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Groups > comp.lang.c++ > #8652
| From | "Randy Brukardt" <randy@rrsoftware.com> |
|---|---|
| Newsgroups | comp.lang.c++, comp.lang.ada |
| Subject | Re: Why use C++? |
| Date | 2011-08-10 17:37 -0500 |
| Organization | Jacob Sparre Andersen Research & Innovation |
| Message-ID | <j1v17b$h98$1@munin.nbi.dk> (permalink) |
| References | (1 earlier) <j1kaj8$dge$1@adenine.netfront.net> <1e292299-2cbe-4443-86f3-b19b8af50fff@c29g2000yqd.googlegroups.com> <j1tha5$11q5$1@adenine.netfront.net> <1fd0cc9b-859d-428e-b68a-11e34de84225@gz10g2000vbb.googlegroups.com> <9ag33sFmuaU1@mid.individual.net> |
Cross-posted to 2 groups.
"Niklas Holsti" <niklas.holsti@tidorum.invalid> wrote in message
news:9ag33sFmuaU1@mid.individual.net...
...
> In what way does Ada (95, or the current standard 2005) not support your
> needs for unsigned types?
I'm not the OP, but...
> If you dislike the wrapping behaviour of the Ada "modular" unsigned types,
> what is wrong with defining your own unsigned integer type in Ada, as in
>
> type My_Number is range 0 .. 53621;
This does not work on the largest unsigned integer type (mod 2**32 in
Janus/Ada). Ada 95 requires
type My_Number is range 0 .. 2**32-1;
to be rejected, as the upper bound exceeds Max_Int. (This is technically a
"signed_integer_type_definition", which shows the cause of the problem.)
The Janus/Ada intermediate code can generate overflow checks for the largest
integer type, but I've failed to find any reasonable way to model such a
type in Ada (assuming we want a real integer type, with numeric literals).
The closest is the "non-standard integer type" is 3.5.4(26) -- but why
should such a basic need be "non-standard"? And having it "non-standard"
means that you can't use type declarations like the above to use it. Yuck.
There are uses for wrapping types, but they are far less likely than wanting
overflow detection. The default should be to catch errors, not turn them
into different ones.
Too late to fix, unfortunately.
Randy.
> or whatever range you need. This gives you non-wrapping arithmetic with
> run-time checks for overflow, underflow, and range.
>
> --
> Niklas Holsti
> Tidorum Ltd
> niklas holsti tidorum fi
> . @ .
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Why use C++? Miro <nickbergeronsemail@gmail.com> - 2011-08-06 14:00 -0700
Re: Why use C++? "Paul" <pchristor@yahoo.co.uk> - 2011-08-06 22:09 +0100
Re: Why use C++? Stuart Redmann <DerTopper@web.de> - 2011-08-10 00:39 -0700
Re: Why use C++? "Paul" <pchristor@yahoo.co.uk> - 2011-08-10 09:59 +0100
Re: Why use C++? Stuart Redmann <DerTopper@web.de> - 2011-08-10 07:09 -0700
Re: Why use C++? "Paul" <pchristor@yahoo.co.uk> - 2011-08-10 17:22 +0100
Re: Why use C++? Niklas Holsti <niklas.holsti@tidorum.invalid> - 2011-08-10 22:05 +0300
Re: Why use C++? "Randy Brukardt" <randy@rrsoftware.com> - 2011-08-10 17:37 -0500
Re: Why use C++? Ludovic Brenta <ludovic@ludovic-brenta.org> - 2011-08-11 00:49 +0200
Re: Why use C++? "Randy Brukardt" <randy@rrsoftware.com> - 2011-08-11 23:54 -0500
Re: Why use C++? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2011-08-11 09:54 +0200
Re: Why use C++? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2011-08-11 11:13 +0200
Re: Why use C++? Georg Bauhaus <rm.dash-bauhaus@futureapps.de> - 2011-08-11 13:43 +0200
Re: Why use C++? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2011-08-11 17:09 +0200
Re: Why use C++? Georg Bauhaus <rm.dash-bauhaus@futureapps.de> - 2011-08-12 10:32 +0200
Re: Why use C++? Hyman Rosen <hyrosen@mail.com> - 2011-08-12 09:15 -0400
Re: Why use C++? "Randy Brukardt" <randy@rrsoftware.com> - 2011-08-12 17:09 -0500
Re: Why use C++? Georg Bauhaus <rm.dash-bauhaus@futureapps.de> - 2011-08-12 19:20 +0200
Re: Why use C++? Ludovic Brenta <ludovic@ludovic-brenta.org> - 2011-08-12 23:22 +0200
Re: Why use C++? Ludovic Brenta <ludovic@ludovic-brenta.org> - 2011-08-16 06:06 -0700
Re: Why use C++? Georg Bauhaus <rm.dash-bauhaus@futureapps.de> - 2011-08-13 11:37 +0200
Re: Why use C++? Georg Bauhaus <rm.dash-bauhaus@futureapps.de> - 2011-08-13 12:27 +0200
Re: Why use C++? Georg Bauhaus <rm.dash-bauhaus@futureapps.de> - 2011-08-15 13:38 +0200
Re: Why use C++? Georg Bauhaus <rm.dash-bauhaus@futureapps.de> - 2011-08-13 13:02 +0200
Re: Why use C++? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2011-08-12 11:21 +0200
Re: Why use C++? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2011-08-12 16:30 +0200
Re: Why use C++? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2011-08-12 22:05 +0200
Re: Why use C++? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2011-08-13 11:15 +0200
Re: Why use C++? Ian Collins <ian-news@hotmail.com> - 2011-08-13 21:29 +1200
Re: Why use C++? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2011-08-13 11:52 +0200
Re: Why use C++? Ian Collins <ian-news@hotmail.com> - 2011-08-13 23:10 +1200
Re: Why use C++? Georg Bauhaus <rm.dash-bauhaus@futureapps.de> - 2011-08-13 13:46 +0200
Re: Why use C++? Ian Collins <ian-news@hotmail.com> - 2011-08-14 08:30 +1200
Re: Why use C++? Brian Drummond <brian@shapes.demon.co.uk> - 2011-08-13 11:54 +0000
Re: Why use C++? Simon Wright <simon@pushface.org> - 2011-08-13 14:12 +0100
Re: Why use C++? Brian Drummond <brian@shapes.demon.co.uk> - 2011-08-14 11:01 +0000
Re: Why use C++? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2011-08-14 08:46 +0200
Re: Why use C++? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2011-08-14 08:51 +0200
Re: Why use C++? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2011-08-14 09:29 +0200
Re: Why use C++? Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-08-16 01:18 -0700
Re: Why use C++? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2011-08-16 10:47 +0200
Re: Why use C++? Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-08-16 02:52 -0700
Re: Why use C++? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2011-08-16 12:39 +0200
Re: Why use C++? Georg Bauhaus <rm.dash-bauhaus@futureapps.de> - 2011-08-16 12:23 +0200
Re: Why use C++? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2011-08-16 12:58 +0200
Re: Why use C++? Georg Bauhaus <rm.dash-bauhaus@futureapps.de> - 2011-08-16 13:44 +0200
Re: Why use C++? Bill Findlay <yaldnif.w@blueyonder.co.uk> - 2011-08-16 15:51 +0100
Re: Why use C++? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2011-08-16 21:13 +0200
Re: Why use C++? Bill Findlay <yaldnif.w@blueyonder.co.uk> - 2011-08-16 20:23 +0100
Re: Why use C++? "Randy Brukardt" <randy@rrsoftware.com> - 2011-08-12 00:02 -0500
Re: Why use C++? Robert Wessel <robertwessel2@yahoo.com> - 2011-08-12 00:16 -0500
Re: Why use C++? Adam Beneschan <adam@irvine.com> - 2011-08-12 09:39 -0700
Re: Why use C++? Paavo Helde <myfirstname@osa.pri.ee> - 2011-08-12 01:51 -0500
Re: Why use C++? Georg Bauhaus <rm.dash-bauhaus@futureapps.de> - 2011-08-12 09:41 +0200
Re: Why use C++? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2011-08-12 11:40 +0200
Re: Why use C++? Stuart Redmann <DerTopper@web.de> - 2011-08-12 04:48 -0700
Re: Why use C++? "Vinzent Hoefler" <0439279208b62c95f1880bf0f8776eeb@t-domaingrabbing.de> - 2011-08-12 15:12 +0200
Re: Why use C++? Stuart Redmann <DerTopper@web.de> - 2011-08-12 08:50 -0700
Re: Why use C++? Bill Findlay <yaldnif.w@blueyonder.co.uk> - 2011-08-12 18:02 +0100
Re: Why use C++? "Vinzent Hoefler" <0439279208b62c95f1880bf0f8776eeb@t-domaingrabbing.de> - 2011-08-15 14:59 +0200
Re: Why use C++? Louisa <louisa.hutch@gmail.com> - 2011-08-18 06:39 -0700
Re: Why use C++? Colin Paul Gloster <Colin_Paul_Gloster@ACM.org> - 2011-08-11 10:02 +0000
Re: Why use C++? Dombo <dombo@disposable.invalid> - 2011-08-11 20:20 +0200
Re: Why use C++? Lynn McGuire <lmc@winsim.com> - 2011-08-11 14:50 -0500
Re: Why use C++? Dombo <dombo@disposable.invalid> - 2011-08-12 19:22 +0200
Re: Why use C++? Miro <nickbergeronsemail@gmail.com> - 2011-08-13 08:37 -0700
Re: Why use C++? Ian Collins <ian-news@hotmail.com> - 2011-08-14 08:38 +1200
Re: Why use C++? Ian Collins <ian-news@hotmail.com> - 2011-08-14 10:41 +1200
Re: Why use C++? Jorgen Grahn <grahn+nntp@snipabacken.se> - 2011-08-14 07:26 +0000
Re: Why use C++? Ian Collins <ian-news@hotmail.com> - 2011-08-14 20:18 +1200
Re: Why use C++? Jorgen Grahn <grahn+nntp@snipabacken.se> - 2011-08-14 09:00 +0000
Re: Why use C++? Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-08-16 02:10 -0700
Re: Why use C++? Ian Collins <ian-news@hotmail.com> - 2011-08-16 21:25 +1200
Re: Why use C++? Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-08-16 02:54 -0700
Re: Why use C++? Ian Collins <ian-news@hotmail.com> - 2011-08-16 22:04 +1200
Re: Why use C++? Ian Collins <ian-news@hotmail.com> - 2011-08-07 09:10 +1200
Re: Why use C++? "Paul" <pchristor@yahoo.co.uk> - 2011-08-06 22:13 +0100
Re: Why use C++? Juha Nieminen <nospam@thanks.invalid> - 2011-08-07 09:09 +0000
Re: Why use C++? "Paul" <pchristor@yahoo.co.uk> - 2011-08-07 12:37 +0100
Re: Why use C++? Juha Nieminen <nospam@thanks.invalid> - 2011-08-07 14:52 +0000
Re: Why use C++? "Paul" <pchristor@yahoo.co.uk> - 2011-08-07 20:21 +0100
Re: Why use C++? Lynn McGuire <lmc@winsim.com> - 2011-08-06 16:29 -0500
Re: Why use C++? Jorgen Grahn <grahn+nntp@snipabacken.se> - 2011-08-07 09:35 +0000
Re: Why use C++? "crea" <no@invalid.com> - 2011-08-07 13:40 +0100
Re: Why use C++? Dombo <dombo@disposable.invalid> - 2011-08-07 15:12 +0200
Re: Why use C++? Juha Nieminen <nospam@thanks.invalid> - 2011-08-07 14:55 +0000
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