src/test/ui-fulldeps/deriving-encodable-decodable-cell-refcell.rs

   1 // run-pass
   2
   3 #![allow(unused_imports)]
   4 // This briefly tests the capability of `Cell` and `RefCell` to implement the
   5 // `Encodable` and `Decodable` traits via `#[derive(Encodable, Decodable)]`
   6 #![feature(rustc_private)]
   7
   8 extern crate rustc_macros;
   9 extern crate rustc_serialize;
  10
  11 use rustc_macros::{Decodable, Encodable};
  12 use rustc_serialize::opaque::{MemDecoder, MemEncoder};
  13 use rustc_serialize::{Decodable, Encodable, Encoder};
  14 use std::cell::{Cell, RefCell};
  15
  16 #[derive(Encodable, Decodable)]
  17 struct A {
  18     baz: isize,
  19 }
  20
  21 #[derive(Encodable, Decodable)]
  22 struct B {
  23     foo: Cell<bool>,
  24     bar: RefCell<A>,
  25 }
  26
  27 fn main() {
  28     let obj = B { foo: Cell::new(true), bar: RefCell::new(A { baz: 2 }) };
  29
  30     let mut encoder = MemEncoder::new();
  31     obj.encode(&mut encoder);
  32     let data = encoder.finish();
  33
  34     let mut decoder = MemDecoder::new(&data, 0);
  35     let obj2 = B::decode(&mut decoder);
  36
  37     assert_eq!(obj.foo.get(), obj2.foo.get());
  38     assert_eq!(obj.bar.borrow().baz, obj2.bar.borrow().baz);
  39 }