C++ and Windows are fighting with each other, and I need to get them to stop.
I have a Visual Studio 2022 generated class that implements CDialogEx
, and I need to add this to an array capable of insert. This is hard.
The class that Visual Studio 2022 generated for the dialog looks like this:
class SignPage : public CDialogEx{ DECLARE_DYNAMIC(SignPage)public: SignPage(CWnd* pParent = nullptr); // standard constructor virtual ~SignPage();// Dialog Data#ifdef AFX_DESIGN_TIME enum { IDD = IDD_SIGN_PAGE };#endifprotected: virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support DECLARE_MESSAGE_MAP()};
The implementation of the class generated by Visual Studio looks like this:
// SignPage.cpp : implementation file//#include "pch.h"#include "App.h"#include "afxdialogex.h"#include "SignPage.h"// SignPage dialogIMPLEMENT_DYNAMIC(SignPage, CDialogEx)SignPage::SignPage(CWnd* pParent /*=nullptr*/) : CDialogEx(IDD_SIGN_PAGE, pParent){}SignPage::~SignPage(){}void SignPage::DoDataExchange(CDataExchange* pDX){ CDialogEx::DoDataExchange(pDX);}BEGIN_MESSAGE_MAP(SignPage, CDialogEx)END_MESSAGE_MAP()// SignPage message handlers
I understand that the array capable of insert is std::vector
, however inserting any Windows generated objects into std::vector
results in "attempting to reference a deleted function" errors as Windows has deleted the copy and move functions in their objects.
I do not want the array capable of insert to molest the Windows provided objects in any way, and so I understand std:unique_ptr
is what I need so that I add a pointer to the Windows provided objects to the list.
I instantiate the object and vector like this, and the compiler likes it:
std::vector<std::unique_ptr<SignPage>> m_dlgs;std::unique_ptr<SignPage> upm_dlg1 = std::make_unique<SignPage>();
Now I try and insert the upm_dlg1
into m_dlgs like this:
std::vector<std::unique_ptr<SignPage>>::iterator it;it = m_dlgs.begin();m_dlgs.insert(it, upm_dlg1); <---- error happens here
The addition of the last line above causes a compile error inside the template rendering unique pointers as follows:
1>C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.40.33807\include\xmemory(700,82): error C2280: 'std::unique_ptr<SignPage,std::default_delete<SignPage>>::unique_ptr(const std::unique_ptr<SignPage,std::default_delete<SignPage>> &)': attempting to reference a deleted function
Does anyone know what steps I must take to fix this?
My limitations are:
The objects I need to add to the array capable of insert are generated by Visual Studio for the benefit of Windows. My options to modify these objects are limited.
The compiler error is being triggered deep inside what I understand to be the template implementing
unique_ptr
. I am assuming this is the joy of c++ compiler errors.I am led to believe that
std::vector
is the collection I should be using, but this may not be the case, can anyone confirm? I have no need for sorting or any other complexity, just a simple array where I can insert and remove without in any way touching the object in the list.