commit 0b3ebb546fac5de6be624d335abb3c5f7ad82c74
author Zachary S <zasample18+github@gmail.com> Sat May 11 07:11:36 2024 -0500
committer Zachary S <zasample18+github@gmail.com> Sun May 12 20:27:29 2024 -0500
tree a6c27e7b7c35ca89430b10b4599961c50f05f6ef
parent 5c6326ad799511e59b1de60b25603309d5322090

Add note about possible allocation-sharing to Arc/Rc<str/[T]/CStr>::default.

library/alloc/src/ffi/c_str.rs

diff --git a/library/alloc/src/ffi/c_str.rs b/library/alloc/src/ffi/c_str.rs
index 19dd90e..3b56a57 100644
--- a/library/alloc/src/ffi/c_str.rs
+++ b/library/alloc/src/ffi/c_str.rs
@@ -914,6 +914,8 @@ fn from(s: &CStr) -> Rc<CStr> {
 #[stable(feature = "more_rc_default_impls", since = "CURRENT_RUSTC_VERSION")]
 impl Default for Arc<CStr> {
     /// Creates an empty CStr inside an Arc
+    ///
+    /// This may or may not share an allocation with other Arcs.
     #[inline]
     fn default() -> Self {
         let c_str: &CStr = Default::default();
@@ -925,6 +927,8 @@ fn default() -> Self {
 #[stable(feature = "more_rc_default_impls", since = "CURRENT_RUSTC_VERSION")]
 impl Default for Rc<CStr> {
     /// Creates an empty CStr inside an Rc
+    ///
+    /// This may or may not share an allocation with other Rcs on the same thread.
     #[inline]
     fn default() -> Self {
         let c_str: &CStr = Default::default();

library/alloc/src/rc.rs

diff --git a/library/alloc/src/rc.rs b/library/alloc/src/rc.rs
index 2064898..dddd060 100644
--- a/library/alloc/src/rc.rs
+++ b/library/alloc/src/rc.rs
@@ -2228,6 +2228,8 @@ fn default() -> Rc<T> {
 #[stable(feature = "more_rc_default_impls", since = "CURRENT_RUSTC_VERSION")]
 impl Default for Rc<str> {
     /// Creates an empty str inside an Rc
+    ///
+    /// This may or may not share an allocation with other Rcs on the same thread.
     #[inline]
     fn default() -> Self {
         Rc::from("")
@@ -2238,6 +2240,8 @@ fn default() -> Self {
 #[stable(feature = "more_rc_default_impls", since = "CURRENT_RUSTC_VERSION")]
 impl<T> Default for Rc<[T]> {
     /// Creates an empty `[T]` inside an Rc
+    ///
+    /// This may or may not share an allocation with other Rcs on the same thread.
     #[inline]
     fn default() -> Self {
         let arr: [T; 0] = [];

library/alloc/src/sync.rs

diff --git a/library/alloc/src/sync.rs b/library/alloc/src/sync.rs
index 5f6ce80..f06994f 100644
--- a/library/alloc/src/sync.rs
+++ b/library/alloc/src/sync.rs
@@ -3304,6 +3304,8 @@ fn default() -> Arc<T> {
 #[stable(feature = "more_rc_default_impls", since = "CURRENT_RUSTC_VERSION")]
 impl Default for Arc<str> {
     /// Creates an empty str inside an Arc
+    ///
+    /// This may or may not share an allocation with other Arcs.
     #[inline]
     fn default() -> Self {
         Arc::from("")
@@ -3314,6 +3316,8 @@ fn default() -> Self {
 #[stable(feature = "more_rc_default_impls", since = "CURRENT_RUSTC_VERSION")]
 impl<T> Default for Arc<[T]> {
     /// Creates an empty `[T]` inside an Arc
+    ///
+    /// This may or may not share an allocation with other Arcs.
     #[inline]
     fn default() -> Self {
         let arr: [T; 0] = [];