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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 <> 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

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