gcnew

gcnew creates an instance of a managed type (reference or value type) on the garbage collected heap. The result of the evaluation of a gcnew expression is a handle (^) to the type being created.

Remarks

Managed types in C++/CLI are supported by garbage collection. Where native C++ types require using new and delete, managed C++ C++/CLI types need only gcnew.

Example

// mcppv2_gcnew_1.cpp
// compile with: /clr
ref struct Message {
   System::String ^ sender, ^ receiver, ^ data;
};

int main() {
   Message ^ h_Message  = gcnew Message ;
}

It is possible to create an instance of a managed type, where the managed type contains a nested type other than a reference type:

// mcppv2_gcnew_2.cpp
// compile with: /clr
ref class MyClass {
public:
   void Test() {}

   value class Value_Nested_Class {
   public:
      int i;
   };
};

int main() {
   MyClass ^ h_MyClass = gcnew MyClass;
   
   MyClass::Value_Nested_Class y;
   y.i = 32;
   System::Console::WriteLine(y.i);
}

32

Requirements

Compiler option: /clr

See Also

Concepts

Language Features for Targeting the CLR