85 lines
2.3 KiB
Rust
85 lines
2.3 KiB
Rust
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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// check that misc. method calls are well-formed
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use std::marker::PhantomData;
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use std::ops::{Deref, Shl};
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#[derive(Copy, Clone)]
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struct S<'a, 'b: 'a> {
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marker: PhantomData<&'a &'b ()>,
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bomb: Option<&'b u32>
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}
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type S2<'a> = S<'a, 'a>;
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impl<'a, 'b> S<'a, 'b> {
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fn transmute_inherent(&self, a: &'b u32) -> &'a u32 {
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a
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}
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}
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fn return_dangling_pointer_inherent(s: S2) -> &u32 {
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let s = s;
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s.transmute_inherent(&mut 42) //~ ERROR does not live long enough
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}
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impl<'a, 'b> Deref for S<'a, 'b> {
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type Target = &'a u32;
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fn deref(&self) -> &&'a u32 {
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self.bomb.as_ref().unwrap()
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}
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}
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fn return_dangling_pointer_coerce(s: S2) -> &u32 {
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let four = 4;
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let mut s = s;
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s.bomb = Some(&four); //~ ERROR does not live long enough
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&s
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}
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fn return_dangling_pointer_unary_op(s: S2) -> &u32 {
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let four = 4;
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let mut s = s;
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s.bomb = Some(&four); //~ ERROR does not live long enough
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&*s
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}
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impl<'a, 'b> Shl<&'b u32> for S<'a, 'b> {
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type Output = &'a u32;
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fn shl(self, t: &'b u32) -> &'a u32 { t }
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}
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fn return_dangling_pointer_binary_op(s: S2) -> &u32 {
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let s = s;
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s << &mut 3 //~ ERROR does not live long enough
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}
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fn return_dangling_pointer_method(s: S2) -> &u32 {
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let s = s;
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s.shl(&mut 3) //~ ERROR does not live long enough
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}
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fn return_dangling_pointer_ufcs(s: S2) -> &u32 {
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let s = s;
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S2::shl(s, &mut 3) //~ ERROR does not live long enough
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}
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fn main() {
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let s = S { marker: PhantomData, bomb: None };
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let _inherent_dp = return_dangling_pointer_inherent(s);
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let _coerce_dp = return_dangling_pointer_coerce(s);
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let _unary_dp = return_dangling_pointer_unary_op(s);
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let _binary_dp = return_dangling_pointer_binary_op(s);
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let _method_dp = return_dangling_pointer_method(s);
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let _ufcs_dp = return_dangling_pointer_ufcs(s);
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}
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