rust-clippy/tests/ui/map_flatten.stderr
2021-09-09 17:10:59 -05:00

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error: called `map(..).flatten()` on an `Iterator`
--> $DIR/map_flatten.rs:18:46
|
LL | let _: Vec<_> = vec![5_i8; 6].into_iter().map(option_id).flatten().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using `filter_map` instead: `.filter_map(option_id)`
|
= note: `-D clippy::map-flatten` implied by `-D warnings`
error: called `map(..).flatten()` on an `Iterator`
--> $DIR/map_flatten.rs:19:46
|
LL | let _: Vec<_> = vec![5_i8; 6].into_iter().map(option_id_ref).flatten().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using `filter_map` instead: `.filter_map(option_id_ref)`
error: called `map(..).flatten()` on an `Iterator`
--> $DIR/map_flatten.rs:20:46
|
LL | let _: Vec<_> = vec![5_i8; 6].into_iter().map(option_id_closure).flatten().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using `filter_map` instead: `.filter_map(option_id_closure)`
error: called `map(..).flatten()` on an `Iterator`
--> $DIR/map_flatten.rs:21:46
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LL | let _: Vec<_> = vec![5_i8; 6].into_iter().map(|x| x.checked_add(1)).flatten().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try using `filter_map` instead: `.filter_map(|x| x.checked_add(1))`
error: called `map(..).flatten()` on an `Iterator`
--> $DIR/map_flatten.rs:24:46
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LL | let _: Vec<_> = vec![5_i8; 6].into_iter().map(|x| 0..x).flatten().collect();
| ^^^^^^^^^^^^^^^^^^^^^^^^ help: try using `flat_map` instead: `.flat_map(|x| 0..x)`
error: called `map(..).flatten()` on an `Option`
--> $DIR/map_flatten.rs:27:39
|
LL | let _: Option<_> = (Some(Some(1))).map(|x| x).flatten();
| ^^^^^^^^^^^^^^^^^^^^^ help: try using `and_then` instead: `.and_then(|x| x)`
error: called `map(..).flatten()` on an `Result`
--> $DIR/map_flatten.rs:30:41
|
LL | let _: Result<_, &str> = (Ok(Ok(1))).map(|x| x).flatten();
| ^^^^^^^^^^^^^^^^^^^^^ help: try using `and_then` instead: `.and_then(|x| x)`
error: aborting due to 7 previous errors