src/tools/clippy/tests/ui/manual_map_option.stderr

   1 error: manual implementation of `Option::map`
   2   --> $DIR/manual_map_option.rs:14:5
   3    |
   4 LL | /     match Some(0) {
   5 LL | |         Some(_) => Some(2),
   6 LL | |         None::<u32> => None,
   7 LL | |     };
   8    | |_____^ help: try this: `Some(0).map(|_| 2)`
   9    |
  10    = note: `-D clippy::manual-map` implied by `-D warnings`
  11
  12 error: manual implementation of `Option::map`
  13   --> $DIR/manual_map_option.rs:19:5
  14    |
  15 LL | /     match Some(0) {
  16 LL | |         Some(x) => Some(x + 1),
  17 LL | |         _ => None,
  18 LL | |     };
  19    | |_____^ help: try this: `Some(0).map(|x| x + 1)`
  20
  21 error: manual implementation of `Option::map`
  22   --> $DIR/manual_map_option.rs:24:5
  23    |
  24 LL | /     match Some("") {
  25 LL | |         Some(x) => Some(x.is_empty()),
  26 LL | |         None => None,
  27 LL | |     };
  28    | |_____^ help: try this: `Some("").map(|x| x.is_empty())`
  29
  30 error: manual implementation of `Option::map`
  31   --> $DIR/manual_map_option.rs:29:5
  32    |
  33 LL | /     if let Some(x) = Some(0) {
  34 LL | |         Some(!x)
  35 LL | |     } else {
  36 LL | |         None
  37 LL | |     };
  38    | |_____^ help: try this: `Some(0).map(|x| !x)`
  39
  40 error: manual implementation of `Option::map`
  41   --> $DIR/manual_map_option.rs:36:5
  42    |
  43 LL | /     match Some(0) {
  44 LL | |         Some(x) => { Some(std::convert::identity(x)) }
  45 LL | |         None => { None }
  46 LL | |     };
  47    | |_____^ help: try this: `Some(0).map(std::convert::identity)`
  48
  49 error: manual implementation of `Option::map`
  50   --> $DIR/manual_map_option.rs:41:5
  51    |
  52 LL | /     match Some(&String::new()) {
  53 LL | |         Some(x) => Some(str::len(x)),
  54 LL | |         None => None,
  55 LL | |     };
  56    | |_____^ help: try this: `Some(&String::new()).map(|x| str::len(x))`
  57
  58 error: manual implementation of `Option::map`
  59   --> $DIR/manual_map_option.rs:51:5
  60    |
  61 LL | /     match &Some([0, 1]) {
  62 LL | |         Some(x) => Some(x[0]),
  63 LL | |         &None => None,
  64 LL | |     };
  65    | |_____^ help: try this: `Some([0, 1]).as_ref().map(|x| x[0])`
  66
  67 error: manual implementation of `Option::map`
  68   --> $DIR/manual_map_option.rs:56:5
  69    |
  70 LL | /     match &Some(0) {
  71 LL | |         &Some(x) => Some(x * 2),
  72 LL | |         None => None,
  73 LL | |     };
  74    | |_____^ help: try this: `Some(0).map(|x| x * 2)`
  75
  76 error: manual implementation of `Option::map`
  77   --> $DIR/manual_map_option.rs:61:5
  78    |
  79 LL | /     match Some(String::new()) {
  80 LL | |         Some(ref x) => Some(x.is_empty()),
  81 LL | |         _ => None,
  82 LL | |     };
  83    | |_____^ help: try this: `Some(String::new()).as_ref().map(|x| x.is_empty())`
  84
  85 error: manual implementation of `Option::map`
  86   --> $DIR/manual_map_option.rs:66:5
  87    |
  88 LL | /     match &&Some(String::new()) {
  89 LL | |         Some(x) => Some(x.len()),
  90 LL | |         _ => None,
  91 LL | |     };
  92    | |_____^ help: try this: `Some(String::new()).as_ref().map(|x| x.len())`
  93
  94 error: manual implementation of `Option::map`
  95   --> $DIR/manual_map_option.rs:71:5
  96    |
  97 LL | /     match &&Some(0) {
  98 LL | |         &&Some(x) => Some(x + x),
  99 LL | |         &&_ => None,
 100 LL | |     };
 101    | |_____^ help: try this: `Some(0).map(|x| x + x)`
 102
 103 error: manual implementation of `Option::map`
 104   --> $DIR/manual_map_option.rs:84:9
 105    |
 106 LL | /         match &mut Some(String::new()) {
 107 LL | |             Some(x) => Some(x.push_str("")),
 108 LL | |             None => None,
 109 LL | |         };
 110    | |_________^ help: try this: `Some(String::new()).as_mut().map(|x| x.push_str(""))`
 111
 112 error: manual implementation of `Option::map`
 113   --> $DIR/manual_map_option.rs:90:5
 114    |
 115 LL | /     match &mut Some(String::new()) {
 116 LL | |         Some(ref x) => Some(x.len()),
 117 LL | |         None => None,
 118 LL | |     };
 119    | |_____^ help: try this: `Some(String::new()).as_ref().map(|x| x.len())`
 120
 121 error: manual implementation of `Option::map`
 122   --> $DIR/manual_map_option.rs:95:5
 123    |
 124 LL | /     match &mut &Some(String::new()) {
 125 LL | |         Some(x) => Some(x.is_empty()),
 126 LL | |         &mut _ => None,
 127 LL | |     };
 128    | |_____^ help: try this: `Some(String::new()).as_ref().map(|x| x.is_empty())`
 129
 130 error: manual implementation of `Option::map`
 131   --> $DIR/manual_map_option.rs:100:5
 132    |
 133 LL | /     match Some((0, 1, 2)) {
 134 LL | |         Some((x, y, z)) => Some(x + y + z),
 135 LL | |         None => None,
 136 LL | |     };
 137    | |_____^ help: try this: `Some((0, 1, 2)).map(|(x, y, z)| x + y + z)`
 138
 139 error: manual implementation of `Option::map`
 140   --> $DIR/manual_map_option.rs:105:5
 141    |
 142 LL | /     match Some([1, 2, 3]) {
 143 LL | |         Some([first, ..]) => Some(first),
 144 LL | |         None => None,
 145 LL | |     };
 146    | |_____^ help: try this: `Some([1, 2, 3]).map(|[first, ..]| first)`
 147
 148 error: manual implementation of `Option::map`
 149   --> $DIR/manual_map_option.rs:110:5
 150    |
 151 LL | /     match &Some((String::new(), "test")) {
 152 LL | |         Some((x, y)) => Some((y, x)),
 153 LL | |         None => None,
 154 LL | |     };
 155    | |_____^ help: try this: `Some((String::new(), "test")).as_ref().map(|(x, y)| (y, x))`
 156
 157 error: manual implementation of `Option::map`
 158   --> $DIR/manual_map_option.rs:168:5
 159    |
 160 LL | /     match Some(0) {
 161 LL | |         Some(x) => Some(vec![x]),
 162 LL | |         None => None,
 163 LL | |     };
 164    | |_____^ help: try this: `Some(0).map(|x| vec![x])`
 165
 166 error: manual implementation of `Option::map`
 167   --> $DIR/manual_map_option.rs:173:5
 168    |
 169 LL | /     match option_env!("") {
 170 LL | |         Some(x) => Some(String::from(x)),
 171 LL | |         None => None,
 172 LL | |     };
 173    | |_____^ help: try this: `option_env!("").map(String::from)`
 174
 175 error: aborting due to 19 previous errors
 176