Re: [boost] [Range] problem with permuation_iterator (constness)

From: Neal Becker (ndbecker2_at_[hidden])
Date: 2006-11-06 11:42:27

David Abrahams wrote:

> Neal Becker <ndbecker2_at_[hidden]> writes:
> 
>> This simple test illustrates the problem:
>>
>> #include <boost/iterator/permutation_iterator.hpp>
>> #include <vector>
>> #include <boost/range.hpp>
>>
>> template<typename in_t>
>> void F (in_t const& in) {
>>   typename boost::range_const_iterator<in_t>::type inp = boost::begin
>>   (in);
>> }
>>
>> int main () {
>>   std::vector<int> x, y;
>>   F (boost::make_permutation_iterator (boost::begin (x), boost::begin
>>   (y)));
>> }
>>
>> /usr/local/src/boost.hg/boost/range/const_iterator.hpp:37: error: no type
>> named
>> const_iterator in class
>> boost::permutation_iterator<__gnu_cxx::__normal_iterator<int*,
>> std::vector<int, std::allocator<int> > >,
>> __gnu_cxx::__normal_iterator<int*, std::vector<int, std::allocator<int> >
>> >
>>>
> 
> This has nothing to do with permutation iterator at all.  An iterator
> is not expected to have a const_iterator member.  It looks for all the
> world like user error: F expects a model of Range, and you're just
> passing a model of Iterator.
> 

Yes, thanks, I meant to pass a range.  I should stop posting early Monday morning.