auto merge of #13184 : alexcrichton/rust/priv-fields, r=brson

This is an implementation of a portion of [RFC #4](https://github.com/rust-lang/rfcs/blob/master/active/0004-private-fields.md). This PR makes named struct fields private by default (as opposed to inherited by default).

The only real meaty change is the first commit to `rustc`, all other commits are just fallout of that change.

Summary of changes made:

* Named fields are private by default *everywhere*
* The `priv` keyword is now default-deny on named fields (done in a "lint" pass in privacy)

Changes yet to be done (before the RFC is closed)

* Change tuple structs to have private fields by default
* Remove `priv` enum variants
* Make `priv` a reserved keyword

1 files changed, 4 insertions, 4 deletions

diff --git a/src/libgreen/stack.rs b/src/libgreen/stack.rs
index 053d73c010e..497c1dc664a 100644
--- a/src/libgreen/stack.rs
+++ b/src/libgreen/stack.rs
@@ -15,9 +15,9 @@ use std::libc;
 
 /// A task's stack. The name "Stack" is a vestige of segmented stacks.
 pub struct Stack {
-    priv buf: MemoryMap,
-    priv min_size: uint,
-    priv valgrind_id: libc::c_uint,
+    buf: MemoryMap,
+    min_size: uint,
+    valgrind_id: libc::c_uint,
 }
 
 // Try to use MAP_STACK on platforms that support it (it's what we're doing
@@ -126,7 +126,7 @@ impl Drop for Stack {
 pub struct StackPool {
     // Ideally this would be some datastructure that preserved ordering on
     // Stack.min_size.
-    priv stacks: ~[Stack],
+    stacks: ~[Stack],
 }
 
 impl StackPool {