Classes on stack

[Paul Backus]

On Thursday, 1 September 2022 at 18:50:05 UTC, Redwan wrote:
> On Thursday, 1 September 2022 at 18:26:12 UTC, Ali Çehreli 
> wrote:
>> 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
>
> how about `scope this.a = new A();`?

If you want everything on the stack, you have to pass in `a` as 
an argument, like this:

class A {}

class B {
   A a;

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

void main() {
   scope a = new A(); // on stack
   scope b = new B(a); // on stack
}