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 = 0; 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);
}