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7b9105dd88
Remove default note for "trait is not implemented" in favor of the more colorful diff output from the previous commit. Removes duplicated output.
158 lines
7.1 KiB
Plaintext
158 lines
7.1 KiB
Plaintext
error[E0277]: a value of type `Vec<X>` cannot be built from an iterator over elements of type `&X`
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--> $DIR/invalid-iterator-chain-fixable.rs:7:7
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LL | let i = i.map(|x| x.clone());
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| ------- this method call is cloning the reference `&X`, not `X` which doesn't implement `Clone`
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LL | i.collect()
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| ^^^^^^^ value of type `Vec<X>` cannot be built from `std::iter::Iterator<Item=&X>`
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= help: the trait `FromIterator<&_>` is not implemented for `Vec<X>`
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but trait `FromIterator<_>` is implemented for it
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= help: for that trait implementation, expected `X`, found `&X`
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note: the method call chain might not have had the expected associated types
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--> $DIR/invalid-iterator-chain-fixable.rs:5:26
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LL | fn iter_to_vec<'b, X>(i: Iter<'b, X>) -> Vec<X> {
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| ^^^^^^^^^^^ `Iterator::Item` is `&X` here
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LL | let i = i.map(|x| x.clone());
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| ------------------ `Iterator::Item` remains `&X` here
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note: required by a bound in `collect`
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--> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
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help: consider further restricting type parameter `X`
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LL | fn iter_to_vec<'b, X>(i: Iter<'b, X>) -> Vec<X> where X: Clone {
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| ++++++++++++++
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error[E0277]: a value of type `i32` cannot be made by summing an iterator over elements of type `()`
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--> $DIR/invalid-iterator-chain-fixable.rs:17:33
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LL | println!("{}", scores.sum::<i32>());
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| --- ^^^ value of type `i32` cannot be made by summing a `std::iter::Iterator<Item=()>`
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| |
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| required by a bound introduced by this call
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= help: the trait `Sum<()>` is not implemented for `i32`
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= help: the following other types implement trait `Sum<A>`:
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`i32` implements `Sum<&i32>`
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`i32` implements `Sum`
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note: the method call chain might not have had the expected associated types
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--> $DIR/invalid-iterator-chain-fixable.rs:14:10
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LL | let v = vec![(0, 0)];
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| ------------ this expression has type `Vec<({integer}, {integer})>`
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LL | let scores = v
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LL | .iter()
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| ------ `Iterator::Item` is `&({integer}, {integer})` here
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LL | .map(|(a, b)| {
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| __________^
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LL | | a + b;
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LL | | });
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| |__________^ `Iterator::Item` changed to `()` here
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note: required by a bound in `std::iter::Iterator::sum`
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--> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
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help: consider removing this semicolon
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LL - a + b;
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LL + a + b
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error[E0277]: a value of type `i32` cannot be made by summing an iterator over elements of type `()`
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--> $DIR/invalid-iterator-chain-fixable.rs:25:20
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LL | .sum::<i32>(),
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| --- ^^^ value of type `i32` cannot be made by summing a `std::iter::Iterator<Item=()>`
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| |
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| required by a bound introduced by this call
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= help: the trait `Sum<()>` is not implemented for `i32`
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= help: the following other types implement trait `Sum<A>`:
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`i32` implements `Sum<&i32>`
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`i32` implements `Sum`
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note: the method call chain might not have had the expected associated types
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--> $DIR/invalid-iterator-chain-fixable.rs:23:14
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LL | vec![0, 1]
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| ---------- this expression has type `Vec<{integer}>`
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LL | .iter()
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| ------ `Iterator::Item` is `&{integer}` here
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LL | .map(|x| x * 2)
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| -------------- `Iterator::Item` changed to `{integer}` here
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LL | .map(|x| { x; })
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| ^^^^^^^^^^^^^^^ `Iterator::Item` changed to `()` here
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LL | .map(|x| { x })
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| -------------- `Iterator::Item` remains `()` here
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note: required by a bound in `std::iter::Iterator::sum`
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--> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
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help: consider removing this semicolon
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LL - .map(|x| { x; })
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LL + .map(|x| { x })
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error[E0277]: a value of type `i32` cannot be made by summing an iterator over elements of type `()`
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--> $DIR/invalid-iterator-chain-fixable.rs:27:60
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LL | println!("{}", vec![0, 1].iter().map(|x| { x; }).sum::<i32>());
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| --- ^^^ value of type `i32` cannot be made by summing a `std::iter::Iterator<Item=()>`
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| |
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| required by a bound introduced by this call
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= help: the trait `Sum<()>` is not implemented for `i32`
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= help: the following other types implement trait `Sum<A>`:
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`i32` implements `Sum<&i32>`
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`i32` implements `Sum`
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note: the method call chain might not have had the expected associated types
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--> $DIR/invalid-iterator-chain-fixable.rs:27:38
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LL | println!("{}", vec![0, 1].iter().map(|x| { x; }).sum::<i32>());
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| ---------- ------ ^^^^^^^^^^^^^^^ `Iterator::Item` changed to `()` here
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| | |
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| | `Iterator::Item` is `&{integer}` here
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| this expression has type `Vec<{integer}>`
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note: required by a bound in `std::iter::Iterator::sum`
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--> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
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help: consider removing this semicolon
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LL - println!("{}", vec![0, 1].iter().map(|x| { x; }).sum::<i32>());
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LL + println!("{}", vec![0, 1].iter().map(|x| { x }).sum::<i32>());
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error[E0277]: a value of type `Vec<i32>` cannot be built from an iterator over elements of type `()`
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--> $DIR/invalid-iterator-chain-fixable.rs:36:25
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LL | let g: Vec<i32> = f.collect();
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| ^^^^^^^ value of type `Vec<i32>` cannot be built from `std::iter::Iterator<Item=()>`
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= help: the trait `FromIterator<()>` is not implemented for `Vec<i32>`
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but trait `FromIterator<i32>` is implemented for it
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= help: for that trait implementation, expected `i32`, found `()`
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note: the method call chain might not have had the expected associated types
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--> $DIR/invalid-iterator-chain-fixable.rs:32:15
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LL | let a = vec![0];
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| ------- this expression has type `Vec<{integer}>`
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LL | let b = a.into_iter();
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| ----------- `Iterator::Item` is `{integer}` here
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LL | let c = b.map(|x| x + 1);
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| -------------- `Iterator::Item` remains `{integer}` here
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LL | let d = c.filter(|x| *x > 10 );
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| -------------------- `Iterator::Item` remains `{integer}` here
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LL | let e = d.map(|x| {
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| _______________^
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LL | | x + 1;
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LL | | });
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| |______^ `Iterator::Item` changed to `()` here
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LL | let f = e.filter(|_| false);
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| ----------------- `Iterator::Item` remains `()` here
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note: required by a bound in `collect`
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--> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
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help: consider removing this semicolon
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LL - x + 1;
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LL + x + 1
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error: aborting due to 5 previous errors
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For more information about this error, try `rustc --explain E0277`.
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