rust-lang/rust — pull request #19812 by frewsxcv (2014-12-13 15:00:42+00:00)
Title: Expansion should explicitly include enum

In preparation for [removing the std::cmp::Ordering reexport](https://github.com/rust-lang/rust/issues/19253), this needs
to be done to prevent errors like:

```
note: in expansion of #[deriving]
note: expansion site
error: unresolved name `std::cmp::Equal`
#[deriving(Clone, PartialEq, PartialOrd, Eq, Ord, Show)]
^~~
```