Auto merge of #29952 - petrochenkov:depr, r=brson

Part of #29935

The deprecation lint is still called "deprecated", so people can continue using `#[allow(deprecated)]` and similar things.

Author: bors

src/doc/reference.md

@@ -2327,7 +2327,7 @@ The currently implemented features of the reference compiler are:
 
 * `staged_api` - Allows usage of stability markers and `#![staged_api]` in a
                  crate. Stability markers are also attributes: `#[stable]`,
-                 `#[unstable]`, and `#[deprecated]` are the three levels.
+                 `#[unstable]`, and `#[rustc_deprecated]` are the three levels.
 
 * `start` - Allows use of the `#[start]` attribute, which changes the entry point
             into a Rust program. This capability, especially the signature for the

src/etc/featureck.py

@@ -206,7 +206,7 @@
         lang_stable_since = language_feature_stats[name][4]
         lib_stable_since = lib_feature_stats[name][4]
 
-        if lang_status != lib_status and lib_status != "deprecated":
+        if lang_status != lib_status and lib_status != "rustc_deprecated":
             print("error: feature '%s' has lang status %s " +
                   "but lib status %s" % (name, lang_status, lib_status))
             errors = True

src/liballoc/arc.rs

@@ -385,7 +385,7 @@ impl<T: ?Sized> Deref for Arc<T> {
 impl<T: Clone> Arc<T> {
     #[unstable(feature = "arc_make_unique", reason = "renamed to Arc::make_mut",
                issue = "27718")]
-    #[deprecated(since = "1.4.0", reason = "renamed to Arc::make_mut")]
+    #[rustc_deprecated(since = "1.4.0", reason = "renamed to Arc::make_mut")]
     pub fn make_unique(this: &mut Self) -> &mut T {
         Arc::make_mut(this)
     }

src/liballoc/lib.rs

@@ -74,6 +74,8 @@
 #![no_std]
 #![cfg_attr(not(stage0), needs_allocator)]
 
+#![cfg_attr(stage0, feature(rustc_attrs))]
+#![cfg_attr(stage0, allow(unused_attributes))]
 #![feature(allocator)]
 #![feature(box_syntax)]
 #![feature(coerce_unsized)]

src/liballoc/rc.rs

@@ -362,7 +362,7 @@ impl<T: Clone> Rc<T> {
     #[inline]
     #[unstable(feature = "rc_make_unique", reason = "renamed to Rc::make_mut",
                issue = "27718")]
-    #[deprecated(since = "1.4.0", reason = "renamed to Rc::make_mut")]
+    #[rustc_deprecated(since = "1.4.0", reason = "renamed to Rc::make_mut")]
     pub fn make_unique(&mut self) -> &mut T {
         Rc::make_mut(self)
     }

src/libcollections/binary_heap.rs

@@ -241,7 +241,7 @@ impl<T: Ord> BinaryHeap<T> {
     #[unstable(feature = "binary_heap_extras",
                reason = "needs to be audited",
                issue = "28147")]
-    #[deprecated(since = "1.5.0", reason = "use BinaryHeap::from instead")]
+    #[rustc_deprecated(since = "1.5.0", reason = "use BinaryHeap::from instead")]
     pub fn from_vec(vec: Vec<T>) -> BinaryHeap<T> {
         BinaryHeap::from(vec)
     }

src/libcollections/btree/map.rs

@@ -161,7 +161,7 @@ impl<K: Ord, V> BTreeMap<K, V> {
     #[unstable(feature = "btree_b",
                reason = "probably want this to be on the type, eventually",
                issue = "27795")]
-    #[deprecated(since = "1.4.0", reason = "niche API")]
+    #[rustc_deprecated(since = "1.4.0", reason = "niche API")]
     pub fn with_b(b: usize) -> BTreeMap<K, V> {
         assert!(b > 1, "B must be greater than 1");
         BTreeMap {

src/libcollections/btree/set.rs

@@ -105,7 +105,7 @@ impl<T: Ord> BTreeSet<T> {
     #[unstable(feature = "btree_b",
                reason = "probably want this to be on the type, eventually",
                issue = "27795")]
-    #[deprecated(since = "1.4.0", reason = "niche API")]
+    #[rustc_deprecated(since = "1.4.0", reason = "niche API")]
     #[allow(deprecated)]
     pub fn with_b(b: usize) -> BTreeSet<T> {
         BTreeSet { map: BTreeMap::with_b(b) }

src/libcollections/lib.rs

@@ -37,6 +37,8 @@
 // SNAP 1af31d4
 #![allow(unused_attributes)]
 
+#![cfg_attr(stage0, feature(rustc_attrs))]
+#![cfg_attr(stage0, allow(unused_attributes))]
 #![feature(alloc)]
 #![feature(box_patterns)]
 #![feature(box_syntax)]

src/libcollections/slice.rs

@@ -862,7 +862,7 @@ pub trait SliceConcatExt<T: ?Sized> {
     /// assert_eq!(["hello", "world"].connect(" "), "hello world");
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[deprecated(since = "1.3.0", reason = "renamed to join")]
+    #[rustc_deprecated(since = "1.3.0", reason = "renamed to join")]
     fn connect(&self, sep: &T) -> Self::Output;
 }