From 21f151cadb266bc6a10f09f3ac02ab4ca9fc999a Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Wed, 31 Mar 2021 15:23:40 +0200
Subject: [PATCH] tour:: slide_backup with 1 parameter

---
 tour.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tour.cpp b/tour.cpp
index 68490278..3bf9c673 100644
--- a/tour.cpp
+++ b/tour.cpp
@@ -81,6 +81,8 @@ template<class T, class U> void slide_backup(T& what, U value) {
   restorers.push_back([&what, backup] { what = backup; });
   what = value;
   }
+
+template<class T> void slide_backup(T& what) { slide_backup(what, what); }
 #endif
 
 EX void on_restore(const reaction_t& t) {