rust-clippy/tests/ui/useless_conversion.stderr

error: useless conversion to the same type: `T`
  --> tests/ui/useless_conversion.rs:5:13
   |
LL |     let _ = T::from(val);
   |             ^^^^^^^^^^^^ help: consider removing `T::from()`: `val`
   |
note: the lint level is defined here
  --> tests/ui/useless_conversion.rs:1:9
   |
LL | #![deny(clippy::useless_conversion)]
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^

error: useless conversion to the same type: `T`
  --> tests/ui/useless_conversion.rs:6:5
   |
LL |     val.into()
   |     ^^^^^^^^^^ help: consider removing `.into()`: `val`

error: useless conversion to the same type: `i32`
  --> tests/ui/useless_conversion.rs:18:22
   |
LL |         let _: i32 = 0i32.into();
   |                      ^^^^^^^^^^^ help: consider removing `.into()`: `0i32`

error: useless conversion to the same type: `std::str::Lines<'_>`
  --> tests/ui/useless_conversion.rs:48:22
   |
LL |     if Some("ok") == lines.into_iter().next() {}
   |                      ^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `lines`

error: useless conversion to the same type: `std::str::Lines<'_>`
  --> tests/ui/useless_conversion.rs:53:21
   |
LL |     let mut lines = text.lines().into_iter();
   |                     ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `text.lines()`

error: useless conversion to the same type: `std::str::Lines<'_>`
  --> tests/ui/useless_conversion.rs:59:22
   |
LL |     if Some("ok") == text.lines().into_iter().next() {}
   |                      ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `text.lines()`

error: useless conversion to the same type: `std::ops::Range<i32>`
  --> tests/ui/useless_conversion.rs:65:13
   |
LL |     let _ = NUMBERS.into_iter().next();
   |             ^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `NUMBERS`

error: useless conversion to the same type: `std::ops::Range<i32>`
  --> tests/ui/useless_conversion.rs:70:17
   |
LL |     let mut n = NUMBERS.into_iter();
   |                 ^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `NUMBERS`

error: useless conversion to the same type: `std::string::String`
  --> tests/ui/useless_conversion.rs:132:21
   |
LL |     let _: String = "foo".to_string().into();
   |                     ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into()`: `"foo".to_string()`

error: useless conversion to the same type: `std::string::String`
  --> tests/ui/useless_conversion.rs:133:21
   |
LL |     let _: String = From::from("foo".to_string());
   |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `From::from()`: `"foo".to_string()`

error: useless conversion to the same type: `std::string::String`
  --> tests/ui/useless_conversion.rs:134:13
   |
LL |     let _ = String::from("foo".to_string());
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `"foo".to_string()`

error: useless conversion to the same type: `std::string::String`
  --> tests/ui/useless_conversion.rs:135:13
   |
LL |     let _ = String::from(format!("A: {:04}", 123));
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `format!("A: {:04}", 123)`

error: useless conversion to the same type: `std::str::Lines<'_>`
  --> tests/ui/useless_conversion.rs:136:13
   |
LL |     let _ = "".lines().into_iter();
   |             ^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `"".lines()`

error: useless conversion to the same type: `std::vec::IntoIter<i32>`
  --> tests/ui/useless_conversion.rs:137:13
   |
LL |     let _ = vec![1, 2, 3].into_iter().into_iter();
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `vec![1, 2, 3].into_iter()`

error: useless conversion to the same type: `std::string::String`
  --> tests/ui/useless_conversion.rs:138:21
   |
LL |     let _: String = format!("Hello {}", "world").into();
   |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into()`: `format!("Hello {}", "world")`

error: useless conversion to the same type: `i32`
  --> tests/ui/useless_conversion.rs:143:13
   |
LL |     let _ = i32::from(a + b) * 3;
   |             ^^^^^^^^^^^^^^^^ help: consider removing `i32::from()`: `(a + b)`

error: useless conversion to the same type: `Foo<'a'>`
  --> tests/ui/useless_conversion.rs:149:23
   |
LL |     let _: Foo<'a'> = s2.into();
   |                       ^^^^^^^^^ help: consider removing `.into()`: `s2`

error: useless conversion to the same type: `Foo<'a'>`
  --> tests/ui/useless_conversion.rs:151:13
   |
LL |     let _ = Foo::<'a'>::from(s3);
   |             ^^^^^^^^^^^^^^^^^^^^ help: consider removing `Foo::<'a'>::from()`: `s3`

error: useless conversion to the same type: `std::vec::IntoIter<Foo<'a'>>`
  --> tests/ui/useless_conversion.rs:153:13
   |
LL |     let _ = vec![s4, s4, s4].into_iter().into_iter();
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `vec![s4, s4, s4].into_iter()`

error: explicit call to `.into_iter()` in function argument accepting `IntoIterator`
  --> tests/ui/useless_conversion.rs:185:7
   |
LL |     b(vec![1, 2].into_iter());
   |       ^^^^^^^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()`: `vec![1, 2]`
   |
note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()`
  --> tests/ui/useless_conversion.rs:175:13
   |
LL |     fn b<T: IntoIterator<Item = i32>>(_: T) {}
   |             ^^^^^^^^^^^^^^^^^^^^^^^^

error: explicit call to `.into_iter()` in function argument accepting `IntoIterator`
  --> tests/ui/useless_conversion.rs:186:7
   |
LL |     c(vec![1, 2].into_iter());
   |       ^^^^^^^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()`: `vec![1, 2]`
   |
note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()`
  --> tests/ui/useless_conversion.rs:176:18
   |
LL |     fn c(_: impl IntoIterator<Item = i32>) {}
   |                  ^^^^^^^^^^^^^^^^^^^^^^^^

error: explicit call to `.into_iter()` in function argument accepting `IntoIterator`
  --> tests/ui/useless_conversion.rs:187:7
   |
LL |     d(vec![1, 2].into_iter());
   |       ^^^^^^^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()`: `vec![1, 2]`
   |
note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()`
  --> tests/ui/useless_conversion.rs:179:12
   |
LL |         T: IntoIterator<Item = i32>,
   |            ^^^^^^^^^^^^^^^^^^^^^^^^

error: explicit call to `.into_iter()` in function argument accepting `IntoIterator`
  --> tests/ui/useless_conversion.rs:190:7
   |
LL |     b(vec![1, 2].into_iter().into_iter());
   |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()`s: `vec![1, 2]`
   |
note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()`
  --> tests/ui/useless_conversion.rs:175:13
   |
LL |     fn b<T: IntoIterator<Item = i32>>(_: T) {}
   |             ^^^^^^^^^^^^^^^^^^^^^^^^

error: explicit call to `.into_iter()` in function argument accepting `IntoIterator`
  --> tests/ui/useless_conversion.rs:191:7
   |
LL |     b(vec![1, 2].into_iter().into_iter().into_iter());
   |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()`s: `vec![1, 2]`
   |
note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()`
  --> tests/ui/useless_conversion.rs:175:13
   |
LL |     fn b<T: IntoIterator<Item = i32>>(_: T) {}
   |             ^^^^^^^^^^^^^^^^^^^^^^^^

error: explicit call to `.into_iter()` in function argument accepting `IntoIterator`
  --> tests/ui/useless_conversion.rs:237:24
   |
LL |         foo2::<i32, _>([1, 2, 3].into_iter());
   |                        ^^^^^^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()`: `[1, 2, 3]`
   |
note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()`
  --> tests/ui/useless_conversion.rs:216:12
   |
LL |         I: IntoIterator<Item = i32> + Helper<X>,
   |            ^^^^^^^^^^^^^^^^^^^^^^^^

error: explicit call to `.into_iter()` in function argument accepting `IntoIterator`
  --> tests/ui/useless_conversion.rs:245:14
   |
LL |         foo3([1, 2, 3].into_iter());
   |              ^^^^^^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()`: `[1, 2, 3]`
   |
note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()`
  --> tests/ui/useless_conversion.rs:225:12
   |
LL |         I: IntoIterator<Item = i32>,
   |            ^^^^^^^^^^^^^^^^^^^^^^^^

error: explicit call to `.into_iter()` in function argument accepting `IntoIterator`
  --> tests/ui/useless_conversion.rs:254:16
   |
LL |         S1.foo([1, 2].into_iter());
   |                ^^^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()`: `[1, 2]`
   |
note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()`
  --> tests/ui/useless_conversion.rs:251:27
   |
LL |             pub fn foo<I: IntoIterator>(&self, _: I) {}
   |                           ^^^^^^^^^^^^

error: explicit call to `.into_iter()` in function argument accepting `IntoIterator`
  --> tests/ui/useless_conversion.rs:273:44
   |
LL |         v0.into_iter().interleave_shortest(v1.into_iter());
   |                                            ^^^^^^^^^^^^^^ help: consider removing the `.into_iter()`: `v1`
   |
note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()`
  --> tests/ui/useless_conversion.rs:260:20
   |
LL |                 J: IntoIterator,
   |                    ^^^^^^^^^^^^

error: aborting due to 28 previous errors