On Mon, Jul 12, 2021 at 9:43 PM Henri Verbeet <hverbeet@gmail.com> wrote:

Personally, adding DECLSPEC_HIDDEN has never particularly bothered me,
but in this particular case, if it bothers you that's probably
sufficient reason. I would be curious about opinions from Matteo and
Conor in particular as well though.

I favour default-hidden. As Zeb said, visible symbols are added much less often than hidden ones, plus I think it would be easier on the eyes without all the DECLSPEC_HIDDEN decorations.