Move Constructors - Converting Lvalues to Rvalues

[Timon Gehr]

On 10/3/24 17:47, Walter Bright wrote:
> 
> __rvalue() is not a move, it just guides the overload resolution to the 
> move constructor/assignment. It's a hint.

It has to be a move though. An rvalue is owned, an lvalue is not. 
Whenever an lvalue goes into an rvalue, it is either copy or move.

If `__rvalue` is just some sort of ad-hoc type-punning operation 
exclusively for overload resolution, it will often copy the argument, 
unless your intention is to force it to be consumed by a function that 
is implicitly `@move` (such as a move constructor or a move assignment).