rust/tests/ui/cast.rs
2019-04-25 12:06:20 +02:00

74 lines
1.5 KiB
Rust

#[warn(
clippy::cast_precision_loss,
clippy::cast_possible_truncation,
clippy::cast_sign_loss,
clippy::cast_possible_wrap
)]
#[allow(clippy::no_effect, clippy::unnecessary_operation)]
fn main() {
// Test clippy::cast_precision_loss
let x0 = 1i32;
x0 as f32;
let x1 = 1i64;
x1 as f32;
x1 as f64;
let x2 = 1u32;
x2 as f32;
let x3 = 1u64;
x3 as f32;
x3 as f64;
// Test clippy::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 clippy::cast_possible_wrap
1u8 as i8;
1u16 as i16;
1u32 as i32;
1u64 as i64;
1usize as isize;
// Test clippy::cast_sign_loss
1i32 as u32;
-1i32 as u32;
1isize as usize;
-1isize as usize;
0i8 as u8;
i8::max_value() as u8;
i16::max_value() as u16;
i32::max_value() as u32;
i64::max_value() as u64;
i128::max_value() as u128;
// Extra checks for *size
// Test cast_unnecessary
1i32 as i32;
1f32 as f32;
false as bool;
&1i32 as &i32;
// macro version
macro_rules! foo {
($a:ident, $b:ident) => {
pub fn $a() -> $b {
1 as $b
}
};
}
foo!(a, i32);
foo!(b, f32);
foo!(c, f64);
// casting integer literal to float is unnecessary
100 as f32;
100 as f64;
100_i32 as f64;
// Should not trigger
#[rustfmt::skip]
let v = vec!(1);
&v as &[i32];
1.0 as f64;
1 as u64;
}