This commit was manufactured by cvs2svn to create branch 'RC_1_31_0'.

[SVN r21515]
2004-01-06 17:35:37 +00:00
parent 3b8c0a6025
commit f5d1feb76e
2 changed files with 145 additions and 0 deletions
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+// Copyright David Abrahams 2004. Use, modification and distribution is
+// subject to 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 POINTEE_DWA200415_HPP
+# define POINTEE_DWA200415_HPP
+
+// dereferenceable_traits provides access to the value_type and
+// reference of a Dereferenceable type.
+
+# include <boost/detail/is_incrementable.hpp>
+# include <boost/iterator/iterator_traits.hpp>
+# include <boost/type_traits/remove_cv.hpp>
+# include <boost/mpl/apply_if.hpp>
+
+namespace boost { 
+
+namespace detail
+{
+  template <class P>
+  struct smart_ptr_value
+  {
+      typedef typename remove_cv<typename P::element_type>::type type;
+  };
+}
+
+template <class P>
+struct pointee
+{
+    typedef typename remove_cv<P>::type stripped;
+    
+    typedef typename mpl::apply_if<
+        detail::is_incrementable<stripped>
+      , iterator_value<stripped>
+      , detail::smart_ptr_value<stripped>
+    >::type type;
+};
+  
+} // namespace boost
+
+#endif // POINTEE_DWA200415_HPP