id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
12087	transform_iterator is not assignable in VS2015	bswerts@…	jeffrey.hellrung	"The following code does not compile in Visual Studio 2015 because the assignment operator of transform_iterator seems to be deleted:

#include ""boost/iterator/transform_iterator.hpp""
#include <vector>
int main()
{
   auto v = std::vector<int>{};
   auto it = boost::make_transform_iterator(std::begin(v), [](int) { return 1; });

   it = it;

   return 0;
}

The line 'it = it' is the culprit, giving
error C2280: 'boost::iterators::transform_iterator<main::<lambda_245a5d22fdccfa4a35ac6bb4a4dc8307>,std::_Vector_iterator<std::_Vector_val<std::_Simple_types<int>>>,boost::iterators::use_default,boost::iterators::use_default> &boost::iterators::transform_iterator<main::<lambda_245a5d22fdccfa4a35ac6bb4a4dc8307>,std::_Vector_iterator<std::_Vector_val<std::_Simple_types<int>>>,boost::iterators::use_default,boost::iterators::use_default>::operator =(const boost::iterators::transform_iterator<main::<lambda_245a5d22fdccfa4a35ac6bb4a4dc8307>,std::_Vector_iterator<std::_Vector_val<std::_Simple_types<int>>>,boost::iterators::use_default,boost::iterators::use_default> &)': attempting to reference a deleted function
boost\iterator\transform_iterator.hpp(127): note: compiler has generated 'boost::iterators::transform_iterator<main::<lambda_245a5d22fdccfa4a35ac6bb4a4dc8307>,std::_Vector_iterator<std::_Vector_val<std::_Simple_types<int>>>,boost::iterators::use_default,boost::iterators::use_default>::operator =' here

I assume iterators need to be assignable. Furthermore I see no reason why the compiler wouldn't generate the standard member functions. Everything compiles OK in VS2013.

Thanks in advance for having a look.
Regards,
Ben"	Bugs	new	To Be Determined	iterator	Boost 1.60.0	Problem