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, 8 insertions, 8 deletions

diff --git a/src/libstd/task.rs b/src/libstd/task.rs
index c3d02236948..a3d919921ae 100644
--- a/src/libstd/task.rs
+++ b/src/libstd/task.rs
@@ -60,15 +60,15 @@ pub type TaskResult = Result<(), ~Any:Send>;
 /// Task configuration options
 pub struct TaskOpts {
     /// Enable lifecycle notifications on the given channel
-    notify_chan: Option<Sender<TaskResult>>,
+    pub notify_chan: Option<Sender<TaskResult>>,
     /// A name for the task-to-be, for identification in failure messages
-    name: Option<SendStr>,
+    pub name: Option<SendStr>,
     /// The size of the stack for the spawned task
-    stack_size: Option<uint>,
+    pub stack_size: Option<uint>,
     /// Task-local stdout
-    stdout: Option<~Writer:Send>,
+    pub stdout: Option<~Writer:Send>,
     /// Task-local stderr
-    stderr: Option<~Writer:Send>,
+    pub stderr: Option<~Writer:Send>,
 }
 
 /**
@@ -85,9 +85,9 @@ pub struct TaskOpts {
 // the run function move them in.
 pub struct TaskBuilder {
     /// Options to spawn the new task with
-    opts: TaskOpts,
-    priv gen_body: Option<proc:Send(v: proc:Send()) -> proc:Send()>,
-    priv nocopy: Option<marker::NoCopy>,
+    pub opts: TaskOpts,
+    gen_body: Option<proc:Send(v: proc:Send()) -> proc:Send()>,
+    nocopy: Option<marker::NoCopy>,
 }
 
 /**