25 lines
1.2 KiB
Plaintext
25 lines
1.2 KiB
Plaintext
error[E0277]: a value of type `f32` cannot be made by summing an iterator over elements of type `{integer}`
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--> $DIR/invalid-iterator-chain-with-int-infer.rs:2:41
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LL | let x = Some(()).iter().map(|()| 1).sum::<f32>();
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| ^^^ value of type `f32` cannot be made by summing a `std::iter::Iterator<Item={integer}>`
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= help: the trait `Sum<{integer}>` is not implemented for `f32`
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= help: the following other types implement trait `Sum<A>`:
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<f32 as Sum>
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<f32 as Sum<&'a f32>>
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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-with-int-infer.rs:2:29
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LL | let x = Some(()).iter().map(|()| 1).sum::<f32>();
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| -------- ------ ^^^^^^^^^^^ `Iterator::Item` changed to `{integer}` here
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| | |
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| | `Iterator::Item` is `&()` here
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| this expression has type `Option<()>`
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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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error: aborting due to previous error
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For more information about this error, try `rustc --explain E0277`.
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