Visual C++ .NET/Generics/Generic Function

Generic function allows the type parameter to be deduced

 
#include "stdafx.h"
using namespace System;
generic < typename T>
void GenericFunction(T t)
{
   Console::WriteLine(t);
}
int main()
{
   int i;
   GenericFunction<int>( 200 );

   GenericFunction( 400 );
}

Generic function and generic array

 
#include "stdafx.h"
using namespace System;
generic < typename T>
void GenericFunction(array<T>^ array_of_t)
{
   for each (T t in array_of_t)
   {
      Console::WriteLine(t);
   }
}
int main()
{
   array<String^>^ array_of_string;
   array_of_string = gcnew array<String^>{ "abc", "def", "ghi" };
   GenericFunction( array_of_string );
}

Generic function demo

 
#include "stdafx.h"
using namespace System;
generic <typename T>
void F(T t, int i, String^ s)
{
}

generic multiple constraints

 

#include "stdafx.h"
using namespace System;
interface class I;
ref class C;
generic <class T> where T : gcnew(), C, I
void F(T t)
{
}
interface class IKey;
generic <typename Key, typename Value>
where Key : IKey
where Value : value class
ref class Dictionary
{
};

generic return value

 
#include "stdafx.h"
using namespace System;
generic <typename T>
T f()
{
   return T();
}
int main()
{
  int i = f<int>();  // OK
  String^ s = f<String^>();  // OK
}

Specify the type parameter for generic function

 
#include "stdafx.h"
using namespace System;
generic < typename T>
void GenericFunction(T t)
{
   Console::WriteLine(t);
}
int main()
{
   int i;
   GenericFunction<int>( 200 );

   GenericFunction( 400 );
}