de70d76373
except where trait objects are involved. Part of issue #15349, though I'm leaving it open for trait objects. Cross borrowing for trait objects remains because it is needed until we have DST. This will break code like: fn foo(x: &int) { ... } let a = box 3i; foo(a); Change this code to: fn foo(x: &int) { ... } let a = box 3i; foo(&*a); [breaking-change]
62 lines
1.3 KiB
Rust
62 lines
1.3 KiB
Rust
// Copyright 2012 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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fn borrow(_v: &int) {}
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fn local() {
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let mut v = box 3i;
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borrow(&*v);
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}
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fn local_rec() {
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struct F { f: Box<int> }
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let mut v = F {f: box 3};
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borrow(&*v.f);
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}
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fn local_recs() {
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struct F { f: G }
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struct G { g: H }
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struct H { h: Box<int> }
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let mut v = F {f: G {g: H {h: box 3}}};
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borrow(&*v.f.g.h);
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}
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fn aliased_imm() {
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let mut v = box 3i;
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let _w = &v;
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borrow(&*v);
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}
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fn aliased_mut() {
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let mut v = box 3i;
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let _w = &mut v;
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borrow(&*v); //~ ERROR cannot borrow `*v`
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}
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fn aliased_other() {
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let mut v = box 3i;
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let mut w = box 4i;
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let _x = &mut w;
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borrow(&*v);
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}
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fn aliased_other_reassign() {
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let mut v = box 3i;
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let mut w = box 4i;
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let mut _x = &mut w;
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_x = &mut v;
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borrow(&*v); //~ ERROR cannot borrow `*v`
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}
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fn main() {
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}
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