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From: Shark8 <onewingedshark@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: on the need to duplicate code for procedure signature in both
 body and interface files
Date: Sat, 7 Jul 2012 21:01:30 -0700 (PDT)
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Date: 2012-07-07T21:01:30-07:00
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On Saturday, July 7, 2012 5:08:53 PM UTC-6, Nasser M. Abbasi wrote:
> Basic question from an Ada newbie.
>=20
> One thing that always bothered me in Ada is the need
> to physically duplicate the code that represents the API
> of the package procedures and functions in both the interface
> and the body files (.ads and .adb).
>=20
> I do not like duplicating code at all. Even if it is only
> for the signature of the API, and even though the Ada
> compiler will catch any difference (assuming one changes
> the .ads and forget to update the .adb for example).
>=20
> Was there no other alternatives to avoid this situation
> when Ada was originally designed in order to keep the same
> good concept of separating the interface from the body, but
> somehow at the same time, eliminate the need to duplicate by
> hand the API definition code in 2 separate places?
>=20
> I am using GNAT. I Assume this is the same in other Ada
> implementations.
>=20
> thanks,
> --Nasser

There is no real way to do clean separate compilation without something lik=
e the spec/body separation (though it may be that everything code-wise is t=
he "body" and the "spec" is virtual/internal).

My suggestion here is to let the compiler point out your errors. Unlike C/C=
++ an Ada compiler is your friend. There might be an adb -> ads generator l=
aying around where you can just feed it an adb file and have it spit out th=
e ads-file, but I've never had reason to look for one.