ref and out parameters in C# and cannot be marked as variant.
- by Water Cooler v2
What does the statement mean?
From here
ref and out parameters in C# and
cannot be marked as variant.
1) Does it mean that the following can not be done.
public class SomeClass<R, A>: IVariant<R, A>
{
public virtual R DoSomething( ref A args )
{
return null;
}
}
2) Or does it mean I cannot have the following.
public delegate R Reader<out R, in A>(A arg, string s);
public static void AssignReadFromPeonMethodToDelegate(ref Reader<object, Peon> pReader)
{
pReader = ReadFromPeon;
}
static object ReadFromPeon(Peon p, string propertyName)
{
return p.GetType().GetField(propertyName).GetValue(p);
}
static Reader<object, Peon> pReader;
static void Main(string[] args)
{
AssignReadFromPeonMethodToDelegate(ref pReader);
bCanReadWrite = (bool)pReader(peon, "CanReadWrite");
Console.WriteLine("Press any key to quit...");
Console.ReadKey();
}
I tried (2) and it worked.
