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 12:35:59

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.

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