Auto merge of #30187 - alexcrichton:stabilize-1.6, r=aturon

This commit is the standard API stabilization commit for the 1.6 release cycle.
The list of issues and APIs below have all been through their cycle-long FCP and
the libs team decisions are listed below

Stabilized APIs

* `Read::read_exact`
* `ErrorKind::UnexpectedEof` (renamed from `UnexpectedEOF`)
* libcore -- this was a bit of a nuanced stabilization, the crate itself is now
  marked as `#[stable]` and the methods appearing via traits for primitives like
  `char` and `str` are now also marked as stable. Note that the extension traits
  themeselves are marked as unstable as they're imported via the prelude. The
  `try!` macro was also moved from the standard library into libcore to have the
  same interface. Otherwise the functions all have copied stability from the
  standard library now.
* `fs::DirBuilder`
* `fs::DirBuilder::new`
* `fs::DirBuilder::recursive`
* `fs::DirBuilder::create`
* `os::unix::fs::DirBuilderExt`
* `os::unix::fs::DirBuilderExt::mode`
* `vec::Drain`
* `vec::Vec::drain`
* `string::Drain`
* `string::String::drain`
* `vec_deque::Drain`
* `vec_deque::VecDeque::drain`
* `collections::hash_map::Drain`
* `collections::hash_map::HashMap::drain`
* `collections::hash_set::Drain`
* `collections::hash_set::HashSet::drain`
* `collections::binary_heap::Drain`
* `collections::binary_heap::BinaryHeap::drain`
* `Vec::extend_from_slice` (renamed from `push_all`)
* `Mutex::get_mut`
* `Mutex::into_inner`
* `RwLock::get_mut`
* `RwLock::into_inner`
* `Iterator::min_by_key` (renamed from `min_by`)
* `Iterator::max_by_key` (renamed from `max_by`)

Deprecated APIs

* `ErrorKind::UnexpectedEOF` (renamed to `UnexpectedEof`)
* `OsString::from_bytes`
* `OsStr::to_cstring`
* `OsStr::to_bytes`
* `fs::walk_dir` and `fs::WalkDir`
* `path::Components::peek`
* `slice::bytes::MutableByteVector`
* `slice::bytes::copy_memory`
* `Vec::push_all` (renamed to `extend_from_slice`)
* `Duration::span`
* `IpAddr`
* `SocketAddr::ip`
* `Read::tee`
* `io::Tee`
* `Write::broadcast`
* `io::Broadcast`
* `Iterator::min_by` (renamed to `min_by_key`)
* `Iterator::max_by` (renamed to `max_by_key`)
* `net::lookup_addr`

New APIs (still unstable)

* `<[T]>::sort_by_key` (added to mirror `min_by_key`)

Closes #27585
Closes #27704
Closes #27707
Closes #27710
Closes #27711
Closes #27727
Closes #27740
Closes #27744
Closes #27799
Closes #27801
cc #27801 (doesn't close as `Chars` is still unstable)
Closes #28968

4 files changed, 8 insertions, 13 deletions

diff --git a/src/libsyntax/ext/quote.rs b/src/libsyntax/ext/quote.rs
index fc6cacb40f1..496f6a429a3 100644
--- a/src/libsyntax/ext/quote.rs
+++ b/src/libsyntax/ext/quote.rs
@@ -178,7 +178,7 @@ pub mod rt {
                     let mut v = vec![];
                     for (i, x) in self.iter().enumerate() {
                         if i > 0 {
-                            v.push_all(&$sep);
+                            v.extend_from_slice(&$sep);
                         }
                         v.extend(x.to_tokens(cx));
                     }
diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs
index e00c3e3bea4..c456b7dc8b9 100644
--- a/src/libsyntax/feature_gate.rs
+++ b/src/libsyntax/feature_gate.rs
@@ -132,7 +132,7 @@ const KNOWN_FEATURES: &'static [(&'static str, &'static str, Option<u32>, Status
     ("unmarked_api", "1.0.0", None, Active),
 
     // Allows using #![no_std]
-    ("no_std", "1.0.0", Some(27701), Active),
+    ("no_std", "1.0.0", None, Accepted),
 
     // Allows using #![no_core]
     ("no_core", "1.3.0", Some(29639), Active),
@@ -286,8 +286,7 @@ pub const KNOWN_ATTRIBUTES: &'static [(&'static str, AttributeType, AttributeGat
     ("plugin", CrateLevel, Gated("plugin",
                                  "compiler plugins are experimental \
                                   and possibly buggy")),
-    ("no_std", CrateLevel, Gated("no_std",
-                                 "no_std is experimental")),
+    ("no_std", CrateLevel, Ungated),
     ("no_core", CrateLevel, Gated("no_core",
                                   "no_core is experimental")),
     ("lang", Normal, Gated("lang_items",
diff --git a/src/libsyntax/lib.rs b/src/libsyntax/lib.rs
index 9401999465b..4498120a78f 100644
--- a/src/libsyntax/lib.rs
+++ b/src/libsyntax/lib.rs
@@ -29,7 +29,6 @@
 #![cfg_attr(stage0, feature(rustc_attrs))]
 #![cfg_attr(stage0, allow(unused_attributes))]
 #![feature(associated_consts)]
-#![feature(drain)]
 #![feature(filling_drop)]
 #![feature(libc)]
 #![feature(rustc_private)]
@@ -37,7 +36,6 @@
 #![feature(str_char)]
 #![feature(str_escape)]
 #![feature(unicode)]
-#![feature(vec_push_all)]
 
 extern crate fmt_macros;
 extern crate serialize;
diff --git a/src/libsyntax/print/pprust.rs b/src/libsyntax/print/pprust.rs
index aa55cb847fa..f7105951296 100644
--- a/src/libsyntax/print/pprust.rs
+++ b/src/libsyntax/print/pprust.rs
@@ -120,17 +120,15 @@ pub fn print_crate<'a>(cm: &'a CodeMap,
         // However we don't want these attributes in the AST because
         // of the feature gate, so we fake them up here.
 
-        let no_std_meta = attr::mk_word_item(InternedString::new("no_std"));
+        // #![feature(prelude_import)]
         let prelude_import_meta = attr::mk_word_item(InternedString::new("prelude_import"));
-
-        // #![feature(no_std)]
-        let fake_attr = attr::mk_attr_inner(attr::mk_attr_id(),
-                                            attr::mk_list_item(InternedString::new("feature"),
-                                                               vec![no_std_meta.clone(),
-                                                                    prelude_import_meta]));
+        let list = attr::mk_list_item(InternedString::new("feature"),
+                                      vec![prelude_import_meta]);
+        let fake_attr = attr::mk_attr_inner(attr::mk_attr_id(), list);
         try!(s.print_attribute(&fake_attr));
 
         // #![no_std]
+        let no_std_meta = attr::mk_word_item(InternedString::new("no_std"));
         let fake_attr = attr::mk_attr_inner(attr::mk_attr_id(), no_std_meta);
         try!(s.print_attribute(&fake_attr));
     }