auto merge of #20393 : japaric/rust/impl-any, r=aturon

Needs a snapshot that contains PR #20385

r? @aturon

src/liballoc/boxed.rs

@@ -12,7 +12,7 @@
 
 #![stable]
 
-use core::any::{Any, AnyRefExt};
+use core::any::Any;
 use core::clone::Clone;
 use core::cmp::{PartialEq, PartialOrd, Eq, Ord, Ordering};
 use core::default::Default;

src/libcore/any.rs

@@ -35,7 +35,7 @@
 //!
 //! ```rust
 //! use std::fmt::Show;
-//! use std::any::{Any, AnyRefExt};
+//! use std::any::Any;
 //!
 //! // Logger function for any type that implements Show.
 //! fn log<T: Any+Show>(value: &T) {
@@ -102,24 +102,11 @@ impl<T: 'static> Any for T {
 // Implemented as three extension traits so that the methods can be generic.
 ///////////////////////////////////////////////////////////////////////////////
 
-/// Extension methods for a referenced `Any` trait object
-#[unstable = "this trait will not be necessary once DST lands, it will be a \
-              part of `impl Any`"]
-pub trait AnyRefExt<'a> {
+impl Any {
     /// Returns true if the boxed type is the same as `T`
     #[stable]
-    fn is<T: 'static>(self) -> bool;
-
-    /// Returns some reference to the boxed value if it is of type `T`, or
-    /// `None` if it isn't.
-    #[unstable = "naming conventions around acquiring references may change"]
-    fn downcast_ref<T: 'static>(self) -> Option<&'a T>;
-}
-
-#[stable]
-impl<'a> AnyRefExt<'a> for &'a Any {
     #[inline]
-    fn is<T: 'static>(self) -> bool {
+    pub fn is<T: 'static>(&self) -> bool {
         // Get TypeId of the type this function is instantiated with
         let t = TypeId::of::<T>();
 
@@ -130,8 +117,11 @@ impl<'a> AnyRefExt<'a> for &'a Any {
         t == boxed
     }
 
+    /// Returns some reference to the boxed value if it is of type `T`, or
+    /// `None` if it isn't.
+    #[unstable = "naming conventions around acquiring references may change"]
     #[inline]
-    fn downcast_ref<T: 'static>(self) -> Option<&'a T> {
+    pub fn downcast_ref<'a, T: 'static>(&'a self) -> Option<&'a T> {
         if self.is::<T>() {
             unsafe {
                 // Get the raw representation of the trait object
@@ -144,22 +134,12 @@ impl<'a> AnyRefExt<'a> for &'a Any {
             None
         }
     }
-}
 
-/// Extension methods for a mutable referenced `Any` trait object
-#[unstable = "this trait will not be necessary once DST lands, it will be a \
-              part of `impl Any`"]
-pub trait AnyMutRefExt<'a> {
     /// Returns some mutable reference to the boxed value if it is of type `T`, or
     /// `None` if it isn't.
     #[unstable = "naming conventions around acquiring references may change"]
-    fn downcast_mut<T: 'static>(self) -> Option<&'a mut T>;
-}
-
-#[stable]
-impl<'a> AnyMutRefExt<'a> for &'a mut Any {
     #[inline]
-    fn downcast_mut<T: 'static>(self) -> Option<&'a mut T> {
+    pub fn downcast_mut<'a, T: 'static>(&'a mut self) -> Option<&'a mut T> {
         if self.is::<T>() {
             unsafe {
                 // Get the raw representation of the trait object

src/librustc_driver/lib.rs

@@ -54,7 +54,6 @@ use rustc::lint;
 use rustc::metadata;
 use rustc::DIAGNOSTICS;
 
-use std::any::AnyRefExt;
 use std::cmp::Ordering::Equal;
 use std::io;
 use std::iter::repeat;

src/libstd/failure.rs

@@ -12,7 +12,7 @@
 
 use prelude::v1::*;
 
-use any::{Any, AnyRefExt};
+use any::Any;
 use cell::RefCell;
 use io::IoResult;
 use rt::{backtrace, unwind};

src/libstd/thread.rs

@@ -435,7 +435,7 @@ impl<T: Send> Drop for JoinGuard<T> {
 mod test {
     use prelude::v1::*;
 
-    use any::{Any, AnyRefExt};
+    use any::Any;
     use sync::mpsc::{channel, Sender};
     use boxed::BoxAny;
     use result;

src/libtest/lib.rs

@@ -58,7 +58,7 @@ use serialize::{json, Decodable, Encodable};
 use term::Terminal;
 use term::color::{Color, RED, YELLOW, GREEN, CYAN};
 
-use std::any::{Any, AnyRefExt};
+use std::any::Any;
 use std::cmp;
 use std::collections::BTreeMap;
 use std::f64;

src/test/compile-fail/kindck-inherited-copy-bound.rs

@@ -11,7 +11,6 @@
 // Test that Copy bounds inherited by trait are checked.
 
 use std::any::Any;
-use std::any::AnyRefExt;
 
 trait Foo : Copy {
 }

src/test/run-pass/object-one-type-two-traits.rs

@@ -12,7 +12,6 @@
 // traits.
 
 use std::any::Any;
-use std::any::AnyRefExt;
 
 trait Wrap {
     fn get(&self) -> int;