63 lines
1.4 KiB
Rust
63 lines
1.4 KiB
Rust
#![warn(clippy::manual_option_as_slice)]
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#![allow(clippy::redundant_closure, clippy::unwrap_or_default)]
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fn check(x: Option<u32>) {
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_ = x.as_slice();
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_ = x.as_slice();
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_ = x.as_slice();
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//~^ manual_option_as_slice
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_ = x.as_slice();
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//~^ manual_option_as_slice
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_ = x.as_slice();
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//~^ manual_option_as_slice
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_ = x.as_slice();
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//~^ manual_option_as_slice
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{
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use std::slice::from_ref;
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_ = x.as_slice();
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//~^ manual_option_as_slice
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}
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// possible false positives
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let y = x.as_ref();
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_ = match y {
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// as_ref outside
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Some(f) => &[f][..],
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None => &[][..],
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};
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_ = match x.as_ref() {
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Some(f) => std::slice::from_ref(f),
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None => &[0],
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};
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_ = match x.as_ref() {
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Some(42) => &[23],
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Some(f) => std::slice::from_ref(f),
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None => &[],
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};
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let b = &[42];
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_ = if let Some(_f) = x.as_ref() {
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std::slice::from_ref(b)
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} else {
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&[]
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};
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_ = x.as_ref().map_or(&[42][..], std::slice::from_ref);
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_ = x.as_ref().map_or_else(|| &[42][..1], std::slice::from_ref);
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_ = x.as_ref().map(|f| std::slice::from_ref(f)).unwrap_or_default();
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}
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#[clippy::msrv = "1.74"]
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fn check_msrv(x: Option<u32>) {
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_ = x.as_ref().map_or(&[][..], std::slice::from_ref);
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}
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fn main() {
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check(Some(1));
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check_msrv(Some(175));
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}
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