diff options
Diffstat (limited to '')
-rw-r--r-- | src/tools/clippy/tests/ui/cast_lossless_float.rs | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/cast_lossless_float.rs b/src/tools/clippy/tests/ui/cast_lossless_float.rs new file mode 100644 index 000000000..6f5ddcfe0 --- /dev/null +++ b/src/tools/clippy/tests/ui/cast_lossless_float.rs @@ -0,0 +1,45 @@ +// run-rustfix + +#![allow(clippy::no_effect, clippy::unnecessary_operation, dead_code)] +#![warn(clippy::cast_lossless)] + +fn main() { + // Test clippy::cast_lossless with casts to floating-point types + let x0 = 1i8; + let _ = x0 as f32; + let _ = x0 as f64; + let x1 = 1u8; + let _ = x1 as f32; + let _ = x1 as f64; + let x2 = 1i16; + let _ = x2 as f32; + let _ = x2 as f64; + let x3 = 1u16; + let _ = x3 as f32; + let _ = x3 as f64; + let x4 = 1i32; + let _ = x4 as f64; + let x5 = 1u32; + let _ = x5 as f64; + + // Test with casts from floating-point types + let _ = 1.0f32 as f64; +} + +// 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: f32) -> f64 { + input as f64 +} + +// 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: f32) -> f64 { + x as f64 + } + } +} |