Re: [Boost-users] Compile errors using make_zip_iterator

From: David Abrahams (dave_at_[hidden])
Date: 2005-07-08 10:23:22

"Dalton, Barnaby" <Barnaby.Dalton_at_[hidden]> writes:

> I'm using MSVC 7.1 and am getting masses of compile errors with the
> following code (see end of message for the errors):
>
> #include <boost/iterator/zip_iterator.hpp>
> #include <vector>
> #include <functional>
> #include <boost/detail/workaround.hpp>
>   
> int main( void )
> {
>   
>   std::vector<double> vect1(3);
>   std::vector<double> vect2(3);
>   
> //    boost::zip_iterator<
> //      boost::tuples::tuple<
> //        std::vector<double>::const_iterator, 
> //        std::vector<double>::const_iterator
> //        > 
> //      >
> //    zip_it_begin(
> //      boost::make_tuple(
> //       vect1.begin(),
> //       vect2.begin()
> //       )
> //    );
>
>   std::vector<boost::tuples::tuple<double, double> >
>     vect_of_tuples(3);
>
>   std::copy(
>     boost::make_zip_iterator(
>     boost::make_tuple(
>       vect1.begin(), 
>       vect2.begin()
>       )
>     ),
>     boost::make_zip_iterator(
>     boost::make_tuple(
>       vect1.end(), 
>       vect2.end()
>       )
>     ),
>     vect_of_tuples.begin()
>       );
>
>   return 0;
> }
>
> If I uncomment the earlier instantiation of zip_it_begin then it
> compiles without any errors! I'm guessing this is some kind of compiler
> bug but and am wondering what the correct/most elegant workaround
> is? 

Well, I don't know, but if you haven't already done so you might try
the latest Boost CVS instead of 1.32.  If the problem disappears that
would be the easiest solution.

> Do I have make sure I manually declare a zip_iterator somewhere
> before using make_zip_iterator?

Can't tell ya.  I do note that the one you declared is using constant
iterators while the one you're building with make_zip_iterator is
using mutable iterators.

Sorry I'm not more clue-ful here.  This looks like a good question for
Microsoft support ;-)

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com