On Wed, Jun 21, 2023, 11:24 AM Михаил Найденов via Std-Proposals <std-proposals@lists.isocpp.org> wrote:
Hello, 
I am resurrecting another old (2018) proposal of mine, I never submitted.

Proposed is to have a postscript operator &&, which either moves or forwards.

Thank You

Language note: postfix operator, not postscript operator. Postscript is like a footnote/endnote.

For the proposal, the symmetry with && is definitely nice.

But it has two unfortunate interactions with logical AND. One you pointed out:

a&&(b)

Another is:

f(xs&&...)
f((xs&&...))

Those two expressions do very different things - the first would forward all the arguments, the second folds over logical AND and is passing a bool. This isn't an ambiguous parse, but it's still a bit problematic from the human comprehension perspective.  

Barry