Array type conversion

[Mark Burnett]

janderson Wrote:

> DropApple
> DropApple
> DropApple
> EatOrange  //What the hell, I never called this function.
> DropApple
> 
> 
> //2
> 
> //Even worse, remove the EatOrange
> 
> DropApple
> DropApple
> DropApple
> Error: Access Violation
> 
> 
> The problem is the refcopy.  I'm not sure this sort of conversion should 
> be band.  However I'm not sure what the correct type of checking should 
> be used.  Maybe it should only be converted when passed into the 
> function (otherwise require a .ptr qualifier).  It would still have 
> potential issues but I think it would be less error prone.
> 
> -Joel

Bingo.  D does not exhibit this behavior with interfaces, however, so designers are safe using arrays of interfaces (only!).