diff options
Diffstat (limited to 'src/tools/clippy/tests/ui/cast_lossless_bool.rs')
-rw-r--r-- | src/tools/clippy/tests/ui/cast_lossless_bool.rs | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/cast_lossless_bool.rs b/src/tools/clippy/tests/ui/cast_lossless_bool.rs new file mode 100644 index 000000000..b6f6c59a0 --- /dev/null +++ b/src/tools/clippy/tests/ui/cast_lossless_bool.rs @@ -0,0 +1,42 @@ +// run-rustfix + +#![allow(dead_code)] +#![warn(clippy::cast_lossless)] + +fn main() { + // Test clippy::cast_lossless with casts to integer types + let _ = true as u8; + let _ = true as u16; + let _ = true as u32; + let _ = true as u64; + let _ = true as u128; + let _ = true as usize; + + let _ = true as i8; + let _ = true as i16; + let _ = true as i32; + let _ = true as i64; + let _ = true as i128; + let _ = true as isize; + + // Test with an expression wrapped in parens + let _ = (true | false) as u16; +} + +// 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 + } + } +} |