[Boost-bugs] [Boost C++ Libraries] #12087: transform_iterator is not assignable in VS2015

Subject: [Boost-bugs] [Boost C++ Libraries] #12087: transform_iterator is not assignable in VS2015
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2016-03-22 13:55:07

#12087: transform_iterator is not assignable in VS2015
------------------------------+------------------------------
 Reporter:  bswerts@…         |      Owner:  jeffrey.hellrung
     Type:  Bugs              |     Status:  new
Milestone:  To Be Determined  |  Component:  iterator
  Version:  Boost 1.60.0      |   Severity:  Problem
 Keywords:                    |
------------------------------+------------------------------
 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

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/12087>
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