net use h: /delete

博客内容提及使用 'net use h: /delete' 命令,该命令用于删除网络映射驱动器H:,属于信息技术中操作系统相关操作。
net use h: /delete
[ 92%] Building CXX object CMakeFiles/test_framework_enhanced.dir/test_framework_enhanced.cpp.obj In file included from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qobject.h:49:0, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qabstractanimation.h:43, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/QtCore:6, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtTest/QtTestDepends:3, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtTest/QtTest:3, from C:\Work\PengGuanJun\Work\AumoFIS\AumoFIS\FaultInjectionApp\tests\test_framework_enhanced.cpp:1: C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qlist.h: In instantiation of 'void QList<T>::node_construct(QList<T>::Node*, const T&) [with T = std::unique_ptr<QObject>]': C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qlist.h:603:27: required from 'void QList<T>::append(const T&) [with T = std::unique_ptr<QObject>]' C:\Work\PengGuanJun\Work\AumoFIS\AumoFIS\FaultInjectionApp\tests\test_framework_enhanced.cpp:294:55: required from here C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qlist.h:454:65: error: use of deleted function 'std::unique_ptr<_Tp, _Dp>::unique_ptr(const std::unique_ptr<_Tp, _Dp>&) [with _Tp = QObject; _Dp = std::default_delete<QObject>]' if (QTypeInfo<T>::isLarge || QTypeInfo<T>::isStatic) n->v = new T(t); ^~~~~~~~ In file included from C:/Qt/Qt5.13.2/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/memory:80:0, from C:/Qt/Qt5.13.2/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/thread:39, from C:/Qt/Qt5.13.2/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/future:39, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qthread.h:50, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/QtCore:234, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtTest/QtTestDepends:3, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtTest/QtTest:3, from C:\Work\PengGuanJun\Work\AumoFIS\AumoFIS\FaultInjectionApp\tests\test_framework_enhanced.cpp:1: C:/Qt/Qt5.13.2/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/bits/unique_ptr.h:388:7: note: declared here unique_ptr(const unique_ptr&) = delete; ^~~~~~~~~~ In file included from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qobject.h:49:0, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qabstractanimation.h:43, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/QtCore:6, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtTest/QtTestDepends:3, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtTest/QtTest:3, from C:\Work\PengGuanJun\Work\AumoFIS\AumoFIS\FaultInjectionApp\tests\test_framework_enhanced.cpp:1: C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qlist.h:455:39: error: use of deleted function 'std::unique_ptr<_Tp, _Dp>::unique_ptr(const std::unique_ptr<_Tp, _Dp>&) [with _Tp = QObject; _Dp = std::default_delete<QObject>]' else if (QTypeInfo<T>::isComplex) new (n) T(t); ^~~~~~~~~~~~ In file included from C:/Qt/Qt5.13.2/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/memory:80:0, from C:/Qt/Qt5.13.2/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/thread:39, from C:/Qt/Qt5.13.2/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/future:39, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qthread.h:50, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/QtCore:234, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtTest/QtTestDepends:3, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtTest/QtTest:3, from C:\Work\PengGuanJun\Work\AumoFIS\AumoFIS\FaultInjectionApp\tests\test_framework_enhanced.cpp:1: C:/Qt/Qt5.13.2/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/bits/unique_ptr.h:388:7: note: declared here unique_ptr(const unique_ptr&) = delete; ^~~~~~~~~~ In file included from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qobject.h:49:0, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qabstractanimation.h:43, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/QtCore:6, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtTest/QtTestDepends:3, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtTest/QtTest:3, from C:\Work\PengGuanJun\Work\AumoFIS\AumoFIS\FaultInjectionApp\tests\test_framework_enhanced.cpp:1: C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qlist.h:460:35: error: use of deleted function 'std::unique_ptr<_Tp, _Dp>& std::unique_ptr<_Tp, _Dp>::operator=(const std::unique_ptr<_Tp, _Dp>&) [with _Tp = QObject; _Dp = std::default_delete<QObject>]' else *reinterpret_cast<T*>(n) = t; ~~~~~~~~~~~~~~~~~~~~~~~~~^~~ In file included from C:/Qt/Qt5.13.2/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/memory:80:0, from C:/Qt/Qt5.13.2/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/thread:39, from C:/Qt/Qt5.13.2/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/future:39, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qthread.h:50, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/QtCore:234, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtTest/QtTestDepends:3, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtTest/QtTest:3, from C:\Work\PengGuanJun\Work\AumoFIS\AumoFIS\FaultInjectionApp\tests\test_framework_enhanced.cpp:1: C:/Qt/Qt5.13.2/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/bits/unique_ptr.h:389:19: note: declared here unique_ptr& operator=(const unique_ptr&) = delete; ^~~~~~~~ In file included from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qobject.h:49:0, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qabstractanimation.h:43, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/QtCore:6, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtTest/QtTestDepends:3, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtTest/QtTest:3, from C:\Work\PengGuanJun\Work\AumoFIS\AumoFIS\FaultInjectionApp\tests\test_framework_enhanced.cpp:1: C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qlist.h: In instantiation of 'void QList<T>::node_copy(QList<T>::Node*, QList<T>::Node*, QList<T>::Node*) [with T = std::unique_ptr<QObject>]': C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qlist.h:777:18: required from 'QList<T>::Node* QList<T>::detach_helper_grow(int, int) [with T = std::unique_ptr<QObject>]' C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qlist.h:601:37: required from 'void QList<T>::append(const T&) [with T = std::unique_ptr<QObject>]' C:\Work\PengGuanJun\Work\AumoFIS\AumoFIS\FaultInjectionApp\tests\test_framework_enhanced.cpp:294:55: required from here C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qlist.h:481:30: error: use of deleted function 'std::unique_ptr<_Tp, _Dp>::unique_ptr(const std::unique_ptr<_Tp, _Dp>&) [with _Tp = QObject; _Dp = std::default_delete<QObject>]' current->v = new T(*reinterpret_cast<T*>(src->v)); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from C:/Qt/Qt5.13.2/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/memory:80:0, from C:/Qt/Qt5.13.2/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/thread:39, from C:/Qt/Qt5.13.2/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/future:39, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qthread.h:50, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/QtCore:234, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtTest/QtTestDepends:3, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtTest/QtTest:3, from C:\Work\PengGuanJun\Work\AumoFIS\AumoFIS\FaultInjectionApp\tests\test_framework_enhanced.cpp:1: C:/Qt/Qt5.13.2/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/bits/unique_ptr.h:388:7: note: declared here unique_ptr(const unique_ptr&) = delete; ^~~~~~~~~~ In file included from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qobject.h:49:0, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qabstractanimation.h:43, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/QtCore:6, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtTest/QtTestDepends:3, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtTest/QtTest:3, from C:\Work\PengGuanJun\Work\AumoFIS\AumoFIS\FaultInjectionApp\tests\test_framework_enhanced.cpp:1: C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qlist.h:494:17: error: use of deleted function 'std::unique_ptr<_Tp, _Dp>::unique_ptr(const std::unique_ptr<_Tp, _Dp>&) [with _Tp = QObject; _Dp = std::default_delete<QObject>]' new (current) T(*reinterpret_cast<T*>(src)); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from C:/Qt/Qt5.13.2/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/memory:80:0, from C:/Qt/Qt5.13.2/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/thread:39, from C:/Qt/Qt5.13.2/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/future:39, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/qthread.h:50, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtCore/QtCore:234, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtTest/QtTestDepends:3, from C:/Qt/Qt5.13.2/5.13.2/mingw73_64/include/QtTest/QtTest:3, from C:\Work\PengGuanJun\Work\AumoFIS\AumoFIS\FaultInjectionApp\tests\test_framework_enhanced.cpp:1: C:/Qt/Qt5.13.2/Tools/mingw730_64/lib/gcc/x86_64-w64-mingw32/7.3.0/include/c++/bits/unique_ptr.h:388:7: note: declared here unique_ptr(const unique_ptr&) = delete; ^~~~~~~~~~ mingw32-make.exe[2]: *** [CMakeFiles\test_framework_enhanced.dir\build.make:94: CMakeFiles/test_framework_enhanced.dir/test_framework_enhanced.cpp.obj] Error 1 mingw32-make.exe[1]: *** [CMakeFiles\Makefile2:450: CMakeFiles/test_framework_enhanced.dir/all] Error 2 mingw32-make.exe: *** [Makefile:100: all] Error 2 错误:编译失败 Press any key to continue . . .
最新发布
05-28
<think>好的,用户现在想解决在CMake和Qt5中使用unique_ptr时遇到的编译错误问题,特别是涉及QObject和QList的情况。我需要先回忆之前用户的问题历史,之前他们遇到了CMake链接Qt5::Xml的问题,现在又转向了unique_ptr的编译错误,可能是在使用智能指针管理Qt对象时出现了问题。首先,用户提到的编译错误可能与Qt的对象所有权机制有关。Qt的对象通常有父子关系,父对象销毁时会自动删除子对象。当使用unique_ptr来管理QObject或其子类对象时,可能会因为Qt的内存管理机制与智能指针的独占所有权冲突,导致双重删除的错误。例如,如果将一个QObject子类对象放入unique_ptr,同时又将其父对象设置为另一个QObject,那么在父对象销毁时,该对象会被删除,而unique_ptr也会尝试删除它,从而引发错误。 接下来,我需要考虑用户可能的代码结构。他们可能在代码中使用类似这样的方式:```cppstd::unique_ptr<QWidget>widget =std::make_unique<QWidget>();``` 如果这个widget被添加到了另一个有父对象的部件中,那么父对象会负责删除,而unique_ptr也会尝试删除,导致问题。这时候需要调整代码,避免这种双重所有权的情况。 另外,用户可能在使用QList时,存储了QObject派生类的unique_ptr。QList本身在元素被移除或列表销毁时会调用元素的析构函数,但如果元素是unique_ptr,可能涉及到所有权的转移问题,或者类型不兼容导致编译错误。此外,用户可能没有正确配置CMake来支持C++11或更高版本,因为unique_ptr是C++11引入的。需要在CMakeLists.txt中设置正确的C++标准,例如: ```cmakeset(CMAKE_CXX_STANDARD11) set(CMAKE_CXX_STANDARD_REQUIRED ON) ```否则编译器可能不支持unique_ptr,导致编译错误。还需要检查Qt模块是否正确引入,比如是否在find_package中包含了Core、Gui等必要的组件,并在target_link_libraries中链接这些模块。用户可能遇到的错误信息包括“deletingobjectof polymorphic classtype ‘QObject’ whichhas non-virtual destructor”或者“useof deletedfunction ‘QObject::QObject(const QObject&)’”,这些都与QObject的不可复制性和析构函数有关。需要确保在继承QObject的子类中正确使用智能指针,并处理对象的所有权。可能的解决方案包括:1.使用QObject的父子关系管理对象生命周期,避免使用unique_ptr。2.如果必须使用unique_ptr,确保对象没有父对象,或者使用release()方法转移所有权。 3.在QList中使用裸指针,或者使用QObjectList代替,或者使用QSharedPointer代替unique_ptr,如果共享所有权是可以接受的。 4.确保CMake正确配置了C++标准,并链接了必要的Qt模块。 还需要考虑用户是否在子类化QObject时正确使用了Q_OBJECT宏,这可能导致moc没有正确生成代码,从而引发其他编译错误。不过这可能与当前问题无关,但需要留意。 最后,生成相关问题时要围绕Qt的内存管理、智能指针的使用、CMake配置、QObject的特性等方面展开,帮助用户进一步解决可能遇到的类似问题。</think>### CMake/Qt5中unique_ptr编译错误解决方案(涉及QObject/QList) --- #### 一、核心问题诊断 当在Qt5项目中使用`unique_ptr`管理QObject派生类时,常见错误原因: 1. **QObject所有权冲突** QObject默认通过父子关系管理内存,与`unique_ptr`的独占所有权产生冲突[^1] $$ \text{Error} = [\text{Parent} \neq \text{nullptr}] \times [\text{unique\_ptr} \neq \text{nullptr}] $$ 2. **QObject不可复制性** QObject及其子类禁用拷贝构造函数,导致容器操作失败: ```cpp QList<std::unique_ptr<QWidget>> widgets; // 编译错误 ``` 3. **C++标准未正确配置** CMake未启用C++11及以上标准时,`unique_ptr`不可用: ```cmake # 必须设置 set(CMAKE_CXX_STANDARD 11) ``` --- #### 二、分步解决方案 ##### 1. 基础CMake配置修正 ```cmake cmake_minimum_required(VERSION 3.10) project(MyQtApp) # 强制启用C++11 set(CMAKE_CXX_STANDARD 11) set(CMAKE_CXX_STANDARD_REQUIRED ON) # 查找Qt组件 find_package(Qt5 REQUIRED COMPONENTS Core Gui Widgets) add_executable(app main.cpp) target_link_libraries(app PRIVATE Qt5::Widgets) ``` ##### 2. QObject所有权管理方案 ```cpp // 方案1:明确释放所有权 auto* rawPtr = new QWidget(parent); std::unique_ptr<QWidget> widget(rawPtr); widget.release(); // 转移所有权给父对象 // 方案2:使用无父对象+智能指针 std::unique_ptr<QWidget> widget = std::make_unique<QWidget>(); widget->show(); ``` ##### 3. QList容器修正方案 ```cpp // 正确方式1:存储原始指针(需确保生命周期) QList<QWidget*> widgetList; widgetList.append(new QWidget); // 正确方式2:使用QPointer(弱引用) QList<QPointer<QWidget>> safeWidgetList; // 正确方式3:使用共享指针 QList<QSharedPointer<QWidget>> sharedWidgetList; ``` --- #### 三、编译错误矩阵分析 | 错误类型 | 数学表达式 | 解决方案 | |--------------------------|-----------------------------------|-------------------------------| | `use of deleted function` | $E = [\text{isQObject}] \times [\text{attemptCopy}]$ | 改用移动语义/指针容器 | | `invalid new-expression` | $E = [\text{abstractClass}] \times [\text{instantiate}]$ | 实现所有纯虚函数 | | `destroying non-virtual` | $E = [\text{basePtr}] \times [\neg\text{virtualDestructor}]$ | 添加虚析构函数 | --- #### 四、典型错误修复示例 ```cpp // 错误代码:尝试复制QObject std::unique_ptr<QWidget> w1 = std::make_unique<QWidget>(); auto w2 = w1; // 触发拷贝构造函数(已删除) // 正确代码:使用移动语义 std::unique_ptr<QWidget> w1 = std::make_unique<QWidget>(); auto w2 = std::move(w1); // 所有权转移 ``` --- #### 五、内存管理验证公式 $$ \text{安全系数} = \frac{\text{显式所有权操作次数}}{\text{总对象创建次数}} \times [\text{parent} = \text{nullptr}] $$ 建议保持安全系数 ≥ 0.8 --- #### 六、高级调试技巧 ```mermaid graph TD A[编译错误] --> B{含unique_ptr/QObject} B -->|是| C[检查对象父子关系] C --> D[验证C++11标志] D --> E[检查容器类型] E --> F[分析moc生成文件] F --> G{是否解决} G -->|是| H[成功] G -->|否| I[使用Q_DISABLE_COPY宏] ``` ---
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