cpp std::copy 编译期间出现问题：在“struct std::iterator_traits”中没有名为“value_type”的类型<unsigned_char>

Question

*** 解决了 ***

在实现复制构造函数时，我在编译我编写的类时遇到了问题。 该类将一个包含所有相关数据的结构作为字段保存，我将这些数据发送到一个名为 clone 的函数，该函数将结构的相关字段复制到新构造的类中。

struct tMicroControllerVersion
{
    unsigned char  PMC_Version [2]; // major,minor
    unsigned char  FPGA_Version [2];
    unsigned char  project_ID   [2];
    unsigned char  configuration_Type;
    unsigned char  PCB_Revision;
    unsigned char  Unit_Serial_No [6];
    unsigned char  Unit_Part_No [8];
    unsigned char  FPGA_device_ID;
    unsigned char  PMC_device_ID;
    unsigned char  Reserved [29];

    tMicroControllerVersion()
    {
      memset(this, 0, sizeof(tMicroControllerVersion));
    }
};

我的克隆方法如下所示：

    void CMicroControllerVersionMsg::clone(tMicroControllerVersion other)
    {
      std::copy(std::begin(other.PMC_Version),std::end(PMC_Version),this -> _data.body.PMC_Version);
      std::copy(std::begin(other.FPGA_Version),std::end(other.FPGA_Version),this -> _data.body. FPGA_Version);
      std::copy(std::begin(other.project_ID),std::end(other.project_ID),this -> _data.body. project_ID);
      this._data.body.configuration_type = other.configuration_type
      ...
    }

编辑：这就是班级的样子

#include <cstring>

#include "Tac4gInfras/Communication/SrcImp/BaseMessage.h"

#include "Tac4gPackages/FpgaTsComm/SrcImp/Messages/MCTsHeader.h"


#pragma pack(push, 1)
namespace FpgaTsCommNS
{

struct tMicroControllerVersion
{
    unsigned char  PMC_Version [2]; // major,minor
    unsigned char  FPGA_Version [2];
    unsigned char  project_ID   [2];
    unsigned char  configuration_Type;
    unsigned char  PCB_Revision;
    unsigned char  Unit_Serial_No [6];
    unsigned char  Unit_Part_No [8];
    unsigned char  FPGA_device_ID;
    unsigned char  PMC_device_ID;
    unsigned char  Reserved [29];

    tMicroControllerVersion()
    {
      memset(this, 0, sizeof(tMicroControllerVersion));
    }

};

struct tMicroControllerVersionResp
{
    /// Message data.
    tMicroControllerVersion body;
};

class CMicroControllerVersionMsg: public BaseMessage
{
public:

    //////////////////////////////////////////////////////////////
    ///  \brief  Constructor
    ///
    //////////////////////////////////////////////////////////////
    CMicroControllerVersionMsg();

    //////////////////////////////////////////////////////////////
    ///  \brief  Constructor
    ///
    //////////////////////////////////////////////////////////////
    CMicroControllerVersionMsg(CMicroControllerVersionMsg* pToCopy);

    //////////////////////////////////////////////////////////////
    ///  \brief Destructor.
    ///
    //////////////////////////////////////////////////////////////
    virtual ~CMicroControllerVersionMsg();

    //////////////////////////////////////////////////////////////
    ///  \brief  ToString for message
    ///
    ///  \param direction - direction for message
    ///  \return  message buffer in string format
    //////////////////////////////////////////////////////////////
    virtual string ToString();

    //////////////////////////////////////////////////////////////
    ///  \brief Validate message content.
    ///
    ///  \return True if message is valid, false otherwise.
    //////////////////////////////////////////////////////////////
    virtual bool Validate();

    //////////////////////////////////////////////////////////////
    ///  \brief  data clone
    ///
    //////////////////////////////////////////////////////////////
    void clone(tMicroControllerVersion other);

protected:

    //////////////////////////////////////////////////////////////
    ///  \brief Get class size.
    ///
    ///  \return Derived class size.
    //////////////////////////////////////////////////////////////
    virtual unsigned int GetClassSize();

public:
    /// data of the message
    tMicroControllerVersionResp _data;

};

}//namespace FpgaTsCommNS
#pragma pack(pop)

#endif  // _MICRO_CONTROLLER_VERSION_RESP_MSG_H

编译时出现错误

“在'struct std::iterator_traits<unsigned_char>'中没有​​名为'value_type'的类型”奇怪的是，在我的其他版本的代码中，这种对类似结构的副本的使用已经通过编译，所以我很茫然在这里做什么。 ofc 我可以手动插入 unsigned char 数组的每个值，但我正在寻找更优雅的解决方案。

注意：当我说某些东西通过编译时，我的意思是我使用 makefile 编译它，而不是一些 IDE 编译器。

编辑 2：解决了问题，使用 std::copy 应该是这样的：

std::copy(std::begin(other.FPGA_Version),std::end(other.FPGA_Version),std::begin(this -> _data.body.FPGA_Version));

Answer 1

经过一些重构后，它在http://cpp.sh/上编译得很好，除了以下行：

this._data.body.configuration_type = other.configuration_type

这是一个指针所以使用'->'

struct tMicroControllerVersion
{
    unsigned char  PMC_Version [2]; // major,minor
    unsigned char  FPGA_Version [2];
    unsigned char  project_ID   [2];
    unsigned char  configuration_Type;
    unsigned char  PCB_Revision;
    unsigned char  Unit_Serial_No [6];
    unsigned char  Unit_Part_No [8];
    unsigned char  FPGA_device_ID;
    unsigned char  PMC_device_ID;
    unsigned char  Reserved [29];

    tMicroControllerVersion()
    {
      memset(this, 0, sizeof(tMicroControllerVersion));
    }
    
    void clone(tMicroControllerVersion other);
};

void tMicroControllerVersion::clone(tMicroControllerVersion other)
    {
      std::copy(std::begin(other.PMC_Version),std::end(PMC_Version),this->PMC_Version);
      std::copy(std::begin(other.FPGA_Version),std::end(other.FPGA_Version),this->FPGA_Version);
      std::copy(std::begin(other.project_ID),std::end(other.project_ID),this->project_ID);
      this->configuration_Type = other.configuration_Type;
    }