src/tools/clippy/tests/ui/search_is_some_fixable.rs

   1 // run-rustfix
   2 #![allow(dead_code)]
   3 #![warn(clippy::search_is_some)]
   4
   5 fn main() {
   6     let v = vec![3, 2, 1, 0, -1, -2, -3];
   7     let y = &&42;
   8
   9     // Check `find().is_some()`, single-line case.
  10     let _ = v.iter().find(|&x| *x < 0).is_some();
  11     let _ = (0..1).find(|x| **y == *x).is_some(); // one dereference less
  12     let _ = (0..1).find(|x| *x == 0).is_some();
  13     let _ = v.iter().find(|x| **x == 0).is_some();
  14
  15     // Check `position().is_some()`, single-line case.
  16     let _ = v.iter().position(|&x| x < 0).is_some();
  17
  18     // Check `rposition().is_some()`, single-line case.
  19     let _ = v.iter().rposition(|&x| x < 0).is_some();
  20
  21     let s1 = String::from("hello world");
  22     let s2 = String::from("world");
  23     // caller of `find()` is a `&`static str`
  24     let _ = "hello world".find("world").is_some();
  25     let _ = "hello world".find(&s2).is_some();
  26     let _ = "hello world".find(&s2[2..]).is_some();
  27     // caller of `find()` is a `String`
  28     let _ = s1.find("world").is_some();
  29     let _ = s1.find(&s2).is_some();
  30     let _ = s1.find(&s2[2..]).is_some();
  31     // caller of `find()` is slice of `String`
  32     let _ = s1[2..].find("world").is_some();
  33     let _ = s1[2..].find(&s2).is_some();
  34     let _ = s1[2..].find(&s2[2..]).is_some();
  35 }
  36
  37 fn is_none() {
  38     let v = vec![3, 2, 1, 0, -1, -2, -3];
  39     let y = &&42;
  40
  41     // Check `find().is_none()`, single-line case.
  42     let _ = v.iter().find(|&x| *x < 0).is_none();
  43     let _ = (0..1).find(|x| **y == *x).is_none(); // one dereference less
  44     let _ = (0..1).find(|x| *x == 0).is_none();
  45     let _ = v.iter().find(|x| **x == 0).is_none();
  46
  47     // Check `position().is_none()`, single-line case.
  48     let _ = v.iter().position(|&x| x < 0).is_none();
  49
  50     // Check `rposition().is_none()`, single-line case.
  51     let _ = v.iter().rposition(|&x| x < 0).is_none();
  52
  53     let s1 = String::from("hello world");
  54     let s2 = String::from("world");
  55
  56     // caller of `find()` is a `&`static str`
  57     let _ = "hello world".find("world").is_none();
  58     let _ = "hello world".find(&s2).is_none();
  59     let _ = "hello world".find(&s2[2..]).is_none();
  60     // caller of `find()` is a `String`
  61     let _ = s1.find("world").is_none();
  62     let _ = s1.find(&s2).is_none();
  63     let _ = s1.find(&s2[2..]).is_none();
  64     // caller of `find()` is slice of `String`
  65     let _ = s1[2..].find("world").is_none();
  66     let _ = s1[2..].find(&s2).is_none();
  67     let _ = s1[2..].find(&s2[2..]).is_none();
  68 }