/////////////////////////////////////////////////////////////////////
// EmbeddingManaged.cpp - Demonstrates use of unmanaged classes    //
//                        holding pointers to managed objects      //
//                                                                 //
// Jim Fawcett, CSE775 - Distributed Objects, Spring 2003          //
/////////////////////////////////////////////////////////////////////
// Built with Empty Managed C++ Project wizard                     //
/////////////////////////////////////////////////////////////////////

#using <mscorlib.dll>
#include <vcclr.h>          // gcroot, PtrToStringChars
using namespace System;

#include <iostream>
#include <string>
using namespace std;

///////////////////////////////////////////////////////////////
// unmanaged class holding a pointer to a managed object
//
class unmanaged
{
public:
  unmanaged(const std::wstring& str);
  std::wstring get_value();
  void set_value(const std::wstring& str);
private:
  gcroot<System::String^> pStr;  // needed so GC can track pointer
};

unmanaged::unmanaged(const std::wstring& str)
{
  pStr = gcnew String(str.c_str());
}

std::wstring unmanaged::get_value()
{
  pin_ptr<const wchar_t> pRaw = PtrToStringChars(pStr);
  return std::wstring(pRaw);
}

void unmanaged::set_value(const std::wstring& str)
{
  pStr = gcnew String(str.c_str());
}

//----< test unmanaged with embedded managed object >----------

int main()
{
  cout << "\n  Demonstrating Unmanaged Class holding Pointer to Managed"
       << "\n ==========================================================\n";

  unmanaged unMan(L"Hello World");
  wcout << L"\n  " << unMan.get_value();

  unMan.set_value(L"Hello New World");
  wcout << L"\n  " << unMan.get_value() << L"\n\n";
}

  Demonstrating Unmanaged Class holding Pointer to Managed
 ==========================================================

  Hello World
  Hello New World