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Newsgroups: comp.lang.ada
Date: Thu, 31 May 2018 07:38:50 -0700 (PDT)
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Subject: Re: about inheritance of subtypes and entities (such as constants)
 related to a type in the same package
From: "Dan'l Miller" <optikos@verizon.net>
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Xref: reader02.eternal-september.org comp.lang.ada:52812
Date: 2018-05-31T07:38:50-07:00
List-Id: <comp.lang.ada>

On Thursday, May 31, 2018 at 9:29:04 AM UTC-5, Dan'l Miller wrote:
> 2) in derived types:  =E2=80=A6 made incompatible to be called using the =
parent type and vice versa when appearing
> as parameters to routines.

I misspoke by trying to be too concise there in the =E2=80=9Cvice versa=E2=
=80=9D.  I meant:  =E2=80=A6 made incompatible to be called using the paren=
t type or any other subtypes of the parent when the subtype appears as para=
meters to routines.

Lack of ability to substitute a parent for a subtype and lack of ability to=
 substitute peer subtypes among a class-of-subtypes are anti-properties of =
inheritance, i.e., counter-examples disproving inheritance.