rust/src/test/run-pass/deriving-encodable-decodable-cell-refcell.rs

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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// This briefuly tests the capability of `Cell` and `RefCell` to implement the
// `Encodable` and `Decodable` traits via `#[deriving(Encodable, Decodable)]`
extern crate serialize;
use std::cell::{Cell, RefCell};
use std::io::MemWriter;
use serialize::{Encodable, Decodable};
use serialize::ebml;
use serialize::ebml::writer::Encoder;
use serialize::ebml::reader::Decoder;
#[deriving(Encodable, Decodable)]
struct A {
baz: int
}
#[deriving(Encodable, Decodable)]
struct B {
foo: Cell<bool>,
bar: RefCell<A>,
}
fn main() {
let obj = B {
foo: Cell::new(true),
bar: RefCell::new( A { baz: 2 } )
};
let mut w = MemWriter::new();
{
let mut e = Encoder::new(&mut w);
match obj.encode(&mut e) {
Ok(()) => (),
Err(e) => fail!("Failed to encode: {}", e)
};
}
let doc = ebml::Doc::new(w.get_ref());
let mut dec = Decoder::new(doc);
let obj2: B = match Decodable::decode(&mut dec) {
Ok(v) => v,
Err(e) => fail!("Failed to decode: {}", e)
};
assert!(obj.foo.get() == obj2.foo.get());
assert!(obj.bar.borrow().baz == obj2.bar.borrow().baz);
}