From 1f05cdfb17e2360715d1123d7acd92fd3792e0b0 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Sat, 11 Jan 2020 06:06:54 +0200
Subject: [PATCH] Include <functional>, for g++ trunk (10.0)

---
 include/boost/variant2/variant.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/boost/variant2/variant.hpp b/include/boost/variant2/variant.hpp
index e99382c..069823a 100644
--- a/include/boost/variant2/variant.hpp
+++ b/include/boost/variant2/variant.hpp
@@ -25,6 +25,7 @@
 #include <cassert>
 #include <initializer_list>
 #include <utility>
+#include <functional> // std::hash
 
 //