src/test/run-pass/overloaded-autoderef.rs

   1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 #![allow(unknown_features)]
  12 #![feature(box_syntax, collections, core)]
  13
  14 use std::cell::RefCell;
  15 use std::rc::Rc;
  16
  17 #[derive(PartialEq, Debug)]
  18 struct Point {
  19     x: isize,
  20     y: isize
  21 }
  22
  23 pub fn main() {
  24     let box_5: Box<_> = box 5_usize;
  25     let point = Rc::new(Point {x: 2, y: 4});
  26     assert_eq!(point.x, 2);
  27     assert_eq!(point.y, 4);
  28
  29     let i = Rc::new(RefCell::new(2));
  30     let i_value = *i.borrow();
  31     *i.borrow_mut() = 5;
  32     assert_eq!((i_value, *i.borrow()), (2, 5));
  33
  34     let s = Rc::new("foo".to_string());
  35     assert_eq!(&**s, "foo");
  36
  37     let mut_s = Rc::new(RefCell::new(String::from_str("foo")));
  38     mut_s.borrow_mut().push_str("bar");
  39     // HACK assert_eq! would panic here because it stores the LHS and RHS in two locals.
  40     assert!(&**mut_s.borrow() == "foobar");
  41     assert!(&**mut_s.borrow_mut() == "foobar");
  42
  43     let p = Rc::new(RefCell::new(Point {x: 1, y: 2}));
  44     p.borrow_mut().x = 3;
  45     p.borrow_mut().y += 3;
  46     assert_eq!(*p.borrow(), Point {x: 3, y: 5});
  47
  48     let v = Rc::new(RefCell::new([1, 2, 3]));
  49     v.borrow_mut()[0] = 3;
  50     v.borrow_mut()[1] += 3;
  51     assert_eq!((v.borrow()[0], v.borrow()[1], v.borrow()[2]), (3, 5, 3));
  52 }