Question

我目前正在Ubuntu 14.04上开发Oculus Rift项目（DK1），我尝试编译一个github项目。这是一个用C ++编写的Qt项目。我有关于“unique_ptr”的以下错误。我认为已经安装了正确的库。我知道这段代码已经在Ubuntu计算机上运行了。

    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

Answer 1

这里的问题在于以下信息：

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

您显然正在尝试从另一个unique_ptr构建unique_ptr。那是被禁止的，因为unique_ptr无法复制（这就是拥有唯一指针的意义）。您只能move unique_ptr转让所有权。

因此，您必须记住这些信息来修改该代码。

注意：由于您的类中显然有成员unique_ptr，并且其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已被删除，这解释了以下错误堆栈中的消息：

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

Oculus项目中unique_ptr出错

1 个答案: