detail/utility/never_true.hpp

0001 ///////////////////////////////////////////////////////////////////////////////
0002 // never_true.hpp
0003 //
0004 //  Copyright 2008 Eric Niebler. Distributed under the Boost
0005 //  Software License, Version 1.0. (See accompanying file
0006 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0007
0008 #ifndef BOOST_XPRESSIVE_DETAIL_UTILITY_NEVER_TRUE_HPP_EAN_10_04_2005
0009 #define BOOST_XPRESSIVE_DETAIL_UTILITY_NEVER_TRUE_HPP_EAN_10_04_2005
0010
0011 #include <boost/mpl/bool.hpp>
0012
0013 namespace boost { namespace xpressive { namespace detail
0014 {
0015
0016     // for use in static asserts
0017     template<typename T>
0018     struct never_true
0019       : mpl::false_
0020     {
0021     };
0022
0023 }}}
0024
0025 #endif