mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-23 15:23:46 +00:00
27 lines
1.3 KiB
Plaintext
27 lines
1.3 KiB
Plaintext
error[E0277]: a value of type `f32` cannot be made by summing an iterator over elements of type `{integer}`
|
|
--> $DIR/invalid-iterator-chain-with-int-infer.rs:2:47
|
|
|
|
|
LL | let x = Some(()).iter().map(|()| 1).sum::<f32>();
|
|
| --- ^^^ value of type `f32` cannot be made by summing a `std::iter::Iterator<Item={integer}>`
|
|
| |
|
|
| required by a bound introduced by this call
|
|
|
|
|
= help: the trait `Sum<{integer}>` is not implemented for `f32`
|
|
= help: the following other types implement trait `Sum<A>`:
|
|
<f32 as Sum>
|
|
<f32 as Sum<&'a f32>>
|
|
note: the method call chain might not have had the expected associated types
|
|
--> $DIR/invalid-iterator-chain-with-int-infer.rs:2:29
|
|
|
|
|
LL | let x = Some(()).iter().map(|()| 1).sum::<f32>();
|
|
| -------- ------ ^^^^^^^^^^^ `Iterator::Item` changed to `{integer}` here
|
|
| | |
|
|
| | `Iterator::Item` is `&()` here
|
|
| this expression has type `Option<()>`
|
|
note: required by a bound in `std::iter::Iterator::sum`
|
|
--> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
|
|
|
|
error: aborting due to previous error
|
|
|
|
For more information about this error, try `rustc --explain E0277`.
|