Issue 6279 - Make HashContainer movable and optimize resizing by moving entries.

compiled/IntMap.h

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 60 matching lines @@
 
   template<typename Value>
   struct Uint32MapEntry : Uint32SetEntry
   {
     typedef Uint32SetEntry super;
     typedef Value value_type;
 
     value_type second;
 
     Uint32MapEntry(key_type_cref key = KEY_INVALID, value_type value = value_type())
-        : Uint32SetEntry(key), second(value)
+        : Uint32SetEntry(key), second(std::move(value))
     {
     }
 
     void erase()
     {
       super::erase();
       second = value_type();
     }
   };
 }
 
 using Uint32Set = Set<Uint32Map_internal::Uint32SetEntry>;
 
 template<typename Value>
 using Uint32Map = Map<Uint32Map_internal::Uint32MapEntry<Value>>;