57 lines
1.9 KiB
Rust
57 lines
1.9 KiB
Rust
// 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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#![allow(unknown_features)]
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#![feature(box_syntax, collections, core)]
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use std::cell::RefCell;
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use std::rc::Rc;
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use std::num::ToPrimitive;
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#[derive(PartialEq, Debug)]
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struct Point {
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x: isize,
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y: isize
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}
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pub fn main() {
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let box_5: Box<_> = box 5_usize;
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assert_eq!(Rc::new(5_usize).to_uint(), Some(5));
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// FIXME (#22405): Replace `Box::new` with `box` here when/if possible.
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assert_eq!((Box::new(&Box::new(&Rc::new(Box::new(Box::new(&box_5)))))).to_uint(), Some(5));
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let point = Rc::new(Point {x: 2, y: 4});
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assert_eq!(point.x, 2);
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assert_eq!(point.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".to_string());
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assert_eq!(&**s, "foo");
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let mut_s = Rc::new(RefCell::new(String::from_str("foo")));
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mut_s.borrow_mut().push_str("bar");
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// HACK assert_eq! would panic here because it stores the LHS and RHS in two locals.
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assert!(&**mut_s.borrow() == "foobar");
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assert!(&**mut_s.borrow_mut() == "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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