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#![allow(clippy::no_effect, clippy::unnecessary_operation, dead_code)]
#![warn(clippy::cast_lossless)]
// FIXME(f16_f128): add tests for these types once const casting is available
type F32 = f32;
type F64 = f64;
fn main() {
// Test clippy::cast_lossless with casts to floating-point types
let x0 = 1i8;
let _ = f32::from(x0);
//~^ cast_lossless
let _ = f64::from(x0);
//~^ cast_lossless
let _ = F32::from(x0);
//~^ cast_lossless
let _ = F64::from(x0);
//~^ cast_lossless
let x1 = 1u8;
let _ = f32::from(x1);
//~^ cast_lossless
let _ = f64::from(x1);
//~^ cast_lossless
let x2 = 1i16;
let _ = f32::from(x2);
//~^ cast_lossless
let _ = f64::from(x2);
//~^ cast_lossless
let x3 = 1u16;
let _ = f32::from(x3);
//~^ cast_lossless
let _ = f64::from(x3);
//~^ cast_lossless
let x4 = 1i32;
let _ = f64::from(x4);
//~^ cast_lossless
let x5 = 1u32;
let _ = f64::from(x5);
//~^ cast_lossless
// Test with casts from floating-point types
let _ = f64::from(1.0f32);
//~^ cast_lossless
}
// 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
}
}
}
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