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Fixed rustc_on_unimplemented example in Unstable Book #45574

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Oct 28, 2017
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Fixed rustc_on_unimplemented example in Unstable Book #45574

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8 changes: 4 additions & 4 deletions src/doc/unstable-book/src/language-features/on-unimplemented.md
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Original file line number Diff line number Diff line change
Expand Up @@ -15,8 +15,8 @@ For example:
```rust,compile_fail
#![feature(on_unimplemented)]

#[rustc_on_unimplemented="a collection of type `{Self}` cannot be built from an \
iterator over elements of type `{A}`"]
#[rustc_on_unimplemented="an iterator over elements of type `{A}` \
cannot be built from a collection of type `{Self}`"]
trait MyIterator<A> {
fn next(&mut self) -> A;
}
Expand All @@ -37,9 +37,9 @@ error[E0277]: the trait bound `&[{integer}]: MyIterator<char>` is not satisfied
--> <anon>:14:5
|
14 | iterate_chars(&[1, 2, 3][..]);
| ^^^^^^^^^^^^^ the trait `MyIterator<char>` is not implemented for `&[{integer}]`
| ^^^^^^^^^^^^^ an iterator over elements of type `char` cannot be built from a collection of type `&[{integer}]`
|
= note: a collection of type `&[{integer}]` cannot be built from an iterator over elements of type `char`
= help: the trait `MyIterator<char>` is not implemented for `&[{integer}]`
= note: required by `iterate_chars`

error: aborting due to previous error
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