John Kugelman 21f4677744 Add #[must_use] to expensive computations
The unifying theme for this commit is weak, admittedly. I put together a
list of "expensive" functions when I originally proposed this whole
effort, but nobody's cared about that criterion. Still, it's a decent
way to bite off a not-too-big chunk of work.

Given the grab bag nature of this commit, the messages I used vary quite
a bit.
2021-10-12 23:27:17 -04:00
..