| // 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. |
| |
| #![feature(box_syntax)] |
| |
| #[derive(Copy, Clone)] |
| struct A { a: isize, b: isize } |
| |
| struct B { a: isize, b: Box<isize> } |
| |
| fn var_copy_after_var_borrow() { |
| let mut x: isize = 1; |
| let p = &mut x; |
| drop(x); //~ ERROR cannot use `x` because it was mutably borrowed |
| *p = 2; |
| } |
| |
| fn var_copy_after_field_borrow() { |
| let mut x = A { a: 1, b: 2 }; |
| let p = &mut x.a; |
| drop(x); //~ ERROR cannot use `x` because it was mutably borrowed |
| *p = 3; |
| } |
| |
| fn field_copy_after_var_borrow() { |
| let mut x = A { a: 1, b: 2 }; |
| let p = &mut x; |
| drop(x.a); //~ ERROR cannot use `x.a` because it was mutably borrowed |
| p.a = 3; |
| } |
| |
| fn field_copy_after_field_borrow() { |
| let mut x = A { a: 1, b: 2 }; |
| let p = &mut x.a; |
| drop(x.a); //~ ERROR cannot use `x.a` because it was mutably borrowed |
| *p = 3; |
| } |
| |
| fn fu_field_copy_after_var_borrow() { |
| let mut x = A { a: 1, b: 2 }; |
| let p = &mut x; |
| let y = A { b: 3, .. x }; //~ ERROR cannot use `x.a` because it was mutably borrowed |
| drop(y); |
| p.a = 4; |
| } |
| |
| fn fu_field_copy_after_field_borrow() { |
| let mut x = A { a: 1, b: 2 }; |
| let p = &mut x.a; |
| let y = A { b: 3, .. x }; //~ ERROR cannot use `x.a` because it was mutably borrowed |
| drop(y); |
| *p = 4; |
| } |
| |
| fn var_deref_after_var_borrow() { |
| let mut x: Box<isize> = box 1; |
| let p = &mut x; |
| drop(*x); //~ ERROR cannot use `*x` because it was mutably borrowed |
| **p = 2; |
| } |
| |
| fn field_deref_after_var_borrow() { |
| let mut x = B { a: 1, b: box 2 }; |
| let p = &mut x; |
| drop(*x.b); //~ ERROR cannot use `*x.b` because it was mutably borrowed |
| p.a = 3; |
| } |
| |
| fn field_deref_after_field_borrow() { |
| let mut x = B { a: 1, b: box 2 }; |
| let p = &mut x.b; |
| drop(*x.b); //~ ERROR cannot use `*x.b` because it was mutably borrowed |
| **p = 3; |
| } |
| |
| fn main() { |
| var_copy_after_var_borrow(); |
| var_copy_after_field_borrow(); |
| |
| field_copy_after_var_borrow(); |
| field_copy_after_field_borrow(); |
| |
| fu_field_copy_after_var_borrow(); |
| fu_field_copy_after_field_borrow(); |
| |
| var_deref_after_var_borrow(); |
| field_deref_after_var_borrow(); |
| field_deref_after_field_borrow(); |
| } |