class CFoo{
  public void destroy(){ delete this; } // ok
  public void forget(){ this = null; }   // ok but no effect
}

void
main(){
  auto l_fooA = new CFoo;

  auto l_fooB = l_fooA;
  l_fooA.forget; // no effect
  l_fooA = null;  // now ok

  l_fooB.destroy;  // ok
}

Reply to Zarathustra,

> class CFoo{
> public void destroy(){ delete this; } // ok
> public void forget(){ this = null; }   // ok but no effect
> }

that doesn't work because this is a hidden arg to the function, you can change its value but as with any other local value that doesn't effect the value used to call the function.

> void
> main(){
> auto l_fooA = new CFoo;
> auto l_fooB = l_fooA;
> l_fooA.forget; // no effect
> l_fooA = null;  // now ok
> l_fooB.destroy;  // ok }
> 

On Wed, 06 Aug 2008 22:05:48 +0400, BCS <ao@pathlink.com> wrote:

> Reply to Zarathustra,
>
>> class CFoo{
>> public void destroy(){ delete this; } // ok
>> public void forget(){ this = null; }   // ok but no effect
>> }


In fact, this should be disallowed (and it is in c++).

>
> that doesn't work because this is a hidden arg to the function, you can change its value but as with any other local value that doesn't effect the value used to call the function.
>
>> void
>> main(){
>> auto l_fooA = new CFoo;
>> auto l_fooB = l_fooA;
>> l_fooA.forget; // no effect
>> l_fooA = null;  // now ok
>> l_fooB.destroy;  // ok }
>>
>

BCS Wrote:

> Reply to Zarathustra,
> 
> > class CFoo{
> > public void destroy(){ delete this; } // ok
> > public void forget(){ this = null; }   // ok but no effect
> > }
> 
> that doesn't work because this is a hidden arg to the function, you can change its value but as with any other local value that doesn't effect the value used to call the function.
> 
> > void
> > main(){
> > auto l_fooA = new CFoo;
> > auto l_fooB = l_fooA;
> > l_fooA.forget; // no effect
> > l_fooA = null;  // now ok
> > l_fooB.destroy;  // ok }
> > 
> 
> 
Reply to BCS,

Ok thanks for explain it. All regards!