“Out” parameters and destructors

[Ogion]

On Monday, 17 March 2025 at 11:40:59 UTC, Nick Treleaven wrote:
> See https://github.com/dlang/dmd/issues/18348.
>
> I think the solution is to always call the destructor before 
> calling the function. However that was not implemented because 
> it would break code that uses `S s = void;`, as `s` might not 
> be a destructible value.

Understandable.

I should note that spec never said that the parameter is expected 
to be uninitialized. However, the fact that some some code relies 
on this behavior can’t be ignored.

I don’t think that “out” parameters worth fixing though. They 
only exist because we don’t have first-class tuples. Once we sort 
this out, we’ll just deprecate the “out” parameters with all 
their warts.