From de40f961e307157d73b6ff57c5a47631f5c1451a Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Tue, 25 Jul 2023 10:00:45 +1000
Subject: [PATCH] hash/tuple: add is_transparent

---
 hash/tuple.hpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/hash/tuple.hpp b/hash/tuple.hpp
index 8e7c47d5..f36961e3 100644
--- a/hash/tuple.hpp
+++ b/hash/tuple.hpp
@@ -17,6 +17,8 @@ namespace cruft::hash {
     >
     class tuple {
     public:
+        using is_transparent = void;
+
         template <typename ...ValueT>
         auto
         operator() (std::tuple<ValueT...> const &val) const