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diff --git a/src/third_party/boost-1.69.0/boost/pointer_cast.hpp b/src/third_party/boost-1.69.0/boost/pointer_cast.hpp
new file mode 100644
index 00000000000..d47327bc700
--- /dev/null
+++ b/src/third_party/boost-1.69.0/boost/pointer_cast.hpp
@@ -0,0 +1,122 @@
+//////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga 2005. 
+// 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 BOOST_POINTER_CAST_HPP
+#define BOOST_POINTER_CAST_HPP
+
+#include <boost/config.hpp>
+#include <boost/smart_ptr/detail/sp_noexcept.hpp>
+
+namespace boost { 
+
+//static_pointer_cast overload for raw pointers
+template<class T, class U>
+inline T* static_pointer_cast(U *ptr) BOOST_SP_NOEXCEPT
+{  
+   return static_cast<T*>(ptr);
+}
+
+//dynamic_pointer_cast overload for raw pointers
+template<class T, class U>
+inline T* dynamic_pointer_cast(U *ptr) BOOST_SP_NOEXCEPT
+{  
+   return dynamic_cast<T*>(ptr);
+}
+
+//const_pointer_cast overload for raw pointers
+template<class T, class U>
+inline T* const_pointer_cast(U *ptr) BOOST_SP_NOEXCEPT
+{  
+   return const_cast<T*>(ptr);
+}
+
+//reinterpret_pointer_cast overload for raw pointers
+template<class T, class U>
+inline T* reinterpret_pointer_cast(U *ptr) BOOST_SP_NOEXCEPT
+{  
+   return reinterpret_cast<T*>(ptr);
+}
+
+} // namespace boost
+
+#if !defined( BOOST_NO_CXX11_SMART_PTR )
+
+#include <boost/type_traits/has_virtual_destructor.hpp>
+#include <boost/static_assert.hpp>
+#include <memory>
+
+namespace boost {
+
+//static_pointer_cast overload for std::shared_ptr
+using std::static_pointer_cast;
+
+//dynamic_pointer_cast overload for std::shared_ptr
+using std::dynamic_pointer_cast;
+
+//const_pointer_cast overload for std::shared_ptr
+using std::const_pointer_cast;
+
+//reinterpret_pointer_cast overload for std::shared_ptr
+template<class T, class U> std::shared_ptr<T> reinterpret_pointer_cast(const std::shared_ptr<U> & r ) BOOST_SP_NOEXCEPT
+{
+    (void) reinterpret_cast< T* >( static_cast< U* >( 0 ) );
+
+    typedef typename std::shared_ptr<T>::element_type E;
+
+    E * p = reinterpret_cast< E* >( r.get() );
+    return std::shared_ptr<T>( r, p );
+}
+
+//static_pointer_cast overload for std::unique_ptr
+template<class T, class U> std::unique_ptr<T> static_pointer_cast( std::unique_ptr<U> && r ) BOOST_SP_NOEXCEPT
+{
+    (void) static_cast< T* >( static_cast< U* >( 0 ) );
+
+    typedef typename std::unique_ptr<T>::element_type E;
+
+    return std::unique_ptr<T>( static_cast<E*>( r.release() ) );
+}
+
+//dynamic_pointer_cast overload for std::unique_ptr
+template<class T, class U> std::unique_ptr<T> dynamic_pointer_cast( std::unique_ptr<U> && r ) BOOST_SP_NOEXCEPT
+{
+    (void) dynamic_cast< T* >( static_cast< U* >( 0 ) );
+
+    BOOST_STATIC_ASSERT_MSG( boost::has_virtual_destructor<T>::value, "The target of dynamic_pointer_cast must have a virtual destructor." );
+
+    T * p = dynamic_cast<T*>( r.get() );
+    if( p ) r.release();
+    return std::unique_ptr<T>( p );
+}
+
+//const_pointer_cast overload for std::unique_ptr
+template<class T, class U> std::unique_ptr<T> const_pointer_cast( std::unique_ptr<U> && r ) BOOST_SP_NOEXCEPT
+{
+    (void) const_cast< T* >( static_cast< U* >( 0 ) );
+
+    typedef typename std::unique_ptr<T>::element_type E;
+
+    return std::unique_ptr<T>( const_cast<E*>( r.release() ) );
+}
+
+//reinterpret_pointer_cast overload for std::unique_ptr
+template<class T, class U> std::unique_ptr<T> reinterpret_pointer_cast( std::unique_ptr<U> && r ) BOOST_SP_NOEXCEPT
+{
+    (void) reinterpret_cast< T* >( static_cast< U* >( 0 ) );
+
+    typedef typename std::unique_ptr<T>::element_type E;
+
+    return std::unique_ptr<T>( reinterpret_cast<E*>( r.release() ) );
+}
+
+} // namespace boost
+
+#endif // #if !defined( BOOST_NO_CXX11_SMART_PTR )
+
+#endif   //BOOST_POINTER_CAST_HPP