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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: Five Years After
Date: Wed, 24 Jan 2018 20:51:35 -0600
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Xref: reader02.eternal-september.org comp.lang.ada:50132
Date: 2018-01-24T20:51:35-06:00
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"Simon Clubley" <clubley@remove_me.eisner.decus.org-Earth.UFP> wrote in 
message news:p4alg9$ec0$1@dont-email.me...
...
> There is however a small core in the Ada language that could bring
> benefits elsewhere but without all the overhead of a full blown
> Ada implementation.

That was the original theory behind the Janus/Ada implementation (way back 
in 1981). We eventually abandoned it and commited to a full Ada 83 compiler 
mainly because Ichbiah did such a good job in using each feature to support 
the others. With the possible exception of tasking (and tasking isn't really 
optional in a multicore world), pretty much all of the remainder of Ada 83 
is needed in order to make a solid core.

Otherwise, one ends up having to design replacements for expensive to 
implement features like up-and-down type resolution (needed to support 
overloading on result types, and without that, you will have a lot of issues 
with operator overloading), generics, finalization (if you are dealing with 
Ada 95), and more.

                           Randy.