mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-16 17:58:14 +00:00
9500974bdb
* Captures by sub closures are now considered * Copy types are correctly borrowed by reference when their value is used * Fields are no longer automatically borrowed by value * Bindings in `match` and `let` patterns are now checked to determine how a local is captured
50 lines
1.4 KiB
Rust
50 lines
1.4 KiB
Rust
// run-rustfix
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#![warn(clippy::manual_map)]
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#![allow(clippy::toplevel_ref_arg)]
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fn main() {
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// Lint. `y` is declared within the arm, so it isn't captured by the map closure
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let _ = Some(0).map(|x| {
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let y = (String::new(), String::new());
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(x, y.0)
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});
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// Don't lint. `s` is borrowed until partway through the arm, but needs to be captured by the map
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// closure
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let s = Some(String::new());
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let _ = match &s {
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Some(x) => Some((x.clone(), s)),
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None => None,
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};
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// Don't lint. `s` is borrowed until partway through the arm, but needs to be captured by the map
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// closure
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let s = Some(String::new());
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let _ = match &s {
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Some(x) => Some({
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let clone = x.clone();
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let s = || s;
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(clone, s())
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}),
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None => None,
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};
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// Don't lint. `s` is borrowed until partway through the arm, but needs to be captured as a mutable
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// reference by the map closure
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let mut s = Some(String::new());
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let _ = match &s {
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Some(x) => Some({
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let clone = x.clone();
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let ref mut s = s;
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(clone, s)
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}),
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None => None,
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};
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// Lint. `s` is captured by reference, so no lifetime issues.
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let s = Some(String::new());
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let _ = s.as_ref().map(|x| {
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if let Some(ref s) = s { (x.clone(), s) } else { panic!() }
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});
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}
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