/*****************************************************************************
 ***   FILE: typeof.cpp
 ***   DATE: 04/10/2004
 *** AUTHOR: Daniel Dementiev
 ***   GOAL: This example illustrates how to find out the type of a managed
 ***         type using the managed operator "__typeof()".
 ***         Please note that the base class 'BattleObject' derived from the
 ***         MS managed class 'Object'. That allows us to use the method
 ***         GetType().
 ***         To build the project run:
 ***          ...> cl typeof.cpp /clr
 *****************************************************************************/

#using <mscorlib.dll>
using namespace System;
using namespace System::Collections;

__gc class BattleObject : public Object {
   public:
      virtual void print() { Console::WriteLine(S"BattleObject"); };
};

__gc class Robot : public BattleObject {
   public:
      void print() { Console::WriteLine(S"Robot"); };
};

__gc class Cannon : public BattleObject {
   public:
      void print() { Console::WriteLine(S"Cannon"); };
};

void main()
{
   int i;
   BattleObject *list[] = new BattleObject*[15];

   for(i=0;i<15;i++)
      switch( i%3 ){
         case 0: list[i] = new BattleObject(); break;
         case 1: list[i] = new Robot(); break;
         case 2: list[i] = new Cannon(); break;
      }

   Type *t;
   for(i=0;i<list->Length;i++){
      t = __typeof(Robot);
      if( t->Equals(list[i]->GetType()) )  list[i]->print();
   }

   Console::WriteLine(S"Object hierarchy:");
   for(i=0;i<3;i++){
      Type *type = list[i]->GetType();
      while( type ){
         Console::Write(S" {0} ->", type->Name);
         type = type->BaseType;
      }
      Console::WriteLine(S"\b\b  ");
   }
}