mark const fn constructors as rustc_const_stable_indirect

src/lib.rs

@@ -24,6 +24,7 @@
         strict_provenance_lints
     )
 )]
+#![cfg_attr(feature = "rustc-dep-of-std", feature(rustc_attrs))]
 #![allow(
     clippy::doc_markdown,
     clippy::module_name_repetitions,
@@ -52,6 +53,7 @@ pub enum DefaultHashBuilder {}
 extern crate std;
 
 #[cfg_attr(test, macro_use)]
+#[cfg_attr(feature = "rustc-dep-of-std", allow(unused_extern_crates))]
 extern crate alloc;
 
 #[cfg(feature = "nightly")]

src/map.rs

@@ -453,6 +453,7 @@ impl<K, V, S> HashMap<K, V, S> {
     /// map.insert(1, 2);
     /// ```
     #[cfg_attr(feature = "inline-more", inline)]
+    #[cfg_attr(feature = "rustc-dep-of-std", rustc_const_stable_indirect)]
     pub const fn with_hasher(hash_builder: S) -> Self {
         Self {
             hash_builder,
@@ -538,6 +539,7 @@ impl<K, V, S, A: Allocator> HashMap<K, V, S, A> {
     /// map.insert(1, 2);
     /// ```
     #[cfg_attr(feature = "inline-more", inline)]
+    #[cfg_attr(feature = "rustc-dep-of-std", rustc_const_stable_indirect)]
     pub const fn with_hasher_in(hash_builder: S, alloc: A) -> Self {
         Self {
             hash_builder,

src/raw/mod.rs

@@ -677,6 +677,7 @@ impl<T> RawTable<T, Global> {
     /// leave the data pointer dangling since that bucket is never written to
     /// due to our load factor forcing us to always have at least 1 free bucket.
     #[inline]
+    #[cfg_attr(feature = "rustc-dep-of-std", rustc_const_stable_indirect)]
     pub const fn new() -> Self {
         Self {
             table: RawTableInner::NEW,
@@ -702,6 +703,7 @@ impl<T, A: Allocator> RawTable<T, A> {
     /// leave the data pointer dangling since that bucket is never written to
     /// due to our load factor forcing us to always have at least 1 free bucket.
     #[inline]
+    #[cfg_attr(feature = "rustc-dep-of-std", rustc_const_stable_indirect)]
     pub const fn new_in(alloc: A) -> Self {
         Self {
             table: RawTableInner::NEW,

src/set.rs

@@ -465,6 +465,7 @@ impl<T, S> HashSet<T, S, Global> {
     /// set.insert(2);
     /// ```
     #[cfg_attr(feature = "inline-more", inline)]
+    #[cfg_attr(feature = "rustc-dep-of-std", rustc_const_stable_indirect)]
     pub const fn with_hasher(hasher: S) -> Self {
         Self {
             map: HashMap::with_hasher(hasher),
@@ -552,6 +553,7 @@ where
     /// set.insert(2);
     /// ```
     #[cfg_attr(feature = "inline-more", inline)]
+    #[cfg_attr(feature = "rustc-dep-of-std", rustc_const_stable_indirect)]
     pub const fn with_hasher_in(hasher: S, alloc: A) -> Self {
         Self {
             map: HashMap::with_hasher_in(hasher, alloc),