整理

include/boost/mpl/map/aux_/has_key_impl.hpp

@@ -0,0 +1,44 @@
+
+#ifndef BOOST_MPL_MAP_AUX_HAS_KEY_IMPL_HPP_INCLUDED
+#define BOOST_MPL_MAP_AUX_HAS_KEY_IMPL_HPP_INCLUDED
+
+// Copyright Aleksey Gurtovoy 2003-2004
+// Copyright David Abrahams 2003-2004
+//
+// 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)
+//
+// See http://www.boost.org/libs/mpl for documentation.
+
+// $Id$
+// $Date$
+// $Revision$
+
+#include <boost/mpl/has_key_fwd.hpp>
+#include <boost/mpl/map/aux_/tag.hpp>
+#include <boost/mpl/map/aux_/at_impl.hpp>
+#include <boost/mpl/void.hpp>
+#include <boost/mpl/aux_/config/typeof.hpp>
+
+namespace boost { namespace mpl {
+
+template<>
+struct has_key_impl< aux::map_tag >
+{
+    template< typename Map, typename Key > struct apply
+#if defined(BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES)
+        : is_not_void_< 
+              typename at_impl<aux::map_tag>
+                ::apply<Map,Key>::type
+            >
+#else
+        : bool_< ( x_order_impl<Map,Key>::value > 1 ) >
+#endif
+    {
+    };
+};
+
+}}
+
+#endif // BOOST_MPL_MAP_AUX_HAS_KEY_IMPL_HPP_INCLUDED