3 #![allow(clippy::no_effect, clippy::unnecessary_operation, dead_code)]
4 #![warn(clippy::cast_lossless)]
7 // Test clippy::cast_lossless with casts to integer types
8 let _ = i16::from(1i8);
9 let _ = i32::from(1i8);
10 let _ = i64::from(1i8);
11 let _ = i16::from(1u8);
12 let _ = i32::from(1u8);
13 let _ = i64::from(1u8);
14 let _ = u16::from(1u8);
15 let _ = u32::from(1u8);
16 let _ = u64::from(1u8);
17 let _ = i32::from(1i16);
18 let _ = i64::from(1i16);
19 let _ = i32::from(1u16);
20 let _ = i64::from(1u16);
21 let _ = u32::from(1u16);
22 let _ = u64::from(1u16);
23 let _ = i64::from(1i32);
24 let _ = i64::from(1u32);
25 let _ = u64::from(1u32);
27 // Test with an expression wrapped in parens
28 let _ = u16::from(1u8 + 1u8);
31 // The lint would suggest using `f64::from(input)` here but the `XX::from` function is not const,
32 // so we skip the lint if the expression is in a const fn.
34 const fn abc(input: u16) -> u32 {
38 // Same as the above issue. We can't suggest `::from` in const fns in impls
39 mod cast_lossless_in_impl {
43 pub const fn convert(x: u32) -> u64 {