使用unique_ptr <>實現移動構造函數和賦值

Question

我的Device.cpp文件中有當前構造函數

Device::Device(const char *devName)
{
    device = devName;
    bt.reset(BTSerialPortBinding::Create(devName, 1));
}

我的Device.h包含一個具有以下內容的設備類：

Device(const char *devName="");
~Device();
const char *device;
std::unique_ptr<BTSerialPortBinding> bt;

我試圖糾正移動構造函數並移動賦值，因為unique_ptr無法復制，因此我的類變為不可復制，並且〜Device（）最終將其刪除。

因此，當我嘗試使用時：

Device dev; // declared in Process.h

dev = Device("93:11:22"); // initialised in Process.cpp

我收到以下錯誤：

Device &Device::operator =(const Device &)': attempting to reference a deleted function

我在Device.h中嘗試了以下方法，但沒有運氣：

//move assignment operator
Device &operator=(Device &&o)
{
    if (this != &o)
    {
        bt = std::move(o.bt);
    }
    return *this;
}
Device(Device &&o) : bt(std::move(o.bt)) {};

嘗試以下操作時出現以下錯誤：

1>bluetoothserialport.lib(BTSerialPortBinding.obj) : error LNK2038: mismatch detected for 'RuntimeLibrary': value 'MDd_DynamicDebug' doesn't match value 'MTd_StaticDebug' in ArduinoDevice.obj
1>bluetoothserialport.lib(BluetoothHelpers.obj) : error LNK2038: mismatch detected for 'RuntimeLibrary': value 'MDd_DynamicDebug' doesn't match value 'MTd_StaticDebug' in ArduinoDevice.obj
1>msvcprtd.lib(MSVCP140D.dll) : error LNK2005: "public: __thiscall std::_Lockit::_Lockit(int)" (??0_Lockit@std@@QAE@H@Z) already defined in libcpmtd.lib(xlock.obj)
1>msvcprtd.lib(MSVCP140D.dll) : error LNK2005: "public: __thiscall std::_Lockit::~_Lockit(void)" (??1_Lockit@std@@QAE@XZ) already defined in libcpmtd.lib(xlock.obj)
1>msvcprtd.lib(MSVCP140D.dll) : error LNK2005: "void __cdecl std::_Debug_message(wchar_t const *,wchar_t const *,unsigned int)" (?_Debug_message@std@@YAXPB_W0I@Z) already defined in libcpmtd.lib(stdthrow.obj)
1>msvcprtd.lib(MSVCP140D.dll) : error LNK2005: "void __cdecl std::_Xbad_alloc(void)" (?_Xbad_alloc@std@@YAXXZ) already defined in libcpmtd.lib(xthrow.obj)
1>msvcprtd.lib(MSVCP140D.dll) : error LNK2005: "void __cdecl std::_Xlength_error(char const *)" (?_Xlength_error@std@@YAXPBD@Z) already defined in libcpmtd.lib(xthrow.obj)
1>msvcprtd.lib(MSVCP140D.dll) : error LNK2005: "void __cdecl std::_Xout_of_range(char const *)" (?_Xout_of_range@std@@YAXPBD@Z) already defined in libcpmtd.lib(xthrow.obj)

使用此庫用於BTSerialPortBinding在Visual Studio 2015上的Windows 10中運行： https : //github.com/Agamnentzar/bluetooth-serial-port

Answer 1

unique_ptr不能被復制，包含它的任何類都不能被復制構造或復制分配。 您將需要至少為類定義move構造函數和move賦值運算符。