64 lines
1.5 KiB
Rust
64 lines
1.5 KiB
Rust
#![warn(clippy::manual_flatten)]
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fn main() {
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// Test for loop over implicitly adjusted `Iterator` with `if let` expression
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let x = vec![Some(1), Some(2), Some(3)];
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for n in x {
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if let Some(n) = n {
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println!("{}", n);
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}
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}
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// Test for loop over implicitly implicitly adjusted `Iterator` with `if let` statement
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let y: Vec<Result<i32, i32>> = vec![];
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for n in y.clone() {
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if let Ok(n) = n {
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println!("{}", n);
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};
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}
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// Test for loop over by reference
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for n in &y {
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if let Ok(n) = n {
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println!("{}", n);
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}
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}
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// Test for loop over `Iterator` with `if let` expression
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let z = vec![Some(1), Some(2), Some(3)];
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let z = z.iter();
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for n in z {
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if let Some(n) = n {
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println!("{}", n);
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}
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}
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// Using the `None` variant should not trigger the lint
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let z = vec![Some(1), Some(2), Some(3)];
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for n in z {
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if n.is_none() {
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println!("Nada.");
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}
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}
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// Using the `Err` variant should not trigger the lint
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for n in y.clone() {
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if let Err(e) = n {
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println!("Oops: {}!", e);
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}
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}
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// Having an else clause should not trigger the lint
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for n in y.clone() {
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if let Ok(n) = n {
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println!("{}", n);
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} else {
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println!("Oops!");
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}
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}
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// Using manual flatten should not trigger the lint
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for n in vec![Some(1), Some(2), Some(3)].iter().flatten() {
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println!("{}", n);
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}
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}
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