Re: [boost] boost/multi_array/iterator_adaptors.hpp?

From: Ronald Garcia (garcia_at_[hidden])
Date: 2002-07-13 10:19:00

On Fri, 12 Jul 2002, David Abrahams wrote:

> Can someone explain why we have a near-duplicate of
> boost/iterator_adaptors.hpp in the multi_array/ directory?
>

Boost MultiArray uses iterator_adaptors to implement its iterators.
The iterator category is std::input_iterator_tag because operator* does not
return a reference type.  As a result, iterator_adaptors's implementation
of operator-> essentially returns a value_type.  My iterators have
distinct reference and value_type types, which iterator_adaptors cannot
recognize, and I needed operator-> to return the reference rather
than the value_type type. In order to do that, I needed to include a
modified copy of iterator_adaptors in my code base (in the
boost::detail::multi_array namespace).

Cheers,

Ron