From cdb742dd4b5d0d922a54836f89eaf83b0f73daa4 Mon Sep 17 00:00:00 2001
From: Nikolai Kochetov <nik-kochetov@yandex-team.ru>
Date: Mon, 18 May 2020 09:06:48 +0300
Subject: [PATCH] Added comment.

---
 src/Common/COW.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/Common/COW.h b/src/Common/COW.h
index 2bc8e8aba00..23733a8635d 100644
--- a/src/Common/COW.h
+++ b/src/Common/COW.h
@@ -217,6 +217,7 @@ protected:
         operator const immutable_ptr<T> & () const { return value; }
         operator immutable_ptr<T> & () { return value; }
 
+        /// Get internal immutable ptr. Does not change internal use counter.
         immutable_ptr<T> detach() && { return std::move(value); }
 
         operator bool() const { return value != nullptr; }