Added boost header

test/external/boost/ptr_container/detail/is_convertible.hpp

@@ -0,0 +1,73 @@
+// (C) Copyright Thorsten Ottosen 2005
+// (C) Copyright Howard Hinnant 2004
+// (C) Copyright Jonathan Turkanis 2004
+// 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.)
+
+//
+// Contains type traits machinery for incomplete arrays. MPL compatibility
+// is included for completeness, but is not necessary for the current 
+// application.
+// 
+
+#ifndef BOOST_MOVE_PTR_ARRAYS_HPP_INCLUDED
+#define BOOST_MOVE_PTR_ARRAYS_HPP_INCLUDED
+
+#include <boost/config.hpp> // BOOST_STATIC_CONSTANT.
+#include <boost/mpl/aux_/lambda_support.hpp>
+#include <boost/mpl/and.hpp>
+#include <boost/mpl/bool.hpp>
+#include <boost/mpl/identity.hpp>
+#include <boost/mpl/if.hpp>
+#include <boost/type_traits/is_array.hpp>
+#include <boost/type_traits/is_convertible.hpp>
+#include <boost/type_traits/is_same.hpp>
+#include <boost/type_traits/remove_bounds.hpp>
+#include <boost/type_traits/remove_cv.hpp>
+#include <boost/utility/enable_if.hpp>
+
+namespace boost { namespace ptr_container_detail { namespace move_ptrs {
+
+// From Howard Hinnant.
+template<typename T, typename U>
+struct is_array_convertible {
+    typedef typename remove_bounds<T>::type      t_element; 
+    typedef typename remove_bounds<U>::type      u_element; 
+    typedef typename remove_cv<t_element>::type  t_base; 
+    typedef typename remove_cv<u_element>::type  u_base; 
+    typedef typename 
+            mpl::and_<
+                is_array<T>,
+                is_array<U>,
+                is_same<t_base, u_base>,
+                is_convertible<t_element*, u_element*>
+            >::type                                     type;
+    BOOST_STATIC_CONSTANT(bool, value = type::value);
+    BOOST_MPL_AUX_LAMBDA_SUPPORT(2, is_array_convertible, (T, U))
+};
+
+template<typename T, typename U>
+struct is_smart_ptr_convertible 
+    : mpl::if_<
+          is_array<T>,
+          is_array_convertible<T, U>,
+          is_convertible<T*, U*> 
+      >::type
+    { };
+
+#ifndef BOOST_NO_SFINAE
+    template<typename Src, typename Tgt, typename T = void>
+    struct enable_if_convertible 
+        : enable_if< 
+              is_smart_ptr_convertible<Src, Tgt>,
+              T
+          >
+        { };
+#else
+    template<typename Src, typename Tgt, class T >
+    struct enable_if_convertible : mpl::identity<T> { };
+#endif
+
+} } }         // End namespaces ptr_container_detail, move_ptrs, boost.
+
+#endif      // #ifndef BOOST_MOVE_PTR_ARRAYS_HPP_INCLUDED