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Subject: Re: In precision typing we trust
Date: Wed, 20 Aug 2025 21:10:23 +0200
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On Wed, 20 Aug 2025, Niklas Holsti wrote:
|--------------------------------------------------------------------------|
|"Some people called Ada 83 an "object-based" language, perhaps because Ada|
|programs typically modelled the real application objects (as abstract data|
|types) even before tagged types were available."                          |
|--------------------------------------------------------------------------|

Dear Dr. Holsti,

Thanks for this contribution.

The person who coined "object-based" professes that OOP necessarily 
involves inheritance, whereas "object-based" programming does not. 
However, he did not coin "OOP".

Even \cite{Objective-C} professes that inheritence is not necessary for 
OOP. (But then again, it is not by Alan Curtis Kay, and it professes that 
Objective C be an OOP language, so do not rely on it for what an "OOP" 
language is!)

"OOP to me means only messaging, local retention and protection and

hiding of state-process, and extreme late-binding of all things."
says
HTTPS://userPage.FU-Berlin.De/~ram/pub/pub_jf47ht81Ht/doc_kay_oop_de
It might be possible to interpret this quotation to not necessitate 
inheritance, even with the part about "extreme late-binding of all 
things."


@book{Objective-C,
  author = {Cox, Brad J.},
  title = {Object oriented programming: an evolutionary approach},
  year = {1987},
  note = {``Reprinted with corrections April, 1987
Copyright {\copyright} 1986 by Productivity Products International, 
Inc.''},
  publisher = {Addison-Wesley}
  }