From 5b740913d04654487138a5f1e58a924cf2c36c9c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=9B=D0=B5=D0=BE=D0=BD=D0=B8=D0=B4=20=D0=AE=D1=80=D1=8C?=
 =?UTF-8?q?=D0=B5=D0=B2=20=28Leonid=20Yuriev=29?= <leo@yuriev.ru>
Date: Wed, 12 Nov 2025 16:28:44 +0300
Subject: [PATCH] mdbx++: add missing `std::hash<mdbx::buffer<>>`.

---
 mdbx.h++ | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/mdbx.h++ b/mdbx.h++
index 36621791..7934a270 100644
--- a/mdbx.h++
+++ b/mdbx.h++
@@ -6415,6 +6415,12 @@ template <> struct hash<::mdbx::slice> {
   MDBX_CXX14_CONSTEXPR size_t operator()(::mdbx::slice const &slice) const noexcept { return slice.hash_value(); }
 };
 
+template <class ALLOCATOR, typename CAPACITY_POLICY> struct hash<::mdbx::buffer<ALLOCATOR, CAPACITY_POLICY>> {
+  MDBX_CXX14_CONSTEXPR size_t operator()(::mdbx::buffer<ALLOCATOR, CAPACITY_POLICY> const &buffer) const noexcept {
+    return buffer.hash_value();
+  }
+};
+
 /// end cxx_api @}
 } // namespace std