Alternative solutions to returning ref types.

[Christopher Wright]

Simen Kjaeraas wrote:
> Just for the fun of it, I decided to try make a property struct, with 
> overloaded operators. Any ideas for how to make this better are welcome.
> Of course, this causes some overhead, but was a fun project, and if it 
> helps anyone, I'm a happy cat.
> 
> 
> Example usage:
> 
> class foo
> {
> private:
>     int _a;
>     float _b;
> public:
>     property!(int) a;
>     property!(float) b;
>     
>     this()
>     {
>         a = &_a;
>         b = &_b;
>     }
> }
> 
> -- Simen

Have you tried it with any UDTs that don't overload all those operators? 
The unary operators will die; the binary ones are hidden behind 
templates so they're okay unless someone uses them.

You'll need guards like:
T opNeg()
{
	static if (is (typeof(-(*data))))
	{
		return -(*data);
	}
	else
	{
		assert (false, "type " ~ T.stringof ~ " does not support this operator."
	}
}