这是编译器的错误吗？我做错了吗？ [英] Is this a compiler bug? Am I doing something wrong?

问题描述

我正在尝试一个简单的地图来查找一些数据，但结果很奇怪：

I'm trying to make a simple map to look up some data, but the results are coming out very strange:

#include "stdafx.h"
#include "atlstr.h"
#include <map>

enum InputTypes { Manual, Automatic, Assisted, Imported, Offline };

struct Params
{
    int inputType;
    const char* moduleName;
    DWORD flag;
};

int _tmain()
{
    std::map<CString, Params> options {
        { "Add",       { Manual,    "RecordLib",  0 } },
        { "Open",      { Assisted,  "ViewLib",    1 } },
        { "Close",     { Imported,  "EditLib",    2 } },
        { "Inventory", { Automatic, "ControlLib", 3 } },
        { "Report",    { Offline,   "ReportLib",  4 } }
    };

    for (std::map<CString, Params>::iterator iter = options.begin(); iter != options.end(); ++iter)
    {
        printf("Entry: %s ==> { %d, %s, %d }\n", (const char*)(iter->first),
            iter->second.inputType, iter->second.moduleName, iter->second.flag);
    }


    return 0;
}

输出：

Entry: îþîþîþîþîþîþîþîþîþîþîþîþ[â0; t ==> { 0, RecordLib, 0 }
Entry: Close ==> { 3, EditLib, 2 }
Entry: Inventory ==> { 1, ControlLib, 3 }
Entry: îþîþîþîþîþîþîþîþîþîþîþîþCâ0# t ==> { 2, ViewLib, 1 }
Entry: Report ==> { 4, ReportLib, 4 }

正如你所看到的，一些CString值转为垃圾。
但我没有看到任何原因，我无法以这种方式创建地图。

As you can see, a couple of the CString values turned to garbage. But I don't see any reason why I couldn't create a map this way.

这是Microsoft Visual Studio中的一个错误2013编译器？

有没有什么特别的代码，我错过了？

Is this a bug in the Microsoft Visual Studio 2013 compiler?
Is there something peculiar about my code that I'm missing?

## ##########编辑##############

############ Edit ##############

对于那些谁认为这是 CString 的问题，我用 std :: string 重新写入，输出更差：

For those who think this is a problem with CString, I re-wrote it with std::string, and got worse output:

#include "stdafx.h"
#include "atlstr.h"
#include <map>

enum InputTypes { Manual, Automatic, Assisted, Imported, Offline };

struct Params
{
    int inputType;
    std::string moduleName;
    DWORD flag;
};

int _tmain(int argc, _TCHAR* argv[])
{
    std::map<std::string, Params> options{
        { "Add",       { Manual, "RecordLib", 0 } },
        { "Open",      { Assisted, "ViewLib", 1 } },
        { "Close",     { Imported, "EditLib", 2 } },
        { "Inventory", { Automatic, "ControlLib", 3 } },
        { "Report",    { Offline, "ReportLib", 4 } }
    };

    for (std::map<std::string, Params>::iterator iter = options.begin(); iter != options.end(); ++iter)
    {
        printf("Entry: %s ==> { %d, %s, %d }\n", iter->first.c_str(),
            iter->second.inputType, iter->second.moduleName.c_str(), iter->second.flag);
    }
    return 0;
}

输出

Entry:  ==> { 0, , 0 }
Entry: Report ==> { 4, , 4 }

请注意，这在 IDEOne

推荐答案

我将您的示例复制到MSVC中。它甚至超过了内容印刷 - 这是ATL CSt中的内存违反，在销毁地图时。但所有的工作与std :: string。结论 - ATL实施错误。如果我想要一个野蛮的猜测，我会说，这是一个移动构造函数的错误。

I have copied you example into MSVC. It is even more than incorret printing - it is a memory violation in ATL CString upon destruction of map. But all works with std::string. Conclusion - buggy ATL implementation. If I am to take a wild guess, I'd say, it's a bug in move constructor.

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