On Saturday, June 8, 2024, Robert A.H. Leahy wrote:

>
> Classes with unconstrained unary constructors are just broken, as you've
> discovered.
>


So then should we write a paper to deprecate unary unconstrained
constructors in C++26?

I don't think there's anything wrong with unary unconstrained constructors.
I see how they're inconvenient for 'std::elide', but doesn't make them
inherently broken.