rust-clippy/tests/ui/cast.rs

#![feature(plugin)]
#![plugin(clippy)]

#[deny(cast_precision_loss, cast_possible_truncation, cast_sign_loss, cast_possible_wrap)]
#[allow(no_effect, unnecessary_operation)]
fn main() {
    // Test cast_precision_loss
    1i32 as f32;
    1i64 as f32;
    1i64 as f64;
    1u32 as f32;
    1u64 as f32;
    1u64 as f64;
    1i32 as f64; // Should not trigger the lint
    1u32 as f64; // Should not trigger the lint

    // Test cast_possible_truncation
    1f32 as i32;
    1f32 as u32;

    1f64 as f32;
    1i32 as i8;
    1i32 as u8;

    1f64 as isize;
    1f64 as usize;


    // Test cast_possible_wrap
    1u8 as i8;
    1u16 as i16;
    1u32 as i32;
    1u64 as i64;
    1usize as isize;

    // Test cast_sign_loss
    1i32 as u32;
    1isize as usize;

    // Extra checks for *size
    // Casting from *size
    1isize as i8;
    1isize as f64;
    1usize as f64;
    1isize as f32;
    1usize as f32;
    1isize as i32;
    1isize as u32;

    1usize as u32;
    1usize as i32;

    // Casting to *size
    1i64 as isize;
    1i64 as usize;

    1u64 as isize;

    1u64 as usize;
    1u32 as isize;
    1u32 as usize; // Should not trigger any lint
    1i32 as isize; // Neither should this
    1i32 as usize;

    // Test cast_unnecessary
    1i32 as i32;
    1f32 as f32;
    false as bool;
    &1i32 as &i32;

    // Should not trigger
    1i32 as i64;
    let v = vec!(1);
    &v as &[i32];
    1.0 as f64;
    1 as u64;
}