Christian Trott b0c769a80b
[libc++][mdspan] Fix extents CTAD (#68737)
extents CTAD was requiring default constructibility of the extent
arguments due to the way we implemented a pack expansion. This
requirement is not in the standard.

Reported in issue #68671
https://github.com/llvm/llvm-project/issues/68671 by @hewillk.

Fixes #68671
2023-10-12 13:09:36 -06:00
..