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).

1 files changed, 2 insertions, 4 deletions

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)
     }