84 lines
1.6 KiB
Rust
84 lines
1.6 KiB
Rust
// run-rustfix
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#![allow(dead_code)]
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fn unwrap_or() {
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// int case
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match Some(1) {
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Some(i) => i,
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None => 42,
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};
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// int case reversed
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match Some(1) {
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None => 42,
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Some(i) => i,
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};
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// richer none expr
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match Some(1) {
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Some(i) => i,
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None => 1 + 42,
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};
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// multiline case
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#[rustfmt::skip]
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match Some(1) {
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Some(i) => i,
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None => {
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42 + 42
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+ 42 + 42 + 42
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+ 42 + 42 + 42
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}
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};
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// string case
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match Some("Bob") {
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Some(i) => i,
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None => "Alice",
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};
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// don't lint
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match Some(1) {
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Some(i) => i + 2,
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None => 42,
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};
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match Some(1) {
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Some(i) => i,
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None => return,
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};
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for j in 0..4 {
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match Some(j) {
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Some(i) => i,
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None => continue,
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};
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match Some(j) {
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Some(i) => i,
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None => break,
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};
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}
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// cases where the none arm isn't a constant expression
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// are not linted due to potential ownership issues
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// ownership issue example, don't lint
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struct NonCopyable;
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let mut option: Option<NonCopyable> = None;
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match option {
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Some(x) => x,
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None => {
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option = Some(NonCopyable);
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// some more code ...
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option.unwrap()
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},
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};
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// ownership issue example, don't lint
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let option: Option<&str> = None;
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match option {
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Some(s) => s,
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None => &format!("{} {}!", "hello", "world"),
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};
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}
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fn main() {}
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