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无法使用功能指针的std ::映射

发布于 2025-01-28 09:44:58 字数 12741 浏览 2 评论 0原文

为什么此代码无法编译？

std::map<SetAssignNameFunc, GetAssignNameFunc> mapAssignNameFunctions =
{
    {&CChristianLifeMinistryEntry::SetVideoHost, &CChristianLifeMinistryEntry::GetVideoHost},
    {&CChristianLifeMinistryEntry::SetVideoCohost, &CChristianLifeMinistryEntry::GetVideoCohost},
    {&CChristianLifeMinistryEntry::SetChairman, &CChristianLifeMinistryEntry::GetChairman},
    {&CChristianLifeMinistryEntry::SetAuxiliaryCounsellor1, &CChristianLifeMinistryEntry::GetAuxiliaryCounsellor1},
    {&CChristianLifeMinistryEntry::SetAuxiliaryCounsellor2, &CChristianLifeMinistryEntry::GetAuxiliaryCounsellor2},
    {&CChristianLifeMinistryEntry::SetOpenPrayer, &CChristianLifeMinistryEntry::GetOpenPrayer},
    {&CChristianLifeMinistryEntry::SetTreasures1, &CChristianLifeMinistryEntry::GetTreasures1},
    {&CChristianLifeMinistryEntry::SetTreasures2, &CChristianLifeMinistryEntry::GetTreasures2},
    {&CChristianLifeMinistryEntry::SetLiving1, &CChristianLifeMinistryEntry::GetLiving1},
    {&CChristianLifeMinistryEntry::SetLiving2, &CChristianLifeMinistryEntry::GetLiving2},
    {&CChristianLifeMinistryEntry::SetLiving2b, &CChristianLifeMinistryEntry::GetLiving2b},
    {&CChristianLifeMinistryEntry::SetCBSConductor, &CChristianLifeMinistryEntry::GetCBSConductor},
    {&CChristianLifeMinistryEntry::SetCBSReader, &CChristianLifeMinistryEntry::GetCBSReader},
    {&CChristianLifeMinistryEntry::SetClosePrayer, &CChristianLifeMinistryEntry::GetClosePrayer}
};

这两个定义是：

using GetAssignNameFunc = CString (CChristianLifeMinistryEntry::*)() const;
using SetAssignNameFunc = void (CChristianLifeMinistryEntry::*)(CString);

完整的代码是：

std::vector<GetAssignNameFunc> CChristianLifeMinistryEditorDlg::PreprocessAutoAssignActions(const AutoAssignActionVector &vAutoAssignActions)
{
    std::vector<GetAssignNameFunc> vpfnGetAssignNames;
    std::map<SetAssignNameFunc, GetAssignNameFunc> mapAssignNameFunctions =
    {
        {&CChristianLifeMinistryEntry::SetVideoHost, &CChristianLifeMinistryEntry::GetVideoHost},
        {&CChristianLifeMinistryEntry::SetVideoCohost, &CChristianLifeMinistryEntry::GetVideoCohost},
        {&CChristianLifeMinistryEntry::SetChairman, &CChristianLifeMinistryEntry::GetChairman},
        {&CChristianLifeMinistryEntry::SetAuxiliaryCounsellor1, &CChristianLifeMinistryEntry::GetAuxiliaryCounsellor1},
        {&CChristianLifeMinistryEntry::SetAuxiliaryCounsellor2, &CChristianLifeMinistryEntry::GetAuxiliaryCounsellor2},
        {&CChristianLifeMinistryEntry::SetOpenPrayer, &CChristianLifeMinistryEntry::GetOpenPrayer},
        {&CChristianLifeMinistryEntry::SetTreasures1, &CChristianLifeMinistryEntry::GetTreasures1},
        {&CChristianLifeMinistryEntry::SetTreasures2, &CChristianLifeMinistryEntry::GetTreasures2},
        {&CChristianLifeMinistryEntry::SetLiving1, &CChristianLifeMinistryEntry::GetLiving1},
        {&CChristianLifeMinistryEntry::SetLiving2, &CChristianLifeMinistryEntry::GetLiving2},
        {&CChristianLifeMinistryEntry::SetLiving2b, &CChristianLifeMinistryEntry::GetLiving2b},
        {&CChristianLifeMinistryEntry::SetCBSConductor, &CChristianLifeMinistryEntry::GetCBSConductor},
        {&CChristianLifeMinistryEntry::SetCBSReader, &CChristianLifeMinistryEntry::GetCBSReader},
        {&CChristianLifeMinistryEntry::SetClosePrayer, &CChristianLifeMinistryEntry::GetClosePrayer}
    };
    for (const auto& sAutoAssignAction : vAutoAssignActions)
    {
        vpfnGetAssignNames.push_back(mapAssignNameFunctions.at(sAutoAssignAction.pfnSetAssignName));
    }
}

但是当我编译时：

7＆gt; xstddef（117,22）：错误c2296：'＆lt;'：无效，因为左操作数具有'const _ty' 7＆gt;和 7＆gt; [ 7＆gt; _ty = setAssignnamefunc 7＆gt;这是给出的 7＆gt; XSTDDEF（116）：消息：编译类模板成员函数'bool std :: Less :: lister :: operator（）（const _ty＆amp;，const _ty＆amp;）const' 7＆gt;和 7＆gt; [ 7＆gt; _ty = setAssignnamefunc 7＆gt;这是给出的 7＆gt; xutility（1453）：消息：请参阅函数模板的引用'bool std :: sely :: liste :: operator（）（const _ty＆amp;，const _ty＆amp;）const'已编译为 7＆gt;和 7＆gt; [ 7＆gt; _ty = setAssignnamefunc 7＆gt;这是给出的 7＆gt; xmemory（1360）：消息：参考类模板实例化'std :: Less'正在编译 7＆gt; xmemory（1360）：消息：参考变量模板'const bool is_empty_v＆lt; std :: Less＆lt; void（__cdecl（__cdecl） GT ＆gt; ＆gt;'被编译 7＆gt; map（73）：消息：请参阅类模板实例化的参考'std :: _ treestd :: _ tmap_traits＆lt; _ _kty，_ty，_ty，_pr，_pr，_alloc，false＆gt;'被编译 7＆gt;和 7＆gt; [ 7＆gt; _kty = setAssignnamefunc， 7＆gt; _ty = getAssignnamefunc， 7＆gt; _pr = STD :: SINS 7＆gt; _alloc = std ::分配器＆lt; std :: pair＆lt; const setAssignnamefunc，getAssignNamefunc＆gt;＆gt;＆gt; 7＆gt;这是给出的 7＆gt; Christian -lifemoinistereditordlg.cpp（9502）：消息：请参阅类模板实例化'std :: map＆lt; setassignnamefunc，getassignnamefunc，std :: Less，std，std :: sitd :: Arlocator＆std :: selocator＆std :: :: ;'被编译 7＆gt; c：\ program Files \ Microsoft Visual Studio \ 2022 \ Community \ VC \ Tools \ MSVC \ MSVC \ 14.32.31326 \ Inclupply \ XSTDDDEF（117,22）：错误C2297：'＆lt; 'const _ty' 7＆gt;和 7＆gt; [ 7＆gt; _ty = setAssignnamefunc 7＆gt; ]

我尝试过的更新

：

    std::unordered_map<SetAssignNameFunc, GetAssignNameFunc, SetAssignNameFuncHash> mapAssignNameFunctions =
    {
        {&CChristianLifeMinistryEntry::SetVideoHost, &CChristianLifeMinistryEntry::GetVideoHost},
        {&CChristianLifeMinistryEntry::SetVideoCohost, &CChristianLifeMinistryEntry::GetVideoCohost},
        {&CChristianLifeMinistryEntry::SetChairman, &CChristianLifeMinistryEntry::GetChairman},
        {&CChristianLifeMinistryEntry::SetAuxiliaryCounsellor1, &CChristianLifeMinistryEntry::GetAuxiliaryCounsellor1},
        {&CChristianLifeMinistryEntry::SetAuxiliaryCounsellor2, &CChristianLifeMinistryEntry::GetAuxiliaryCounsellor2},
        {&CChristianLifeMinistryEntry::SetOpenPrayer, &CChristianLifeMinistryEntry::GetOpenPrayer},
        {&CChristianLifeMinistryEntry::SetTreasures1, &CChristianLifeMinistryEntry::GetTreasures1},
        {&CChristianLifeMinistryEntry::SetTreasures2, &CChristianLifeMinistryEntry::GetTreasures2},
        {&CChristianLifeMinistryEntry::SetLiving1, &CChristianLifeMinistryEntry::GetLiving1},
        {&CChristianLifeMinistryEntry::SetLiving2, &CChristianLifeMinistryEntry::GetLiving2},
        {&CChristianLifeMinistryEntry::SetLiving2b, &CChristianLifeMinistryEntry::GetLiving2b},
        {&CChristianLifeMinistryEntry::SetCBSConductor, &CChristianLifeMinistryEntry::GetCBSConductor},
        {&CChristianLifeMinistryEntry::SetCBSReader, &CChristianLifeMinistryEntry::GetCBSReader},
        {&CChristianLifeMinistryEntry::SetClosePrayer, &CChristianLifeMinistryEntry::GetClosePrayer}
    };


    for (const auto& sAutoAssignAction : vAutoAssignActions)
    {
        vpfnGetAssignNames.push_back(mapAssignNameFunctions.at(sAutoAssignAction.pfnSetAssignName));
    }

但是在此行上运行时我会得到一个例外：

vpfnGetAssignNames.push_back(mapAssignNameFunctions.at(sAutoAssignAction.pfnSetAssignName));

它说：

std :: out_of_range在内存位置

我的当前方法（有效）是：

std::vector<GetAssignNameFunc> CChristianLifeMinistryEditorDlg::PreprocessAutoAssignActions(const AutoAssignActionVector &vAutoAssignActions)
{
    std::vector<GetAssignNameFunc> vpfnGetAssignNames;

    /*
    std::unordered_map<SetAssignNameFunc, GetAssignNameFunc, SetAssignNameFuncHash> mapAssignNameFunctions =
    {
        {&CChristianLifeMinistryEntry::SetVideoHost, &CChristianLifeMinistryEntry::GetVideoHost},
        {&CChristianLifeMinistryEntry::SetVideoCohost, &CChristianLifeMinistryEntry::GetVideoCohost},
        {&CChristianLifeMinistryEntry::SetChairman, &CChristianLifeMinistryEntry::GetChairman},
        {&CChristianLifeMinistryEntry::SetAuxiliaryCounsellor1, &CChristianLifeMinistryEntry::GetAuxiliaryCounsellor1},
        {&CChristianLifeMinistryEntry::SetAuxiliaryCounsellor2, &CChristianLifeMinistryEntry::GetAuxiliaryCounsellor2},
        {&CChristianLifeMinistryEntry::SetOpenPrayer, &CChristianLifeMinistryEntry::GetOpenPrayer},
        {&CChristianLifeMinistryEntry::SetTreasures1, &CChristianLifeMinistryEntry::GetTreasures1},
        {&CChristianLifeMinistryEntry::SetTreasures2, &CChristianLifeMinistryEntry::GetTreasures2},
        {&CChristianLifeMinistryEntry::SetLiving1, &CChristianLifeMinistryEntry::GetLiving1},
        {&CChristianLifeMinistryEntry::SetLiving2, &CChristianLifeMinistryEntry::GetLiving2},
        {&CChristianLifeMinistryEntry::SetLiving2b, &CChristianLifeMinistryEntry::GetLiving2b},
        {&CChristianLifeMinistryEntry::SetCBSConductor, &CChristianLifeMinistryEntry::GetCBSConductor},
        {&CChristianLifeMinistryEntry::SetCBSReader, &CChristianLifeMinistryEntry::GetCBSReader},
        {&CChristianLifeMinistryEntry::SetClosePrayer, &CChristianLifeMinistryEntry::GetClosePrayer}
    };


    for (const auto& sAutoAssignAction : vAutoAssignActions)
    {
        vpfnGetAssignNames.push_back(mapAssignNameFunctions.at(sAutoAssignAction.pfnSetAssignName));
    }
    */

    const auto IsProcessingAutoAssignAction = [&](SetAssignNameFunc pfnSetAssignName)
    {
        for (const S_MWB_AUTO_ASSIGN_ACTION sAutoAssignAction : vAutoAssignActions)
        {
            if (sAutoAssignAction.pfnSetAssignName == pfnSetAssignName)
            {
                return true;
            }
        }
        return false;
    };

    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetVideoHost))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetVideoHost);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetVideoCohost))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetVideoCohost);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetChairman))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetChairman);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetAuxiliaryCounsellor1))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetAuxiliaryCounsellor1);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetAuxiliaryCounsellor2))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetAuxiliaryCounsellor2);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetOpenPrayer))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetOpenPrayer);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetClosePrayer))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetClosePrayer);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetTreasures1))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetTreasures1);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetTreasures2))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetTreasures2);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetLiving1))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetLiving1);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetLiving2))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetLiving2);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetLiving2b))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetLiving2b);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetCBSConductor))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetCBSConductor);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetCBSReader))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetCBSReader);
    }

    return vpfnGetAssignNames;
}

我已经调试了，它在那里：

“在此处输入图像描述”

原文

Why is this code failing to compile?

std::map<SetAssignNameFunc, GetAssignNameFunc> mapAssignNameFunctions =
{
    {&CChristianLifeMinistryEntry::SetVideoHost, &CChristianLifeMinistryEntry::GetVideoHost},
    {&CChristianLifeMinistryEntry::SetVideoCohost, &CChristianLifeMinistryEntry::GetVideoCohost},
    {&CChristianLifeMinistryEntry::SetChairman, &CChristianLifeMinistryEntry::GetChairman},
    {&CChristianLifeMinistryEntry::SetAuxiliaryCounsellor1, &CChristianLifeMinistryEntry::GetAuxiliaryCounsellor1},
    {&CChristianLifeMinistryEntry::SetAuxiliaryCounsellor2, &CChristianLifeMinistryEntry::GetAuxiliaryCounsellor2},
    {&CChristianLifeMinistryEntry::SetOpenPrayer, &CChristianLifeMinistryEntry::GetOpenPrayer},
    {&CChristianLifeMinistryEntry::SetTreasures1, &CChristianLifeMinistryEntry::GetTreasures1},
    {&CChristianLifeMinistryEntry::SetTreasures2, &CChristianLifeMinistryEntry::GetTreasures2},
    {&CChristianLifeMinistryEntry::SetLiving1, &CChristianLifeMinistryEntry::GetLiving1},
    {&CChristianLifeMinistryEntry::SetLiving2, &CChristianLifeMinistryEntry::GetLiving2},
    {&CChristianLifeMinistryEntry::SetLiving2b, &CChristianLifeMinistryEntry::GetLiving2b},
    {&CChristianLifeMinistryEntry::SetCBSConductor, &CChristianLifeMinistryEntry::GetCBSConductor},
    {&CChristianLifeMinistryEntry::SetCBSReader, &CChristianLifeMinistryEntry::GetCBSReader},
    {&CChristianLifeMinistryEntry::SetClosePrayer, &CChristianLifeMinistryEntry::GetClosePrayer}
};

The two definitions are:

using GetAssignNameFunc = CString (CChristianLifeMinistryEntry::*)() const;
using SetAssignNameFunc = void (CChristianLifeMinistryEntry::*)(CString);

The complete code is:

std::vector<GetAssignNameFunc> CChristianLifeMinistryEditorDlg::PreprocessAutoAssignActions(const AutoAssignActionVector &vAutoAssignActions)
{
    std::vector<GetAssignNameFunc> vpfnGetAssignNames;
    std::map<SetAssignNameFunc, GetAssignNameFunc> mapAssignNameFunctions =
    {
        {&CChristianLifeMinistryEntry::SetVideoHost, &CChristianLifeMinistryEntry::GetVideoHost},
        {&CChristianLifeMinistryEntry::SetVideoCohost, &CChristianLifeMinistryEntry::GetVideoCohost},
        {&CChristianLifeMinistryEntry::SetChairman, &CChristianLifeMinistryEntry::GetChairman},
        {&CChristianLifeMinistryEntry::SetAuxiliaryCounsellor1, &CChristianLifeMinistryEntry::GetAuxiliaryCounsellor1},
        {&CChristianLifeMinistryEntry::SetAuxiliaryCounsellor2, &CChristianLifeMinistryEntry::GetAuxiliaryCounsellor2},
        {&CChristianLifeMinistryEntry::SetOpenPrayer, &CChristianLifeMinistryEntry::GetOpenPrayer},
        {&CChristianLifeMinistryEntry::SetTreasures1, &CChristianLifeMinistryEntry::GetTreasures1},
        {&CChristianLifeMinistryEntry::SetTreasures2, &CChristianLifeMinistryEntry::GetTreasures2},
        {&CChristianLifeMinistryEntry::SetLiving1, &CChristianLifeMinistryEntry::GetLiving1},
        {&CChristianLifeMinistryEntry::SetLiving2, &CChristianLifeMinistryEntry::GetLiving2},
        {&CChristianLifeMinistryEntry::SetLiving2b, &CChristianLifeMinistryEntry::GetLiving2b},
        {&CChristianLifeMinistryEntry::SetCBSConductor, &CChristianLifeMinistryEntry::GetCBSConductor},
        {&CChristianLifeMinistryEntry::SetCBSReader, &CChristianLifeMinistryEntry::GetCBSReader},
        {&CChristianLifeMinistryEntry::SetClosePrayer, &CChristianLifeMinistryEntry::GetClosePrayer}
    };
    for (const auto& sAutoAssignAction : vAutoAssignActions)
    {
        vpfnGetAssignNames.push_back(mapAssignNameFunctions.at(sAutoAssignAction.pfnSetAssignName));
    }
}

But when I compile:

7>xstddef(117,22): error C2296: '<': not valid as left operand has type 'const _Ty'
7> with
7> [
7> _Ty=SetAssignNameFunc
7> ]
7>xstddef(116): message : while compiling class template member function 'bool std::less::operator ()(const _Ty &,const _Ty &) const'
7> with
7> [
7> _Ty=SetAssignNameFunc
7> ]
7>xutility(1453): message : see reference to function template instantiation 'bool std::less::operator ()(const _Ty &,const _Ty &) const' being compiled
7> with
7> [
7> _Ty=SetAssignNameFunc
7> ]
7>xmemory(1360): message : see reference to class template instantiation 'std::less' being compiled
7>xmemory(1360): message : see reference to variable template 'const bool is_empty_v<std::less<void (__cdecl CChristianLifeMinistryEntry::*)(ATL::CStringT<wchar_t,StrTraitMFC<wchar_t,ATL::ChTraitsCRT<wchar_t> > >)> >' being compiled
7>map(73): message : see reference to class template instantiation 'std::_Treestd::_Tmap_traits<_Kty,_Ty,_Pr,_Alloc,false>' being compiled
7> with
7> [
7> _Kty=SetAssignNameFunc,
7> _Ty=GetAssignNameFunc,
7> _Pr=std::less,
7> _Alloc=std::allocator<std::pair<const SetAssignNameFunc,GetAssignNameFunc>>
7> ]
7>ChristianLifeMinistryEditorDlg.cpp(9502): message : see reference to class template instantiation 'std::map<SetAssignNameFunc,GetAssignNameFunc,std::less,std::allocator<std::pair<const SetAssignNameFunc,GetAssignNameFunc>>>' being compiled
7>C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.32.31326\include\xstddef(117,22): error C2297: '<': not valid as right operand has type 'const _Ty'
7> with
7> [
7> _Ty=SetAssignNameFunc
7> ]

Update

I tried:

    std::unordered_map<SetAssignNameFunc, GetAssignNameFunc, SetAssignNameFuncHash> mapAssignNameFunctions =
    {
        {&CChristianLifeMinistryEntry::SetVideoHost, &CChristianLifeMinistryEntry::GetVideoHost},
        {&CChristianLifeMinistryEntry::SetVideoCohost, &CChristianLifeMinistryEntry::GetVideoCohost},
        {&CChristianLifeMinistryEntry::SetChairman, &CChristianLifeMinistryEntry::GetChairman},
        {&CChristianLifeMinistryEntry::SetAuxiliaryCounsellor1, &CChristianLifeMinistryEntry::GetAuxiliaryCounsellor1},
        {&CChristianLifeMinistryEntry::SetAuxiliaryCounsellor2, &CChristianLifeMinistryEntry::GetAuxiliaryCounsellor2},
        {&CChristianLifeMinistryEntry::SetOpenPrayer, &CChristianLifeMinistryEntry::GetOpenPrayer},
        {&CChristianLifeMinistryEntry::SetTreasures1, &CChristianLifeMinistryEntry::GetTreasures1},
        {&CChristianLifeMinistryEntry::SetTreasures2, &CChristianLifeMinistryEntry::GetTreasures2},
        {&CChristianLifeMinistryEntry::SetLiving1, &CChristianLifeMinistryEntry::GetLiving1},
        {&CChristianLifeMinistryEntry::SetLiving2, &CChristianLifeMinistryEntry::GetLiving2},
        {&CChristianLifeMinistryEntry::SetLiving2b, &CChristianLifeMinistryEntry::GetLiving2b},
        {&CChristianLifeMinistryEntry::SetCBSConductor, &CChristianLifeMinistryEntry::GetCBSConductor},
        {&CChristianLifeMinistryEntry::SetCBSReader, &CChristianLifeMinistryEntry::GetCBSReader},
        {&CChristianLifeMinistryEntry::SetClosePrayer, &CChristianLifeMinistryEntry::GetClosePrayer}
    };


    for (const auto& sAutoAssignAction : vAutoAssignActions)
    {
        vpfnGetAssignNames.push_back(mapAssignNameFunctions.at(sAutoAssignAction.pfnSetAssignName));
    }

But I get a exception when running on this line:

vpfnGetAssignNames.push_back(mapAssignNameFunctions.at(sAutoAssignAction.pfnSetAssignName));

It says:

std::out_of_range at memory location

My current approach (which works) is:

std::vector<GetAssignNameFunc> CChristianLifeMinistryEditorDlg::PreprocessAutoAssignActions(const AutoAssignActionVector &vAutoAssignActions)
{
    std::vector<GetAssignNameFunc> vpfnGetAssignNames;

    /*
    std::unordered_map<SetAssignNameFunc, GetAssignNameFunc, SetAssignNameFuncHash> mapAssignNameFunctions =
    {
        {&CChristianLifeMinistryEntry::SetVideoHost, &CChristianLifeMinistryEntry::GetVideoHost},
        {&CChristianLifeMinistryEntry::SetVideoCohost, &CChristianLifeMinistryEntry::GetVideoCohost},
        {&CChristianLifeMinistryEntry::SetChairman, &CChristianLifeMinistryEntry::GetChairman},
        {&CChristianLifeMinistryEntry::SetAuxiliaryCounsellor1, &CChristianLifeMinistryEntry::GetAuxiliaryCounsellor1},
        {&CChristianLifeMinistryEntry::SetAuxiliaryCounsellor2, &CChristianLifeMinistryEntry::GetAuxiliaryCounsellor2},
        {&CChristianLifeMinistryEntry::SetOpenPrayer, &CChristianLifeMinistryEntry::GetOpenPrayer},
        {&CChristianLifeMinistryEntry::SetTreasures1, &CChristianLifeMinistryEntry::GetTreasures1},
        {&CChristianLifeMinistryEntry::SetTreasures2, &CChristianLifeMinistryEntry::GetTreasures2},
        {&CChristianLifeMinistryEntry::SetLiving1, &CChristianLifeMinistryEntry::GetLiving1},
        {&CChristianLifeMinistryEntry::SetLiving2, &CChristianLifeMinistryEntry::GetLiving2},
        {&CChristianLifeMinistryEntry::SetLiving2b, &CChristianLifeMinistryEntry::GetLiving2b},
        {&CChristianLifeMinistryEntry::SetCBSConductor, &CChristianLifeMinistryEntry::GetCBSConductor},
        {&CChristianLifeMinistryEntry::SetCBSReader, &CChristianLifeMinistryEntry::GetCBSReader},
        {&CChristianLifeMinistryEntry::SetClosePrayer, &CChristianLifeMinistryEntry::GetClosePrayer}
    };


    for (const auto& sAutoAssignAction : vAutoAssignActions)
    {
        vpfnGetAssignNames.push_back(mapAssignNameFunctions.at(sAutoAssignAction.pfnSetAssignName));
    }
    */

    const auto IsProcessingAutoAssignAction = [&](SetAssignNameFunc pfnSetAssignName)
    {
        for (const S_MWB_AUTO_ASSIGN_ACTION sAutoAssignAction : vAutoAssignActions)
        {
            if (sAutoAssignAction.pfnSetAssignName == pfnSetAssignName)
            {
                return true;
            }
        }
        return false;
    };

    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetVideoHost))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetVideoHost);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetVideoCohost))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetVideoCohost);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetChairman))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetChairman);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetAuxiliaryCounsellor1))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetAuxiliaryCounsellor1);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetAuxiliaryCounsellor2))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetAuxiliaryCounsellor2);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetOpenPrayer))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetOpenPrayer);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetClosePrayer))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetClosePrayer);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetTreasures1))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetTreasures1);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetTreasures2))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetTreasures2);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetLiving1))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetLiving1);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetLiving2))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetLiving2);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetLiving2b))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetLiving2b);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetCBSConductor))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetCBSConductor);
    }
    if (!IsProcessingAutoAssignAction(&CChristianLifeMinistryEntry::SetCBSReader))
    {
        vpfnGetAssignNames.push_back(&CChristianLifeMinistryEntry::GetCBSReader);
    }

    return vpfnGetAssignNames;
}

I have debugged and it is there:

enter image description here

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薄荷港 2025-02-04 09:44:58

如所述（或至少在注释中暗示），您需要为您的地图提供自定义比较器，因为默认值（std :: Less Less>）无法将指针与函数进行比较。确切地评估一个这样的功能指针是否比另一个功能指针少，但仅比较它们的实际值（铸造到适当尺寸的整数），这种比较器类看起来像这样的setAssignnamefunc键入地图的键：

struct MyCompare {
public:
    bool operator()(const SetAssignNameFunc& f1, const SetAssignNameFunc& f2) const {
        return reinterpret_cast<intptr_t>(&f1) < reinterpret_cast<intptr_t>(&f2);
    }
};

然后，您需要将该类添加为地图声明中的第三个模板参数：

std::map<SetAssignNameFunc, GetAssignNameFunc, MyCompare> mapAssignNameFunctions =
{
    {&CChristianLifeMinistryEntry::SetVideoHost, &CChristianLifeMinistryEntry::GetVideoHost},
    //...

但是，由于不确定性（不确定的行为？），涉及使用此类幼稚的比较，您可能会发现对于您的情况，std :: unordered_map更健壮。这样的无序地图只需要哈希函数（可以将指针的地址归还给size_t），除非您有 非常那张地图，我看不出缺乏订购会导致任何有问题的效率损失：

struct MyHash {
public:
    size_t operator()(const SetAssignNameFunc& f) const {
        return reinterpret_cast<size_t>(&f);
    }
};

然后为您的地图使用此声明：

std::unordered_map<SetAssignNameFunc, GetAssignNameFunc, MyHash> mapAssignNameFunctions =
{
    {&CChristianLifeMinistryEntry::SetVideoHost, &CChristianLifeMinistryEntry::GetVideoHost},
    //...```

As mentioned (or, at least, hinted at) in the comments, you will need to provide a custom comparator for your map, because the default (std::less) cannot compare pointers to functions. Exactly how you would evaluate whether or not one such function pointer is less than another is not entirely clear but, just comparing their actual values (cast to suitably sized integers), such a comparator class would look something like this for your SetAssignNameFunc type as the map's key:

struct MyCompare {
public:
    bool operator()(const SetAssignNameFunc& f1, const SetAssignNameFunc& f2) const {
        return reinterpret_cast<intptr_t>(&f1) < reinterpret_cast<intptr_t>(&f2);
    }
};

You then need to add that class as the third template parameter in your map declaration:

std::map<SetAssignNameFunc, GetAssignNameFunc, MyCompare> mapAssignNameFunctions =
{
    {&CChristianLifeMinistryEntry::SetVideoHost, &CChristianLifeMinistryEntry::GetVideoHost},
    //...

However, due to the uncertainty (undefined behaviour?) involved in using such naïve comparisons on pointers, you may find that a std::unordered_map is more robust, for your case. Such an unordered map would require only a hash function (which can return the pointer's address cast to a size_t) and, unless you have a very large number of methods to place in that map, I can't see that the lack of ordering would cause any problematical efficiency loss:

struct MyHash {
public:
    size_t operator()(const SetAssignNameFunc& f) const {
        return reinterpret_cast<size_t>(&f);
    }
};

Then use this declaration for your map:

std::unordered_map<SetAssignNameFunc, GetAssignNameFunc, MyHash> mapAssignNameFunctions =
{
    {&CChristianLifeMinistryEntry::SetVideoHost, &CChristianLifeMinistryEntry::GetVideoHost},
    //...```
回复 原文
不气馁 2025-02-04 09:44:58

我想到，我可以使用不同的逻辑来解决这个问题：

std::vector<GetAssignNameFunc> CChristianLifeMinistryEditorDlg::PreprocessAutoAssignActions(const AutoAssignActionVector &vAutoAssignActions)
{
    std::vector<GetAssignNameFunc> vpfnGetAssignNames;

    std::map<EnumHistAssignType, GetAssignNameFunc> mapAssignNameFunctions =
    {
        {EnumHistAssignType::Host, &CChristianLifeMinistryEntry::GetVideoHost},
        {EnumHistAssignType::CoHost, &CChristianLifeMinistryEntry::GetVideoCohost},
        {EnumHistAssignType::Chairman, &CChristianLifeMinistryEntry::GetChairman},
        {EnumHistAssignType::AuxCounsellor1, &CChristianLifeMinistryEntry::GetAuxiliaryCounsellor1},
        {EnumHistAssignType::AuxCounsellor2, &CChristianLifeMinistryEntry::GetAuxiliaryCounsellor2},
        {EnumHistAssignType::OpenPrayer, &CChristianLifeMinistryEntry::GetOpenPrayer},
        {EnumHistAssignType::Treasures1, &CChristianLifeMinistryEntry::GetTreasures1},
        {EnumHistAssignType::Treasures2, &CChristianLifeMinistryEntry::GetTreasures2},
        {EnumHistAssignType::Living1, &CChristianLifeMinistryEntry::GetLiving1},
        {EnumHistAssignType::Living2, &CChristianLifeMinistryEntry::GetLiving2},
        {EnumHistAssignType::Living3, &CChristianLifeMinistryEntry::GetLiving2b},
        {EnumHistAssignType::ConductorCBS, &CChristianLifeMinistryEntry::GetCBSConductor},
        {EnumHistAssignType::ReaderCBS, &CChristianLifeMinistryEntry::GetCBSReader},
        {EnumHistAssignType::ClosePrayer, &CChristianLifeMinistryEntry::GetClosePrayer}
    };

    for (const auto& sAutoAssignAction : vAutoAssignActions)
    {
        auto eAssignHistType = MWBAutoAssign::VectorEnumAssignmentType.at(sAutoAssignAction.iOriginalAssignindex);
        vpfnGetAssignNames.push_back(mapAssignNameFunctions.at(eAssignHistType));
    }

    return vpfnGetAssignNames;
}

It occurred to me that I could get around this issue by using different logic:

std::vector<GetAssignNameFunc> CChristianLifeMinistryEditorDlg::PreprocessAutoAssignActions(const AutoAssignActionVector &vAutoAssignActions)
{
    std::vector<GetAssignNameFunc> vpfnGetAssignNames;

    std::map<EnumHistAssignType, GetAssignNameFunc> mapAssignNameFunctions =
    {
        {EnumHistAssignType::Host, &CChristianLifeMinistryEntry::GetVideoHost},
        {EnumHistAssignType::CoHost, &CChristianLifeMinistryEntry::GetVideoCohost},
        {EnumHistAssignType::Chairman, &CChristianLifeMinistryEntry::GetChairman},
        {EnumHistAssignType::AuxCounsellor1, &CChristianLifeMinistryEntry::GetAuxiliaryCounsellor1},
        {EnumHistAssignType::AuxCounsellor2, &CChristianLifeMinistryEntry::GetAuxiliaryCounsellor2},
        {EnumHistAssignType::OpenPrayer, &CChristianLifeMinistryEntry::GetOpenPrayer},
        {EnumHistAssignType::Treasures1, &CChristianLifeMinistryEntry::GetTreasures1},
        {EnumHistAssignType::Treasures2, &CChristianLifeMinistryEntry::GetTreasures2},
        {EnumHistAssignType::Living1, &CChristianLifeMinistryEntry::GetLiving1},
        {EnumHistAssignType::Living2, &CChristianLifeMinistryEntry::GetLiving2},
        {EnumHistAssignType::Living3, &CChristianLifeMinistryEntry::GetLiving2b},
        {EnumHistAssignType::ConductorCBS, &CChristianLifeMinistryEntry::GetCBSConductor},
        {EnumHistAssignType::ReaderCBS, &CChristianLifeMinistryEntry::GetCBSReader},
        {EnumHistAssignType::ClosePrayer, &CChristianLifeMinistryEntry::GetClosePrayer}
    };

    for (const auto& sAutoAssignAction : vAutoAssignActions)
    {
        auto eAssignHistType = MWBAutoAssign::VectorEnumAssignmentType.at(sAutoAssignAction.iOriginalAssignindex);
        vpfnGetAssignNames.push_back(mapAssignNameFunctions.at(eAssignHistType));
    }

    return vpfnGetAssignNames;
}
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