35 lines
978 B
Rust
35 lines
978 B
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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// Test that attempt to reborrow an `&mut` pointer in an aliasable
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// location yields an error.
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//
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// Example from src/librustc_borrowck/borrowck/README.md
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fn foo(t0: & &mut isize) {
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let t1 = t0;
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let p: &isize = &**t0;
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**t1 = 22; //~ ERROR cannot assign
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}
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fn foo3(t0: &mut &mut isize) {
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let t1 = &mut *t0;
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let p: &isize = &**t0; //~ ERROR cannot borrow
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**t1 = 22;
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}
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fn foo4(t0: & &mut isize) {
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let x: &mut isize = &mut **t0; //~ ERROR cannot borrow
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*x += 1;
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}
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fn main() {
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}
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