Re: [Boost-Users] Permutation Iterator Adaptor Problem

From: Peter Dimov (pdimov_at_[hidden])
Date: 2002-02-19 08:02:38

From: "Jeff Flinn - wwnet" <jflinn_at_[hidden]>
> I've discovered the difference between the
> http://www.boost.org/libs/utility/permutation_iterator.htm example and the
> http://www.boost.org/libs/utility/iterator_adaptor_test.cpp test code is
> that the former (along with the example below) use vector<int> as the
> element_range_type, while the latter uses deque<int>. In my environment,
> permutation iterator works when used with deques but doesn't compile using
> vector as exhibited below. I've copied the test case and replaced deque
with
> vector reproducing the problem.
>
> Again the compiler complains about "struct
> boost::detail::iterator_traits_::undefined<void>". Since Toon says that
the
> below code works with with gcc-2.95.3 as well as gcc-3.0.3, does any one
> know of MSVC vector issues that could be the source of this problem? I
will
> try this using MSVC and STLPORT this evening on another machine to see if
> the problem persists.

A possible cause of this problem is that vector iterators are plain pointers
in MSVC 6, and iterator_traits doesn't handle pointers on this compiler (no
partial specialization.)