From: AdaMagica <christ-usch.grein@t-online.de>
Subject: Re: Ada.Real_Time.Time_Last
Date: Sat, 18 Nov 2017 05:06:25 -0800 (PST)
Date: 2017-11-18T05:06:25-08:00 [thread overview]
Message-ID: <591a9389-a4b8-43fa-b963-0ebb9e488be1@googlegroups.com> (raw)
In-Reply-To: <f79394Ffvq2U1@mid.individual.net>
Am Freitag, 17. November 2017 22:39:51 UTC+1 schrieb Niklas Holsti:
> Long ago, I suggested (on c.l.a) an Ada extension by which a package
> could declare private types using the same classes of types that can be
> used for generic formal types. That would IMO not only be useful for
> programmers, it could formalise some of the informal text in the Ada RM.
> For example, RM A.4.8 defines the type Ada.Direct_IO.Count as
>
> type Count is range 0 .. implementation defined;
>
> With the suggested extension, this could be written in legal (extended)
> Ada as
>
> type Count is private range <>;
>
> That form still does not show that Count'First = 0, but with a little
> further extension one could perhaps leave only the upper bound
> unspecified, as in:
>
> type Count is private range 0 .. <>;
>
> Perhaps it is time for me to revive this proposal...
>
Problem with this is that private types have no predefined operators.
next prev parent reply other threads:[~2017-11-18 13:06 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-15 14:28 Ada.Real_Time.Time_Last Simon Wright
2017-11-15 20:03 ` Ada.Real_Time.Time_Last Niklas Holsti
2017-11-17 9:20 ` Ada.Real_Time.Time_Last Simon Wright
2017-11-17 21:39 ` Ada.Real_Time.Time_Last Niklas Holsti
2017-11-18 13:06 ` AdaMagica [this message]
2017-11-18 13:18 ` Ada.Real_Time.Time_Last Niklas Holsti
2017-11-18 14:00 ` Ada.Real_Time.Time_Last AdaMagica
2017-11-18 14:15 ` Ada.Real_Time.Time_Last Jeffrey R. Carter
2017-11-18 15:24 ` Ada.Real_Time.Time_Last Niklas Holsti
2017-11-18 16:01 ` Ada.Real_Time.Time_Last Dmitry A. Kazakov
2017-11-18 17:31 ` Ada.Real_Time.Time_Last Niklas Holsti
2017-11-18 22:20 ` Ada.Real_Time.Time_Last Robert A Duff
2017-11-19 10:50 ` Ada.Real_Time.Time_Last Niklas Holsti
2017-11-20 5:57 ` Ada.Real_Time.Time_Last J-P. Rosen
2019-01-29 22:03 ` Ada.Real_Time.Time_Last Simon Wright
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