OGRFeature的DestroyFeature方法

Ogr的销毁DestroyFeature方法：

 void OGRFeature::DestroyFeature( OGRFeature *poFeature )
 {
     delete poFeature;
 }

析构函数中删除了几何对象和空间参考定义， ogrfeature.cpp文件中查看：

 OGRFeature::~OGRFeature()

 {
     if( poGeometry != NULL )
         delete poGeometry;

     for( int i = ; i < poDefn->GetFieldCount(); i++ )
     {
         OGRFieldDefn    *poFDefn = poDefn->GetFieldDefn(i);

         if( !IsFieldSet(i) )
             continue;

         switch( poFDefn->GetType() )
         {
           case OFTString:
             if( pauFields[i].String != NULL )
                 VSIFree( pauFields[i].String );
             break;

           case OFTBinary:
             if( pauFields[i].Binary.paData != NULL )
                 VSIFree( pauFields[i].Binary.paData );
             break;

           case OFTStringList:
             CSLDestroy( pauFields[i].StringList.paList );
             break;

           case OFTIntegerList:
           case OFTRealList:
             CPLFree( pauFields[i].IntegerList.paList );
             break;

           default:
             // should add support for wide strings.
             break;
         }
     }

     poDefn->Release();

     CPLFree( pauFields );
     CPLFree(m_pszStyleString);
     CPLFree(m_pszTmpFieldValue);
 }

~OGRFeature()