id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
9431,Problem compiling zip_iterator with clang and C++11,jonathan.jones@…,jeffrey.hellrung,"The following code fails to compile on OSX 10.8.5 with Xcode 5.0.1 and Boost 1.49.0.  This is not real world code, but it demonstrates the problem I'm facing.

{{{
#include <boost/iterator/zip_iterator.hpp>

template<typename T>
void foo()
{
    boost::zip_iterator<boost::tuple<T*> > iter;
    std::fill(iter, iter, boost::make_tuple(T()));
}

void bar()
{
    foo<int>();
}
}}}

Here are the commands I used to compile (if I drop ""-stdlib=libc++"" from the compile line, the code compiles just fine):

{{{
setenv DEVELOPER_DIR /Applications/Xcode5.0.1.app/Contents/Developer
xcrun -sdk macosx10.8 clang++ -c zip_iterator.cpp -I<boost-path>/include -std=c++11 -stdlib=libc++
}}}

and here is a heavily formatted snippet of the key error:

{{{
/Applications/Xcode5.0.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/algorithm:1824:1:
note: candidate function
    [with _RandomAccessIterator = boost::zip_iterator<boost::tuples::tuple<int *> >, _Tp = boost::tuples::tuple<int>]
not viable: no known conversion from
    'typename iterator_traits<zip_iterator<tuple<int *> > >::iterator_category'
    (aka 'boost::detail::iterator_category_with_traversal<std::__1::input_iterator_tag, boost::random_access_traversal_tag>')
to
    'std::__1::random_access_iterator_tag'
for 4th argument
    __fill(_RandomAccessIterator __first, _RandomAccessIterator __last, const _Tp& __value_, random_access_iterator_tag)
}}}

It appears as if the zip_iterator is not being converted to the correct iterator tag, which is why no calls to std::fill match.",Bugs,new,To Be Determined,iterator,Boost 1.49.0,Problem,,,