I have quite complicated data structure (class-based) and I need a copy of it in a Task (std.parallelism). There is a simplification of data structure and my program:

class A {
 B [] arr;
}

class B {
  C c;
}

class C {
  A a;
}

void main () {
  a = new A();
  ... // Further initialization of data structure
  auto taskObject = new TaskObject( a );
  auto t = task(taskObject);
  taskPool.put( t );
}

Now "a" in my task is the same as "a" in main thread and I'd like a local copy - to be precise I need to make changes to a in the task, but they should not affect main copy. Is it possible to somehow create copy automatically when creating a task, or do I need to create it myself? If the latter - is there anything in std lib that helps with creation of deep clones or an I completely on my own?

-- 
Marek Janukowicz

On 07/30/2013 01:15 PM, Marek Janukowicz wrote:

> class A {
>   B [] arr;
> }

> Now "a" in my task is the same as "a" in main thread and I'd like a local
> copy - to be precise I need to make changes to a in the task, but they
> should not affect main copy.

Fine: That is a requirement of your program. Another program may have different requirements.

> Is it possible to somehow create copy automatically when creating a task, or
> do I need to create it myself?

It is possible to write a general function that performs deep copying of members and others have implemented such functions.

> If the latter - is there anything in std lib that helps with creation of
> deep clones

I doubt it.

Ali