C ++ 11在Visual Studio 2012中的委派构造函数

Question

I am trying to use delegating constructors in Visual Studio 2012. The following code compiles in Xcode 4.6 but not in Visual Studio 2012:

In the .h file

class ErrorReportDlg : public QDialog
{

public:
    ErrorReportDlg(OwlExceptionPtr ex, QWidget *parent);
    ErrorReportDlg(QWidget *parent);

    virtual ~ErrorReportDlg();
}

In the .cpp file

// FWIW, OwlExceptionPtr is 
// typdef boost::shared_ptr<OwlException> OwlExceptionPtr

ErrorReportDlg::ErrorReportDlg(OwlExceptionPtr ex, QWidget *parent)
    : QDialog(parent),
    _error(ex)
{
    // stuff
}

ErrorReportDlg::ErrorReportDlg(QWidget *parent)
    : ErrorReportDlg(OwlExceptionPtr(), parent) // <--- error here
{
    // do nothing
}

The error I'm getting is:

error C2437: 'ErrorReportDlg' : already initialized

What am I doing wrong? Thank you!

Answer 1

As per MSDN , VS 2012 doesn't support delegating constructors out of the box.

You get delegating constructors (and a bunch of other C++11 features) when you install the November 2012 CTP (Compiler Technical Preview). After installing, switch your project to use the CTP as its toolset (via Project properties ), and you're set.