Classes or stucts :: Newbie

[Denis Koroskin]

On Mon, 20 Dec 2010 18:00:31 +0300, David Currie <curriedr at iinet.net.au>  
wrote:

> I am new to D (like many have done C++ , Java ).
>
> Can a class be instantiated on the stack ?
>
> eg
>
> class C
> {
>    private  int _I1;
>    private  int _I2;
>
>    public:
>
>    this(int pI) // constructor
>    {
>      _I1 = pI;
>      _I2 = pI + 1;
>    }
>
> // ...  other methods etc
> }
>
> void f()  // just a function
> {
>
>    C myC(3);  // C++ syntax BUT is there a d equivalent
>
> }
>
> It appears that D ASSUMES myC is really a myC*(in C++)
>
> and therefore requires
>
> C myC = new C(3);
> // but this ALWAYS requires calling the memory allocator
> // this is what Java does (forces your Class instance onto the Heap)
>
> Is there any way in D to instantiate a stack object ?
>
> Will a struct do?
>
> Does a struct have a constructor (as opposed to an opcall?)
>
> I would be very grateful for a response.
>
> David Currie
>
>

Try the following:

scope c = new C(3);

Unfortunately last I've heard it's going to be deprecated in favor of a  
library solution:

InSitu!(C) c = InSitu!(C)(3); // IIRC not implemented yet