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From: Jeffrey Carter <spam.jrcarter.not@spam.not.acm.org>
Newsgroups: comp.lang.ada
Subject: Re: GNAT GPL is proving...educational
Date: Sun, 21 Jul 2013 20:26:10 -0700
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Date: 2013-07-21T20:26:10-07:00
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On 07/21/2013 06:28 PM, Alan Jump wrote:
>
> package Stacks.Vector is
>
> one must use
>
> package Stacks_Vector is
>
> and then save the file as Stacks_Vector.ads.

Stacks.Vector is a child package; its parent is package Stacks. Package Stacks 
must exist to have child packages.

GNAT's default naming rules expect the specification of package Stacks_Vector to 
be in a file named stacks_vector.ads (all lower case) with its body in 
stacks_vector.adb. (Package Stacks.Vector would be in a files named 
stacks-vector.ad[sb].) Ada has nothing to say about source file names. Many 
compilers will accept any file names you care to use.

GNAT also requires one compilation unit per source file, but this again is not 
something defined by the language, and many compilers will accept files 
containing multiple compilation units. Many experienced Ada software engineers 
find having a single compilation unit per file a good idea.

-- 
Jeff Carter
"If a sperm is wasted, God gets quite irate."
Monty Python's the Meaning of Life
56