kennytm b326319f15 Rollup merge of #52759 - stjepang:impl-send-sync-for-joinhandle, r=TimNN ...

Impl Send & Sync for JoinHandle

This is just a cosmetic change - it slightly relaxes and clarifies the public API without effectively promising any new guarantees.

Currently we have [these auto trait implementations](https://doc.rust-lang.org/nightly/std/thread/struct.JoinHandle.html#synthetic-implementations):

```rust
impl<T: Send> Send for JoinHandle<T> {}
impl<T: Sync> Sync for JoinHandle<T> {}
```

Bound `T: Send` doesn't make much sense because `JoinHandle<T>` can be created only when `T: Send`. Note that [`JoinHandle::<T>::join`](https://doc.rust-lang.org/nightly/std/thread/struct.JoinHandle.html#method.join) doesn't require `T: Send` so why should the `Send` impl?

And the `Sync` impl doesn't need `T: Sync` because `JoinHandle<T>` cannot even share `T` - it can only send it to the thread that calls `join`.

2018-07-28 16:24:59 +08:00

..

local.rs

Fix the error reference for LocalKey::try_with

2018-06-27 07:13:28 +02:00

mod.rs

Rollup merge of #52759 - stjepang:impl-send-sync-for-joinhandle, r=TimNN

2018-07-28 16:24:59 +08:00