Switch to purely namespaced enums

This breaks code that referred to variant names in the same namespace as
their enum. Reexport the variants in the old location or alter code to
refer to the new locations:

```
pub enum Foo {
    A,
    B
}

fn main() {
    let a = A;
}
```
=>
```
pub use self::Foo::{A, B};

pub enum Foo {
    A,
    B
}

fn main() {
    let a = A;
}
```
or
```
pub enum Foo {
    A,
    B
}

fn main() {
    let a = Foo::A;
}
```

[breaking-change]

1 files changed, 10 insertions, 7 deletions

diff --git a/src/libstd/rt/backtrace.rs b/src/libstd/rt/backtrace.rs
index 59a10f79d93..0f888bd222c 100644
--- a/src/libstd/rt/backtrace.rs
+++ b/src/libstd/rt/backtrace.rs
@@ -541,6 +541,8 @@ mod imp {
     #[allow(non_snake_case)]
     #[allow(dead_code)]
     mod uw {
+        pub use self::_Unwind_Reason_Code::*;
+
         use libc;
 
         #[repr(C)]
@@ -622,7 +624,8 @@ mod imp {
 
             let mut val: _Unwind_Word = 0;
             let ptr = &mut val as *mut _Unwind_Word;
-            let _ = _Unwind_VRS_Get(ctx, _UVRSC_CORE, 15, _UVRSD_UINT32,
+            let _ = _Unwind_VRS_Get(ctx, _Unwind_VRS_RegClass::_UVRSC_CORE, 15,
+                                    _Unwind_VRS_DataRepresentation::_UVRSD_UINT32,
                                     ptr as *mut libc::c_void);
             (val & !1) as libc::uintptr_t
         }
@@ -813,11 +816,11 @@ mod imp {
         pub fn init_frame(frame: &mut super::STACKFRAME64,
                           ctx: &CONTEXT) -> libc::DWORD {
             frame.AddrPC.Offset = ctx.Eip as u64;
-            frame.AddrPC.Mode = super::AddrModeFlat;
+            frame.AddrPC.Mode = super::ADDRESS_MODE::AddrModeFlat;
             frame.AddrStack.Offset = ctx.Esp as u64;
-            frame.AddrStack.Mode = super::AddrModeFlat;
+            frame.AddrStack.Mode = super::ADDRESS_MODE::AddrModeFlat;
             frame.AddrFrame.Offset = ctx.Ebp as u64;
-            frame.AddrFrame.Mode = super::AddrModeFlat;
+            frame.AddrFrame.Mode = super::ADDRESS_MODE::AddrModeFlat;
             super::IMAGE_FILE_MACHINE_I386
         }
     }
@@ -903,11 +906,11 @@ mod imp {
         pub fn init_frame(frame: &mut super::STACKFRAME64,
                           ctx: &CONTEXT) -> DWORD {
             frame.AddrPC.Offset = ctx.Rip as u64;
-            frame.AddrPC.Mode = super::AddrModeFlat;
+            frame.AddrPC.Mode = super::ADDRESS_MODE::AddrModeFlat;
             frame.AddrStack.Offset = ctx.Rsp as u64;
-            frame.AddrStack.Mode = super::AddrModeFlat;
+            frame.AddrStack.Mode = super::ADDRESS_MODE::AddrModeFlat;
             frame.AddrFrame.Offset = ctx.Rbp as u64;
-            frame.AddrFrame.Mode = super::AddrModeFlat;
+            frame.AddrFrame.Mode = super::ADDRESS_MODE::AddrModeFlat;
             super::IMAGE_FILE_MACHINE_AMD64
         }
     }