Rollup merge of #87993 - kornelski:try_reserve_stable, r=joshtriplett

Stabilize try_reserve

Stabilization PR for the [`try_reserve` feature](https://github.com/rust-lang/rust/issues/48043#issuecomment-898040475).

4 files changed, 8 insertions, 14 deletions

diff --git a/library/alloc/src/collections/mod.rs b/library/alloc/src/collections/mod.rs
index 4e31df8b4b8..77d28bdfe64 100644
--- a/library/alloc/src/collections/mod.rs
+++ b/library/alloc/src/collections/mod.rs
@@ -57,7 +57,7 @@ use core::fmt::Display;
 
 /// The error type for `try_reserve` methods.
 #[derive(Clone, PartialEq, Eq, Debug)]
-#[unstable(feature = "try_reserve", reason = "new API", issue = "48043")]
+#[stable(feature = "try_reserve", since = "1.57.0")]
 pub struct TryReserveError {
     kind: TryReserveErrorKind,
 }
@@ -126,7 +126,7 @@ impl From<LayoutError> for TryReserveErrorKind {
     }
 }
 
-#[unstable(feature = "try_reserve", reason = "new API", issue = "48043")]
+#[stable(feature = "try_reserve", since = "1.57.0")]
 impl Display for TryReserveError {
     fn fmt(
         &self,
diff --git a/library/alloc/src/collections/vec_deque/mod.rs b/library/alloc/src/collections/vec_deque/mod.rs
index 007548ad1ab..f4de2b2ebe5 100644
--- a/library/alloc/src/collections/vec_deque/mod.rs
+++ b/library/alloc/src/collections/vec_deque/mod.rs
@@ -711,7 +711,6 @@ impl<T, A: Allocator> VecDeque<T, A> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(try_reserve)]
     /// use std::collections::TryReserveError;
     /// use std::collections::VecDeque;
     ///
@@ -730,7 +729,7 @@ impl<T, A: Allocator> VecDeque<T, A> {
     /// }
     /// # process_data(&[1, 2, 3]).expect("why is the test harness OOMing on 12 bytes?");
     /// ```
-    #[unstable(feature = "try_reserve", reason = "new API", issue = "48043")]
+    #[stable(feature = "try_reserve", since = "1.57.0")]
     pub fn try_reserve_exact(&mut self, additional: usize) -> Result<(), TryReserveError> {
         self.try_reserve(additional)
     }
@@ -749,7 +748,6 @@ impl<T, A: Allocator> VecDeque<T, A> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(try_reserve)]
     /// use std::collections::TryReserveError;
     /// use std::collections::VecDeque;
     ///
@@ -768,7 +766,7 @@ impl<T, A: Allocator> VecDeque<T, A> {
     /// }
     /// # process_data(&[1, 2, 3]).expect("why is the test harness OOMing on 12 bytes?");
     /// ```
-    #[unstable(feature = "try_reserve", reason = "new API", issue = "48043")]
+    #[stable(feature = "try_reserve", since = "1.57.0")]
     pub fn try_reserve(&mut self, additional: usize) -> Result<(), TryReserveError> {
         let old_cap = self.cap();
         let used_cap = self.len() + 1;
diff --git a/library/alloc/src/string.rs b/library/alloc/src/string.rs
index 92a17cc75ef..d88b8e39898 100644
--- a/library/alloc/src/string.rs
+++ b/library/alloc/src/string.rs
@@ -1009,7 +1009,6 @@ impl String {
     /// # Examples
     ///
     /// ```
-    /// #![feature(try_reserve)]
     /// use std::collections::TryReserveError;
     ///
     /// fn process_data(data: &str) -> Result<String, TryReserveError> {
@@ -1025,7 +1024,7 @@ impl String {
     /// }
     /// # process_data("rust").expect("why is the test harness OOMing on 4 bytes?");
     /// ```
-    #[unstable(feature = "try_reserve", reason = "new API", issue = "48043")]
+    #[stable(feature = "try_reserve", since = "1.57.0")]
     pub fn try_reserve(&mut self, additional: usize) -> Result<(), TryReserveError> {
         self.vec.try_reserve(additional)
     }
@@ -1049,7 +1048,6 @@ impl String {
     /// # Examples
     ///
     /// ```
-    /// #![feature(try_reserve)]
     /// use std::collections::TryReserveError;
     ///
     /// fn process_data(data: &str) -> Result<String, TryReserveError> {
@@ -1065,7 +1063,7 @@ impl String {
     /// }
     /// # process_data("rust").expect("why is the test harness OOMing on 4 bytes?");
     /// ```
-    #[unstable(feature = "try_reserve", reason = "new API", issue = "48043")]
+    #[stable(feature = "try_reserve", since = "1.57.0")]
     pub fn try_reserve_exact(&mut self, additional: usize) -> Result<(), TryReserveError> {
         self.vec.try_reserve_exact(additional)
     }
diff --git a/library/alloc/src/vec/mod.rs b/library/alloc/src/vec/mod.rs
index 320347e58e1..4f18a054a0d 100644
--- a/library/alloc/src/vec/mod.rs
+++ b/library/alloc/src/vec/mod.rs
@@ -849,7 +849,6 @@ impl<T, A: Allocator> Vec<T, A> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(try_reserve)]
     /// use std::collections::TryReserveError;
     ///
     /// fn process_data(data: &[u32]) -> Result<Vec<u32>, TryReserveError> {
@@ -867,7 +866,7 @@ impl<T, A: Allocator> Vec<T, A> {
     /// }
     /// # process_data(&[1, 2, 3]).expect("why is the test harness OOMing on 12 bytes?");
     /// ```
-    #[unstable(feature = "try_reserve", reason = "new API", issue = "48043")]
+    #[stable(feature = "try_reserve", since = "1.57.0")]
     pub fn try_reserve(&mut self, additional: usize) -> Result<(), TryReserveError> {
         self.buf.try_reserve(self.len, additional)
     }
@@ -892,7 +891,6 @@ impl<T, A: Allocator> Vec<T, A> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(try_reserve)]
     /// use std::collections::TryReserveError;
     ///
     /// fn process_data(data: &[u32]) -> Result<Vec<u32>, TryReserveError> {
@@ -910,7 +908,7 @@ impl<T, A: Allocator> Vec<T, A> {
     /// }
     /// # process_data(&[1, 2, 3]).expect("why is the test harness OOMing on 12 bytes?");
     /// ```
-    #[unstable(feature = "try_reserve", reason = "new API", issue = "48043")]
+    #[stable(feature = "try_reserve", since = "1.57.0")]
     pub fn try_reserve_exact(&mut self, additional: usize) -> Result<(), TryReserveError> {
         self.buf.try_reserve_exact(self.len, additional)
     }