std: Stabilize APIs for the 1.6 release

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.
* The `#![no_std]` attribute
* `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

1 files changed, 23 insertions, 29 deletions

diff --git a/src/libtest/lib.rs b/src/libtest/lib.rs
index 71eddd80c74..7ffe567ac83 100644
--- a/src/libtest/lib.rs
+++ b/src/libtest/lib.rs
@@ -37,13 +37,12 @@
 
 #![feature(asm)]
 #![feature(box_syntax)]
-#![feature(duration_span)]
 #![feature(fnbox)]
-#![feature(iter_cmp)]
 #![feature(libc)]
 #![feature(rustc_private)]
 #![feature(set_stdio)]
 #![feature(staged_api)]
+#![feature(time2)]
 
 extern crate getopts;
 extern crate serialize;
@@ -79,7 +78,7 @@ use std::path::PathBuf;
 use std::sync::mpsc::{channel, Sender};
 use std::sync::{Arc, Mutex};
 use std::thread;
-use std::time::Duration;
+use std::time::{Instant, Duration};
 
 // to be used by rustc to compile tests in libtest
 pub mod test {
@@ -714,7 +713,7 @@ pub fn run_tests_console(opts: &TestOpts, tests: Vec<TestDescAndFn> ) -> io::Res
             PadOnRight => t.desc.name.as_slice().len(),
         }
     }
-    match tests.iter().max_by(|t|len_if_padded(*t)) {
+    match tests.iter().max_by_key(|t|len_if_padded(*t)) {
         Some(t) => {
             let n = t.desc.name.as_slice();
             st.max_name_len = n.len();
@@ -1121,12 +1120,12 @@ pub fn black_box<T>(dummy: T) -> T { dummy }
 impl Bencher {
     /// Callback for benchmark functions to run in their body.
     pub fn iter<T, F>(&mut self, mut inner: F) where F: FnMut() -> T {
-        self.dur = Duration::span(|| {
-            let k = self.iterations;
-            for _ in 0..k {
-                black_box(inner());
-            }
-        });
+        let start = Instant::now();
+        let k = self.iterations;
+        for _ in 0..k {
+            black_box(inner());
+        }
+        self.dur = start.elapsed();
     }
 
     pub fn ns_elapsed(&mut self) -> u64 {
@@ -1169,29 +1168,24 @@ impl Bencher {
         let mut total_run = Duration::new(0, 0);
         let samples : &mut [f64] = &mut [0.0_f64; 50];
         loop {
-            let mut summ = None;
-            let mut summ5 = None;
+            let loop_start = Instant::now();
 
-            let loop_run = Duration::span(|| {
-
-                for p in &mut *samples {
-                    self.bench_n(n, |x| f(x));
-                    *p = self.ns_per_iter() as f64;
-                };
+            for p in &mut *samples {
+                self.bench_n(n, |x| f(x));
+                *p = self.ns_per_iter() as f64;
+            };
 
-                stats::winsorize(samples, 5.0);
-                summ = Some(stats::Summary::new(samples));
+            stats::winsorize(samples, 5.0);
+            let summ = stats::Summary::new(samples);
 
-                for p in &mut *samples {
-                    self.bench_n(5 * n, |x| f(x));
-                    *p = self.ns_per_iter() as f64;
-                };
+            for p in &mut *samples {
+                self.bench_n(5 * n, |x| f(x));
+                *p = self.ns_per_iter() as f64;
+            };
 
-                stats::winsorize(samples, 5.0);
-                summ5 = Some(stats::Summary::new(samples));
-            });
-            let summ = summ.unwrap();
-            let summ5 = summ5.unwrap();
+            stats::winsorize(samples, 5.0);
+            let summ5 = stats::Summary::new(samples);
+            let loop_run = loop_start.elapsed();
 
             // If we've run for 100ms and seem to have converged to a
             // stable median.