Auto merge of #122256 - Nadrieril:rollup-rc232xh, r=Nadrieril

Rollup of 8 pull requests

Successful merges:

 - #99153 (Add Read Impl for &Stdin)
 - #114655 (Make `impl<Fd: AsFd>` impl take `?Sized`)
 - #120504 (Vec::try_with_capacity)
 - #121280 (Implement MaybeUninit::fill{,_with,_from})
 - #121403 (impl From<TryReserveError> for io::Error)
 - #121526 (on the fly type casting for `build.rustc` and `build.cargo`)
 - #121584 (bump itertools to 0.12)
 - #121711 (Implement junction_point)

r? `@ghost`
`@rustbot` modify labels: rollup

1 files changed, 13 insertions, 0 deletions

diff --git a/library/alloc/src/string.rs b/library/alloc/src/string.rs
index 98ded7f6cdf..c4dcff1b1c4 100644
--- a/library/alloc/src/string.rs
+++ b/library/alloc/src/string.rs
@@ -492,6 +492,19 @@ impl String {
         String { vec: Vec::with_capacity(capacity) }
     }
 
+    /// Creates a new empty `String` with at least the specified capacity.
+    ///
+    /// # Errors
+    ///
+    /// Returns [`Err`] if the capacity exceeds `isize::MAX` bytes,
+    /// or if the memory allocator reports failure.
+    ///
+    #[inline]
+    #[unstable(feature = "try_with_capacity", issue = "91913")]
+    pub fn try_with_capacity(capacity: usize) -> Result<String, TryReserveError> {
+        Ok(String { vec: Vec::try_with_capacity(capacity)? })
+    }
+
     // HACK(japaric): with cfg(test) the inherent `[T]::to_vec` method, which is
     // required for this method definition, is not available. Since we don't
     // require this method for testing purposes, I'll just stub it