Re: b.content.x - get property of ...structure|class|...

[Виталий Фадеев via Digitalmars-d-learn]

On Tuesday, 17 March 2020 at 09:31:21 UTC, Виталий Фадеев wrote:
Main goal is: get content "xywh" from given rect and padding.
Of course content.x is dynamic.
//
import core.sys.windows.windows;
import std.stdio;


class Base
{
    RECT rect    = { 0, 0, 500, 400 };
    RECT padding = { 10, 10, 10, 10 };

    // ...content...
    ??? content
    {
        @property int x() const { return rect.left + 
padding.left; }
    }
}

int main()
{
    auto b = new Base();
    writeln( b.content.x );
}



How to implement "b.content.x" ( sequence call "content" of the 
"b" and then "x" of that ) ?
How to implement beauty ?


Now working with this variant:

struct Content
{
    Base This;

    int  left()    { return This.rect.left   + This.padding.left; 
  }
    int  right()   { return This.rect.right  - 
This.padding.right;  }
    int  top()     { return This.rect.top    + This.padding.top;  
  }
    int  bottom()  { return This.rect.bottom - 
This.padding.bottom; }

    int  x()       { return left;         }
    int  y()       { return top;          }
    int  w()       { return right - left; }
    int  h()       { return bottom - top; }

    RECT rect()    { return This.rect; }
}


class Base
{
    RECT rect;
    RECT padding;

    Content content()
    {
        return Content( this );
    }
}