ATL / WTL / STL

Christian Graus wrote:

How do you expect STL components to magically delete themselves ?

<br />
Use auto_ptr<> will delete them for you<br />
#include <memory><br />
<br />
using std::wcout;<br />
using std::endl;<br />
using std::vector;<br />
<br />
class Foo<br />
{<br />
public:<br />
    Foo(int index) : m_index(index)<br />
    {<br />
        wcout << L"Creating Foo #" << m_index << endl;<br />
    }<br />
<br />
    ~Foo()<br />
    {<br />
        wcout << L"Destroying Foo #" << m_index << endl;<br />
    }<br />
private:<br />
    int m_index;<br />
};<br />
<br />
int _tmain(int argc, _TCHAR* argv[])<br />
{<br />
    vector< std::auto_ptr< Foo* > > pFooList;<br />
    <br />
    for (int i = 0; i < 10; ++i)<br />
    {<br />
        pFooList.push_back( std::auto_ptr< Foo* >(new Foo(i)));    <br />
    }<br />
<br />
/* no need to delete, std::auto_ptr takes care if it for you.<br />
//see #include<memory><br />
     for (int i = 0; i < 10; ++i)<br />
    {<br />
        delete pFooList[i];<br />
    }<br />
*/<br />
<br />
    return 0;<br />
}<br />

dfields326 wrote:

Use auto_ptr<> will delete them for you

sawerr wrote:

But i know that we don't need to delete stl componenets

void f()
{
	string s;
}

void f()
{
	string* s = new string;
}

#ifdef _DEBUG
#define new new(_NORMAL_BLOCK, __FILE__, __LINE__)
#endif

<code>
Detected memory leaks!
Dumping objects ->
{53} normal block at 0x002F3CF8, 4 bytes long.
 Data: <    > CD CD CD CD 
Object dump complete.</code>

class X {
   int* p;
public:
   X() : p(new int[100]) { }
   ~X() { delete [] p; }
};
  
void function() {
   X x;
}