c++深度复制指针到带有指针值的映射

我在深度复制指针到指针值的映射时遇到了一点麻烦。

std::map<string, TH1D*>* m_hist_split;

我当前的方法:

我正在使用一个类模板，它复制映射对并在堆上初始化对的值。然后模板返回一个map::type_value

#ifndef DEEPCOPY_H
#define DEEPCOPY_H
#include <map>
#include <algorithm>
namespace DeepCopy{
  template<class A, class B>
    struct MapPointerValue{
      typedef typename std::map< A, B* >::value_type map_t;
      map_t operator() (map_t p){
        return std::make_pair(p.first, new B(*p.second) );
      }
    };
...
...
}
#endif

然后，在复制构造函数中，我尝试将指针深度复制到指针值的映射。

Cutflow::Cutflow(const Cutflow& cpy){
m_hist_split = new map<string, TH1D*>;
transform(cpy.m_hist_split->begin(),cpy.m_hist_split->end(), inserter(m_hist_split, m_hist_split->begin()), DeepCopy::MapPointerValue<string, TH1D>() );
...
...
}

当编译时，我得到一个丑陋的错误:-(: )

Compiling src/Cutflow.cxx to obj/Cutflow.o
x86_64-slc5-gcc34-opt/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.3.2/../../../../include/c++/4.3.2/bits/stl_iterator.h: In instantiation of 'std::insert_iterator<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*>':
src/Cutflow.cxx:42:   instantiated from here
x86_64-slc5-gcc34-opt/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.3.2/../../../../include/c++/4.3.2/bits/stl_iterator.h:562: error: 'std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*' is not a class, struct, or union type
x86_64-slc5-gcc34-opt/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.3.2/../../../../include/c++/4.3.2/bits/stl_iterator.h:572: error: 'std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*' is not a class, struct, or union type
x86_64-slc5-gcc34-opt/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.3.2/../../../../include/c++/4.3.2/bits/stl_iterator.h:599: error: 'std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*' is not a class, struct, or union type
x86_64-slc5-gcc34-opt/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.3.2/../../../../include/c++/4.3.2/bits/stl_iterator.h:608: error: 'std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*' is not a class, struct, or union type
x86_64-slc5-gcc34-opt/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.3.2/../../../../include/c++/4.3.2/bits/stl_iterator.h: In function 'std::insert_iterator<_Container> std::inserter(_Container&, _Iterator) [with _Container = std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*, _Iterator = std::_Rb_tree_iterator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> >]':
src/Cutflow.cxx:42:   instantiated from here
x86_64-slc5-gcc34-opt/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.3.2/../../../../include/c++/4.3.2/bits/stl_iterator.h:648: error: 'std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*' is not a class, struct, or union type
x86_64-slc5-gcc34-opt/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.3.2/../../../../include/c++/4.3.2/bits/stl_algo.h: In function '_OIter std::transform(_IIter, _IIter, _OIter, _UnaryOperation) [with _IIter = std::_Rb_tree_iterator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> >, _OIter = std::insert_iterator<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*>, _UnaryOperation = DeepCopy::MapPointerValue<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D>]':
src/Cutflow.cxx:42:   instantiated from here
x86_64-slc5-gcc34-opt/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.3.2/../../../../include/c++/4.3.2/bits/stl_algo.h:4281: error: no match for 'operator=' in '__result.std::insert_iterator<_Container>::operator* [with _Container = std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*]() = DeepCopy::MapPointerValue<A, B>::operator()(typename std::map<A, B*, std::less<_Key>, std::allocator<std::pair<const A, B*> > >::value_type) [with A = std::basic_string<char, std::char_traits<char>, std::allocator<char> >, B = TH1D](std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*>(((const std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*>&)((const std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*>*)__first.std::_Rb_tree_iterator<_Tp>::operator* [with _Tp = std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*>]()))))'
x86_64-slc5-gcc34-opt/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.3.2/../../../../include/c++/4.3.2/bits/stl_iterator.h:559: note: candidates are: std::insert_iterator<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*>& std::insert_iterator<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*>::operator=(const std::insert_iterator<std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, TH1D*> > >*>&)

你知道我做错了什么吗?

,

是我所做的正确吗?

: -

transform(cpy.m_hist_split->begin(),cpy.m_hist_split->end(), inserter(m_hist_split, m_hist_split->begin()), DeepCopy::MapPointerValue<string, TH1D>() );

template <class Container>
  insert_iterator<Container> inserter(Container& x, typename Container::iterator i);