| // 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. |
| |
| // Tests that two closures cannot simultaneously have mutable |
| // and immutable access to the variable. Issue #6801. |
| |
| // ignore-tidy-linelength |
| // revisions: ast mir |
| //[mir]compile-flags: -Z borrowck=mir |
| |
| #![feature(box_syntax)] |
| |
| fn get(x: &isize) -> isize { |
| *x |
| } |
| |
| fn set(x: &mut isize) { |
| *x = 4; |
| } |
| |
| fn a() { |
| let mut x = 3; |
| let c1 = || x = 4; |
| let c2 = || x * 5; //[ast]~ ERROR cannot borrow `x` |
| //[mir]~^ ERROR cannot borrow `x` as immutable because it is also borrowed as mutable |
| drop(c1); |
| } |
| |
| fn b() { |
| let mut x = 3; |
| let c1 = || set(&mut x); |
| let c2 = || get(&x); //[ast]~ ERROR cannot borrow `x` |
| //[mir]~^ ERROR cannot borrow `x` as immutable because it is also borrowed as mutable |
| drop(c1); |
| } |
| |
| fn c() { |
| let mut x = 3; |
| let c1 = || set(&mut x); |
| let c2 = || x * 5; //[ast]~ ERROR cannot borrow `x` |
| //[mir]~^ ERROR cannot borrow `x` as immutable because it is also borrowed as mutable |
| drop(c1); |
| } |
| |
| fn d() { |
| let mut x = 3; |
| let c2 = || x * 5; |
| x = 5; //[ast]~ ERROR cannot assign |
| //[mir]~^ ERROR cannot assign to `x` because it is borrowed |
| drop(c2); |
| } |
| |
| fn e() { |
| let mut x = 3; |
| let c1 = || get(&x); |
| x = 5; //[ast]~ ERROR cannot assign |
| //[mir]~^ ERROR cannot assign to `x` because it is borrowed |
| drop(c1); |
| } |
| |
| fn f() { |
| let mut x: Box<_> = box 3; |
| let c1 = || get(&*x); |
| *x = 5; //[ast]~ ERROR cannot assign to `*x` |
| //[mir]~^ ERROR cannot assign to `*x` because it is borrowed |
| drop(c1); |
| } |
| |
| fn g() { |
| struct Foo { |
| f: Box<isize> |
| } |
| |
| let mut x: Box<_> = box Foo { f: box 3 }; |
| let c1 = || get(&*x.f); |
| *x.f = 5; //[ast]~ ERROR cannot assign to `*x.f` |
| //[mir]~^ ERROR cannot assign to `*x.f` because it is borrowed |
| drop(c1); |
| } |
| |
| fn h() { |
| struct Foo { |
| f: Box<isize> |
| } |
| |
| let mut x: Box<_> = box Foo { f: box 3 }; |
| let c1 = || get(&*x.f); |
| let c2 = || *x.f = 5; //[ast]~ ERROR cannot borrow `x` as mutable |
| //[mir]~^ ERROR cannot borrow `x` as mutable because it is also borrowed as immutable |
| drop(c1); |
| } |
| |
| fn main() { |
| } |