Re: [boost] [iterators] zip_iterator doesn't work with GCC's TR1 tuple?

Subject: Re: [boost] [iterators] zip_iterator doesn't work with GCC's TR1 tuple?
From: David Abrahams (dave_at_[hidden])
Date: 2008-12-09 12:37:53

on Tue Dec 09 2008, David Abrahams <dave-AT-boostpro.com> wrote:

> on Tue Dec 09 2008, Peter Bartlett <pete-AT-pcbartlett.com> wrote:
>
>> Quoting Dean Michael Berris <mikhailberis_at_[hidden]>:
>>
>>> Has anybody successfully used Boost.Iterator's zip_iterator with TR1
>>> tuples from GCC's libstdc++?
>>>
>>> I keep getting errors like "error: no type named 'head_type' in 'class
>>> std::tr1::tuple<..." when using TR1 tuples with the zip_iterator
>>> implementation in Boost 1.35.0 -- am I missing something?
>>
>> The implementation of zip_iterator depends on the implementation of
>> (boost::)tuple. The authors of zip_iterator were aware this was  sub-optimal and
>> specifially put all tuple-implementation-specific code  in a namespace inside the
>> detail namespace to aid future changes. The code is fairly old though.. it would be
>> interesting to know if the  tuple concept is now mature enough to admit a generic
>> implementation.
>
> I have a fusion-based implementation checked in on a branch somewhere.

Here:

  http://svn.boost.org/svn/boost/branches/zip_iterator_fusion/boost/boost/iterator/zip_iterator.hpp

-- 
Dave Abrahams
BoostPro Computing
http://www.boostpro.com