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From: Shark8 <OneWingedShark@gmail.com>
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Newsgroups: comp.lang.ada
Subject: Re: Your wish list for Ada 202X
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Xref: news.eternal-september.org comp.lang.ada:19570
Date: 2014-04-24T09:20:52-06:00
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On 24-Apr-14 01:30, Dmitry A. Kazakov wrote:
> On Wed, 23 Apr 2014 15:28:27 -0600, Shark8 wrote:
>
>> On 23-Apr-14 14:00, Dmitry A. Kazakov wrote:
>>> On Wed, 23 Apr 2014 13:43:19 -0600, Shark8 wrote:
>>>
>>>> On 23-Apr-14 01:45, Dmitry A. Kazakov wrote:
>>>>> In the case of files there already is such stick object: /dev/null.
>>>>
>>>> I think there's a problem with that assertion
>>>>> C:\Programming\Projects\SiennaSCL\src>cd /dev/null
>>>>> The system cannot find the path specified.
>>>>
>>>> See?
>>>
>>> Path /= File
>>
>> Not much different:
>
> Decisively different.
>
> It would be trivial to implement Null_File_Type, provided there were
> Root_File_Type. Alas, non-tagged File_Type is Ada 83 heritage.
>
> If you don't mind being GNAT-locked, you can implement GNAT-specific
> Null_File of File_Type on top of GNAT implementation.
>
> For stream I/O everything is here. Root_Stream_Type is tagged.
>
> type Null_Stream_Type is new Root_Stream_Type with null record;
> overriding procedure Read ...
> overriding procedure Write ...
>
> Null_Stream : Null_Stream_Type;
>

You're completely missing the point -- it wasn't about a null-file, it 
was about assuming all computers are *nix.