Classes on stack

[Ali Çehreli]

On 9/1/22 10:59, Redwan wrote:
> On Thursday, 1 September 2022 at 13:53:06 UTC, IGotD- wrote:

>> If you have any classes in the class you allocate on the stack, the 
>> constructor of the class will allocate them on the heap. Basically 
>> only the top level class will be on stack.
> 
> Can you give an example?
> 

Sorry to jump in but the following program demonstrates this by pointer 
values:

import std.stdio;

class A {
   int i;
}

class B {
   A a;
   int i;

   this() {
     this.a = new A();
   }
}

void main() {
   scope b = new B();
   int i;

   writeln("on stack: ", &i);
   writeln("on stack: ", &b.i);
   writeln("on heap : ", &b.a.i);
}

Ali