On Fri, Feb 24, 2012 at 11:15 AM, Oswin Krause < Oswin.Krause@ruhr-uni-bochum.de> wrote:
Hi,
Thanks for the reply!
http://www.boost.org/doc/libs/1_48_0/libs/iterator/doc/ReadableIterator.html
which states that, for a ReadableIterator i, *i must have a type convertible to the iterator's value_type. Further, for iterator_facade, the type of *i is the iterator's reference type. Therefore, reference must be convertible to value_type.
Proxy references are perfectly fine, you just have to ensure they interoperate well with (i.e., are convertible to) the iterator's value_type.
This sounds good.
So when I exchange my MatrixRow as reference type with
struct MatrixRowProxy:public MatrixRow //lazyness for the example :) { operator Vector(){ return Vector(*this); } }
and keep everything else untouched, like this:
struct MatrixIterator: public boost::iterator_facade< MatrixIterator, Vector, boost::random_access_traversal_tag, MatrixRowProxy
{ //as before };
Everything works? That would be really nice!
Well, the only way to be sure is to try it :) In this case I am happy and thank you very much for the hint to the
Definition :). This helped me a lot.
Great. Hopefully everything works out. Let us know if it doesn't. - Jeff