error: this `.filter_map` can be written more simply using `.filter`
  --> $DIR/unnecessary_filter_map.rs:4:13
   |
LL |     let _ = (0..4).filter_map(|x| if x > 1 { Some(x) } else { None });
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::unnecessary-filter-map` implied by `-D warnings`

error: this `.filter_map` can be written more simply using `.filter`
  --> $DIR/unnecessary_filter_map.rs:5:13
   |
LL |       let _ = (0..4).filter_map(|x| {
   |  _____________^
LL | |         if x > 1 {
LL | |             return Some(x);
LL | |         };
LL | |         None
LL | |     });
   | |______^

error: this `.filter_map` can be written more simply using `.filter`
  --> $DIR/unnecessary_filter_map.rs:11:13
   |
LL |       let _ = (0..4).filter_map(|x| match x {
   |  _____________^
LL | |         0 | 1 => None,
LL | |         _ => Some(x),
LL | |     });
   | |______^

error: this `.filter_map` can be written more simply using `.map`
  --> $DIR/unnecessary_filter_map.rs:16:13
   |
LL |     let _ = (0..4).filter_map(|x| Some(x + 1));
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 4 previous errors