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diff --git a/lib/asio/detail/scoped_ptr.hpp b/lib/asio/detail/scoped_ptr.hpp
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+++ b/lib/asio/detail/scoped_ptr.hpp
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+//
+// detail/scoped_ptr.hpp
+// ~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// 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)
+//
+
+#ifndef ASIO_DETAIL_SCOPED_PTR_HPP
+#define ASIO_DETAIL_SCOPED_PTR_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/config.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+namespace detail {
+
+template <typename T>
+class scoped_ptr
+{
+public:
+  // Constructor.
+  explicit scoped_ptr(T* p = 0)
+    : p_(p)
+  {
+  }
+
+  // Destructor.
+  ~scoped_ptr()
+  {
+    delete p_;
+  }
+
+  // Access.
+  T* get()
+  {
+    return p_;
+  }
+
+  // Access.
+  T* operator->()
+  {
+    return p_;
+  }
+
+  // Dereference.
+  T& operator*()
+  {
+    return *p_;
+  }
+
+  // Reset pointer.
+  void reset(T* p = 0)
+  {
+    delete p_;
+    p_ = p;
+  }
+
+  // Release ownership of the pointer.
+  T* release()
+  {
+    T* tmp = p_;
+    p_ = 0;
+    return tmp;
+  }
+
+private:
+  // Disallow copying and assignment.
+  scoped_ptr(const scoped_ptr&);
+  scoped_ptr& operator=(const scoped_ptr&);
+
+  T* p_;
+};
+
+} // namespace detail
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // ASIO_DETAIL_SCOPED_PTR_HPP