From e445b0ddbd73ea61f0c838a8536d0ef6a461954a Mon Sep 17 00:00:00 2001
From: Jordan Peck <jordan.me2@gmail.com>
Date: Mon, 8 Apr 2024 16:55:40 +0100
Subject: [PATCH] Passthrough is_avalanching from std::hash

---
 include/ankerl/unordered_dense.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/ankerl/unordered_dense.h b/include/ankerl/unordered_dense.h
index fd81e96..a5697cb 100644
--- a/include/ankerl/unordered_dense.h
+++ b/include/ankerl/unordered_dense.h
@@ -277,6 +277,15 @@ struct hash {
     }
 };
 
+template <typename T>
+struct hash<T, typename std::hash<T>::is_avalanching> {
+    using is_avalanching = void;
+    auto operator()(T const& obj) const noexcept(noexcept(std::declval<std::hash<T>>().operator()(std::declval<T const&>())))
+        -> uint64_t {
+        return std::hash<T>{}(obj);
+    }
+};
+
 template <typename CharT>
 struct hash<std::basic_string<CharT>> {
     using is_avalanching = void;