outer-negation

Flag any(!x) / all(!x), which by De Morgan’s law read more clearly with the negation pulled outside: !all(x) and !any(x).

The rule fires only when every positional argument is negated (a na.rm argument is allowed and preserved). The fix is withheld when the call sits in a context that binds tighter than !, where the rewrite would need parentheses.

Negating every element of an aggregation:

if (any(!ok)) stop()

warning: outer-negation
 --> example.R:1:5
  |
1 | if (any(!ok)) stop()
  |     ^^^^^^^^ negating an aggregation is clearer with the negation outside
  = help: `any(!x)` is `!all(x)`; `all(!x)` is `!any(x)`.

After applying the fix:

if (!all(ok)) stop()