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From: "G.B." <bauhaus@notmyhomepage.invalid>
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Subject: Re: Why .ads as well as .adb?
Date: Sat, 8 Jun 2019 19:44:11 +0200
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Xref: reader01.eternal-september.org comp.lang.ada:56564
Date: 2019-06-08T19:44:11+02:00
List-Id: <comp.lang.ada>

On 08.06.19 01:37, Paul Rubin wrote:
> Brad Moore <bmoore.ada@gmail.com> writes:
>> I think it is a big mistake of languages that encourage the
>> specification and implementation to be in the same source file, and
>> very surprised to see that anyone would be arguing for that.
> 
> That seems like saying it's a mistake for math textbooks to be published
> as single volumes.  The text should instead be done in 2 volumes, with
> the statements of the theorems in the first volume, and the proofs in
> the second.  In practice I don't know of any math textbooks published
> that way.  There are some multi-volume ones, but they all still go:
> theorem, proof, theorem, proof.

Another, different comparison can see a spec as a list
of definitions to be dwelt on later in the text.