rust-clippy/tests/ui/unnecessary_lazy_eval.stderr

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:83:13
   |
LL |     let _ = opt.unwrap_or_else(|| 2);
   |             ^^^^--------------------
   |                 |
   |                 help: use `unwrap_or(..)` instead: `unwrap_or(2)`
   |
   = note: `-D clippy::unnecessary-lazy-evaluations` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::unnecessary_lazy_evaluations)]`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:84:13
   |
LL |     let _ = opt.unwrap_or_else(|| astronomers_pi);
   |             ^^^^---------------------------------
   |                 |
   |                 help: use `unwrap_or(..)` instead: `unwrap_or(astronomers_pi)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:85:13
   |
LL |     let _ = opt.unwrap_or_else(|| ext_str.some_field);
   |             ^^^^-------------------------------------
   |                 |
   |                 help: use `unwrap_or(..)` instead: `unwrap_or(ext_str.some_field)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:87:13
   |
LL |     let _ = opt.and_then(|_| ext_opt);
   |             ^^^^---------------------
   |                 |
   |                 help: use `and(..)` instead: `and(ext_opt)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:88:13
   |
LL |     let _ = opt.or_else(|| ext_opt);
   |             ^^^^-------------------
   |                 |
   |                 help: use `or(..)` instead: `or(ext_opt)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:89:13
   |
LL |     let _ = opt.or_else(|| None);
   |             ^^^^----------------
   |                 |
   |                 help: use `or(..)` instead: `or(None)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:90:13
   |
LL |     let _ = opt.get_or_insert_with(|| 2);
   |             ^^^^------------------------
   |                 |
   |                 help: use `get_or_insert(..)` instead: `get_or_insert(2)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:91:13
   |
LL |     let _ = opt.ok_or_else(|| 2);
   |             ^^^^----------------
   |                 |
   |                 help: use `ok_or(..)` instead: `ok_or(2)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:92:13
   |
LL |     let _ = nested_tuple_opt.unwrap_or_else(|| Some((1, 2)));
   |             ^^^^^^^^^^^^^^^^^-------------------------------
   |                              |
   |                              help: use `unwrap_or(..)` instead: `unwrap_or(Some((1, 2)))`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:93:13
   |
LL |     let _ = cond.then(|| astronomers_pi);
   |             ^^^^^-----------------------
   |                  |
   |                  help: use `then_some(..)` instead: `then_some(astronomers_pi)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:94:13
   |
LL |     let _ = true.then(|| -> _ {});
   |             ^^^^^----------------
   |                  |
   |                  help: use `then_some(..)` instead: `then_some({})`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:95:13
   |
LL |     let _ = true.then(|| {});
   |             ^^^^^-----------
   |                  |
   |                  help: use `then_some(..)` instead: `then_some({})`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:99:13
   |
LL |     let _ = Some(1).unwrap_or_else(|| *r);
   |             ^^^^^^^^---------------------
   |                     |
   |                     help: use `unwrap_or(..)` instead: `unwrap_or(*r)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:101:13
   |
LL |     let _ = Some(1).unwrap_or_else(|| *b);
   |             ^^^^^^^^---------------------
   |                     |
   |                     help: use `unwrap_or(..)` instead: `unwrap_or(*b)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:103:13
   |
LL |     let _ = Some(1).as_ref().unwrap_or_else(|| &r);
   |             ^^^^^^^^^^^^^^^^^---------------------
   |                              |
   |                              help: use `unwrap_or(..)` instead: `unwrap_or(&r)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:104:13
   |
LL |     let _ = Some(1).as_ref().unwrap_or_else(|| &b);
   |             ^^^^^^^^^^^^^^^^^---------------------
   |                              |
   |                              help: use `unwrap_or(..)` instead: `unwrap_or(&b)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:107:13
   |
LL |     let _ = Some(10).unwrap_or_else(|| 2);
   |             ^^^^^^^^^--------------------
   |                      |
   |                      help: use `unwrap_or(..)` instead: `unwrap_or(2)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:108:13
   |
LL |     let _ = Some(10).and_then(|_| ext_opt);
   |             ^^^^^^^^^---------------------
   |                      |
   |                      help: use `and(..)` instead: `and(ext_opt)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:109:28
   |
LL |     let _: Option<usize> = None.or_else(|| ext_opt);
   |                            ^^^^^-------------------
   |                                 |
   |                                 help: use `or(..)` instead: `or(ext_opt)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:110:13
   |
LL |     let _ = None.get_or_insert_with(|| 2);
   |             ^^^^^------------------------
   |                  |
   |                  help: use `get_or_insert(..)` instead: `get_or_insert(2)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:111:35
   |
LL |     let _: Result<usize, usize> = None.ok_or_else(|| 2);
   |                                   ^^^^^----------------
   |                                        |
   |                                        help: use `ok_or(..)` instead: `ok_or(2)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:112:28
   |
LL |     let _: Option<usize> = None.or_else(|| None);
   |                            ^^^^^----------------
   |                                 |
   |                                 help: use `or(..)` instead: `or(None)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:115:13
   |
LL |     let _ = deep.0.unwrap_or_else(|| 2);
   |             ^^^^^^^--------------------
   |                    |
   |                    help: use `unwrap_or(..)` instead: `unwrap_or(2)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:116:13
   |
LL |     let _ = deep.0.and_then(|_| ext_opt);
   |             ^^^^^^^---------------------
   |                    |
   |                    help: use `and(..)` instead: `and(ext_opt)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:117:13
   |
LL |     let _ = deep.0.or_else(|| None);
   |             ^^^^^^^----------------
   |                    |
   |                    help: use `or(..)` instead: `or(None)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:118:13
   |
LL |     let _ = deep.0.get_or_insert_with(|| 2);
   |             ^^^^^^^------------------------
   |                    |
   |                    help: use `get_or_insert(..)` instead: `get_or_insert(2)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:119:13
   |
LL |     let _ = deep.0.ok_or_else(|| 2);
   |             ^^^^^^^----------------
   |                    |
   |                    help: use `ok_or(..)` instead: `ok_or(2)`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:150:28
   |
LL |     let _: Option<usize> = None.or_else(|| Some(3));
   |                            ^^^^^-------------------
   |                                 |
   |                                 help: use `or(..)` instead: `or(Some(3))`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:151:13
   |
LL |     let _ = deep.0.or_else(|| Some(3));
   |             ^^^^^^^-------------------
   |                    |
   |                    help: use `or(..)` instead: `or(Some(3))`

error: unnecessary closure used to substitute value for `Option::None`
  --> $DIR/unnecessary_lazy_eval.rs:152:13
   |
LL |     let _ = opt.or_else(|| Some(3));
   |             ^^^^-------------------
   |                 |
   |                 help: use `or(..)` instead: `or(Some(3))`

error: unnecessary closure used to substitute value for `Result::Err`
  --> $DIR/unnecessary_lazy_eval.rs:158:13
   |
LL |     let _ = res2.unwrap_or_else(|_| 2);
   |             ^^^^^---------------------
   |                  |
   |                  help: use `unwrap_or(..)` instead: `unwrap_or(2)`

error: unnecessary closure used to substitute value for `Result::Err`
  --> $DIR/unnecessary_lazy_eval.rs:159:13
   |
LL |     let _ = res2.unwrap_or_else(|_| astronomers_pi);
   |             ^^^^^----------------------------------
   |                  |
   |                  help: use `unwrap_or(..)` instead: `unwrap_or(astronomers_pi)`

error: unnecessary closure used to substitute value for `Result::Err`
  --> $DIR/unnecessary_lazy_eval.rs:160:13
   |
LL |     let _ = res2.unwrap_or_else(|_| ext_str.some_field);
   |             ^^^^^--------------------------------------
   |                  |
   |                  help: use `unwrap_or(..)` instead: `unwrap_or(ext_str.some_field)`

error: unnecessary closure used to substitute value for `Result::Err`
  --> $DIR/unnecessary_lazy_eval.rs:182:35
   |
LL |     let _: Result<usize, usize> = res.and_then(|_| Err(2));
   |                                   ^^^^--------------------
   |                                       |
   |                                       help: use `and(..)` instead: `and(Err(2))`

error: unnecessary closure used to substitute value for `Result::Err`
  --> $DIR/unnecessary_lazy_eval.rs:183:35
   |
LL |     let _: Result<usize, usize> = res.and_then(|_| Err(astronomers_pi));
   |                                   ^^^^---------------------------------
   |                                       |
   |                                       help: use `and(..)` instead: `and(Err(astronomers_pi))`

error: unnecessary closure used to substitute value for `Result::Err`
  --> $DIR/unnecessary_lazy_eval.rs:184:35
   |
LL |     let _: Result<usize, usize> = res.and_then(|_| Err(ext_str.some_field));
   |                                   ^^^^-------------------------------------
   |                                       |
   |                                       help: use `and(..)` instead: `and(Err(ext_str.some_field))`

error: unnecessary closure used to substitute value for `Result::Err`
  --> $DIR/unnecessary_lazy_eval.rs:186:35
   |
LL |     let _: Result<usize, usize> = res.or_else(|_| Ok(2));
   |                                   ^^^^------------------
   |                                       |
   |                                       help: use `or(..)` instead: `or(Ok(2))`

error: unnecessary closure used to substitute value for `Result::Err`
  --> $DIR/unnecessary_lazy_eval.rs:187:35
   |
LL |     let _: Result<usize, usize> = res.or_else(|_| Ok(astronomers_pi));
   |                                   ^^^^-------------------------------
   |                                       |
   |                                       help: use `or(..)` instead: `or(Ok(astronomers_pi))`

error: unnecessary closure used to substitute value for `Result::Err`
  --> $DIR/unnecessary_lazy_eval.rs:188:35
   |
LL |     let _: Result<usize, usize> = res.or_else(|_| Ok(ext_str.some_field));
   |                                   ^^^^-----------------------------------
   |                                       |
   |                                       help: use `or(..)` instead: `or(Ok(ext_str.some_field))`

error: unnecessary closure used to substitute value for `Result::Err`
  --> $DIR/unnecessary_lazy_eval.rs:189:35
   |
LL |       let _: Result<usize, usize> = res.
   |  ___________________________________^
LL | |     // some lines
LL | |     // some lines
LL | |     // some lines
...  |
LL | |     // some lines
LL | |     or_else(|_| Ok(ext_str.some_field));
   | |_____----------------------------------^
   |       |
   |       help: use `or(..)` instead: `or(Ok(ext_str.some_field))`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:219:14
   |
LL |     let _x = false.then(|| i32::MAX + 1);
   |              ^^^^^^---------------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(i32::MAX + 1)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:221:14
   |
LL |     let _x = false.then(|| i32::MAX * 2);
   |              ^^^^^^---------------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(i32::MAX * 2)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:223:14
   |
LL |     let _x = false.then(|| i32::MAX - 1);
   |              ^^^^^^---------------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(i32::MAX - 1)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:225:14
   |
LL |     let _x = false.then(|| i32::MIN - 1);
   |              ^^^^^^---------------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(i32::MIN - 1)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:227:14
   |
LL |     let _x = false.then(|| (1 + 2 * 3 - 2 / 3 + 9) << 2);
   |              ^^^^^^-------------------------------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some((1 + 2 * 3 - 2 / 3 + 9) << 2)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:229:14
   |
LL |     let _x = false.then(|| 255u8 << 7);
   |              ^^^^^^-------------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(255u8 << 7)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:231:14
   |
LL |     let _x = false.then(|| 255u8 << 8);
   |              ^^^^^^-------------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(255u8 << 8)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:233:14
   |
LL |     let _x = false.then(|| 255u8 >> 8);
   |              ^^^^^^-------------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(255u8 >> 8)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:236:14
   |
LL |     let _x = false.then(|| i32::MAX + -1);
   |              ^^^^^^----------------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(i32::MAX + -1)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:238:14
   |
LL |     let _x = false.then(|| -i32::MAX);
   |              ^^^^^^------------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(-i32::MAX)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:240:14
   |
LL |     let _x = false.then(|| -i32::MIN);
   |              ^^^^^^------------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(-i32::MIN)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:243:14
   |
LL |     let _x = false.then(|| 255 >> -7);
   |              ^^^^^^------------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(255 >> -7)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:245:14
   |
LL |     let _x = false.then(|| 255 << -1);
   |              ^^^^^^------------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(255 << -1)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:247:14
   |
LL |     let _x = false.then(|| 1 / 0);
   |              ^^^^^^--------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(1 / 0)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:249:14
   |
LL |     let _x = false.then(|| x << -1);
   |              ^^^^^^----------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(x << -1)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:251:14
   |
LL |     let _x = false.then(|| x << 2);
   |              ^^^^^^---------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(x << 2)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:261:14
   |
LL |     let _x = false.then(|| x / 0);
   |              ^^^^^^--------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(x / 0)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:263:14
   |
LL |     let _x = false.then(|| x % 0);
   |              ^^^^^^--------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(x % 0)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:266:14
   |
LL |     let _x = false.then(|| 1 / -1);
   |              ^^^^^^---------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(1 / -1)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:268:14
   |
LL |     let _x = false.then(|| i32::MIN / -1);
   |              ^^^^^^----------------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(i32::MIN / -1)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:271:14
   |
LL |     let _x = false.then(|| i32::MIN / 0);
   |              ^^^^^^---------------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(i32::MIN / 0)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:273:14
   |
LL |     let _x = false.then(|| 4 / 2);
   |              ^^^^^^--------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(4 / 2)`

error: unnecessary closure used with `bool::then`
  --> $DIR/unnecessary_lazy_eval.rs:281:14
   |
LL |     let _x = false.then(|| f1 + f2);
   |              ^^^^^^----------------
   |                    |
   |                    help: use `then_some(..)` instead: `then_some(f1 + f2)`

error: aborting due to 63 previous errors