Do managed strings have a deterministic destructor?

[Duncan Smith]

If I set a breakpoint on all four lines within the curly brackets in
VS2005, the 'delete str' breakpoint is always removed and the line
itself is removed from the code.

Why is not possible to call delete on a String^ ref type like it is
for other ref handles? Would it be because the String type has no
protected member called Dispose?

{
String^ str = gcnew String( messageText );
delete str;

IO::StreamReader^ rdr = gcnew IO::StreamReader("d:\\done.txt");
delete rdr;
}

Many thanks,

Duncan

[Ben Voigt [C++ MVP]]

"Duncan Smith" <DS********@googlemail.comwrote in message
news:11**********************@t8g2000prg.googlegro ups.com...

If I set a breakpoint on all four lines within the curly brackets in
VS2005, the 'delete str' breakpoint is always removed and the line
itself is removed from the code.

Why is not possible to call delete on a String^ ref type like it is
for other ref handles? Would it be because the String type has no
protected member called Dispose?

That is my understanding. There's some information at
http://msdn2.microsoft.com/en-us/lib...97(VS.80).aspx but it doesn't
come right out and say that the delete keyword calls IDisposable::Dispose
when invoked on an imported managed type.

>
{
String^ str = gcnew String( messageText );
delete str;

IO::StreamReader^ rdr = gcnew IO::StreamReader("d:\\done.txt");
delete rdr;
}

Many thanks,

Duncan

[Mark Salsbery [MVP]]

"Duncan Smith" <DS********@googlemail.comwrote in message
news:11**********************@t8g2000prg.googlegro ups.com...

If I set a breakpoint on all four lines within the curly brackets in
VS2005, the 'delete str' breakpoint is always removed and the line
itself is removed from the code.

Why is not possible to call delete on a String^ ref type like it is
for other ref handles?
Would it be because the String type has no
protected member called Dispose?

Yes System::String is not a disposable class (no IDisposable interface).

The StreamReader class, however, IS disposable :)

Mark

--
Mark Salsbery
Microsoft MVP - Visual C++

>
{
String^ str = gcnew String( messageText );
delete str;

IO::StreamReader^ rdr = gcnew IO::StreamReader("d:\\done.txt");
delete rdr;
}

Many thanks,

Duncan