rust-clippy/tests/ui/map_flatten.stderr

error: called `map(..).flatten()` on an `Iterator`. This is more succinctly expressed by calling `.flat_map(..)`
  --> $DIR/map_flatten.rs:16:21
   |
16 |     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)`
   |
   = note: `-D clippy::map-flatten` implied by `-D warnings`

error: aborting due to previous error
Lint for chaining flatten after map This change adds a lint to check for instances of `map(..).flatten()` that can be trivially shortened to `flat_map(..)` Closes #3196 2018-09-21 07:26:38 +00:00			error: called `map(..).flatten()` on an `Iterator`. This is more succinctly expressed by calling `.flat_map(..)`
Add license header to Rust files 2018-10-06 16:18:06 +00:00			`--> $DIR/map_flatten.rs:16:21`
			`\|`
			`16 \| 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)`
			`\|`
			= note: `-D clippy::map-flatten` implied by `-D warnings`
Lint for chaining flatten after map This change adds a lint to check for instances of `map(..).flatten()` that can be trivially shortened to `flat_map(..)` Closes #3196 2018-09-21 07:26:38 +00:00
			`error: aborting due to previous error`