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Diffstat (limited to '')
| -rw-r--r-- | tests/ui/iterators/invalid-iterator-chain-with-int-infer.stderr | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/tests/ui/iterators/invalid-iterator-chain-with-int-infer.stderr b/tests/ui/iterators/invalid-iterator-chain-with-int-infer.stderr new file mode 100644 index 000000000..3cb5e44c7 --- /dev/null +++ b/tests/ui/iterators/invalid-iterator-chain-with-int-infer.stderr @@ -0,0 +1,24 @@ +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:2:41 + | +LL | let x = Some(()).iter().map(|()| 1).sum::<f32>(); + | ^^^ value of type `f32` cannot be made by summing a `std::iter::Iterator<Item={integer}>` + | + = help: the trait `Sum<{integer}>` is not implemented for `f32` + = help: the following other types implement trait `Sum<A>`: + <f32 as Sum<&'a f32>> + <f32 as Sum> +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`. |