50 lines
1.6 KiB
Rust
50 lines
1.6 KiB
Rust
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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use std::cell::RefCell;
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use std::rc::Rc;
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#[deriving(Eq, Show)]
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struct Point {
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x: int,
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y: int
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}
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pub fn main() {
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assert_eq!(*Rc::new(5), 5);
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assert_eq!(***Rc::new(~~5), 5);
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assert_eq!(*Rc::new(Point {x: 2, y: 4}), Point {x: 2, y: 4});
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let i = Rc::new(RefCell::new(2));
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let i_value = *(*i).borrow();
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*(*i).borrow_mut() = 5;
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assert_eq!((i_value, *(*i).borrow()), (2, 5));
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let s = Rc::new(~"foo");
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assert_eq!(*s, ~"foo");
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assert_eq!((*s).as_slice(), "foo");
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let mut_s = Rc::new(RefCell::new(~"foo"));
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(*(*mut_s).borrow_mut()).push_str("bar");
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// assert_eq! would fail here because it stores the LHS and RHS in two locals.
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assert!((*(*mut_s).borrow()).as_slice() == "foobar");
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assert!((*(*mut_s).borrow_mut()).as_slice() == "foobar");
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let p = Rc::new(RefCell::new(Point {x: 1, y: 2}));
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(*(*p).borrow_mut()).x = 3;
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(*(*p).borrow_mut()).y += 3;
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assert_eq!(*(*p).borrow(), Point {x: 3, y: 5});
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let v = Rc::new(RefCell::new(~[1, 2, 3]));
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(*(*v).borrow_mut())[0] = 3;
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(*(*v).borrow_mut())[1] += 3;
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assert_eq!(((*(*v).borrow())[0], (*(*v).borrow())[1], (*(*v).borrow())[2]), (3, 5, 3));
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}
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