error: useless conversion to the same type: `T` --> tests/ui/useless_conversion.rs:9:13 | 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:10:5 | LL | val.into() | ^^^^^^^^^^ help: consider removing `.into()`: `val` error: useless conversion to the same type: `i32` --> tests/ui/useless_conversion.rs:22:22 | 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:52:22 | 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:57:21 | 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:63:22 | 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` --> tests/ui/useless_conversion.rs:69:13 | LL | let _ = NUMBERS.into_iter().next(); | ^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `NUMBERS` error: useless conversion to the same type: `std::ops::Range` --> tests/ui/useless_conversion.rs:74:17 | 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:136:21 | 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:137:21 | 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:138:13 | 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:139:13 | 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:140:13 | LL | let _ = "".lines().into_iter(); | ^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `"".lines()` error: useless conversion to the same type: `std::vec::IntoIter` --> tests/ui/useless_conversion.rs:141:13 | 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:142:21 | 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:147:13 | 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:153:23 | 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:155:13 | LL | let _ = Foo::<'a'>::from(s3); | ^^^^^^^^^^^^^^^^^^^^ help: consider removing `Foo::<'a'>::from()`: `s3` error: useless conversion to the same type: `std::vec::IntoIter>` --> tests/ui/useless_conversion.rs:157:13 | 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:189:7 | LL | b(vec![1, 2].into_iter()); | ^^^^^^^^^^------------ | | | help: consider removing the `.into_iter()` | note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()` --> tests/ui/useless_conversion.rs:179:13 | LL | fn b>(_: T) {} | ^^^^^^^^^^^^^^^^^^^^^^^^ error: explicit call to `.into_iter()` in function argument accepting `IntoIterator` --> tests/ui/useless_conversion.rs:190:7 | LL | c(vec![1, 2].into_iter()); | ^^^^^^^^^^------------ | | | help: consider removing the `.into_iter()` | note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()` --> tests/ui/useless_conversion.rs:180:18 | LL | fn c(_: impl IntoIterator) {} | ^^^^^^^^^^^^^^^^^^^^^^^^ error: explicit call to `.into_iter()` in function argument accepting `IntoIterator` --> tests/ui/useless_conversion.rs:191:7 | LL | d(vec![1, 2].into_iter()); | ^^^^^^^^^^------------ | | | help: consider removing the `.into_iter()` | note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()` --> tests/ui/useless_conversion.rs:183:12 | LL | T: IntoIterator, | ^^^^^^^^^^^^^^^^^^^^^^^^ error: explicit call to `.into_iter()` in function argument accepting `IntoIterator` --> tests/ui/useless_conversion.rs:194:7 | LL | b(vec![1, 2].into_iter().into_iter()); | ^^^^^^^^^^------------------------ | | | help: consider removing the `.into_iter()`s | note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()` --> tests/ui/useless_conversion.rs:179:13 | LL | fn b>(_: T) {} | ^^^^^^^^^^^^^^^^^^^^^^^^ error: explicit call to `.into_iter()` in function argument accepting `IntoIterator` --> tests/ui/useless_conversion.rs:195:7 | LL | b(vec![1, 2].into_iter().into_iter().into_iter()); | ^^^^^^^^^^------------------------------------ | | | help: consider removing the `.into_iter()`s | note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()` --> tests/ui/useless_conversion.rs:179:13 | LL | fn b>(_: T) {} | ^^^^^^^^^^^^^^^^^^^^^^^^ error: explicit call to `.into_iter()` in function argument accepting `IntoIterator` --> tests/ui/useless_conversion.rs:241:24 | LL | foo2::([1, 2, 3].into_iter()); | ^^^^^^^^^------------ | | | help: consider removing the `.into_iter()` | note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()` --> tests/ui/useless_conversion.rs:220:12 | LL | I: IntoIterator + Helper, | ^^^^^^^^^^^^^^^^^^^^^^^^ error: explicit call to `.into_iter()` in function argument accepting `IntoIterator` --> tests/ui/useless_conversion.rs:249:14 | LL | foo3([1, 2, 3].into_iter()); | ^^^^^^^^^------------ | | | help: consider removing the `.into_iter()` | note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()` --> tests/ui/useless_conversion.rs:229:12 | LL | I: IntoIterator, | ^^^^^^^^^^^^^^^^^^^^^^^^ error: explicit call to `.into_iter()` in function argument accepting `IntoIterator` --> tests/ui/useless_conversion.rs:258:16 | LL | S1.foo([1, 2].into_iter()); | ^^^^^^------------ | | | help: consider removing the `.into_iter()` | note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()` --> tests/ui/useless_conversion.rs:255:27 | LL | pub fn foo(&self, _: I) {} | ^^^^^^^^^^^^ error: explicit call to `.into_iter()` in function argument accepting `IntoIterator` --> tests/ui/useless_conversion.rs:277:44 | LL | v0.into_iter().interleave_shortest(v1.into_iter()); | ^^------------ | | | help: consider removing the `.into_iter()` | note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()` --> tests/ui/useless_conversion.rs:264:20 | LL | J: IntoIterator, | ^^^^^^^^^^^^ error: useless conversion to the same type: `()` --> tests/ui/useless_conversion.rs:304:58 | LL | let _: Result<(), std::io::Error> = test_issue_3913().map(Into::into); | ^^^^^^^^^^^^^^^^ help: consider removing error: useless conversion to the same type: `std::io::Error` --> tests/ui/useless_conversion.rs:306:58 | LL | let _: Result<(), std::io::Error> = test_issue_3913().map_err(Into::into); | ^^^^^^^^^^^^^^^^^^^^ help: consider removing error: useless conversion to the same type: `()` --> tests/ui/useless_conversion.rs:308:58 | LL | let _: Result<(), std::io::Error> = test_issue_3913().map(From::from); | ^^^^^^^^^^^^^^^^ help: consider removing error: useless conversion to the same type: `std::io::Error` --> tests/ui/useless_conversion.rs:310:58 | LL | let _: Result<(), std::io::Error> = test_issue_3913().map_err(From::from); | ^^^^^^^^^^^^^^^^^^^^ help: consider removing error: useless conversion to the same type: `()` --> tests/ui/useless_conversion.rs:314:31 | LL | let _: ControlFlow<()> = c.map_break(Into::into); | ^^^^^^^^^^^^^^^^^^^^^^ help: consider removing error: useless conversion to the same type: `()` --> tests/ui/useless_conversion.rs:317:31 | LL | let _: ControlFlow<()> = c.map_continue(Into::into); | ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing error: useless conversion to the same type: `u32` --> tests/ui/useless_conversion.rs:331:41 | LL | let _: Vec = [1u32].into_iter().map(Into::into).collect(); | ^^^^^^^^^^^^^^^^ help: consider removing error: useless conversion to the same type: `T` --> tests/ui/useless_conversion.rs:342:18 | LL | x.into_iter().map(Into::into).collect() | ^^^^^^^^^^^^^^^^ help: consider removing error: explicit call to `.into_iter()` in function argument accepting `IntoIterator` --> tests/ui/useless_conversion.rs:358:29 | LL | takes_into_iter(self.my_field.into_iter()); | ^^^^^^^^^^^^^^^^^^^^^^^^^ | note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()` --> tests/ui/useless_conversion.rs:347:32 | LL | fn takes_into_iter(_: impl IntoIterator) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()` | LL - takes_into_iter(self.my_field.into_iter()); LL + takes_into_iter(&self.my_field); | error: explicit call to `.into_iter()` in function argument accepting `IntoIterator` --> tests/ui/useless_conversion.rs:366:29 | LL | takes_into_iter(self.my_field.into_iter()); | ^^^^^^^^^^^^^^^^^^^^^^^^^ | note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()` --> tests/ui/useless_conversion.rs:347:32 | LL | fn takes_into_iter(_: impl IntoIterator) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()` | LL - takes_into_iter(self.my_field.into_iter()); LL + takes_into_iter(&mut self.my_field); | error: explicit call to `.into_iter()` in function argument accepting `IntoIterator` --> tests/ui/useless_conversion.rs:375:29 | LL | takes_into_iter(self.my_field.into_iter()); | ^^^^^^^^^^^^^^^^^^^^^^^^^ | note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()` --> tests/ui/useless_conversion.rs:347:32 | LL | fn takes_into_iter(_: impl IntoIterator) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()` | LL - takes_into_iter(self.my_field.into_iter()); LL + takes_into_iter(*self.my_field); | error: explicit call to `.into_iter()` in function argument accepting `IntoIterator` --> tests/ui/useless_conversion.rs:384:29 | LL | takes_into_iter(self.my_field.into_iter()); | ^^^^^^^^^^^^^^^^^^^^^^^^^ | note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()` --> tests/ui/useless_conversion.rs:347:32 | LL | fn takes_into_iter(_: impl IntoIterator) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()` | LL - takes_into_iter(self.my_field.into_iter()); LL + takes_into_iter(&*self.my_field); | error: explicit call to `.into_iter()` in function argument accepting `IntoIterator` --> tests/ui/useless_conversion.rs:393:29 | LL | takes_into_iter(self.my_field.into_iter()); | ^^^^^^^^^^^^^^^^^^^^^^^^^ | note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()` --> tests/ui/useless_conversion.rs:347:32 | LL | fn takes_into_iter(_: impl IntoIterator) {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()` | LL - takes_into_iter(self.my_field.into_iter()); LL + takes_into_iter(&mut *self.my_field); | error: aborting due to 41 previous errors