From: Maciej Sobczak <no.spam@no.spam.com>
Subject: Re: Type safety, C++ and code generation
Date: Tue, 02 May 2006 17:05:17 +0200
Date: 2006-05-02T17:05:17+02:00 [thread overview]
Message-ID: <e37sfc$323$1@sunnews.cern.ch> (raw)
In-Reply-To: <1146576797.106931.267280@i40g2000cwc.googlegroups.com>
REH wrote:
>>>class R1 : ranged_type<int, 0, 100> {};
>>>class R2 : ranged_type<int, 0, 100> {};
>>>class R3 : ranged_type<int, 0, 101> {};
>>>
>>>to create new types.
>>
>>Except that those new types would be problematic to use with operations
>>that are already defined for ranged_type (especially those which return
>>ranged_type), because there is no implicit conversion to the derived class.
>
> That's not true. operators are usually defined using references.
As written above: "especially those which return ranged_type".
// some operation on the range type (can be a template)
ranged_type<int, 0, 100> foo() {/* ... */}
// some "new type"
class R : ranged_type<int, 0, 100> {};
R r = foo(); // bang!
--
Maciej Sobczak : http://www.msobczak.com/
Programming : http://www.msobczak.com/prog/
next prev parent reply other threads:[~2006-05-02 15:05 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-27 10:35 Type safety, C++ and code generation Maciej Sobczak
2006-04-27 13:19 ` REH
2006-04-27 14:08 ` Maciej Sobczak
2006-04-27 14:33 ` REH
2006-04-27 15:16 ` Maciej Sobczak
2006-04-27 15:39 ` Georg Bauhaus
2006-04-28 5:57 ` Maciej Sobczak
2006-04-28 12:16 ` Georg Bauhaus
2006-04-28 12:37 ` brian.b.mcguinness
2006-04-28 17:04 ` Georg Bauhaus
2006-04-28 18:50 ` Jeffrey R. Carter
2006-04-28 19:07 ` Randy Brukardt
2006-04-28 19:46 ` Robert A Duff
2006-04-28 19:55 ` Dmitry A. Kazakov
2006-04-29 21:28 ` Florian Weimer
2006-04-27 16:05 ` REH
2006-04-28 6:17 ` Maciej Sobczak
2006-04-30 14:40 ` adaworks
2006-04-30 15:23 ` REH
2006-04-30 18:14 ` Martin Krischik
2006-05-02 6:27 ` Maciej Sobczak
2006-05-02 13:33 ` REH
2006-05-02 15:05 ` Maciej Sobczak [this message]
2006-05-02 15:54 ` REH
2006-05-02 16:50 ` Martin Krischik
2006-05-02 19:50 ` REH
2006-04-27 14:47 ` REH
2006-04-27 15:10 ` REH
2006-04-28 6:22 ` Maciej Sobczak
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