[rustc.git] / src / librustc_error_codes / error_codes / E0642.md

Trait methods currently cannot take patterns as arguments.

Erroneous code example:

```compile_fail,E0642
trait Foo {
    fn foo((x, y): (i32, i32)); // error: patterns aren't allowed
                                //        in trait methods
}
```

You can instead use a single name for the argument:

```
trait Foo {
    fn foo(x_and_y: (i32, i32)); // ok!
}
```
Commit	Line	Data
60c5eb7d XL	1	Trait methods currently cannot take patterns as arguments.
60c5eb7d XL	2
f035d41b	3	Erroneous code example:
60c5eb7d XL	4
	5	```compile_fail,E0642
	6	trait Foo {
	7	fn foo((x, y): (i32, i32)); // error: patterns aren't allowed
	8	// in trait methods
	9	}
	10	```
	11
	12	You can instead use a single name for the argument:
	13
	14	```
	15	trait Foo {
	16	fn foo(x_and_y: (i32, i32)); // ok!
	17	}
	18	```