Why are opCall's not implicitely assignable?

[Ivan Senji]

Karen Lanrap wrote:
> Derek Parnell wrote:
> 
>>   with car.roof
>>   {
>>      .topcoat = COLOR.RED;
>>      .undercoat = COLOR.WHITE;
>>   }
>>
>> is nice too.
> 
> Until someone says: topcoat is _not_ a color. It is concrete material 
> that surely must have a property called color, but it is not a color 
> itself: this code is totally unreadable for me.

IMO (and knowing this NG) this is about a point in time where you will 
stop getting responses to your posts. It usually has something to do 
with a person refusing to understand a principal as basic as this one.

As for the example. It is all up to you: if topcoat is a color property then

    with car.roof
    {
       .topcoat = COLOR.RED;
       .undercoat = COLOR.WHITE;
    }

else (it is a property of type coat):

    with car.roof
    {
       .topcoat.color = COLOR.RED;
       .undercoat.color = COLOR.WHITE;
    }


> 
> (By the way: forgetting to delete a point can have desastrous results 
> in D.)

What point?