boost/mpl/placeholders.hpp

   1
   2 #if !defined(BOOST_PP_IS_ITERATING)
   3
   4 ///// header body
   5
   6 #ifndef BOOST_MPL_PLACEHOLDERS_HPP_INCLUDED
   7 #define BOOST_MPL_PLACEHOLDERS_HPP_INCLUDED
   8
   9 // Copyright Aleksey Gurtovoy 2001-2004
  10 // Copyright Peter Dimov 2001-2003
  11 //
  12 // Distributed under the Boost Software License, Version 1.0.
  13 // (See accompanying file LICENSE_1_0.txt or copy at
  14 // http://www.boost.org/LICENSE_1_0.txt)
  15 //
  16 // See http://www.boost.org/libs/mpl for documentation.
  17
  18 // $Id: placeholders.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
  19 // $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $
  20 // $Revision: 49267 $
  21
  22
  23 #if !defined(BOOST_MPL_PREPROCESSING_MODE)
  24 #   include <boost/mpl/arg.hpp>
  25 #   include <boost/mpl/aux_/adl_barrier.hpp>
  26
  27 #   if !defined(BOOST_MPL_CFG_NO_ADL_BARRIER_NAMESPACE)
  28 #       define BOOST_MPL_AUX_ARG_ADL_BARRIER_DECL(type) \
  29         using ::BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE::type; \
  30         /**/
  31 #   else
  32 #       define BOOST_MPL_AUX_ARG_ADL_BARRIER_DECL(type) /**/
  33 #   endif
  34
  35 #endif
  36
  37 #include <boost/mpl/aux_/config/use_preprocessed.hpp>
  38
  39 #if !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \
  40  && !defined(BOOST_MPL_PREPROCESSING_MODE)
  41
  42 #   define BOOST_MPL_PREPROCESSED_HEADER placeholders.hpp
  43 #   include <boost/mpl/aux_/include_preprocessed.hpp>
  44
  45 #else
  46
  47 #   include <boost/mpl/aux_/nttp_decl.hpp>
  48 #   include <boost/mpl/limits/arity.hpp>
  49 #   include <boost/preprocessor/iterate.hpp>
  50 #   include <boost/preprocessor/cat.hpp>
  51
  52 // watch out for GNU gettext users, who #define _(x)
  53 #if !defined(_) || defined(BOOST_MPL_CFG_NO_UNNAMED_PLACEHOLDER_SUPPORT)
  54 BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN
  55 typedef arg<-1> _;
  56 BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE
  57
  58 namespace boost { namespace mpl {
  59
  60 BOOST_MPL_AUX_ARG_ADL_BARRIER_DECL(_)
  61
  62 namespace placeholders {
  63 using BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE::_;
  64 }
  65
  66 }}
  67 #endif
  68
  69 /// agurt, 17/mar/02: one more placeholder for the last 'apply#'
  70 /// specialization
  71 #define BOOST_PP_ITERATION_PARAMS_1 \
  72     (3,(1, BOOST_MPL_LIMIT_METAFUNCTION_ARITY + 1, <boost/mpl/placeholders.hpp>))
  73 #include BOOST_PP_ITERATE()
  74
  75 #endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS
  76 #endif // BOOST_MPL_PLACEHOLDERS_HPP_INCLUDED
  77
  78 ///// iteration
  79
  80 #else
  81 #define i_ BOOST_PP_FRAME_ITERATION(1)
  82
  83 BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN
  84
  85 typedef arg<i_> BOOST_PP_CAT(_,i_);
  86
  87 BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE
  88
  89 namespace boost { namespace mpl {
  90
  91 BOOST_MPL_AUX_ARG_ADL_BARRIER_DECL(BOOST_PP_CAT(_,i_))
  92
  93 namespace placeholders {
  94 using BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE::BOOST_PP_CAT(_,i_);
  95 }
  96
  97 }}
  98
  99 #undef i_
 100 #endif // BOOST_PP_IS_ITERATING