References in D
Michael
pr at m1xa.com
Fri Oct 5 14:09:04 PDT 2012
On Saturday, 15 September 2012 at 12:38:53 UTC, Henning Pohl
wrote:
> The way D is dealing with classes reminds me of pointers
> because you can null them. C++'s references cannot (of course
> you can do some nasty casting). So you can be sure to have a
> valid well-defined object. But then there is always the
> ownership problem which renders them more dangerous as they
> seem to be. D resolves this problem using a garbage collector.
>
> So why not combine the advantages of C++ references "always
> there" guarantee and D's garbage collector and make D's
> references not nullable? If you want it to be nullable, you can
> still make use of real pointers. Pointers can be converted to
> references by implicitly do a runtime check if the pointer is
> not null and references can be converted back to pointers.
>
> I guess you had good reasons about choosing the nullable
> version of D references. Explain it to me, please.
Just some links.
Info at least from 2004.
http://blogs.msdn.com/b/ericlippert/archive/2012/07/17/should-c-warn-on-null-dereference.aspx
http://blogs.msdn.com/b/cyrusn/archive/2005/04/25/411617.aspx
http://devtalk.net/csharp/chained-null-checks-and-the-maybe-monad/
google "site:msdn.com non nullable"
Personaly I think that "right tool/pattern for right job/task" is
best solution. Maybe problem not in nullable references.
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