From 984b12c0d2fc4a5dd551b7b596c122afaeeb66f9 Mon Sep 17 00:00:00 2001
From: Paul Beckingham <paul@beckingham.net>
Date: Sat, 26 Sep 2015 15:39:03 -0400
Subject: [PATCH] ISO8601d: Added ::operator+=

---
 src/ISO8601.cpp | 7 +++++++
 src/ISO8601.h   | 1 +
 2 files changed, 8 insertions(+)

diff --git a/src/ISO8601.cpp b/src/ISO8601.cpp
index eed021304..302904cd6 100644
--- a/src/ISO8601.cpp
+++ b/src/ISO8601.cpp
@@ -1141,6 +1141,13 @@ ISO8601d ISO8601d::operator- (const int delta)
   return ISO8601d (_date - delta);
 }
 
+////////////////////////////////////////////////////////////////////////////////
+ISO8601d& ISO8601d::operator+= (const int delta)
+{
+  _date += (time_t) delta;
+  return *this;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 void ISO8601p::clear ()
 {
diff --git a/src/ISO8601.h b/src/ISO8601.h
index 224cf9659..c7550478c 100644
--- a/src/ISO8601.h
+++ b/src/ISO8601.h
@@ -80,6 +80,7 @@ public:
 
   ISO8601d operator+  (const int);
   ISO8601d operator-  (const int);
+  ISO8601d& operator+= (const int);
 
 private:
   void clear ();