整理

include/boost/move/detail/destruct_n.hpp

@@ -0,0 +1,66 @@
+//////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga 2015-2016.
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+// See http://www.boost.org/libs/move for documentation.
+//
+//////////////////////////////////////////////////////////////////////////////
+
+//! \file
+
+#ifndef BOOST_MOVE_DETAIL_DESTRUCT_N_HPP
+#define BOOST_MOVE_DETAIL_DESTRUCT_N_HPP
+
+#ifndef BOOST_CONFIG_HPP
+#  include <boost/config.hpp>
+#endif
+#
+#if defined(BOOST_HAS_PRAGMA_ONCE)
+#  pragma once
+#endif
+
+#include <cstddef>
+
+namespace boost {
+namespace movelib{
+
+template<class T, class RandItUninit>
+class destruct_n
+{
+   public:
+   explicit destruct_n(RandItUninit raw)
+      : m_ptr(raw), m_size()
+   {}
+
+   void incr()
+   {
+      ++m_size;
+   }
+
+   void incr(std::size_t n)
+   {
+      m_size += n;
+   }
+
+   void release()
+   {
+      m_size = 0u;
+   }
+
+   ~destruct_n()
+   {
+      while(m_size--){
+         m_ptr[m_size].~T();
+      }
+   }
+   private:
+   RandItUninit m_ptr;
+   std::size_t m_size;
+};
+
+}} //namespace boost {  namespace movelib{
+
+#endif //#ifndef BOOST_MOVE_DETAIL_DESTRUCT_N_HPP