Failing clippy: cast_lossless

[dtolnay]

error: casting u8 to u64 may become silently lossy if types change
   --> src/de.rs:284:31
    |
284 |                 let mut res = (c - b'0') as u64;
    |                               ^^^^^^^^^^^^^^^^^ help: try: `u64::from((c - b'0'))`

(and lots more like this)

[dtolnay]

Suppressed in fd96650.

[oli-obk]

You dislike the lint? Is the issue you have with it just u8 to something else?

[dtolnay]

I agree that u64::from is theoretically safer and more correct but I disagree that there is any practical risk from refactoring the input type wrong. Do you have any examples of this causing problems in practice? Maybe it is the sort of thing I need to experience myself before becoming a believer.