152 lines
3.0 KiB
Rust
152 lines
3.0 KiB
Rust
#![allow(clippy::no_effect, clippy::unnecessary_operation, dead_code)]
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#![warn(clippy::cast_lossless)]
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type I64Alias = i64;
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fn main() {
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// Test clippy::cast_lossless with casts to integer types
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u16::from(0u8);
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//~^ cast_lossless
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i16::from(0u8);
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//~^ cast_lossless
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u32::from(0u8);
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//~^ cast_lossless
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i32::from(0u8);
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//~^ cast_lossless
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u64::from(0u8);
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//~^ cast_lossless
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i64::from(0u8);
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//~^ cast_lossless
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u128::from(0u8);
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//~^ cast_lossless
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i128::from(0u8);
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//~^ cast_lossless
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u32::from(0u16);
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//~^ cast_lossless
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i32::from(0u16);
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//~^ cast_lossless
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u64::from(0u16);
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//~^ cast_lossless
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i64::from(0u16);
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//~^ cast_lossless
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u128::from(0u16);
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//~^ cast_lossless
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i128::from(0u16);
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//~^ cast_lossless
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u64::from(0u32);
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//~^ cast_lossless
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i64::from(0u32);
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//~^ cast_lossless
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u128::from(0u32);
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//~^ cast_lossless
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i128::from(0u32);
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//~^ cast_lossless
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u128::from(0u64);
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//~^ cast_lossless
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i128::from(0u64);
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//~^ cast_lossless
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i16::from(0i8);
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//~^ cast_lossless
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i32::from(0i8);
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//~^ cast_lossless
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i64::from(0i8);
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//~^ cast_lossless
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i128::from(0i8);
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//~^ cast_lossless
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i32::from(0i16);
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//~^ cast_lossless
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i64::from(0i16);
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//~^ cast_lossless
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i128::from(0i16);
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//~^ cast_lossless
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i64::from(0i32);
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//~^ cast_lossless
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i128::from(0i32);
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//~^ cast_lossless
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i128::from(0i64);
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//~^ cast_lossless
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// Test with an expression wrapped in parens
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let _ = u16::from(1u8 + 1u8);
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//~^ cast_lossless
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let _ = I64Alias::from(1i8);
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//~^ cast_lossless
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let _: u16 = 0u8.into();
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//~^ cast_lossless
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let _: i16 = (-1i8).into();
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//~^ cast_lossless
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let _: u16 = (1u8 + 2).into();
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//~^ cast_lossless
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let _: u32 = (1i8 as u16).into();
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//~^ cast_lossless
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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: u16) -> u32 {
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input as u32
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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: u32) -> u64 {
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x as u64
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}
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}
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}
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#[derive(PartialEq, Debug)]
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#[repr(i64)]
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enum Test {
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A = u32::MAX as i64 + 1,
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}
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fn issue11458() {
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macro_rules! sign_cast {
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($var: ident, $src: ty, $dest: ty) => {
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<$dest>::from_ne_bytes(($var as $src).to_ne_bytes())
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};
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}
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let x = 10_u128;
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let _ = i32::from(sign_cast!(x, u8, i8));
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//~^ cast_lossless
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let _ = i32::from(sign_cast!(x, u8, i8) + 1);
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//~^ cast_lossless
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}
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fn issue12695() {
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macro_rules! in_macro {
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() => {
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u32::from(1u8)
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//~^ cast_lossless
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};
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}
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let _ = in_macro!();
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}
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fn ty_from_macro() {
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macro_rules! ty {
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() => {
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u32
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};
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}
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let _ = <ty!()>::from(0u8);
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}
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const IN_CONST: u64 = 0u8 as u64;
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