[Dune] Feature request FieldVector

[Adrian Burri]

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