Utilize fewer reexports

In regards to:

https://github.com/rust-lang/rust/issues/19253#issuecomment-64836729

This commit:

* Changes the #deriving code so that it generates code that utilizes fewer
  reexports (in particur Option::* and Result::*), which is necessary to
  remove those reexports in the future
* Changes other areas of the codebase so that fewer reexports are utilized

1 files changed, 6 insertions, 3 deletions

diff --git a/src/libcore/slice.rs b/src/libcore/slice.rs
index ce9f551670b..b8df36c91bc 100644
--- a/src/libcore/slice.rs
+++ b/src/libcore/slice.rs
@@ -36,13 +36,15 @@
 
 use mem::transmute;
 use clone::Clone;
-use cmp::{PartialEq, PartialOrd, Eq, Ord, Ordering, Less, Equal, Greater, Equiv};
+use cmp::{Ordering, PartialEq, PartialOrd, Eq, Ord, Equiv};
+use cmp::Ordering::{Less, Equal, Greater};
 use cmp;
 use default::Default;
 use iter::*;
 use num::Int;
 use ops;
-use option::{None, Option, Some};
+use option::Option;
+use option::Option::{None, Some};
 use ptr;
 use ptr::RawPtr;
 use mem;
@@ -1702,7 +1704,8 @@ pub mod raw {
     use mem::transmute;
     use ptr::RawPtr;
     use raw::Slice;
-    use option::{None, Option, Some};
+    use option::Option;
+    use option::Option::{None, Some};
 
     /// Form a slice from a pointer and length (as a number of units,
     /// not bytes).