• Marek Janukowicz (27/27) Jul 30 2013 I have quite complicated data structure (class-based) and I need a copy ...
• =?UTF-8?B?QWxpIMOHZWhyZWxp?= (8/18) Jul 30 2013 Fine: That is a requirement of your program. Another program may have

Marek Janukowicz <marek janukowicz.net> writes:

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

=?UTF-8?B?QWxpIMOHZWhyZWxp?= <acehreli yahoo.com> writes:

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