Replacement for C++ Style Implicit casts?

[Denis Koroskin]

On Mon, 18 Oct 2010 23:47:40 +0400, Mike Chaten <mchaten at gmail.com> wrote:

> In C++ it is possible to declare a class as follows
> class Foo {
> Foo(int x) { }
> }
> You can then use that constructor to implicitly convert int to Foo. E.g
> Foo x = 0; //equivalent to Foo(0)
>
> Is there a way in D to do an implicit or explicit conversion from an
> integral type to a class?
>
> -Mike

For structs the following works:

struct Foo
{
	this(int x) { ... }
}

Foo x = 0;

Classes are allocated on heap and as such there is no way to achieve the  
same.