| // Copyright 2017 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. |
| |
| #![feature(try_trait)] |
| |
| fn main() {} |
| |
| fn foo() -> Result<u32, ()> { |
| let x: Option<u32> = None; |
| x?; //~ the trait bound |
| Ok(22) |
| } |
| |
| fn bar() -> u32 { |
| let x: Option<u32> = None; |
| x?; //~ the `?` operator |
| 22 |
| } |