| #![allow(unused_imports, clippy::needless_return)] |
| #![warn(clippy::flat_map_identity)] |
| |
| use std::convert; |
| |
| fn main() { |
| let iterator = [[0, 1], [2, 3], [4, 5]].iter(); |
| let _ = iterator.flat_map(|x| x); |
| //~^ flat_map_identity |
| |
| let iterator = [[0, 1], [2, 3], [4, 5]].iter(); |
| let _ = iterator.flat_map(convert::identity); |
| //~^ flat_map_identity |
| |
| let iterator = [[0, 1], [2, 3], [4, 5]].iter(); |
| let _ = iterator.flat_map(|x| return x); |
| //~^ flat_map_identity |
| } |
| |
| fn issue15198() { |
| let x = [[1, 2], [3, 4]]; |
| // don't lint: this is an `Iterator<Item = &[i32, i32]>` |
| // match ergonomics makes the binding patterns into references |
| // so that its type changes to `Iterator<Item = [&i32, &i32]>` |
| let _ = x.iter().flat_map(|[x, y]| [x, y]); |
| let _ = x.iter().flat_map(|x| [x[0]]); |
| |
| // no match ergonomics for `[i32, i32]` |
| let _ = x.iter().copied().flat_map(|[x, y]| [x, y]); |
| //~^ flat_map_identity |
| } |
