Problem with "delete" and what about "friend" classes & functions?

[Kirk McDonald]

John Kiro wrote:
> Hello
> 
> I have a problem with this statement:
> 
>   delete pDoc.getFile();
> 
> It generates this error:
> 
> "Error: ((cast(CDoc)(pDoc)).getFile)() is not an lvalue"
> 
> The getFile() is a member of CDoc (pDoc is an object of a CDoc
> derived class), and is defined like this:
> 
>   CFile getFile()
>   {
> 	return m_pFile;
>   }
> 
> So any idea about the reason of this error?
> The code compiles successfully if I replace the delete statement with:
> 
>   CFile tmpFile=pDoc.getFile();
>   delete tmpFile;
> 

'delete' also sets the reference to null. Therefore, it must operate on 
an lvalue.

> Another point, I guess D doesn't support "friend" classes or
> functions.. wouldn't they be useful sometimes?
> 

Everything in the same module is a 'friend'.

-- 
Kirk McDonald
Pyd: Wrapping Python with D
http://pyd.dsource.org