From 4c7e7c7d94eaaa3bff3142c257d880a468a35934 Mon Sep 17 00:00:00 2001
From: Abseil Team <absl-team@google.com>
Date: Wed, 31 Jan 2024 13:45:52 -0800
Subject: Type erased hash_slot_fn that depends only on key types (and hash
 function).

PiperOrigin-RevId: 603148301
Change-Id: Ie2e5702995c9e1ef4d5aaab23bc89a1eb5007a86
---
 absl/container/flat_hash_set.h | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'absl/container/flat_hash_set.h')

diff --git a/absl/container/flat_hash_set.h b/absl/container/flat_hash_set.h
index cd74923c..1be00195 100644
--- a/absl/container/flat_hash_set.h
+++ b/absl/container/flat_hash_set.h
@@ -29,6 +29,7 @@
 #ifndef ABSL_CONTAINER_FLAT_HASH_SET_H_
 #define ABSL_CONTAINER_FLAT_HASH_SET_H_
 
+#include <cstddef>
 #include <memory>
 #include <type_traits>
 #include <utility>
@@ -492,6 +493,11 @@ struct FlatHashSetPolicy {
   }
 
   static size_t space_used(const T*) { return 0; }
+
+  template <class Hash>
+  static constexpr HashSlotFn get_hash_slot_fn() {
+    return &TypeErasedApplyToSlotFn<Hash, T>;
+  }
 };
 }  // namespace container_internal
 
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