rust-clippy/tests/ui/map_flatten.stderr
2020-01-07 18:38:12 +09:00

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error: called `map(..).flatten()` on an `Iterator`. This is more succinctly expressed by calling `.flat_map(..)`
--> $DIR/map_flatten.rs:7:21
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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: `vec![5_i8; 6].into_iter().flat_map(|x| 0..x)`
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= note: `-D clippy::map-flatten` implied by `-D warnings`
error: aborting due to previous error