| // Copyright 2015 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. |
| |
| // check that misc. method calls are well-formed |
| |
| use std::marker::PhantomData; |
| use std::ops::{Deref, Shl}; |
| |
| #[derive(Copy, Clone)] |
| struct S<'a, 'b: 'a> { |
| marker: PhantomData<&'a &'b ()>, |
| bomb: Option<&'b u32> |
| } |
| |
| type S2<'a> = S<'a, 'a>; |
| |
| impl<'a, 'b> S<'a, 'b> { |
| fn transmute_inherent(&self, a: &'b u32) -> &'a u32 { |
| a |
| } |
| } |
| |
| fn return_dangling_pointer_inherent(s: S2) -> &u32 { |
| let s = s; |
| s.transmute_inherent(&mut 42) //~ ERROR does not live long enough |
| } |
| |
| impl<'a, 'b> Deref for S<'a, 'b> { |
| type Target = &'a u32; |
| fn deref(&self) -> &&'a u32 { |
| self.bomb.as_ref().unwrap() |
| } |
| } |
| |
| fn return_dangling_pointer_coerce(s: S2) -> &u32 { |
| let four = 4; |
| let mut s = s; |
| s.bomb = Some(&four); //~ ERROR does not live long enough |
| &s |
| } |
| |
| fn return_dangling_pointer_unary_op(s: S2) -> &u32 { |
| let four = 4; |
| let mut s = s; |
| s.bomb = Some(&four); //~ ERROR does not live long enough |
| &*s |
| } |
| |
| impl<'a, 'b> Shl<&'b u32> for S<'a, 'b> { |
| type Output = &'a u32; |
| fn shl(self, t: &'b u32) -> &'a u32 { t } |
| } |
| |
| fn return_dangling_pointer_binary_op(s: S2) -> &u32 { |
| let s = s; |
| s << &mut 3 //~ ERROR does not live long enough |
| } |
| |
| fn return_dangling_pointer_method(s: S2) -> &u32 { |
| let s = s; |
| s.shl(&mut 3) //~ ERROR does not live long enough |
| } |
| |
| fn return_dangling_pointer_ufcs(s: S2) -> &u32 { |
| let s = s; |
| S2::shl(s, &mut 3) //~ ERROR does not live long enough |
| } |
| |
| fn main() { |
| let s = S { marker: PhantomData, bomb: None }; |
| let _inherent_dp = return_dangling_pointer_inherent(s); |
| let _coerce_dp = return_dangling_pointer_coerce(s); |
| let _unary_dp = return_dangling_pointer_unary_op(s); |
| let _binary_dp = return_dangling_pointer_binary_op(s); |
| let _method_dp = return_dangling_pointer_method(s); |
| let _ufcs_dp = return_dangling_pointer_ufcs(s); |
| } |