Re: [Boost-bugs] [Boost C++ Libraries] #730: The ptr_map iterator cannot be dereference to value type

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #730: The ptr_map iterator cannot be dereference to value type
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2007-08-21 21:08:55

#730: The ptr_map iterator cannot be dereference to value type
-----------------------+----------------------------------------------------
  Reporter:  zxing     |       Owner:  nesotto      
      Type:  Bugs      |      Status:  new          
 Milestone:            |   Component:  ptr_container
   Version:  None      |    Severity:  Problem      
Resolution:  Rejected  |    Keywords:               
-----------------------+----------------------------------------------------
Changes (by marshall):

  * status:  assigned => new
  * component:  None => ptr_container
  * severity:  => Problem

Old description:

> {{{
> The following code was built and worded well under
> VS.NET 2003 and boost v1.33. But under boost v1.34, it
> cannot built
>
> // testshareptr.cpp : Defines the entry point for the
> console application.
> //
>
> #include "stdafx.h"
> #include "C:\Dev\Head\Third Party Libraries\Public
> Headers\boost\ptr_container\ptr_map.hpp"
> #include "C:\Dev\Head\Third Party Libraries\Public
> Headers\boost\ptr_container\ptr_vector.hpp"
> #include "C:\Dev\Head\Third Party Libraries\Public
> Headers\boost\signal.hpp"
> #include "C:\Dev\Head\Third Party Libraries\Public
> Headers\boost\signals\slot.hpp"
> #include "C:\Dev\Head\Third Party Libraries\Public
> Headers\boost\signals\trackable.hpp"
> #include "C:\Dev\Head\Third Party Libraries\Public
> Headers\boost\signals\connection.hpp"
> #include "C:\Dev\Head\Third Party Libraries\Public
> Headers\boost\visit_each.hpp"
> #include "C:\Dev\Head\Third Party Libraries\Public
> Headers\boost\last_value.hpp"
> #include "C:\Dev\Head\Third Party Libraries\Public
> Headers\boost\lambda\algorithm.hpp"
> #include <algorithm>
> #include <functional>
>

> class TValue
> {
> private:
>         int m_n;
>
> public:
>
>         TValue(int n = 0)
>         {
>                 m_n = n;
>                 printf("I am brith at %i\n", m_n);
>         }
>
>         ~TValue()
>         {
>                 printf("I am %i and dying\n", m_n);
>         }
>
>         void WhoIs()
>         {
>                 printf("I am %i\n", m_n);
>         }
>
>         int Get(void) const {return m_n;}
>         int Get2(void) {return m_n;}
> };
>
> typedef boost::ptr_map<int, TValue>CMyMap;
>
> bool Larger(const TValue& p1, const TValue& p2)
> {
>         bool bRet = false;
>
>         bRet = (p2.Get() <= p1.Get() && (p2.Get()%2==0));
>
>         return bRet;
> }
>

> void TestCase1()
> {
>         printf("\n\n======================TestCase
> 1:======================\n");
>         CMyMap mymap;
>         for(int i = 0; i < 10; ++i)
>         {
>                 mymap.insert(i, new TValue(i));
>         }
>
>         std::stable_sort(mymap.begin(), mymap.end(), Larger);
> }
>

>
> int _tmain(int argc, _TCHAR* argv[])
> {
>         TestCase1();
>         return 0;
> }
> }}}

New description:

 {{{
 The following code was built and worded well under
 VS.NET 2003 and boost v1.33. But under boost v1.34, it
 cannot built

 // testshareptr.cpp : Defines the entry point for the
 console application.
 //

 #include "stdafx.h"
 #include "C:\Dev\Head\Third Party Libraries\Public
 Headers\boost\ptr_container\ptr_map.hpp"
 #include "C:\Dev\Head\Third Party Libraries\Public
 Headers\boost\ptr_container\ptr_vector.hpp"
 #include "C:\Dev\Head\Third Party Libraries\Public
 Headers\boost\signal.hpp"
 #include "C:\Dev\Head\Third Party Libraries\Public
 Headers\boost\signals\slot.hpp"
 #include "C:\Dev\Head\Third Party Libraries\Public
 Headers\boost\signals\trackable.hpp"
 #include "C:\Dev\Head\Third Party Libraries\Public
 Headers\boost\signals\connection.hpp"
 #include "C:\Dev\Head\Third Party Libraries\Public
 Headers\boost\visit_each.hpp"
 #include "C:\Dev\Head\Third Party Libraries\Public
 Headers\boost\last_value.hpp"
 #include "C:\Dev\Head\Third Party Libraries\Public
 Headers\boost\lambda\algorithm.hpp"
 #include <algorithm>
 #include <functional>


 class TValue
 {
 private:
         int m_n;

 public:

         TValue(int n = 0)
         {
                 m_n = n;
                 printf("I am brith at %i\n", m_n);
         }

         ~TValue()
         {
                 printf("I am %i and dying\n", m_n);
         }

         void WhoIs()
         {
                 printf("I am %i\n", m_n);
         }

         int Get(void) const {return m_n;}
         int Get2(void) {return m_n;}
 };

 typedef boost::ptr_map<int, TValue>CMyMap;

 bool Larger(const TValue& p1, const TValue& p2)
 {
         bool bRet = false;

         bRet = (p2.Get() <= p1.Get() && (p2.Get()%2==0));

         return bRet;
 }


 void TestCase1()
 {
         printf("\n\n======================TestCase
 1:======================\n");
         CMyMap mymap;
         for(int i = 0; i < 10; ++i)
         {
                 mymap.insert(i, new TValue(i));
         }

         std::stable_sort(mymap.begin(), mymap.end(), Larger);
 }



 int _tmain(int argc, _TCHAR* argv[])
 {
         TestCase1();
         return 0;
 }
 }}}

-- 
Ticket URL: <http://svn.boost.org/trac/boost/ticket/730#comment:2>
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