why is it a class property cannot be used like a.b ~= c; ?

[someone]

On Saturday, 4 September 2021 at 23:57:09 UTC, jfondren wrote:

> You're returning a copy of a slice, so if this compiled nothing 
> useful would happen anyway. This works if `whatever()` returns 
> `ref dstring` instead, with no other changes. Search 
> https://dlang.org/spec/function.html for 'lvalue' and this pops 
> right up.

At first glance it seems a bit counter-intuitive but yes, you are 
right, thanks for the link jfronden :)