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// run-rustfix
#![allow(clippy::no_effect, clippy::unnecessary_operation, dead_code)]
#![warn(clippy::cast_lossless)]
fn main() {
// Test clippy::cast_lossless with casts to integer types
let _ = i16::from(1i8);
let _ = i32::from(1i8);
let _ = i64::from(1i8);
let _ = i16::from(1u8);
let _ = i32::from(1u8);
let _ = i64::from(1u8);
let _ = u16::from(1u8);
let _ = u32::from(1u8);
let _ = u64::from(1u8);
let _ = i32::from(1i16);
let _ = i64::from(1i16);
let _ = i32::from(1u16);
let _ = i64::from(1u16);
let _ = u32::from(1u16);
let _ = u64::from(1u16);
let _ = i64::from(1i32);
let _ = i64::from(1u32);
let _ = u64::from(1u32);
// Test with an expression wrapped in parens
let _ = u16::from(1u8 + 1u8);
}
// The lint would suggest using `f64::from(input)` here but the `XX::from` function is not const,
// so we skip the lint if the expression is in a const fn.
// See #3656
const fn abc(input: u16) -> u32 {
input as u32
}
// Same as the above issue. We can't suggest `::from` in const fns in impls
mod cast_lossless_in_impl {
struct A;
impl A {
pub const fn convert(x: u32) -> u64 {
x as u64
}
}
}
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