Oculus项目上的unique_ptr出错
Error with unique_ptr on Oculus project
我目前正在Ubuntu 14.04上进行Oculus Rift项目(DK1),并试图编译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电脑上运行了。
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
感谢
这里的问题在于这个消息:
输入.h:33:7:错误:使用已删除的函数'std::unique_ptr<_Tp,_Dp>::unique_ptr(const std::unique_pr<_Tp,_Dp>&)
显然,您正试图从另一个unique_ptr
构建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所在)。您只能移动unique_ptr
以转移所有权。
因此,您必须考虑到这些信息来修改代码。
注意:由于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"输入::输入(const输入&)"
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