cannot declare field ‘__gnu_cxx::__aligned_membuf<senseauto_memory::IMessageBase...
🚨 错误信息
[ 16%] Building CXX object CMakeFiles/ic_nm_dataprovider_unittest.dir/src/data_provider/test_DataProvider.cpp.o
[ 16%] Built target SQLiteCpp_cpplint
In file included from /usr/include/c++/11/bits/shared_ptr_base.h:60,
from /usr/include/c++/11/bits/shared_ptr.h:53,
from /usr/include/c++/11/memory:77,
from /usr/include/gtest/gtest.h:57,
from /data/gerrit/workspace_GWM_repo/Platform/IC_NM_DataProvider/test/unittest/src/data_provider/test_DataProvider.cpp:5:
/usr/include/c++/11/ext/aligned_buffer.h: In instantiation of ‘struct __gnu_cxx::__aligned_membuf<senseauto_memory::IMessageBase>::_Tp2’:
/usr/include/c++/11/ext/aligned_buffer.h:56:33: required from ‘struct __gnu_cxx::__aligned_membuf<senseauto_memory::IMessageBase>’
/usr/include/c++/11/bits/stl_list.h:170:40: required from ‘struct std::_List_node<senseauto_memory::IMessageBase>’
/usr/include/c++/11/bits/list.tcc:73:19: required from ‘void std::__cxx11::_List_base<_Tp, _Alloc>::_M_clear() [with _Tp = senseauto_memory::IMessageBase; _Alloc = std::allocator<senseauto_memory::IMessageBase>]’
/usr/include/c++/11/bits/stl_list.h:500:9: required from ‘std::__cxx11::_List_base<_Tp, _Alloc>::~_List_base() [with _Tp = senseauto_memory::IMessageBase; _Alloc = std::allocator<senseauto_memory::IMessageBase>]’
/usr/include/c++/11/bits/stl_list.h:674:7: required from here
/usr/include/c++/11/ext/aligned_buffer.h:54:25: error: cannot declare field ‘__gnu_cxx::__aligned_membuf<senseauto_memory::IMessageBase>::_Tp2::_M_t’ to be of abstract type ‘senseauto_memory::IMessageBase’
54 | struct _Tp2 { _Tp _M_t; };
| ^~~~
In file included from /data/gerrit/workspace_GWM_repo/Platform/IC_NM_DataProvider/test/unittest/../../data_provider/include/public/DataProvider.h:13,
from /data/gerrit/workspace_GWM_repo/Platform/IC_NM_DataProvider/test/unittest/src/data_provider/test_DataProvider.cpp:10:
/data/gerrit/workspace_GWM_repo/Platform/IC_NM_DataProvider/test/unittest/../../memory_messages/include/public/message_base.h:14:7: note: because the following virtual functions are pure within ‘senseauto_memory::IMessageBase’:
14 | class IMessageBase
| ^~~~~~~~~~~~
/data/gerrit/workspace_GWM_repo/Platform/IC_NM_DataProvider/test/unittest/../../memory_messages/include/public/message_base.h:19:25: note: ‘virtual senseauto_memory::MessageType senseauto_memory::IMessageBase::type()’
19 | virtual MessageType type() = 0;
| ^~~~
make[2]: *** [CMakeFiles/ic_nm_dataprovider_unittest.dir/build.make:261: CMakeFiles/ic_nm_dataprovider_unittest.dir/src/data_provider/test_DataProvider.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:159: CMakeFiles/ic_nm_dataprovider_unittest.dir/all] Error 2
make: *** [Makefile:146: all] Error 2
🤖 AI解决方案
/usr/include/c++/11/ext/aligned_buffer.h:54:25: error: cannot declare field ‘__gnu_cxx::__aligned_membuf<senseauto_memory::IMessageBase>::_Tp2::_M_t’ to be of abstract type ‘senseauto_memory::IMessageBase’
54 | struct _Tp2 { _Tp _M_t; };
| ^~~~
In file included from /data/gerrit/workspace_GWM_repo/Platform/IC_NM_DataProvider/test/unittest/../../memory_messages/include/public/message_base.h:14:
/data/gerrit/workspace_GWM_repo/Platform/IC_NM_DataProvider/test/unittest/../../memory_messages/include/public/message_base.h:19:25: note: because the following virtual functions are pure within ‘senseauto_memory::IMessageBase’:
19 | virtual MessageType type() = 0;
| ^~~~错误翻译：
在 /usr/include/c++/11/ext/aligned_buffer.h 的 54 行，无法将成员变量 '_M_t' 声明为抽象类型 'senseauto_memory::IMessageBase' 的实例。
原因：'senseauto_memory::IMessageBase' 是一个抽象类（因为它包含纯虚函数 'virtual MessageType type() = 0;'），不能直接实例化。根本原因：std::list（在内部使用了 __gnu_cxx::__aligned_membuf）尝试在内部创建一个 senseauto_memory::IMessageBase 类型的对象，但 IMessageBase 是一个抽象基类，不能被直接实例化。
解决方案：
确保 senseauto_memory::IMessageBase 不是抽象类，或者提供一个具体的派生类来实例化。
如果 IMessageBase 不应该是抽象类，请移除 virtual MessageType type() = 0; 的 = 0。
如果 IMessageBase 应该是抽象类，那么不能将其直接存储在 std::list 中。应该存储指向其派生类对象的指针（例如 std::list 或 std::list)。
例如，使用智能指针来存储派生类对象：
修改 test_DataProvider.cpp 中使用 std::list 的地方，改为：
++
#include <memory> // 包含 <memory> 头文件
// ...
// 原来的可能是：
// std::list<senseauto_memory::IMessageBase> messageList;
// 修改为：
std::list<std::unique_ptr<senseauto_memory::IMessageBase>> messageList;预防措施：
- 在定义接口类（包含纯虚函数）时，明确其作为抽象基类的意图，并注意不要在容器中直接存储该接口类的对象实例。
- 使用智能指针（如
std::unique_ptr或std::shared_ptr）来管理多态对象的生命周期，尤其是在容器中存储指向基类指针的场景。