src/test/run-pass/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 #![feature(old_orphan_check)]
  15
  16 extern crate serialize;
  17
  18 use std::cell::{Cell, RefCell};
  19 use serialize::{Encodable, Decodable};
  20 use serialize::json;
  21
  22 #[derive(Encodable, Decodable)]
  23 struct A {
  24     baz: int
  25 }
  26
  27 #[derive(Encodable, Decodable)]
  28 struct B {
  29     foo: Cell<bool>,
  30     bar: RefCell<A>,
  31 }
  32
  33 fn main() {
  34     let obj = B {
  35         foo: Cell::new(true),
  36         bar: RefCell::new( A { baz: 2 } )
  37     };
  38     let s = json::encode(&obj);
  39     let obj2: B = json::decode(s.as_slice()).unwrap();
  40     assert!(obj.foo.get() == obj2.foo.get());
  41     assert!(obj.bar.borrow().baz == obj2.bar.borrow().baz);
  42 }