Re: delete construct

From:
Thomas Richter <thor@math.tu-berlin.de>
Newsgroups:
comp.lang.c++.moderated
Date:
Sun, 30 Mar 2008 08:45:56 CST
Message-ID:
<fslt1p$7ud$1@infosun2.rus.uni-stuttgart.de>
moongeegee wrote:

I have a class as below:

class Dpost {
public:
   void* operator new[](size_t) {
     cout << "Allocating a Dpost" << endl;
     throw 1;


Question: Why is this useful? You don't allocate anything. It just
fails over immediately.

   }
   void operator delete[](void* p) {
     cout << "Deallocating a Dpost" << endl;
     ::operator delete[](p);
   }
};

in the main function, I want to clean up the construct.


As nothing's ever allocated, what you need to clean up?

try {
         ......
} catch(int)
       Dpost::operator delete[]();


What are you deleting here? Where's the object array you want to
delete, specifically?

}

  However the compiler prompts me errors as below;

  error: no matching function for call to 'Dpost::operator delete []()'
  note: candidates are: static void Dpost::operator delete [](void*)


The operator delete[] is called whenever you delete an array of objects
of the Dpost class, i.e. if

    a = new Dpost[10];

then
    delete[] a;

will delete this array.

HTHH,
    Thomas

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