From dfb030da6efbca77f014f7deb2f2ee98b47bac5c Mon Sep 17 00:00:00 2001
From: Maxime Coste <mawww@kakoune.org>
Date: Wed, 14 Dec 2016 13:25:55 +0000
Subject: [PATCH] Make container wrapper callback functions mutable

It seems at least std::mem_fn callable wrapper type call operator
is not guaranteed to be const, so we need to be able to call on
a non const object. This should do for now.

Fixes #978
---
 src/containers.hh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/containers.hh b/src/containers.hh
index c972d93e..621dd480 100644
--- a/src/containers.hh
+++ b/src/containers.hh
@@ -101,7 +101,7 @@ struct FilterView
     Iterator end()   const { return {*this, std::end(m_container), std::end(m_container)}; }
 
     Container m_container;
-    Filter m_filter;
+    mutable Filter m_filter;
 };
 
 template<typename Filter>
@@ -158,7 +158,7 @@ struct TransformView
     Iterator end()   const { return {*this, std::end(m_container)}; }
 
     Container m_container;
-    Transform m_transform;
+    mutable Transform m_transform;
 };
 
 template<typename Transform>