Ogre如何在没有C4251警告的导出类中使用STL容器？

Question

OgrePrerequisites.h

int getMostOccuring(int array[], int length)
{
   int current_number;
   int current_count = 0;
   int most_occuring_number;
   int most_occuring_count = 0;

   for (int i = 0; i < length; i++)
   {
      current_number = array[i];
      current_count = 0;

      for (int j = i; j < length; j++)
      {
          int test_number = array[j];

          if (test_number == current_number)
          {
             current_count ++;

             if (current_count > most_occuring_count)
             {
                most_occuring_number = current_number;
                most_occuring_count = current_count;
             }
          }
      }
   }

   return most_occuring_number;
}

OgreLogManager.h

#define _OgreExport __declspec( dllexport )

template <typename K, typename V, typename P = std::less<K>, typename A = STLAllocator<std::pair<const K, V>, GeneralAllocPolicy> > 
struct map 
{ 
   typedef typename std::map<K, V, P, A> type;
   typedef typename std::map<K, V, P, A>::iterator iterator;
   typedef typename std::map<K, V, P, A>::const_iterator const_iterator;
}

class _OgreExport LogManager { protected: typedef map<String, Log*>::type LogList; /// A list of all the logs the manager can access LogList mLogs; }; 使用LogManager，但是当我构建项目时，我没有收到任何C4251警告：

std::map

我想知道Ogre如何消除**class 'std::map<_Kty,_Ty>' needs to have dll-interface to be used by clients of class** 警告？

Answer 1

他们disable明确警告#pragma warning某些警告。正如在MSDN上提到的，通常的方法是使用

的组合在本地禁用警告

#pragma warning( push )
#pragma warning( disable : 4705 )
// Some code
#pragma warning( pop )

恢复原始警告设置。它们会在OgreHeaderSuffix.h中恢复警告设置，因此仅对库代码禁用这些警告。