55 lines
1.2 KiB
Rust
55 lines
1.2 KiB
Rust
#![allow(dead_code)]
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#![warn(clippy::cast_lossless)]
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type U8 = u8;
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fn main() {
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// Test clippy::cast_lossless with casts to integer types
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let _ = u8::from(true);
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let _ = u16::from(true);
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let _ = u32::from(true);
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let _ = u64::from(true);
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let _ = u128::from(true);
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let _ = usize::from(true);
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let _ = i8::from(true);
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let _ = i16::from(true);
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let _ = i32::from(true);
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let _ = i64::from(true);
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let _ = i128::from(true);
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let _ = isize::from(true);
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// Test with an expression wrapped in parens
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let _ = u16::from(true | false);
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let _ = U8::from(true);
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}
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// The lint would suggest using `u32::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: bool) -> 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: bool) -> u64 {
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x as u64
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}
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}
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}
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#[clippy::msrv = "1.27"]
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fn msrv_1_27() {
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let _ = true as u8;
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}
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#[clippy::msrv = "1.28"]
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fn msrv_1_28() {
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let _ = u8::from(true);
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}
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