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From: G. B. <nonlegitur@nmhp.invalid>
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Subject: Re: decomposing large packages
Date: Thu, 9 Jan 2020 18:24:52 -0000 (UTC)
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Dmitry A. Kazakov <mailbox@dmitry-kazakov.de> wrote:
> On 2020-01-09 09:25, mario.blunk.gplus@gmail.com wrote:
> 
>> that solves the problem for the moment. When working with subunits, it
>> is not obvious for the newcomer that:
>> 1.  (...)
>> 4. no other procedure or function must exist in P-n.adb .
>> 
>> I wonder why the authors of Ada training books don't point out such things ...
> 
> Because file naming and one compilation unit per source file limitation 
> are GNAT specific.

The GNAT User's Guide is worth reading, for newcomers in particular. File
naming defaults in:

http://docs.adacore.com/live/wave/gnat_ugn/html/gnat_ugn/gnat_ugn/the_gnat_compilation_model.html#file-naming-topics-and-utilities