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我目前正在 Ubuntu 14.04 上开发 Oculus Rift 项目 (DK1)，并尝试编译 github 项目。这是一个用 C++ 编写的 Qt 项目。我有以下关于“unique_ptr”的错误。我认为已经安装了正确的库。我知道这段代码已经在 Ubuntu 计算机上运行。

    g++ -c -m64 -pipe -Ofast -Wno-deprecated -O2 -std=c++0x -Wall -W -fPIE  -I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++-64 -I. -o Camera.o Camera.cpp
    In file included from Include/OVR/LibOVR/Include/../Src/OVR_Device.h:33:0,
                 from Include/OVR/LibOVR/Include/OVR.h:35,
                 from Oculus.h:13,
                 from Input.h:13,
                 from Camera.h:12,
                 from Camera.cpp:1:
    Include/OVR/LibOVR/Include/../Src/OVR_DeviceMessages.h: In constructor ‘OVR::MessageCameraFrame::MessageCameraFrame(OVR::DeviceBase*)’:
    Include/OVR/LibOVR/Include/../Src/OVR_DeviceMessages.h:255:13: warning: ‘OVR::MessageCameraFrame::CameraHandle’ will be initialized after [-Wreorder]
     UInt32* CameraHandle;   // Identifies the camera object associated with this frame
             ^
    Include/OVR/LibOVR/Include/../Src/OVR_DeviceMessages.h:249:18: warning:   ‘const UByte* OVR::MessageCameraFrame::pFrameData’ [-Wreorder]
     const UByte* pFrameData;  // a ptr to frame data. 
                  ^
    Include/OVR/LibOVR/Include/../Src/OVR_DeviceMessages.h:226:5: warning:   when initialized here [-Wreorder]
     MessageCameraFrame(DeviceBase* dev)
     ^
Camera.cpp: In constructor ‘Camera::Camera(const vec3&, const vec3&, const vec3&, float, float, const Input&)’:
Camera.cpp:20:18: error: use of deleted function ‘Input::Input(const Input&)’
     speed_ {speed}
                  ^
    In file included from Camera.h:12:0,
                 from Camera.cpp:1:
Input.h:33:7: note: ‘Input::Input(const Input&)’ is implicitly deleted because the default definition would be ill-formed:
 class Input
       ^
    Input.h:33:7: error: use of deleted function ‘std::unique_ptr<_Tp, _Dp>::unique_ptr(const std::unique_ptr<_Tp, _Dp>&) [with _Tp = GenericOculus; _Dp = std::default_delete<GenericOculus>]’
In file included from /usr/include/c++/4.8/memory:81:0,
                 from LogCpp/Log.h:8,
                 from Oculus.h:23,
                 from Input.h:13,
                 from Camera.h:12,
                 from Camera.cpp:1:
/usr/include/c++/4.8/bits/unique_ptr.h:273:7: error: declared here
       unique_ptr(const unique_ptr&) = delete;
       ^
    Camera.cpp:20:18: warning: a temporary bound to ‘Camera::input_’ only persists until the constructor exits [-Wextra]
     speed_ {speed}
                  ^
    make: *** [Camera.o] Erreur 1

谢谢

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1 回答 1

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这里的问题在于这条消息：

Input.h:33:7：错误：使用已删除的函数 'std::unique_ptr<_Tp, _Dp>::unique_ptr(const std::unique_ptr<_Tp, _Dp>&)

您显然是在尝试unique_ptr从 another构建 a unique_ptr。这是禁止的，因为unique_ptr无法复制（这就是拥有唯一指针的意义）。您只能移动aunique_ptr以转移所有权。

因此，您必须考虑到这些信息来修改该代码。

注意：由于您的类中显然有一个成员unique_ptr，并且它的复制构造函数被删除（即明确禁止），因此您的类的默认复制构造函数本身也被删除，这解释了堆栈中的以下错误消息：

Camera.cpp:20:18：错误：使用已删除的函数'Input::Input(const Input&)

于 2014-10-24T08:17:47.577 回答