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authorRemko Tronçon <git@el-tramo.be>2009-06-01 08:48:42 (GMT)
committerRemko Tronçon <git@el-tramo.be>2009-06-01 09:24:28 (GMT)
commit2812bddd81f8a1b804c7460f4e14cd0aa393d129 (patch)
treed46294f35150c4f0f43deaf2d31fceaf945ae715 /3rdParty/Boost/boost/mpl/is_placeholder.hpp
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+
+#ifndef BOOST_MPL_IS_PLACEHOLDER_HPP_INCLUDED
+#define BOOST_MPL_IS_PLACEHOLDER_HPP_INCLUDED
+
+// Copyright Aleksey Gurtovoy 2001-2004
+//
+// 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: is_placeholder.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
+// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $
+// $Revision: 49267 $
+
+#include <boost/mpl/arg_fwd.hpp>
+#include <boost/mpl/bool.hpp>
+#include <boost/mpl/aux_/yes_no.hpp>
+#include <boost/mpl/aux_/type_wrapper.hpp>
+#include <boost/mpl/aux_/nttp_decl.hpp>
+#include <boost/mpl/aux_/config/ctps.hpp>
+#include <boost/mpl/aux_/config/static_constant.hpp>
+
+namespace boost { namespace mpl {
+
+#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
+
+template< typename T >
+struct is_placeholder
+ : bool_<false>
+{
+};
+
+template< BOOST_MPL_AUX_NTTP_DECL(int, N) >
+struct is_placeholder< arg<N> >
+ : bool_<true>
+{
+};
+
+#else
+
+namespace aux {
+
+aux::no_tag is_placeholder_helper(...);
+
+template< BOOST_MPL_AUX_NTTP_DECL(int, N) >
+aux::yes_tag is_placeholder_helper(aux::type_wrapper< arg<N> >*);
+
+} // namespace aux
+
+template< typename T >
+struct is_placeholder
+{
+ static aux::type_wrapper<T>* get();
+ BOOST_STATIC_CONSTANT(bool, value =
+ sizeof(aux::is_placeholder_helper(get())) == sizeof(aux::yes_tag)
+ );
+
+ typedef bool_<value> type;
+};
+
+#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+
+}}
+
+#endif // BOOST_MPL_IS_PLACEHOLDER_HPP_INCLUDED