73 lines
1.5 KiB
Rust
73 lines
1.5 KiB
Rust
#![warn(clippy::for_loops_over_fallibles)]
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fn for_loops_over_fallibles() {
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let option = Some(1);
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let mut result = option.ok_or("x not found");
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let v = vec![0, 1, 2];
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// check over an `Option`
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for x in option {
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println!("{}", x);
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}
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// check over an `Option`
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for x in option.iter() {
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println!("{}", x);
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}
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// check over a `Result`
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for x in result {
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println!("{}", x);
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}
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// check over a `Result`
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for x in result.iter_mut() {
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println!("{}", x);
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}
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// check over a `Result`
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for x in result.into_iter() {
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println!("{}", x);
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}
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for x in option.ok_or("x not found") {
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println!("{}", x);
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}
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// make sure LOOP_OVER_NEXT lint takes clippy::precedence when next() is the last call
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// in the chain
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for x in v.iter().next() {
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println!("{}", x);
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}
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// make sure we lint when next() is not the last call in the chain
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for x in v.iter().next().and(Some(0)) {
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println!("{}", x);
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}
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for x in v.iter().next().ok_or("x not found") {
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println!("{}", x);
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}
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// check for false positives
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// for loop false positive
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for x in v {
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println!("{}", x);
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}
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// while let false positive for Option
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while let Some(x) = option {
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println!("{}", x);
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break;
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}
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// while let false positive for Result
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while let Ok(x) = result {
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println!("{}", x);
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break;
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}
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}
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fn main() {}
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