Note that if we're talking opt-in warnings, Rust's linting tool Clippy offers a whole bunch of warnings related to `as` casts. See https://rust-lang.github.io/r

Note that if we're talking opt-in warnings, Rust's linting tool Clippy offers a whole bunch of warnings related to `as` casts. See https://rust-lang.github.io/rust-clippy/master/index.html#as_conversions https://rust-lang.github.io/rust-clippy/master/index.html#as... .