| // Copyright 2014 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. |
| |
| // revisions: ast mir |
| //[mir]compile-flags: -Z borrowck=mir |
| |
| fn borrow_mut<T>(x: &mut T) -> &mut T { x } |
| fn borrow<T>(x: &T) -> &T { x } |
| |
| fn borrow_mut2<T>(_: &mut T, _: &mut T) {} |
| fn borrow2<T>(_: &mut T, _: &T) {} |
| |
| fn double_mut_borrow<T>(x: &mut Box<T>) { |
| let y = borrow_mut(x); |
| let z = borrow_mut(x); |
| //[ast]~^ ERROR cannot borrow `*x` as mutable more than once at a time |
| //[mir]~^^ ERROR cannot borrow `*x` as mutable more than once at a time |
| drop((y, z)); |
| } |
| |
| fn double_imm_borrow(x: &mut Box<i32>) { |
| let y = borrow(x); |
| let z = borrow(x); |
| **x += 1; |
| //[ast]~^ ERROR cannot assign to `**x` because it is borrowed |
| //[mir]~^^ ERROR cannot assign to `**x` because it is borrowed |
| drop((y, z)); |
| } |
| |
| fn double_mut_borrow2<T>(x: &mut Box<T>) { |
| borrow_mut2(x, x); |
| //[ast]~^ ERROR cannot borrow `*x` as mutable more than once at a time |
| //[mir]~^^ ERROR cannot borrow `*x` as mutable more than once at a time |
| } |
| |
| fn double_borrow2<T>(x: &mut Box<T>) { |
| borrow2(x, x); |
| //[ast]~^ ERROR cannot borrow `*x` as immutable because it is also borrowed as mutable |
| //[mir]~^^ ERROR cannot borrow `*x` as immutable because it is also borrowed as mutable |
| } |
| |
| pub fn main() {} |