[rustc.git] / src / librustc_error_codes / error_codes / E0670.md

Rust 2015 does not permit the use of `async fn`.

Erroneous code example:

```compile_fail,E0670
async fn foo() {}
```

Switch to the Rust 2018 edition to use `async fn`.
Commit	Line	Data
60c5eb7d XL	1	Rust 2015 does not permit the use of `async fn`.
60c5eb7d XL	2
f035d41b	3	Erroneous code example:
60c5eb7d XL	4
	5	```compile_fail,E0670
	6	async fn foo() {}
	7	```
	8
	9	Switch to the Rust 2018 edition to use `async fn`.