deterministic destruction support for managed types in VC++ 2005beta 1

  • Thread starter Thread starter Slawomir Lisznianski
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Slawomir Lisznianski

Do ref classes indeed support instantiation on the stack? Similarly, can
native classes be instantiated on gc heap?

When you try to have a ref class instance on the stack, you'll get:

R : cannot use this type here without a top-level '^'.

When you try to instantiate a native class using gcnew using Visual
Studio 2005 Beta 1, you'll get:

error C2726: 'gcnew' may only be used to create an object with managed type.

I was going through the C++/CLI Language Specification Working Draft
1.5, Jun, 2004, and nowhere I could find a clause that would make me
believe that managed types are allowed to go on the stack or native heap.

I've read articles, such as this one
http://www.codeguru.com/Csharp/.NET/net_general/visualstudionetadd-ins/article.php/c7405/

that makes all sorts of claims regarding support for deterministic
destruction for managed types. Where is it mentioned in the C++/CLI draft?

Regards,
Slawomir Lisznianski [ www.rhapsodia.org ]
 
Slawomir said:
Do ref classes indeed support instantiation on the stack? Similarly,
can
native classes be instantiated on gc heap?

When you try to have a ref class instance on the stack, you'll get:

R : cannot use this type here without a top-level '^'.

When you try to instantiate a native class using gcnew using Visual
Studio 2005 Beta 1, you'll get:

error C2726: 'gcnew' may only be used to create an object with
managed type.

I was going through the C++/CLI Language Specification Working Draft
1.5, Jun, 2004, and nowhere I could find a clause that would make me
believe that managed types are allowed to go on the stack or native
heap.

I've read articles, such as this one
http://www.codeguru.com/Csharp/.NET/net_general/visualstudionetadd-ins/article.php/c7405/

that makes all sorts of claims regarding support for deterministic
destruction for managed types. Where is it mentioned in the C++/CLI
draft?
Click to expand...

VC++ 2005 will support GC types on the stack, but that support is not in
Beta-1. I don't know about native types on the GC heap. I believe that's
in the long-term plan (complete unification of the GC/native type system),
but I'm not sure if it's in the 2005 compiler or not.

-cd
 
Carl said:
VC++ 2005 will support GC types on the stack, but that support is not in
Beta-1. I don't know about native types on the GC heap. I believe that's
in the long-term plan (complete unification of the GC/native type system),
but I'm not sure if it's in the 2005 compiler or not.
Click to expand...

Unfortunately, creating native classes with gcnew did not make it into the
Visual C++ 2005 release. It's one of the top features for the next major
release of Visual C++.
 
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