From a8cf2a84c43ab2ef9ac2b19253ec2bdacd4006f6 Mon Sep 17 00:00:00 2001
From: Maxime Coste <frrrwww@gmail.com>
Date: Wed, 22 Jun 2016 22:17:13 +0100
Subject: [PATCH] Add an Optional::emplace method

---
 src/optional.hh | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/optional.hh b/src/optional.hh
index 3aa3676f3..a4d15ff59 100644
--- a/src/optional.hh
+++ b/src/optional.hh
@@ -60,6 +60,14 @@ public:
         return false;
     }
 
+    template<typename... Args>
+    void emplace(Args&&... args)
+    {
+        destruct_ifn();
+        new (&m_value) T{std::forward<Args>(args)...};
+        m_valid = true;
+    }
+
     T& operator*()
     {
         kak_assert(m_valid);