整理

include/boost/mpl/aux_/has_apply.hpp

@@ -0,0 +1,32 @@
+
+#ifndef BOOST_MPL_AUX_HAS_APPLY_HPP_INCLUDED
+#define BOOST_MPL_AUX_HAS_APPLY_HPP_INCLUDED
+
+// Copyright Aleksey Gurtovoy 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_xxx.hpp>
+#include <boost/mpl/aux_/config/has_apply.hpp>
+
+namespace boost { namespace mpl { namespace aux {
+#if !defined(BOOST_MPL_CFG_NO_HAS_APPLY)
+BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF(has_apply, apply, false)
+#else
+template< typename T, typename fallback_ = false_ >
+struct has_apply
+    : fallback_
+{
+};
+#endif
+}}}
+
+#endif // BOOST_MPL_AUX_HAS_APPLY_HPP_INCLUDED