std: Stabilize library APIs for 1.5

This commit stabilizes and deprecates library APIs whose FCP has closed in the
last cycle, specifically:

Stabilized APIs:

* `fs::canonicalize`
* `Path::{metadata, symlink_metadata, canonicalize, read_link, read_dir, exists,
   is_file, is_dir}` - all moved to inherent methods from the `PathExt` trait.
* `Formatter::fill`
* `Formatter::width`
* `Formatter::precision`
* `Formatter::sign_plus`
* `Formatter::sign_minus`
* `Formatter::alternate`
* `Formatter::sign_aware_zero_pad`
* `string::ParseError`
* `Utf8Error::valid_up_to`
* `Iterator::{cmp, partial_cmp, eq, ne, lt, le, gt, ge}`
* `<[T]>::split_{first,last}{,_mut}`
* `Condvar::wait_timeout` - note that `wait_timeout_ms` is not yet deprecated
  but will be once 1.5 is released.
* `str::{R,}MatchIndices`
* `str::{r,}match_indices`
* `char::from_u32_unchecked`
* `VecDeque::insert`
* `VecDeque::shrink_to_fit`
* `VecDeque::as_slices`
* `VecDeque::as_mut_slices`
* `VecDeque::swap_remove_front` - (renamed from `swap_front_remove`)
* `VecDeque::swap_remove_back` - (renamed from `swap_back_remove`)
* `Vec::resize`
* `str::slice_mut_unchecked`
* `FileTypeExt`
* `FileTypeExt::{is_block_device, is_char_device, is_fifo, is_socket}`
* `BinaryHeap::from` - `from_vec` deprecated in favor of this
* `BinaryHeap::into_vec` - plus a `Into` impl
* `BinaryHeap::into_sorted_vec`

Deprecated APIs

* `slice::ref_slice`
* `slice::mut_ref_slice`
* `iter::{range_inclusive, RangeInclusive}`
* `std::dynamic_lib`

Closes #27706
Closes #27725
cc #27726 (align not stabilized yet)
Closes #27734
Closes #27737
Closes #27742
Closes #27743
Closes #27772
Closes #27774
Closes #27777
Closes #27781
cc #27788 (a few remaining methods though)
Closes #27790
Closes #27793
Closes #27796
Closes #27810
cc #28147 (not all parts stabilized)

3 files changed, 1 insertions, 4 deletions

diff --git a/src/libsyntax/lib.rs b/src/libsyntax/lib.rs
index f3b2c79a7dd..9adef08771d 100644
--- a/src/libsyntax/lib.rs
+++ b/src/libsyntax/lib.rs
@@ -29,7 +29,6 @@
 #![feature(drain)]
 #![feature(filling_drop)]
 #![feature(libc)]
-#![feature(ref_slice)]
 #![feature(rustc_private)]
 #![feature(set_stdio)]
 #![feature(staged_api)]
@@ -37,7 +36,6 @@
 #![feature(str_escape)]
 #![feature(unicode)]
 #![feature(vec_push_all)]
-#![feature(vec_resize)]
 
 extern crate fmt_macros;
 extern crate serialize;
diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index fcebe035961..ef3aad1cd45 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -422,7 +422,7 @@ impl<'a> Parser<'a> {
                                    this_token_str)))
             }
         } else {
-            self.expect_one_of(slice::ref_slice(t), &[])
+            self.expect_one_of(unsafe { slice::from_raw_parts(t, 1) }, &[])
         }
     }
 
diff --git a/src/libsyntax/util/small_vector.rs b/src/libsyntax/util/small_vector.rs
index 9743da15a47..d65e37fd2ab 100644
--- a/src/libsyntax/util/small_vector.rs
+++ b/src/libsyntax/util/small_vector.rs
@@ -65,7 +65,6 @@ impl<T> SmallVector<T> {
                 result
             }
             One(ref v) => {
-                // FIXME: Could be replaced with `slice::ref_slice(v)` when it is stable.
                 unsafe { slice::from_raw_parts(v, 1) }
             }
             Many(ref vs) => vs