Question

The following code results in C3867 (…function call missing argument list…) and C3350 (…a delegate constructor expects 2 argument(s)…). What am I doing wrong?

    public ref class Form1 : public System::Windows::Forms::Form     {     public:         bool IsEven(int i){             return (i % 2) == 0;         }          Form1(void)         {             numbers = gcnew array<int>{                 1, 2, 3, 4, 5, 6, 7, 8, 9, 10             };              array<int> ^even = Array::FindAll(                 numbers, gcnew Predicate<int>(IsEven));         }     }; 

Answer 1

In C++/CLI you have to pass the actual instance of the type containing the function:

 array<int> ^even = Array::FindAll(     numbers, gcnew Predicate<int>(this, &Test::IsEven)); 

(or make your IsEven method static)