9330bae4bd
impls. This is a [breaking-change] (for gated code) in that when you implement `Fn` (`FnMut`) you must also implement `FnOnce`. This commit demonstrates how to fix it.
16 lines
588 B
Rust
16 lines
588 B
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
|
|
// file at the top-level directory of this distribution and at
|
|
// http://rust-lang.org/COPYRIGHT.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
fn main() {
|
|
let x: Option<&[u8]> = Some("foo").map(std::mem::transmute);
|
|
//~^ ERROR E0277
|
|
//~| ERROR E0277
|
|
}
|