Просмотр исходного текста страницы Visual C++ .NET/Generics/Generic Function

==Generic function allows the type parameter to be deduced==


   
<source lang="csharp"> 
#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 );
}
   
  </source>


==Generic function and generic array==


   
<source lang="csharp"> 
#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 );
}
   
  </source>


==Generic function demo==


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


==generic multiple constraints==


   
<source lang="csharp"> 

#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
{
};
   
  </source>


==generic return value==


   
<source lang="csharp"> 
#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
}
   
  </source>


==Specify the type parameter for generic function==


   
<source lang="csharp"> 
#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 );
}
   
  </source>