mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-09-20 14:41:58 +00:00
50 lines
1.2 KiB
Rust
50 lines
1.2 KiB
Rust
#![allow(clippy::no_effect, clippy::unnecessary_operation, dead_code)]
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#![warn(clippy::cast_lossless)]
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// FIXME(f16_f128): add tests for these types once const casting is available
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type F32 = f32;
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type F64 = f64;
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fn main() {
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// Test clippy::cast_lossless with casts to floating-point types
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let x0 = 1i8;
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let _ = f32::from(x0);
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let _ = f64::from(x0);
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let _ = F32::from(x0);
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let _ = F64::from(x0);
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let x1 = 1u8;
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let _ = f32::from(x1);
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let _ = f64::from(x1);
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let x2 = 1i16;
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let _ = f32::from(x2);
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let _ = f64::from(x2);
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let x3 = 1u16;
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let _ = f32::from(x3);
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let _ = f64::from(x3);
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let x4 = 1i32;
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let _ = f64::from(x4);
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let x5 = 1u32;
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let _ = f64::from(x5);
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// Test with casts from floating-point types
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let _ = f64::from(1.0f32);
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}
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// The lint would suggest using `f64::from(input)` here but the `XX::from` function is not const,
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// so we skip the lint if the expression is in a const fn.
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// See #3656
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const fn abc(input: f32) -> f64 {
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input as f64
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}
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// Same as the above issue. We can't suggest `::from` in const fns in impls
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mod cast_lossless_in_impl {
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struct A;
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impl A {
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pub const fn convert(x: f32) -> f64 {
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x as f64
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}
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}
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}
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