implicit casts

[BCS]

Reply to Ender,

> there should be some way to define implicit casts either to or from
> user defined types.  this would greatly reduce the amount of code
> since functions would no longer have to be overloaded for as many
> times. ex: a fraction class does not need to overload opAdd since
> integers can be implictly converted to fractions.
> 

this would also simplify some things like what is described here:

http://andersnoras.com/blogs/anoras/archive/2007/07/09/behind-the-scenes-of-the-planning-dsl.aspx

things like this would be really slick

|class EventComponent
|{
|  class Attend
|  {
|    Attend AreRequired(){ ... return this; }
|    Attend AreOptional(){ ... return this; }
|
|    EventComponent opImplicitCast(){return super;}  // this
|  }
|
|  static EventComponent opImplicitCast(Attendants f){return f.super;} // 
or this
|
|  Attendants{char[][] names...)
|  {
|    return new Attend(names);
|  }
|}
|
|EventComponent e = new EventComponent();
|e.Attendants("joe", "jane").AreRequired.Attendants("bob", "bill").AreOptional;