class does not exist in namespace error

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Hi,
I have following classes
following code is defined in nurse.h

#pragma once
#include "shift.h"
namespace Manage{
	private ref class nurse
	{
List<shift^> ^_daysServedlst;//here comes the error that shift is not defined in Manage Though it is available in auto complete list
...
};
}

the following code block is defined in shift.h

#pragma once
#include "nurse.h"
namespace Manage
{
	using namespace System;
	using namespace System ::Collections ::Generic ;
	
 private ref class shift : IComparable
	{
};

the problem is the compilation error occurs when I try to make an object of shift class in any function of nurse class
Error message error C2039: 'shift' : is not a member of 'Manage'
Please help

Posted 21-Jun-11 8:02am

J imran

Updated 21-Jun-11 8:29am

v3

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Comments

Albert Holguin 21-Jun-11 14:14pm

So this looks like C#, not C++... tag accordingly...

Sergey Alexandrovich Kryukov 21-Jun-11 14:31pm

No, not C#, this is C++/CLI (which is not C++).
--SA

Albert Holguin 21-Jun-11 15:15pm

that's why I didn't retag myself... :)

J imran 21-Jun-11 14:18pm

it is c++

Sergey Alexandrovich Kryukov 21-Jun-11 14:27pm

No! This is C++/CLI, which is not C++, strictly speaking. Tag it!
--SA

Sergey Alexandrovich Kryukov 21-Jun-11 14:29pm

The code is incomplete, but the error is obvious.
--SA

J imran 21-Jun-11 14:30pm

any suggestion?

1 solution

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Sergey Alexandrovich Kryukov · Accepted Answer · 2011-06-21T08:30:00

Solution 1

Stop cross-include of your header files and you will be fine. Put the declarations in one header file, for example.

You also need forward class declaration. For example:

C++

ref class BBB;
public ref class AAA {
    BBB^ bbb;
    //...
};

public ref class BBB {
    AAA^ aaa;
    //...
};

It won't be possible if you used not class references by the instances in by-value semantic, by obvious reasons: instantiation would cause infinite construction due to infinite constructor recursion.

—SA

Posted 21-Jun-11 8:30am

Sergey Alexandrovich Kryukov

Updated 21-Jun-11 9:32am

v3

Comments

J imran 21-Jun-11 14:43pm

thank you. It works.

Sergey Alexandrovich Kryukov 21-Jun-11 14:52pm

You're welcome.
Thanks for accepting the solution, but it was incomplete. The root of the problem is the lack of forward declaration. Solution updated.
Good luck, call again.
--SA

J imran 21-Jun-11 15:38pm

bool DayExists(shift ^_shift)
{
bool reply = false;
for (int i = 0; i < _daysServedlst->Count; i++)
{
if (_daysServedlst[i]->ShiftInfo->DayNumber == _shift->ShiftInfo->DayNumber)
{
reply=true;
break;
}
}
return reply;
}
I have done what you said. I am facing strange problems. this function is defined in nurse class. I have included the declarations in a single Manage.h file. here comes the error Shift does not exist in Manage namespace. Though making an object of shift in nurse class works fine. I am not sure why in if statement there comes error.

Mark Salsbery 21-Jun-11 15:56pm

You state "Shift does not exist in Manage namespace." but nowhere do you use "Shift" in that code. C# and C++ are case-sensitive and require names to be exact, not just close. ;) So what aren't you showing us?

J imran 21-Jun-11 16:01pm

is there any free tool to convert c# to c++

Mark Salsbery 21-Jun-11 16:14pm

I don't know of any, but it should be a relatively easy direction to go since there's probably no unmanaged code involved. Most code can be copied then the syntax changes applied. All code can pretty much go right in the header files in the class declarations...see the CLR Windows Forms application project template for an example of how to lay out your project file structure - the only code in CPP file is the main() function.

J imran 21-Jun-11 16:18pm

well I am not sure why class diagram tool is not working with managed code. I am getting crazy as I can't visualize what I am doing. I can see unmanaged class diagrams but not managed ones.

Mark Salsbery 21-Jun-11 16:26pm

You get limited support for many things in managed C++, and they won't be there in the future. Interesting that you're required to convert from C# where there's great support for intellisense, class diagrams, refactoring, etc. etc...

J imran 21-Jun-11 16:30pm

that is what I am wondering why my client need c++. I made the project in C# the big mistake was we didn't agreed on any language. Now He says he don't know c# make it in c++. I am really puzzled. he has taken me years back.
Any how thanks for help.

Mark Salsbery 21-Jun-11 16:32pm

Are you sure the client understands it's MANAGED C++? Totally different language than C++. Maybe the client expects unmanaged C++?

J imran 21-Jun-11 16:40pm

Probably this is the case. Well is there any possibility to use managed Library in unmanaged code without making any trouble. I am in a great trouble now as I have used List in my c# code. that doesn't seem usable in unmanaged c++.

Mark Salsbery 21-Jun-11 16:53pm

You may want to find out for sure :) If you can use managed c++ then converting from C# will be much easier. As for the List class, there are plenty of similar collection classes available for native C++. I certainly wouldn't mix in managed code just for that.

J imran 22-Jun-11 2:40am

good news. My client is convinced to continue with c#.
Thank you for all the help.
Regards

Sergey Alexandrovich Kryukov 22-Jun-11 18:14pm

Congratulations! For future, never agree with the customer right away, stay for your opinion. If you fail to argue your point of view, it can turn out bad for both side, but you will be the one to be blamed; if you stand for your solution and win, every one wins. "Customer is always right" is plain lie. I don't know clever people using this principle in real life.
Good luck,
--SA

J imran 22-Jun-11 22:43pm

Thank you for wishes.
yes you are right Customer is always right... I was worried for the outcomes of dispute. Feeling great to solve it.
Regards

Sergey Alexandrovich Kryukov 23-Jun-11 0:30am

Hm... actually my statement was:
"Customer is always right" is plain lie.

Glad for you that you got rid of monkey job. Happy programming!
--SA

Sergey Alexandrovich Kryukov 22-Jun-11 18:00pm

I don't know either, basically agree with Mark.
--SA

J imran 21-Jun-11 15:41pm

actually I have made this application in c#. My client now wants it in c++. I am having a tough time rewriting thousands of lines