move object from heap to stack

[Ali Çehreli]

On 09/20/2012 03:37 AM, monarch_dodra wrote:
 > On Thursday, 20 September 2012 at 10:20:24 UTC, Johannes Pfau wrote:
 >> http://dlang.org/struct.html
 >> D classes do not really have copy constructors. You could assume that
 >> if a constructor has only one argument and it's of the same type as
 >> the class, it's a copy constructor.
 >
 > True... the term "copy constructor" is not 100% accurate, it is just "a
 > constructor that takes the same type"
 >
 > A a = new A(); //Creates a new A
 > A b = a; //Binds to the existing A
 > A c = new A(a); //Constructs a new A, form an old A.

A polymorphic member function would be better for when A is just a base 
class, i.e. when we don't know its actual type (the virtual constructor 
idiom):

void foo(Animal a)
{
     Animal c = a.dup;  // can be any Animal
     // ...
}

Ali