src/tools/clippy/tests/ui/cast_lossless_bool.fixed

   1 //@run-rustfix
   2
   3 #![allow(dead_code)]
   4 #![warn(clippy::cast_lossless)]
   5
   6 fn main() {
   7     // Test clippy::cast_lossless with casts to integer types
   8     let _ = u8::from(true);
   9     let _ = u16::from(true);
  10     let _ = u32::from(true);
  11     let _ = u64::from(true);
  12     let _ = u128::from(true);
  13     let _ = usize::from(true);
  14
  15     let _ = i8::from(true);
  16     let _ = i16::from(true);
  17     let _ = i32::from(true);
  18     let _ = i64::from(true);
  19     let _ = i128::from(true);
  20     let _ = isize::from(true);
  21
  22     // Test with an expression wrapped in parens
  23     let _ = u16::from(true | false);
  24 }
  25
  26 // The lint would suggest using `u32::from(input)` here but the `XX::from` function is not const,
  27 // so we skip the lint if the expression is in a const fn.
  28 // See #3656
  29 const fn abc(input: bool) -> u32 {
  30     input as u32
  31 }
  32
  33 // Same as the above issue. We can't suggest `::from` in const fns in impls
  34 mod cast_lossless_in_impl {
  35     struct A;
  36
  37     impl A {
  38         pub const fn convert(x: bool) -> u64 {
  39             x as u64
  40         }
  41     }
  42 }
  43
  44 #[clippy::msrv = "1.27"]
  45 fn msrv_1_27() {
  46     let _ = true as u8;
  47 }
  48
  49 #[clippy::msrv = "1.28"]
  50 fn msrv_1_28() {
  51     let _ = u8::from(true);
  52 }