/
borrowck-box-insensitivity.rs
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borrowck-box-insensitivity.rs
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// 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)]
struct A {
x: Box<isize>,
y: isize,
}
struct B {
x: Box<isize>,
y: Box<isize>,
}
struct C {
x: Box<A>,
y: isize,
}
struct D {
x: Box<A>,
y: Box<isize>,
}
fn copy_after_move() {
let a: Box<_> = box A { x: box 0, y: 1 };
let _x = a.x;
//~^ value moved here
let _y = a.y; //~ ERROR use of moved
//~^ move occurs because `a.x` has type `Box<isize>`
//~| value used here after move
}
fn move_after_move() {
let a: Box<_> = box B { x: box 0, y: box 1 };
let _x = a.x;
//~^ value moved here
let _y = a.y; //~ ERROR use of moved
//~^ move occurs because `a.x` has type `Box<isize>`
//~| value used here after move
}
fn borrow_after_move() {
let a: Box<_> = box A { x: box 0, y: 1 };
let _x = a.x;
//~^ value moved here
let _y = &a.y; //~ ERROR use of moved
//~^ move occurs because `a.x` has type `Box<isize>`
//~| value used here after move
}
fn move_after_borrow() {
let a: Box<_> = box B { x: box 0, y: box 1 };
let _x = &a.x;
//~^ NOTE borrow of `a.x` occurs here
let _y = a.y; //~ ERROR cannot move
}
fn copy_after_mut_borrow() {
let mut a: Box<_> = box A { x: box 0, y: 1 };
let _x = &mut a.x;
//~^ NOTE borrow of `a.x` occurs here
let _y = a.y; //~ ERROR cannot use
}
fn move_after_mut_borrow() {
let mut a: Box<_> = box B { x: box 0, y: box 1 };
let _x = &mut a.x;
//~^ NOTE borrow of `a.x` occurs here
let _y = a.y; //~ ERROR cannot move
}
fn borrow_after_mut_borrow() {
let mut a: Box<_> = box A { x: box 0, y: 1 };
let _x = &mut a.x;
//~^ NOTE mutable borrow occurs here (via `a.x`)
let _y = &a.y; //~ ERROR cannot borrow
//~^ immutable borrow occurs here (via `a.y`)
}
//~^ NOTE mutable borrow ends here
fn mut_borrow_after_borrow() {
let mut a: Box<_> = box A { x: box 0, y: 1 };
let _x = &a.x;
//~^ NOTE immutable borrow occurs here (via `a.x`)
let _y = &mut a.y; //~ ERROR cannot borrow
//~^ mutable borrow occurs here (via `a.y`)
}
//~^ NOTE immutable borrow ends here
fn copy_after_move_nested() {
let a: Box<_> = box C { x: box A { x: box 0, y: 1 }, y: 2 };
let _x = a.x.x;
//~^ value moved here
let _y = a.y; //~ ERROR use of collaterally moved
//~^ NOTE move occurs because `a.x.x` has type `Box<isize>`
//~| value used here after move
}
fn move_after_move_nested() {
let a: Box<_> = box D { x: box A { x: box 0, y: 1 }, y: box 2 };
let _x = a.x.x;
//~^ value moved here
let _y = a.y; //~ ERROR use of collaterally moved
//~^ NOTE move occurs because `a.x.x` has type `Box<isize>`
//~| value used here after move
}
fn borrow_after_move_nested() {
let a: Box<_> = box C { x: box A { x: box 0, y: 1 }, y: 2 };
let _x = a.x.x;
//~^ value moved here
let _y = &a.y; //~ ERROR use of collaterally moved
//~^ NOTE move occurs because `a.x.x` has type `Box<isize>`
//~| value used here after move
}
fn move_after_borrow_nested() {
let a: Box<_> = box D { x: box A { x: box 0, y: 1 }, y: box 2 };
let _x = &a.x.x;
//~^ borrow of `a.x.x` occurs here
let _y = a.y; //~ ERROR cannot move
}
fn copy_after_mut_borrow_nested() {
let mut a: Box<_> = box C { x: box A { x: box 0, y: 1 }, y: 2 };
let _x = &mut a.x.x;
//~^ NOTE borrow of `a.x.x` occurs here
let _y = a.y; //~ ERROR cannot use
}
fn move_after_mut_borrow_nested() {
let mut a: Box<_> = box D { x: box A { x: box 0, y: 1 }, y: box 2 };
let _x = &mut a.x.x;
//~^ NOTE borrow of `a.x.x` occurs here
let _y = a.y; //~ ERROR cannot move
}
fn borrow_after_mut_borrow_nested() {
let mut a: Box<_> = box C { x: box A { x: box 0, y: 1 }, y: 2 };
let _x = &mut a.x.x;
//~^ mutable borrow occurs here
let _y = &a.y; //~ ERROR cannot borrow
//~^ immutable borrow occurs here
}
//~^ NOTE mutable borrow ends here
fn mut_borrow_after_borrow_nested() {
let mut a: Box<_> = box C { x: box A { x: box 0, y: 1 }, y: 2 };
let _x = &a.x.x;
//~^ immutable borrow occurs here
let _y = &mut a.y; //~ ERROR cannot borrow
//~^ mutable borrow occurs here
}
//~^ NOTE immutable borrow ends here
fn main() {
copy_after_move();
move_after_move();
borrow_after_move();
move_after_borrow();
copy_after_mut_borrow();
move_after_mut_borrow();
borrow_after_mut_borrow();
mut_borrow_after_borrow();
copy_after_move_nested();
move_after_move_nested();
borrow_after_move_nested();
move_after_borrow_nested();
copy_after_mut_borrow_nested();
move_after_mut_borrow_nested();
borrow_after_mut_borrow_nested();
mut_borrow_after_borrow_nested();
}