Move Constructor Syntax

[Paul Backus]

On Sunday, 6 October 2024 at 17:06:10 UTC, Walter Bright wrote:
> People took to `~this` like a duck to water, so I don't think 
> it'll be a big deal for `=this` to be a move constructor. After 
> all, it's better than the C++ `S(S&&)` by a mile!

If we adopt `=this` as the move-constructor syntax, what will we 
use if we decide to add a dedicated copy-constructor syntax in 
the future? The `=` symbol is used for both moves and copies, 
after all.