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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Ada Successor Language
Date: Tue, 19 Jun 2018 21:39:28 +0200
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Xref: reader02.eternal-september.org comp.lang.ada:53168
Date: 2018-06-19T21:39:28+02:00
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On 2018-06-19 21:19, Paul Rubin wrote:
> "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:
>> There are 50 shades of mess. Ada's generics try to introduce some
>> weakly-typed contracts on the formal generic parameters, where C++
>> templates go completely untyped, but mess is always mess. You cannot
>> make a decent language out of macro processor.
> 
> I don't understand what you're getting at.  Are Ada generics implemented
> with a macro processor?  C++ templates amount to that, but there are
> other, better ways to implement generics.

Generics and macros are same thing regardless implementation. The core 
idea and all power lies in textual substitution as opposed to the 
concept substitutability in a properly typed systems. You can have 
shared generic bodies as in Janus Ada, but that changes nothing on the 
nature of generics. It was a mistake for both Ada and C++ to have them 
in the first place.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de