[Dune] Feature request FieldVector

[Adrian Burri]

Hm, doesn't look like a clean solution either... But at least the mess 
stays confined in my own code, so I settle for this solution! 
(Nooooooobody touches the definition of FieldVector, alright?!)

Cheers

Adi

Oliver Sander wrote:

> Hi Adrian!
> If you claim to know details about the implementation of FieldVector,
> then you can get access to the underlying array by writing
>
> FieldVector<double, 69> aVector;
>
> double* array = &aVector[0];
>
> and there's no need to compromise the interface.  Of course this
> breaks if someone changes the implementation, but you may be willing
> to take that risk.
>
> -- 
> Oliver
>
> ************************************************************************
> * Oliver Sander                **                                      *
> * Freie Universität Berlin     ** email: sander at math.fu-berlin.de      *
> * Institut für Mathematik II   ** phone: + 49 (30) 838 75217           *
> * Arnimallee 2-6               ** fax  : + 49 (30) 838 54977           *
> * 14195 Berlin, Germany        ** URL  : www.math.fu-berlin.de/~sander *
> ************************************************************************
>
> On Tue, 1 Mar 2005, Adrian Burri wrote:
>
>> Hi all,
>>
>> I have a (probably quite controversial) feature request for the 
>> FieldVector: I'd like to have a method that gives me direct access to 
>> the underlying C-array, i.e. something like this
>> (&K)[n] array() { return p; }
>> I know this breaks encapsulation, it is a highly dangerous quirk and 
>> against all principles of good software engineering, but I am 
>> interfacing to a C-library for numerical flux functions and I don't 
>> intend to copy my range vectors (2*nQuadpoints*nElements*dimRange 
>> copies in one grid sweep...)
>> Those array() functions (the const and the non-const version) should 
>> of course be tagged with a large warning sign!
>>
>> I am interested to hear your opinion on this issue.
>>
>> Cheers
>>
>> Adi
>>
>> _______________________________________________
>> Dune mailing list
>> Dune at hal.iwr.uni-heidelberg.de
>> http://hal.iwr.uni-heidelberg.de/cgi-bin/mailman/listinfo/dune
>>