ceph/src/boost/boost/variant/detail/substitute_fwd.hpp

   1 //-----------------------------------------------------------------------------
   2 // boost variant/detail/substitute_fwd.hpp header file
   3 // See http://www.boost.org for updates, documentation, and revision history.
   4 //-----------------------------------------------------------------------------
   5 //
   6 // Copyright (c) 2003
   7 // Eric Friedman
   8 //
   9 // Distributed under the Boost Software License, Version 1.0. (See
  10 // accompanying file LICENSE_1_0.txt or copy at
  11 // http://www.boost.org/LICENSE_1_0.txt)
  12
  13 #ifndef BOOST_VARIANT_DETAIL_SUBSTITUTE_FWD_HPP
  14 #define BOOST_VARIANT_DETAIL_SUBSTITUTE_FWD_HPP
  15
  16 #include <boost/mpl/aux_/lambda_arity_param.hpp>
  17 #include <boost/mpl/aux_/template_arity.hpp>
  18 #include <boost/mpl/int_fwd.hpp>
  19
  20
  21 ///////////////////////////////////////////////////////////////////////////////
  22 // BOOST_VARIANT_DETAIL_NO_SUBSTITUTE
  23 //
  24 // Defined if 'substitute' is not implementable on the current compiler.
  25 //
  26
  27 #include <boost/mpl/aux_/config/ctps.hpp>
  28 #include <boost/mpl/aux_/config/ttp.hpp>
  29
  30 #if defined(BOOST_NO_TEMPLATE_TEMPLATE_PARAMETERS) \
  31  && !defined(BOOST_VARIANT_DETAIL_NO_SUBSTITUTE)
  32 #   define BOOST_VARIANT_DETAIL_NO_SUBSTITUTE
  33 #endif
  34
  35 namespace boost {
  36 namespace detail { namespace variant {
  37
  38 #if !defined(BOOST_VARIANT_DETAIL_NO_SUBSTITUTE)
  39
  40 ///////////////////////////////////////////////////////////////////////////////
  41 // metafunction substitute
  42 //
  43 // Substitutes one type for another in the given type expression.
  44 //
  45 template <
  46       typename T, typename Dest, typename Source
  47       BOOST_MPL_AUX_LAMBDA_ARITY_PARAM(
  48           typename Arity = mpl::int_< mpl::aux::template_arity<T>::value >
  49         )
  50     >
  51 struct substitute;
  52
  53 #endif // !defined(BOOST_VARIANT_DETAIL_NO_SUBSTITUTE)
  54
  55 }} // namespace detail::variant
  56 } // namespace boost
  57
  58 #endif // BOOST_VARIANT_DETAIL_SUBSTITUTE_FWD_HPP