STLはunique_ptrsのconst_iteratorを回転します

Question

私はunique_ptrの中でconst_iteratorでstd :: rotateを使うのに問題があります。

私が試みた：

std::vector<std::unique_ptr<Object> >::const_iterator middle; 
// middle is pointing at somewhere within vec defined elsewhere. 
std::rotate(vec.begin(), middle, vec.end()); 

コールは（...イテレータ、... const_iteratorの&、...イテレータ）

を回転させるためにこれが該当する機能をもたらし、したがって、私が試しこれは： std :: vector :: const_iterator first = vec.begin（）; std :: vector :: const_iterator last = vec.end（）; std :: rotate（最初、中、最後）;

次に、以下に示す一連のエラーメッセージが表示されます。 これはバグですか、私は間違いをしましたか？ rotateは、指定された範囲の要素を変化するため

In file included from /usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/algorithm:63:0, 
      from file.cpp:8: 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/unique_ptr.h: In function ‘void std::__rotate(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, std::random_access_iterator_tag) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >]’: 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algo.h:1677:7: instantiated from ‘void std::rotate(_FIter, _FIter, _FIter) [with _FIter = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >]’ 
file.cpp:76:35: instantiated from here 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/unique_ptr.h:207:7: error: deleted function ‘std::unique_ptr<_Tp, _Tp_Deleter>::unique_ptr(const std::unique_ptr<_Tp, _Tp_Deleter>&) [with _Tp = Object, _Tp_Deleter = std::default_delete<Object>, std::unique_ptr<_Tp, _Tp_Deleter> = std::unique_ptr<Object>]’ 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algo.h:1601:22: error: used here 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algo.h:1677:7: instantiated from ‘void std::rotate(_FIter, _FIter, _FIter) [with _FIter = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >]’ 
file.cpp:76:35: instantiated from here 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algo.h:1603:5: error: passing ‘const std::unique_ptr<Object>’ as ‘this’ argument of ‘std::unique_ptr<_Tp, _Tp_Deleter>& std::unique_ptr<_Tp, _Tp_Deleter>::operator=(std::unique_ptr<_Tp, _Tp_Deleter>&&) [with _Tp = Object, _Tp_Deleter = std::default_delete<Object>, std::unique_ptr<_Tp, _Tp_Deleter> = std::unique_ptr<Object>]’ discards qualifiers 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algo.h:1677:7: instantiated from ‘void std::rotate(_FIter, _FIter, _FIter) [with _FIter = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >]’ 
file.cpp:76:35: instantiated from here 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/unique_ptr.h:207:7: error: deleted function ‘std::unique_ptr<_Tp, _Tp_Deleter>::unique_ptr(const std::unique_ptr<_Tp, _Tp_Deleter>&) [with _Tp = Object, _Tp_Deleter = std::default_delete<Object>, std::unique_ptr<_Tp, _Tp_Deleter> = std::unique_ptr<Object>]’ 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algo.h:1624:22: error: used here 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algo.h:1677:7: instantiated from ‘void std::rotate(_FIter, _FIter, _FIter) [with _FIter = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >]’ 
file.cpp:76:35: instantiated from here 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algo.h:1626:5: error: passing ‘const std::unique_ptr<Object>’ as ‘this’ argument of ‘std::unique_ptr<_Tp, _Tp_Deleter>& std::unique_ptr<_Tp, _Tp_Deleter>::operator=(std::unique_ptr<_Tp, _Tp_Deleter>&&) [with _Tp = Object, _Tp_Deleter = std::default_delete<Object>, std::unique_ptr<_Tp, _Tp_Deleter> = std::unique_ptr<Object>]’ discards qualifiers 
In file included from /usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_tree.h:62:0, 
      from /usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/map:60, 
      from dir/file3.hpp:4, 
      from dir/file2.hpp:3, 
      from file.hpp:3, 
      from file.cpp:1: 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/unique_ptr.h: In static member function ‘static void std::__iter_swap<_BoolType>::iter_swap(_ForwardIterator1, _ForwardIterator2) [with _ForwardIterator1 = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >, _ForwardIterator2 = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >, bool _BoolType = false]’: 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algobase.h:138:7: instantiated from ‘void std::iter_swap(_ForwardIterator1, _ForwardIterator2) [with _ForwardIterator1 = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >, _ForwardIterator2 = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >]’ 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algo.h:1609:5: instantiated from ‘void std::__rotate(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, std::random_access_iterator_tag) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >]’ 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algo.h:1677:7: instantiated from ‘void std::rotate(_FIter, _FIter, _FIter) [with _FIter = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >]’ 
file.cpp:76:35: instantiated from here 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/unique_ptr.h:207:7: error: deleted function ‘std::unique_ptr<_Tp, _Tp_Deleter>::unique_ptr(const std::unique_ptr<_Tp, _Tp_Deleter>&) [with _Tp = Object, _Tp_Deleter = std::default_delete<Object>, std::unique_ptr<_Tp, _Tp_Deleter> = std::unique_ptr<Object>]’ 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algobase.h:88:31: error: used here 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algobase.h:89:11: error: passing ‘const std::unique_ptr<Object>’ as ‘this’ argument of ‘std::unique_ptr<_Tp, _Tp_Deleter>& std::unique_ptr<_Tp, _Tp_Deleter>::operator=(const std::unique_ptr<_Tp, _Tp_Deleter>&) [with _Tp = Object, _Tp_Deleter = std::default_delete<Object>, std::unique_ptr<_Tp, _Tp_Deleter> = std::unique_ptr<Object>]’ discards qualifiers 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/unique_ptr.h:208:19: error: deleted function ‘std::unique_ptr<_Tp, _Tp_Deleter>& std::unique_ptr<_Tp, _Tp_Deleter>::operator=(const std::unique_ptr<_Tp, _Tp_Deleter>&) [with _Tp = Object, _Tp_Deleter = std::default_delete<Object>, std::unique_ptr<_Tp, _Tp_Deleter> = std::unique_ptr<Object>]’ 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algobase.h:89:11: error: used here 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algobase.h:90:11: error: passing ‘const std::unique_ptr<Object>’ as ‘this’ argument of ‘std::unique_ptr<_Tp, _Tp_Deleter>& std::unique_ptr<_Tp, _Tp_Deleter>::operator=(std::unique_ptr<_Tp, _Tp_Deleter>&&) [with _Tp = Object, _Tp_Deleter = std::default_delete<Object>, std::unique_ptr<_Tp, _Tp_Deleter> = std::unique_ptr<Object>]’ discards qualifiers 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algobase.h: In static member function ‘static _OI std::__copy_move<true, false, std::random_access_iterator_tag>::__copy_m(_II, _II, _OI) [with _II = const std::unique_ptr<Object>*, _OI = const std::unique_ptr<Object>*]’: 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algobase.h:404:70: instantiated from ‘_OI std::__copy_move_a(_II, _II, _OI) [with bool _IsMove = true, _II = const std::unique_ptr<Object>*, _OI = const std::unique_ptr<Object>*]’ 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algobase.h:442:39: instantiated from ‘_OI std::__copy_move_a2(_II, _II, _OI) [with bool _IsMove = true, _II = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >, _OI = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >]’ 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algobase.h:506:47: instantiated from ‘_OI std::move(_II, _II, _OI) [with _II = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >, _OI = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >]’ 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algo.h:1602:5: instantiated from ‘void std::__rotate(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, std::random_access_iterator_tag) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >]’ 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algo.h:1677:7: instantiated from ‘void std::rotate(_FIter, _FIter, _FIter) [with _FIter = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >]’ 
file.cpp:76:35: instantiated from here 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algobase.h:368:8: error: passing ‘const std::unique_ptr<Object>’ as ‘this’ argument of ‘std::unique_ptr<_Tp, _Tp_Deleter>& std::unique_ptr<_Tp, _Tp_Deleter>::operator=(const std::unique_ptr<_Tp, _Tp_Deleter>&) [with _Tp = Object, _Tp_Deleter = std::default_delete<Object>, std::unique_ptr<_Tp, _Tp_Deleter> = std::unique_ptr<Object>]’ discards qualifiers 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/unique_ptr.h:208:19: error: deleted function ‘std::unique_ptr<_Tp, _Tp_Deleter>& std::unique_ptr<_Tp, _Tp_Deleter>::operator=(const std::unique_ptr<_Tp, _Tp_Deleter>&) [with _Tp = Object, _Tp_Deleter = std::default_delete<Object>, std::unique_ptr<_Tp, _Tp_Deleter> = std::unique_ptr<Object>]’ 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algobase.h:368:8: error: used here 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algobase.h: In static member function ‘static _BI2 std::__copy_move_backward<true, false, std::random_access_iterator_tag>::__copy_move_b(_BI1, _BI1, _BI2) [with _BI1 = const std::unique_ptr<Object>*, _BI2 = const std::unique_ptr<Object>*]’: 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algobase.h:601:18: instantiated from ‘_BI2 std::__copy_move_backward_a(_BI1, _BI1, _BI2) [with bool _IsMove = true, _BI1 = const std::unique_ptr<Object>*, _BI2 = const std::unique_ptr<Object>*]’ 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algobase.h:610:34: instantiated from ‘_BI2 std::__copy_move_backward_a2(_BI1, _BI1, _BI2) [with bool _IsMove = true, _BI1 = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >, _BI2 = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >]’ 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algobase.h:681:15: instantiated from ‘_BI2 std::move_backward(_BI1, _BI1, _BI2) [with _BI1 = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >, _BI2 = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >]’ 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algo.h:1625:5: instantiated from ‘void std::__rotate(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, std::random_access_iterator_tag) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >]’ 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algo.h:1677:7: instantiated from ‘void std::rotate(_FIter, _FIter, _FIter) [with _FIter = __gnu_cxx::__normal_iterator<const std::unique_ptr<Object>*, std::vector<std::unique_ptr<Object> > >]’ 
file.cpp:76:35: instantiated from here 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algobase.h:566:6: error: passing ‘const std::unique_ptr<Object>’ as ‘this’ argument of ‘std::unique_ptr<_Tp, _Tp_Deleter>& std::unique_ptr<_Tp, _Tp_Deleter>::operator=(const std::unique_ptr<_Tp, _Tp_Deleter>&) [with _Tp = Object, _Tp_Deleter = std::default_delete<Object>, std::unique_ptr<_Tp, _Tp_Deleter> = std::unique_ptr<Object>]’ discards qualifiers 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/unique_ptr.h:208:19: error: deleted function ‘std::unique_ptr<_Tp, _Tp_Deleter>& std::unique_ptr<_Tp, _Tp_Deleter>::operator=(const std::unique_ptr<_Tp, _Tp_Deleter>&) [with _Tp = Object, _Tp_Deleter = std::default_delete<Object>, std::unique_ptr<_Tp, _Tp_Deleter> = std::unique_ptr<Object>]’ 
/usr/lib/gcc/x86_64-redhat-linux/4.5.1/../../../../include/c++/4.5.1/bits/stl_algobase.h:566:6: error: used here 
make: *** [file.o] Error 1 

Answer 1

あなたは、const_iterator秒でrotateを使用することはできません。代わりに、iteratorを使用する必要があります。

Answer 2

cplusplus documentationはtrustedにする場合は、あなたがconst_iterator Sを使用することはできませんので、その後rotate基本的に、swap(T &, T &)を呼び出します。

（私は1つがconst_iteratorsで動作リストのrotateの特殊なバージョンのために頼むかもしれないと仮定します。私はあなたがが、かなり簡単に1を構築することができると思います。）