[Codename Milan] Cannot specialize variadic template functions

[Codename Milan] Cannot specialize variadic template functions by AndreiTita

Closed

Type:	Bug
ID:	774025
Opened:	12/11/2012 6:59:29 AM
Access Restriction:	Public

Workaround(s)

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User(s) can reproduce this bug

As per the title. Replacing the return or argument types in the shown example produces the same error.

Details (expand)

Visual Studio 2012

Try to compile this code:

template<int, typename... Args>
void myfunc(Args... args) { }

template<>
void myfunc<1, float>(float) { }

English

Windows 7 SP1

English (UK)

Compiler error c2785 ('void myfunc(Args...)' and 'void myfunc(float)' have different return types) and compiler error c2912 (explicit specialization 'void myfunc(float)' is not a specialization of a function template)

Clean compilation.

0 attachments

Posted by Microsoft on 2/11/2013 at 9:53 AM

Hi: this issue has been fixed and the fix should show up in the next release of Visual C++

Thanks
Jonathan Caves
Visual C++ Compiler Team

Posted by UnitUniverse on 1/21/2013 at 3:38 AM

@AndreiTita:
Your code won't be compiled and, however, the following will:

///<Demo>
// ConsoleApplication1.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <functional>
#include <conio.h>

#include "stdlib.h"
#include <iostream>

template<int, typename... Args>
void myfunc(Args... args)
{
}

template<>
void myfunc<1>(float)
{
}

int _tmain(int argc, TCHAR * argv[])
{
    myfunc<0, int>(1);
    myfunc<1, float>(1.0f);

    _getch();
    return 0;
}

///</Demo>

Posted by Microsoft on 12/11/2012 at 9:59 PM

Thanks for your feedback.

We are rerouting this issue to the appropriate group within the Visual Studio Product Team for triage and resolution. These specialized experts will follow-up with your issue.

Posted by Microsoft on 12/11/2012 at 7:50 AM

Thank you for your feedback, we are currently reviewing the issue you have submitted. If this issue is urgent, please contact support directly(http://support.microsoft.com)