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      1 
      2 #ifndef BOOST_MPL_PROTECT_HPP_INCLUDED
      3 #define BOOST_MPL_PROTECT_HPP_INCLUDED
      4 
      5 // Copyright Peter Dimov 2001
      6 // Copyright Aleksey Gurtovoy 2002-2004
      7 //
      8 // Distributed under the Boost Software License, Version 1.0.
      9 // (See accompanying file LICENSE_1_0.txt or copy at
     10 // http://www.boost.org/LICENSE_1_0.txt)
     11 //
     12 // See http://www.boost.org/libs/mpl for documentation.
     13 
     14 // $Id: protect.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
     15 // $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $
     16 // $Revision: 49267 $
     17 
     18 #include <boost/mpl/aux_/arity.hpp>
     19 #include <boost/mpl/aux_/config/dtp.hpp>
     20 #include <boost/mpl/aux_/nttp_decl.hpp>
     21 #include <boost/mpl/aux_/na_spec.hpp>
     22 
     23 namespace boost { namespace mpl {
     24 
     25 template<
     26       typename BOOST_MPL_AUX_NA_PARAM(T)
     27     , int not_le_ = 0
     28     >
     29 struct protect : T
     30 {
     31 #if BOOST_WORKAROUND(__EDG_VERSION__, == 238)
     32     typedef mpl::protect type;
     33 #else
     34     typedef protect type;
     35 #endif
     36 };
     37 
     38 #if defined(BOOST_MPL_CFG_BROKEN_DEFAULT_PARAMETERS_IN_NESTED_TEMPLATES)
     39 namespace aux {
     40 template< BOOST_MPL_AUX_NTTP_DECL(int, N), typename T >
     41 struct arity< protect<T>, N >
     42     : arity<T,N>
     43 {
     44 };
     45 } // namespace aux
     46 #endif
     47 
     48 BOOST_MPL_AUX_NA_SPEC_MAIN(1, protect)
     49 #if !defined(BOOST_MPL_CFG_NO_FULL_LAMBDA_SUPPORT)
     50 BOOST_MPL_AUX_NA_SPEC_TEMPLATE_ARITY(1, 1, protect)
     51 #endif
     52 
     53 }}
     54 
     55 #endif // BOOST_MPL_PROTECT_HPP_INCLUDED
     56