tests/ui/lint/trivial-casts.rs

#![deny(trivial_casts, trivial_numeric_casts)]

fn main() {
    let lugubrious = 12i32 as i32;
    //~^ ERROR trivial numeric cast
    let haunted: &u32 = &99;
    let _ = haunted as *const u32;
    //~^ ERROR trivial cast
}