Re: [eigen] Interesting C++ standard proposal

[Ilja Honkonen <ilja.honkonen@xxxxxxxxxxx>]

> > auto a = A.block(...);
> > does the user want a copy of the submatrix or a lightweight view?
> Actually, an even more trivial example would be this:
> auto B = A; // is B a reference or a copy?

Isn't auto& always needed in order to get a reference to a C++ or STL 
object? It would be surprising if eigen behaved differently.

Ilja