Stabilize rc_raw feature, closes rust-lang#37197

Author: aturon

src/liballoc/arc.rs

@@ -287,17 +287,15 @@ impl<T> Arc<T> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(rc_raw)]
-    ///
     /// use std::sync::Arc;
     ///
     /// let x = Arc::new(10);
     /// let x_ptr = Arc::into_raw(x);
     /// assert_eq!(unsafe { *x_ptr }, 10);
     /// ```
-    #[unstable(feature = "rc_raw", issue = "37197")]
-    pub fn into_raw(this: Self) -> *mut T {
-        let ptr = unsafe { &mut (**this.ptr).data as *mut _ };
+    #[stable(feature = "rc_raw", since = "1.17.0")]
+    pub fn into_raw(this: Self) -> *const T {
+        let ptr = unsafe { &(**this.ptr).data as *const _ };
         mem::forget(this);
         ptr
     }
@@ -315,8 +313,6 @@ impl<T> Arc<T> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(rc_raw)]
-    ///
     /// use std::sync::Arc;
     ///
     /// let x = Arc::new(10);
@@ -332,11 +328,11 @@ impl<T> Arc<T> {
     ///
     /// // The memory was freed when `x` went out of scope above, so `x_ptr` is now dangling!
     /// ```
-    #[unstable(feature = "rc_raw", issue = "37197")]
-    pub unsafe fn from_raw(ptr: *mut T) -> Self {
+    #[stable(feature = "rc_raw", since = "1.17.0")]
+    pub unsafe fn from_raw(ptr: *const T) -> Self {
         // To find the corresponding pointer to the `ArcInner` we need to subtract the offset of the
         // `data` field from the pointer.
-        Arc { ptr: Shared::new((ptr as *mut u8).offset(-offset_of!(ArcInner<T>, data)) as *mut _) }
+        Arc { ptr: Shared::new((ptr as *const u8).offset(-offset_of!(ArcInner<T>, data)) as *const _) }
     }
 }
 
@@ -448,7 +444,7 @@ impl<T: ?Sized> Arc<T> {
     // Non-inlined part of `drop`.
     #[inline(never)]
     unsafe fn drop_slow(&mut self) {
-        let ptr = *self.ptr;
+        let ptr = self.ptr.as_mut_ptr();
 
         // Destroy the data at this time, even though we may not free the box
         // allocation itself (there may still be weak pointers lying around).
@@ -624,7 +620,7 @@ impl<T: Clone> Arc<T> {
         // As with `get_mut()`, the unsafety is ok because our reference was
         // either unique to begin with, or became one upon cloning the contents.
         unsafe {
-            let inner = &mut **this.ptr;
+            let inner = &mut *this.ptr.as_mut_ptr();
             &mut inner.data
         }
     }
@@ -667,7 +663,7 @@ impl<T: ?Sized> Arc<T> {
             // the Arc itself to be `mut`, so we're returning the only possible
             // reference to the inner data.
             unsafe {
-                let inner = &mut **this.ptr;
+                let inner = &mut *this.ptr.as_mut_ptr();
                 Some(&mut inner.data)
             }
         } else {

src/liballoc/rc.rs

@@ -364,17 +364,15 @@ impl<T> Rc<T> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(rc_raw)]
-    ///
     /// use std::rc::Rc;
     ///
     /// let x = Rc::new(10);
     /// let x_ptr = Rc::into_raw(x);
     /// assert_eq!(unsafe { *x_ptr }, 10);
     /// ```
-    #[unstable(feature = "rc_raw", issue = "37197")]
-    pub fn into_raw(this: Self) -> *mut T {
-        let ptr = unsafe { &mut (**this.ptr).value as *mut _ };
+    #[stable(feature = "rc_raw", since = "1.17.0")]
+    pub fn into_raw(this: Self) -> *const T {
+        let ptr = unsafe { &mut (*this.ptr.as_mut_ptr()).value as *const _ };
         mem::forget(this);
         ptr
     }
@@ -392,8 +390,6 @@ impl<T> Rc<T> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(rc_raw)]
-    ///
     /// use std::rc::Rc;
     ///
     /// let x = Rc::new(10);
@@ -409,11 +405,11 @@ impl<T> Rc<T> {
     ///
     /// // The memory was freed when `x` went out of scope above, so `x_ptr` is now dangling!
     /// ```
-    #[unstable(feature = "rc_raw", issue = "37197")]
-    pub unsafe fn from_raw(ptr: *mut T) -> Self {
+    #[stable(feature = "rc_raw", since = "1.17.0")]
+    pub unsafe fn from_raw(ptr: *const T) -> Self {
         // To find the corresponding pointer to the `RcBox` we need to subtract the offset of the
         // `value` field from the pointer.
-        Rc { ptr: Shared::new((ptr as *mut u8).offset(-offset_of!(RcBox<T>, value)) as *mut _) }
+        Rc { ptr: Shared::new((ptr as *const u8).offset(-offset_of!(RcBox<T>, value)) as *const _) }
     }
 }
 
@@ -543,7 +539,7 @@ impl<T: ?Sized> Rc<T> {
     #[stable(feature = "rc_unique", since = "1.4.0")]
     pub fn get_mut(this: &mut Self) -> Option<&mut T> {
         if Rc::is_unique(this) {
-            let inner = unsafe { &mut **this.ptr };
+            let inner = unsafe { &mut *this.ptr.as_mut_ptr() };
             Some(&mut inner.value)
         } else {
             None
@@ -627,7 +623,7 @@ impl<T: Clone> Rc<T> {
         // reference count is guaranteed to be 1 at this point, and we required
         // the `Rc<T>` itself to be `mut`, so we're returning the only possible
         // reference to the inner value.
-        let inner = unsafe { &mut **this.ptr };
+        let inner = unsafe { &mut *this.ptr.as_mut_ptr() };
         &mut inner.value
     }
 }
@@ -673,7 +669,7 @@ unsafe impl<#[may_dangle] T: ?Sized> Drop for Rc<T> {
     /// ```
     fn drop(&mut self) {
         unsafe {
-            let ptr = *self.ptr;
+            let ptr = self.ptr.as_mut_ptr();
 
             self.dec_strong();
             if self.strong() == 0 {

src/libcollections/lib.rs

@@ -133,10 +133,13 @@ mod std {
 #[derive(Clone, Copy, Debug, Hash, PartialEq, Eq)]
 pub enum Bound<T> {
     /// An inclusive bound.
+    #[stable(feature = "collections_bound", since = "1.17.0")]
     Included(T),
     /// An exclusive bound.
+    #[stable(feature = "collections_bound", since = "1.17.0")]
     Excluded(T),
     /// An infinite endpoint. Indicates that there is no bound in this direction.
+    #[stable(feature = "collections_bound", since = "1.17.0")]
     Unbounded,
 }
 

src/libcollections/linked_list.rs

@@ -142,7 +142,7 @@ impl<T> LinkedList<T> {
 
             match self.head {
                 None => self.tail = node,
-                Some(head) => (**head).prev = node,
+                Some(head) => (*head.as_mut_ptr()).prev = node,
             }
 
             self.head = node;
@@ -154,12 +154,12 @@ impl<T> LinkedList<T> {
     #[inline]
     fn pop_front_node(&mut self) -> Option<Box<Node<T>>> {
         self.head.map(|node| unsafe {
-            let node = Box::from_raw(*node);
+            let node = Box::from_raw(node.as_mut_ptr());
             self.head = node.next;
 
             match self.head {
                 None => self.tail = None,
-                Some(head) => (**head).prev = None,
+                Some(head) => (*head.as_mut_ptr()).prev = None,
             }
 
             self.len -= 1;
@@ -177,7 +177,7 @@ impl<T> LinkedList<T> {
 
             match self.tail {
                 None => self.head = node,
-                Some(tail) => (**tail).next = node,
+                Some(tail) => (*tail.as_mut_ptr()).next = node,
             }
 
             self.tail = node;
@@ -189,12 +189,12 @@ impl<T> LinkedList<T> {
     #[inline]
     fn pop_back_node(&mut self) -> Option<Box<Node<T>>> {
         self.tail.map(|node| unsafe {
-            let node = Box::from_raw(*node);
+            let node = Box::from_raw(node.as_mut_ptr());
             self.tail = node.prev;
 
             match self.tail {
                 None => self.head = None,
-                Some(tail) => (**tail).next = None,
+                Some(tail) => (*tail.as_mut_ptr()).next = None,
             }
 
             self.len -= 1;
@@ -269,8 +269,8 @@ impl<T> LinkedList<T> {
             Some(tail) => {
                 if let Some(other_head) = other.head.take() {
                     unsafe {
-                        (**tail).next = Some(other_head);
-                        (**other_head).prev = Some(tail);
+                        (*tail.as_mut_ptr()).next = Some(other_head);
+                        (*other_head.as_mut_ptr()).prev = Some(tail);
                     }
 
                     self.tail = other.tail.take();
@@ -484,7 +484,7 @@ impl<T> LinkedList<T> {
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
     pub fn front_mut(&mut self) -> Option<&mut T> {
-        self.head.map(|node| unsafe { &mut (**node).element })
+        self.head.map(|node| unsafe { &mut (*node.as_mut_ptr()).element })
     }
 
     /// Provides a reference to the back element, or `None` if the list is
@@ -530,7 +530,7 @@ impl<T> LinkedList<T> {
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
     pub fn back_mut(&mut self) -> Option<&mut T> {
-        self.tail.map(|node| unsafe { &mut (**node).element })
+        self.tail.map(|node| unsafe { &mut (*node.as_mut_ptr()).element })
     }
 
     /// Adds an element first in the list.
@@ -675,9 +675,9 @@ impl<T> LinkedList<T> {
         let second_part_head;
 
         unsafe {
-            second_part_head = (**split_node.unwrap()).next.take();
+            second_part_head = (*split_node.unwrap().as_mut_ptr()).next.take();
             if let Some(head) = second_part_head {
-                (**head).prev = None;
+                (*head.as_mut_ptr()).prev = None;
             }
         }
 
@@ -816,7 +816,7 @@ impl<'a, T> Iterator for IterMut<'a, T> {
             None
         } else {
             self.head.map(|node| unsafe {
-                let node = &mut **node;
+                let node = &mut *node.as_mut_ptr();
                 self.len -= 1;
                 self.head = node.next;
                 &mut node.element
@@ -838,7 +838,7 @@ impl<'a, T> DoubleEndedIterator for IterMut<'a, T> {
             None
         } else {
             self.tail.map(|node| unsafe {
-                let node = &mut **node;
+                let node = &mut *node.as_mut_ptr();
                 self.len -= 1;
                 self.tail = node.prev;
                 &mut node.element
@@ -896,8 +896,8 @@ impl<'a, T> IterMut<'a, T> {
                     element: element,
                 })));
 
-                (**prev).next = node;
-                (**head).prev = node;
+                (*prev.as_mut_ptr()).next = node;
+                (*head.as_mut_ptr()).prev = node;
 
                 self.list.len += 1;
             },
@@ -929,7 +929,7 @@ impl<'a, T> IterMut<'a, T> {
         if self.len == 0 {
             None
         } else {
-            self.head.map(|node| unsafe { &mut (**node).element })
+            self.head.map(|node| unsafe { &mut (*node.as_mut_ptr()).element })
         }
     }
 }

src/libcollections/vec.rs

@@ -2120,7 +2120,7 @@ unsafe impl<#[may_dangle] T> Drop for IntoIter<T> {
         for _x in self.by_ref() {}
 
         // RawVec handles deallocation
-        let _ = unsafe { RawVec::from_raw_parts(*self.buf, self.cap) };
+        let _ = unsafe { RawVec::from_raw_parts(self.buf.as_mut_ptr(), self.cap) };
     }
 }
 
@@ -2185,7 +2185,7 @@ impl<'a, T> Drop for Drain<'a, T> {
 
         if self.tail_len > 0 {
             unsafe {
-                let source_vec = &mut **self.vec;
+                let source_vec = &mut *self.vec.as_mut_ptr();
                 // memmove back untouched tail, update to new length
                 let start = source_vec.len();
                 let tail = self.tail_start;

src/libcollections/vec_deque.rs

@@ -2125,7 +2125,7 @@ impl<'a, T: 'a> Drop for Drain<'a, T> {
     fn drop(&mut self) {
         for _ in self.by_ref() {}
 
-        let source_deque = unsafe { &mut **self.deque };
+        let source_deque = unsafe { &mut *self.deque.as_mut_ptr() };
 
         // T = source_deque_tail; H = source_deque_head; t = drain_tail; h = drain_head
         //

src/libcore/ptr.rs

@@ -968,11 +968,19 @@ impl<T: ?Sized> Shared<T> {
     /// # Safety
     ///
     /// `ptr` must be non-null.
-    pub unsafe fn new(ptr: *mut T) -> Self {
+    pub unsafe fn new(ptr: *const T) -> Self {
         Shared { pointer: NonZero::new(ptr), _marker: PhantomData }
     }
 }
 
+#[unstable(feature = "shared", issue = "27730")]
+impl<T: ?Sized> Shared<T> {
+    /// Acquires the underlying pointer as a `*mut` pointer.
+    pub unsafe fn as_mut_ptr(&self) -> *mut T {
+        **self as _
+    }
+}
+
 #[unstable(feature = "shared", issue = "27730")]
 impl<T: ?Sized> Clone for Shared<T> {
     fn clone(&self) -> Self {
@@ -988,10 +996,10 @@ impl<T: ?Sized, U: ?Sized> CoerceUnsized<Shared<U>> for Shared<T> where T: Unsiz
 
 #[unstable(feature = "shared", issue = "27730")]
 impl<T: ?Sized> Deref for Shared<T> {
-    type Target = *mut T;
+    type Target = *const T;
 
     #[inline]
-    fn deref(&self) -> &*mut T {
+    fn deref(&self) -> &*const T {
         unsafe { mem::transmute(&*self.pointer) }
     }
 }

src/librustc_data_structures/array_vec.rs

@@ -248,7 +248,7 @@ impl<'a, A: Array> Drop for Drain<'a, A> {
 
         if self.tail_len > 0 {
             unsafe {
-                let source_array_vec = &mut **self.array_vec;
+                let source_array_vec = &mut *self.array_vec.as_mut_ptr();
                 // memmove back untouched tail, update to new length
                 let start = source_array_vec.len();
                 let tail = self.tail_start;
@@ -317,4 +317,3 @@ impl<T> Default for ManuallyDrop<T> {
         ManuallyDrop::new()
     }
 }
-

src/librustc_data_structures/lib.rs

@@ -27,7 +27,6 @@
 
 #![feature(shared)]
 #![feature(collections_range)]
-#![feature(collections_bound)]
 #![cfg_attr(stage0,feature(field_init_shorthand))]
 #![feature(nonzero)]
 #![feature(rustc_private)]

src/libstd/collections/hash/table.rs

@@ -1154,7 +1154,7 @@ impl<'a, K, V> Iterator for Drain<'a, K, V> {
     fn next(&mut self) -> Option<(SafeHash, K, V)> {
         self.iter.next().map(|bucket| {
             unsafe {
-                (**self.table).size -= 1;
+                (*self.table.as_mut_ptr()).size -= 1;
                 let (k, v) = ptr::read(bucket.pair);
                 (SafeHash { hash: ptr::replace(bucket.hash, EMPTY_BUCKET) }, k, v)
             }

src/libstd/lib.rs

@@ -245,7 +245,6 @@
 #![feature(char_escape_debug)]
 #![feature(char_internals)]
 #![feature(collections)]
-#![feature(collections_bound)]
 #![feature(collections_range)]
 #![feature(compiler_builtins_lib)]
 #![feature(const_fn)]