| // Copyright 2016 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(nll)] |
| #![allow(unused_variables)] |
| |
| pub trait TryTransform { |
| fn try_transform<F>(self, f: F) |
| where |
| Self: Sized, |
| F: FnOnce(Self); |
| } |
| |
| impl<'a, T> TryTransform for &'a mut T { |
| fn try_transform<F>(self, f: F) |
| where |
| // The bug was that `Self: Sized` caused the lifetime of `this` to "extend" for all |
| // of 'a instead of only lasting as long as the binding is used (for just that line). |
| Self: Sized, |
| F: FnOnce(Self), |
| { |
| let this: *mut T = self as *mut T; |
| f(self); |
| } |
| } |
| |
| fn main() { |
| } |
