From 272d487b3d490126e520b67fe76bbb2e67226c07 Mon Sep 17 00:00:00 2001
From: Howard Hinnant <howard.hinnant@gmail.com>
Date: Thu, 31 Aug 2017 17:45:42 -0400
Subject: [PATCH] Add non-const front() to tzdb_list

* Needed when USE_OS_TZDB==1 && MISSING_LEAP_SECONDS==0
---
 tz.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tz.h b/tz.h
index fb8af00..d3c2a99 100644
--- a/tz.h
+++ b/tz.h
@@ -1222,6 +1222,7 @@ public:
     tzdb_list(tzdb_list&& x) noexcept;
 
     const TZ_DB& front() const noexcept {return *head_;}
+          TZ_DB& front()       noexcept {return *head_;}
 
     class const_iterator;