#![allow(dead_code)] #![warn(clippy::cast_lossless)] fn main() { // Test clippy::cast_lossless with casts to integer types let _ = u8::from(true); let _ = u16::from(true); let _ = u32::from(true); let _ = u64::from(true); let _ = u128::from(true); let _ = usize::from(true); let _ = i8::from(true); let _ = i16::from(true); let _ = i32::from(true); let _ = i64::from(true); let _ = i128::from(true); let _ = isize::from(true); // Test with an expression wrapped in parens let _ = u16::from(true | false); } // The lint would suggest using `u32::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: bool) -> 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: bool) -> u64 { x as u64 } } } #[clippy::msrv = "1.27"] fn msrv_1_27() { let _ = true as u8; } #[clippy::msrv = "1.28"] fn msrv_1_28() { let _ = u8::from(true); }