dolfin team mailing list archive

[Ola Skavhaug <skavhaug@xxxxxxxxx>]

Dag Lindbo skrev den 09/04-2008 følgende:
> Hello again!
> 
> Why is it not possible any longer to get the Vector associated with a 
> Function? E.g:
> 
> #include <dolfin.h>
> using namespace dolfin;
> 
> int main()
> {
>    Function u;
>    Vector& v = u.vector();
> }

int main()
{
     Function u;
     Vector v;
     v = u.vector();
     return 0;
}

Should work. A Function returns a GenericVector reference, and the Vector
reference needs to be a Vector. Then the operator= in Vector is applied in the
assignment.

Ola
 
> error: invalid initialization of reference of type ‘dolfin::Vector&’ 
> from expression of type ‘dolfin::GenericVector’
> 
> na55:cpp > scons
> c++ -o test.o -c -Wall -pipe -ansi -g -Werror -O2 -pthread -DDEBUG 
> -DNDEBUG -DPACKAGE_VERSION="0.7.2" -DHAS_UMFPACK=1 -DHAS_GTS=1 
> -I/usr/local/include 
> -I/usr/lib/python2.5/site-packages/numpy/core/include 
> -I/usr/include/suitesparse -I/usr/include/python2.5 
> -I/usr/include/libxml2 -I/usr/include/glib-2.0 
> -I/usr/lib/glib-2.0/include test.cpp
> test.cpp: In function ‘int main()’:
> test.cpp:8: error: invalid initialization of reference of type 
> ‘dolfin::Vector&’ from expression of type ‘dolfin::GenericVector’
> cc1plus: warnings being treated as errors
> test.cpp:8: warning: unused variable ‘v’
> scons: *** [test.o] Error 1
> 
> I hope this functionality hasn't been removed.
> 
> /Dag
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