From a7ab08498cb4c607225908453154805458c5e815 Mon Sep 17 00:00:00 2001
From: Alexey Milovidov <milovidov@yandex-team.ru>
Date: Mon, 17 Feb 2020 23:53:08 +0300
Subject: [PATCH] Comments (before the code will be removed completely)

---
 libs/libcommon/include/ext/singleton.h | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/libs/libcommon/include/ext/singleton.h b/libs/libcommon/include/ext/singleton.h
index ed4be05de09..8392ae7fc01 100644
--- a/libs/libcommon/include/ext/singleton.h
+++ b/libs/libcommon/include/ext/singleton.h
@@ -2,7 +2,15 @@
 
 #include <memory>
 
-namespace ext {
+namespace ext
+{
+
+/** Thread-unsafe singleton. It works simply like a global variable.
+  * Supports deinitialization.
+  *
+  * In most of the cases, you don't need this class.
+  * Use "Meyers Singleton" instead: static T & instance() { static T x; return x; }
+  */
 
 template <class T>
 class Singleton
@@ -11,14 +19,7 @@ public:
     Singleton()
     {
         if (!instance)
-            instance.reset(new T);
-    }
-
-    template <typename ... Args>
-    Singleton(const Args & ... args)
-    {
-        instance.reset(new T(args...));
-        /// TODO: throw exception on double-creation.
+            instance = std::make_unique<T>();
     }
 
     T * operator->()