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Date: Sun, 27 May 2018 10:22:45 -0700 (PDT)
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Subject: Re: why "unconstrained subtype in component declaration" while said
 component given default value ?
From: Shark8 <onewingedshark@gmail.com>
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Xref: reader02.eternal-september.org comp.lang.ada:52734
Date: 2018-05-27T10:22:45-07:00
List-Id: <comp.lang.ada>

On Sunday, May 27, 2018 at 1:07:08 AM UTC-6, Simon Wright wrote:
>=20
> The Booch Components originally had the maximum length of a bounded
> container fixed at generic instantiation, which is a very limiting
> design.

I can see the merits for it though.
  Package Small_Stack is new Stack(Element =3D> Integer, Maximum =3D> 2**4)=
;
  Package Large_Stack is new Stack(Element =3D> Integer, Maximum =3D> 2**10=
);

  LS : Large_Stack.Stack;
  SS : Small_Stack.Stack;

These /should/ be different and incompatible types 98% of the time; the tim=
es they shouldn't are usually some form of low-level work OR some form of g=
eneric-thinking in a dynamic environment... and the last one is solvable w/=
 tagged-type/interface versions.