Re: Properties: a.b.c = 3

[Zhenyu Zhou]

Chad J Wrote:
> Currently there are some cases where the current paradigm forces you to
> do that kind of work by hand:
> 
> struct Rectangle
> {
>       float x,y,w,h;
> }
> class Widget
> {
>       Rectangle _rect;
>       Rectangle rect() { return _rect; }
>       Rectangle rect(Rectangle r) { return _rect = r; }
> }
> void main()
> {
>       auto widget = new Widget();
> 
>       // DOES WORK:
>       auto tmp = widget.rect;
>       tmp.w = 200;
>       tmp.h = 100;
>       widget.rect = tmp;
> 
>       // DOES NOT WORK:
>       // widget.rect.w = 200;
>       // widget.rect.h = 100;
> }

What about:

class Widget
{
        Rectangle _rect;
        immutable(Rectangle) rect() const { return _rect; }
        Rectangle rect(Rectangle r) { return _rect = r; }
}