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-rw-r--r--src/libcore/option.rs4
-rw-r--r--src/libcore/result.rs7
-rw-r--r--src/libcore/slice.rs4
-rw-r--r--src/libcore/str/mod.rs4
4 files changed, 11 insertions, 8 deletions
diff --git a/src/libcore/option.rs b/src/libcore/option.rs
index 1434617badd..a539ef81db8 100644
--- a/src/libcore/option.rs
+++ b/src/libcore/option.rs
@@ -289,6 +289,7 @@ impl<T> Option<T> {
     #[unstable(feature = "as_slice",
                reason = "waiting for mut conventions",
                issue = "27776")]
+    #[deprecated(since = "1.4.0", reason = "niche API, unclear of usefulness")]
     pub fn as_mut_slice(&mut self) -> &mut [T] {
         match *self {
             Some(ref mut x) => {
@@ -690,8 +691,9 @@ impl<T> Option<T> {
 
     /// Converts from `Option<T>` to `&[T]` (without copying)
     #[inline]
-    #[unstable(feature = "as_slice", since = "unsure of the utility here",
+    #[unstable(feature = "as_slice", reason = "unsure of the utility here",
                issue = "27776")]
+    #[deprecated(since = "1.4.0", reason = "niche API, unclear of usefulness")]
     pub fn as_slice(&self) -> &[T] {
         match *self {
             Some(ref x) => slice::ref_slice(x),
diff --git a/src/libcore/result.rs b/src/libcore/result.rs
index 2546d9cd63d..e9a67196751 100644
--- a/src/libcore/result.rs
+++ b/src/libcore/result.rs
@@ -405,8 +405,9 @@ impl<T, E> Result<T, E> {
 
     /// Converts from `Result<T, E>` to `&[T]` (without copying)
     #[inline]
-    #[unstable(feature = "as_slice", since = "unsure of the utility here",
+    #[unstable(feature = "as_slice", reason = "unsure of the utility here",
                issue = "27776")]
+    #[deprecated(since = "1.4.0", reason = "niche API, unclear of usefulness")]
     pub fn as_slice(&self) -> &[T] {
         match *self {
             Ok(ref x) => slice::ref_slice(x),
@@ -439,6 +440,7 @@ impl<T, E> Result<T, E> {
     #[unstable(feature = "as_slice",
                reason = "waiting for mut conventions",
                issue = "27776")]
+    #[deprecated(since = "1.4.0", reason = "niche API, unclear of usefulness")]
     pub fn as_mut_slice(&mut self) -> &mut [T] {
         match *self {
             Ok(ref mut x) => slice::mut_ref_slice(x),
@@ -742,12 +744,11 @@ impl<T, E: fmt::Debug> Result<T, E> {
     ///
     /// # Examples
     /// ```{.should_panic}
-    /// #![feature(result_expect)]
     /// let x: Result<u32, &str> = Err("emergency failure");
     /// x.expect("Testing expect"); // panics with `Testing expect: emergency failure`
     /// ```
     #[inline]
-    #[unstable(feature = "result_expect", reason = "newly introduced", issue = "27277")]
+    #[stable(feature = "result_expect", since = "1.4.0")]
     pub fn expect(self, msg: &str) -> T {
         match self {
             Ok(t) => t,
diff --git a/src/libcore/slice.rs b/src/libcore/slice.rs
index b5d3129d268..8d3d798afef 100644
--- a/src/libcore/slice.rs
+++ b/src/libcore/slice.rs
@@ -800,7 +800,7 @@ impl<'a, T> Iter<'a, T> {
     ///
     /// This has the same lifetime as the original slice, and so the
     /// iterator can continue to be used while this exists.
-    #[unstable(feature = "iter_to_slice", issue = "27775")]
+    #[stable(feature = "iter_to_slice", since = "1.4.0")]
     pub fn as_slice(&self) -> &'a [T] {
         make_slice!(self.ptr, self.end)
     }
@@ -848,7 +848,7 @@ impl<'a, T> IterMut<'a, T> {
     /// to consume the iterator. Consider using the `Slice` and
     /// `SliceMut` implementations for obtaining slices with more
     /// restricted lifetimes that do not consume the iterator.
-    #[unstable(feature = "iter_to_slice", issue = "27775")]
+    #[stable(feature = "iter_to_slice", since = "1.4.0")]
     pub fn into_slice(self) -> &'a mut [T] {
         make_mut_slice!(self.ptr, self.end)
     }
diff --git a/src/libcore/str/mod.rs b/src/libcore/str/mod.rs
index 139f589e6c5..69ebcb1ab7e 100644
--- a/src/libcore/str/mod.rs
+++ b/src/libcore/str/mod.rs
@@ -297,7 +297,7 @@ impl<'a> Chars<'a> {
     ///
     /// This has the same lifetime as the original slice, and so the
     /// iterator can continue to be used while this exists.
-    #[unstable(feature = "iter_to_slice", issue = "27775")]
+    #[stable(feature = "iter_to_slice", since = "1.4.0")]
     #[inline]
     pub fn as_str(&self) -> &'a str {
         unsafe { from_utf8_unchecked(self.iter.as_slice()) }
@@ -356,7 +356,7 @@ impl<'a> CharIndices<'a> {
     ///
     /// This has the same lifetime as the original slice, and so the
     /// iterator can continue to be used while this exists.
-    #[unstable(feature = "iter_to_slice", issue = "27775")]
+    #[stable(feature = "iter_to_slice", since = "1.4.0")]
     #[inline]
     pub fn as_str(&self) -> &'a str {
         self.iter.as_str()