clippy_tests/examples/filter_methods.stderr

   1 error: called `filter(p).map(q)` on an `Iterator`. This is more succinctly expressed by calling `.filter_map(..)` instead.
   2   --> filter_methods.rs:8:21
   3    |
   4 8  |       let _: Vec<_> = vec![5; 6].into_iter()
   5    |  _____________________^
   6 9  | |                               .filter(|&x| x == 0)
   7 10 | |                               .map(|x| x * 2)
   8    | |_____________________________________________^
   9    |
  10    = note: `-D filter-map` implied by `-D warnings`
  11
  12 error: called `filter(p).flat_map(q)` on an `Iterator`. This is more succinctly expressed by calling `.flat_map(..)` and filtering by returning an empty Iterator.
  13   --> filter_methods.rs:13:21
  14    |
  15 13 |       let _: Vec<_> = vec![5_i8; 6].into_iter()
  16    |  _____________________^
  17 14 | |                                 .filter(|&x| x == 0)
  18 15 | |                                 .flat_map(|x| x.checked_mul(2))
  19    | |_______________________________________________________________^
  20    |
  21    = note: `-D filter-map` implied by `-D warnings`
  22
  23 error: called `filter_map(p).flat_map(q)` on an `Iterator`. This is more succinctly expressed by calling `.flat_map(..)` and filtering by returning an empty Iterator.
  24   --> filter_methods.rs:18:21
  25    |
  26 18 |       let _: Vec<_> = vec![5_i8; 6].into_iter()
  27    |  _____________________^
  28 19 | |                                 .filter_map(|x| x.checked_mul(2))
  29 20 | |                                 .flat_map(|x| x.checked_mul(2))
  30    | |_______________________________________________________________^
  31    |
  32    = note: `-D filter-map` implied by `-D warnings`
  33
  34 error: called `filter_map(p).map(q)` on an `Iterator`. This is more succinctly expressed by only calling `.filter_map(..)` instead.
  35   --> filter_methods.rs:23:21
  36    |
  37 23 |       let _: Vec<_> = vec![5_i8; 6].into_iter()
  38    |  _____________________^
  39 24 | |                                 .filter_map(|x| x.checked_mul(2))
  40 25 | |                                 .map(|x| x.checked_mul(2))
  41    | |__________________________________________________________^
  42    |
  43    = note: `-D filter-map` implied by `-D warnings`
  44
  45 error: aborting due to previous error(s)
  46
  47
  48 To learn more, run the command again with --verbose.