Arithmetic lint

[c410-f3r]

Are you guys open to include an allow-by-default restricted lint that will warn +/-///* regardless of the involved type? For example, num-bigint (among others) has arithmetic implementations that aren't triggered by clippy::integer_arithmetic.

If yes, then I will create a PR. If not, then feel free to close this issue.

[llogiq]

This could be a restriction lint, and we may even want to make types to block arithmetic on configurable.

Does it make sense to lint on types like std::num::Wrapping or std::num::Saturating? These can't overflow or panic (apart from
division by zero).

[c410-f3r]

Like @llogiq said, types should be configurable. Built-in types that don't panic would then be listed as allowed somehow.

I was thinking about creating an arithmetic lint that could suppress integer_arithmetic in the long run.