| // 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(dropck_eyepatch)] |
| |
| // This test ensures that a use of `#[may_dangle]` is rejected if |
| // it is not attached to an `unsafe impl`. |
| |
| use std::fmt; |
| |
| struct Dt<A: fmt::Debug>(&'static str, A); |
| struct Dr<'a, B:'a+fmt::Debug>(&'static str, &'a B); |
| struct Pt<A,B: fmt::Debug>(&'static str, A, B); |
| struct Pr<'a, 'b, B:'a+'b+fmt::Debug>(&'static str, &'a B, &'b B); |
| struct St<A: fmt::Debug>(&'static str, A); |
| struct Sr<'a, B:'a+fmt::Debug>(&'static str, &'a B); |
| |
| impl<A: fmt::Debug> Drop for Dt<A> { |
| fn drop(&mut self) { println!("drop {} {:?}", self.0, self.1); } |
| } |
| impl<'a, B: fmt::Debug> Drop for Dr<'a, B> { |
| fn drop(&mut self) { println!("drop {} {:?}", self.0, self.1); } |
| } |
| impl<#[may_dangle] A, B: fmt::Debug> Drop for Pt<A, B> { |
| //~^ ERROR requires an `unsafe impl` declaration due to `#[may_dangle]` attribute |
| |
| // (unsafe to access self.1 due to #[may_dangle] on A) |
| fn drop(&mut self) { println!("drop {} {:?}", self.0, self.2); } |
| } |
| impl<#[may_dangle] 'a, 'b, B: fmt::Debug> Drop for Pr<'a, 'b, B> { |
| //~^ ERROR requires an `unsafe impl` declaration due to `#[may_dangle]` attribute |
| |
| // (unsafe to access self.1 due to #[may_dangle] on 'a) |
| fn drop(&mut self) { println!("drop {} {:?}", self.0, self.2); } |
| } |
| |
| fn main() { |
| } |