From 94a0819fe3a0d679c3042a77bfe6a2afc505daea Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:11:28 +0200
Subject: Adding upstream version 1.66.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 compiler/rustc_data_structures/src/fx.rs | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

(limited to 'compiler/rustc_data_structures/src/fx.rs')

diff --git a/compiler/rustc_data_structures/src/fx.rs b/compiler/rustc_data_structures/src/fx.rs
index bbeb193db..0d0c51b68 100644
--- a/compiler/rustc_data_structures/src/fx.rs
+++ b/compiler/rustc_data_structures/src/fx.rs
@@ -2,13 +2,26 @@ use std::hash::BuildHasherDefault;
 
 pub use rustc_hash::{FxHashMap, FxHashSet, FxHasher};
 
+pub type StdEntry<'a, K, V> = std::collections::hash_map::Entry<'a, K, V>;
+
 pub type FxIndexMap<K, V> = indexmap::IndexMap<K, V, BuildHasherDefault<FxHasher>>;
 pub type FxIndexSet<V> = indexmap::IndexSet<V, BuildHasherDefault<FxHasher>>;
+pub type IndexEntry<'a, K, V> = indexmap::map::Entry<'a, K, V>;
 
 #[macro_export]
 macro_rules! define_id_collections {
-    ($map_name:ident, $set_name:ident, $key:ty) => {
+    ($map_name:ident, $set_name:ident, $entry_name:ident, $key:ty) => {
         pub type $map_name<T> = $crate::fx::FxHashMap<$key, T>;
         pub type $set_name = $crate::fx::FxHashSet<$key>;
+        pub type $entry_name<'a, T> = $crate::fx::StdEntry<'a, $key, T>;
+    };
+}
+
+#[macro_export]
+macro_rules! define_stable_id_collections {
+    ($map_name:ident, $set_name:ident, $entry_name:ident, $key:ty) => {
+        pub type $map_name<T> = $crate::fx::FxIndexMap<$key, T>;
+        pub type $set_name = $crate::fx::FxIndexSet<$key>;
+        pub type $entry_name<'a, T> = $crate::fx::IndexEntry<'a, $key, T>;
     };
 }
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