VC11 does not compile valid code using rvalue references by Xentrax [Vyacheslav Lanovets]

Closed

as Deferred Help for as Deferred

Type:	Bug
ID:	767153
Opened:	10/12/2012 1:32:46 AM
Access Restriction:	Public

Workaround(s)

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User(s) can reproduce this bug

VC++ 17.00.50727.1 for x86 does not compile valid C++ code using rvalue references.

According to guys om comp.lang.c++.moderated this is a bug in VC compiler:
https://groups.google.com/d/msg/comp.lang.c++.moderated/HjcLTUvohBk/t5IjszlaG1wJ

Details (expand)

Visual Studio 2012

Try to compile the following
==============================
#include <utility>

struct A
{
        int y;
};
A getA()
{
        return A();
}
void fi(int&& )
{
}
void fa(A&& )
{
}

int main()
{
        fi(std::move(getA()).y); // compiles
        fi(A().y); // 1 -compiles
        fa(A()); // compiles
        fa(getA()); // compiles

        fi(getA().y); // 2 - does not compile. Why?

        return 0;
}

English

Windows 7 SP1

English

x.cpp(25) : error C2664: 'fi' : cannot convert parameter 1 from 'int' to 'int &&'
You cannot bind an lvalue to an rvalue reference

successful compile

0 attachments

Posted by Microsoft on 10/12/2012 at 2:01 AM

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 10/12/2012 at 1:50 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)

Posted by Xentrax [Vyacheslav Lanovets] on 10/12/2012 at 1:34 AM

std::move does the trick:

fi(std::move(getA()).y);

Microsoft