with API.XXX"

I have the next requirements:
- I need to pack all calls from users in just one Package API Hierarchy.
- The details and complexity of the implementation needs to be outside of t=
his API hierarchy as much as possible.
-I need to use tagged types as much as possible for the calls from users to=
 API package. (I'm not a big fan of this also but its a requirement)
-This API tagged types needs to connect the API Side with the implementatio=
n packages.
-The user needs to set a limited number of callback procedure with this fla=
vor: "Procedure (S : in out Tagged_APi_Type)"
-The Implementation package needs to trigger the procedure defined in the A=
PI. (Here comes to problems):
-->The implementation package needs to manipulate some hide part of the Tag=
ged_API_Type when is triggered
------>Here comes the problem. From the implementing  package  is not possi=
ble to see the private part of the API package. I think because visibility =
is not related to type, is related to package where package exists.