#![feature(plugin)] #![plugin(clippy)] #[deny(needless_bool)] fn main() { let x = true; if x { true } else { true }; //~ERROR this if-then-else expression will always return true if x { false } else { false }; //~ERROR this if-then-else expression will always return false if x { true } else { false }; //~ERROR you can reduce this if-then-else expression to just `x` if x { false } else { true }; //~ERROR you can reduce this if-then-else expression to just `!x` if x { x } else { false }; // would also be questionable, but we don't catch this yet }