src/test/run-pass-fulldeps/deriving-encodable-decodable-cell-refcell.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 // This briefly tests the capability of `Cell` and `RefCell` to implement the
  12 // `Encodable` and `Decodable` traits via `#[derive(Encodable, Decodable)]`
  13
  14
  15 #![feature(rustc_private)]
  16
  17 extern crate serialize;
  18
  19 use std::cell::{Cell, RefCell};
  20 use serialize::{Encodable, Decodable};
  21 use serialize::json;
  22
  23 #[derive(Encodable, Decodable)]
  24 struct A {
  25     baz: isize
  26 }
  27
  28 #[derive(Encodable, Decodable)]
  29 struct B {
  30     foo: Cell<bool>,
  31     bar: RefCell<A>,
  32 }
  33
  34 fn main() {
  35     let obj = B {
  36         foo: Cell::new(true),
  37         bar: RefCell::new( A { baz: 2 } )
  38     };
  39     let s = json::encode(&obj).unwrap();
  40     let obj2: B = json::decode(&s).unwrap();
  41     assert_eq!(obj.foo.get(), obj2.foo.get());
  42     assert_eq!(obj.bar.borrow().baz, obj2.bar.borrow().baz);
  43 }