ceph/src/boost/libs/proto/include/boost/proto/transform/detail/make.hpp

   1 #if !defined(BOOST_PROTO_DONT_USE_PREPROCESSED_FILES)
   2
   3     #include <boost/proto/transform/detail/preprocessed/make.hpp>
   4
   5 #elif !defined(BOOST_PP_IS_ITERATING)
   6
   7     #define BOOST_PROTO_MAKE_IF(Z, M, DATA)                                                         \
   8         make_if_<BOOST_PP_CAT(A, M), Expr, State, Data>                                             \
   9         /**/
  10
  11     #define BOOST_PROTO_MAKE_IF_TYPE(Z, M, DATA)                                                    \
  12         typename BOOST_PROTO_MAKE_IF(Z, M, DATA) ::type                                             \
  13         /**/
  14
  15     #define BOOST_PROTO_MAKE_IF_APPLIED(Z, M, DATA)                                                 \
  16         BOOST_PROTO_MAKE_IF(Z, M, DATA) ::applied ||                                                \
  17         /**/
  18
  19     #define BOOST_PROTO_CONSTRUCT_ARG(Z, M, DATA)                                                   \
  20         detail::as_lvalue(                                                                          \
  21             typename when<_, BOOST_PP_CAT(A, M)>::template impl<Expr, State, Data>()(e, s, d)       \
  22         )                                                                                           \
  23         /**/
  24
  25     #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
  26         #pragma wave option(preserve: 2, line: 0, output: "preprocessed/make.hpp")
  27     #endif
  28
  29     ///////////////////////////////////////////////////////////////////////////////
  30     /// \file make.hpp
  31     /// Contains definition of the make<> transform.
  32     //
  33     //  Copyright 2008 Eric Niebler. Distributed under the Boost
  34     //  Software License, Version 1.0. (See accompanying file
  35     //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  36
  37     #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
  38         #pragma wave option(preserve: 1)
  39     #endif
  40
  41     #define BOOST_PP_ITERATION_PARAMS_1                                                             \
  42         (3, (0, BOOST_PROTO_MAX_ARITY, <boost/proto/transform/detail/make.hpp>))
  43     #include BOOST_PP_ITERATE()
  44
  45     #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
  46         #pragma wave option(output: null)
  47     #endif
  48
  49     #undef BOOST_PROTO_CONSTRUCT_ARG
  50     #undef BOOST_PROTO_MAKE_IF_APPLIED
  51     #undef BOOST_PROTO_MAKE_IF_TYPE
  52     #undef BOOST_PROTO_MAKE_IF
  53
  54 #else
  55
  56     #define N BOOST_PP_ITERATION()
  57
  58     namespace detail
  59     {
  60         #if N > 0
  61
  62         template<
  63             template<BOOST_PP_ENUM_PARAMS(N, typename BOOST_PP_INTERCEPT)> class R
  64             BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)
  65           , typename Expr, typename State, typename Data
  66         >
  67         struct make_<
  68             R<BOOST_PP_ENUM_PARAMS(N, A)>
  69           , Expr, State, Data
  70             BOOST_PROTO_TEMPLATE_ARITY_PARAM(N)
  71         >
  72           : nested_type_if<
  73                 R<BOOST_PP_ENUM(N, BOOST_PROTO_MAKE_IF_TYPE, ~)>
  74               , (BOOST_PP_REPEAT(N, BOOST_PROTO_MAKE_IF_APPLIED, ~) false)
  75             >
  76         {};
  77
  78         template<
  79             template<BOOST_PP_ENUM_PARAMS(N, typename BOOST_PP_INTERCEPT)> class R
  80             BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)
  81           , typename Expr, typename State, typename Data
  82         >
  83         struct make_<
  84             noinvoke<R<BOOST_PP_ENUM_PARAMS(N, A)> >
  85           , Expr, State, Data
  86             BOOST_PROTO_TEMPLATE_ARITY_PARAM(1)
  87         >
  88         {
  89             typedef R<BOOST_PP_ENUM(N, BOOST_PROTO_MAKE_IF_TYPE, ~)> type;
  90             static bool const applied = true;
  91         };
  92
  93         #endif
  94
  95         template<typename R BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
  96         struct is_applyable<R(BOOST_PP_ENUM_PARAMS(N, A))>
  97           : mpl::true_
  98         {};
  99
 100         template<typename R BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
 101         struct is_applyable<R(*)(BOOST_PP_ENUM_PARAMS(N, A))>
 102           : mpl::true_
 103         {};
 104
 105         template<typename T, typename A>
 106         struct construct_<proto::expr<T, A, N>, true>
 107         {
 108             typedef proto::expr<T, A, N> result_type;
 109
 110             template<BOOST_PP_ENUM_PARAMS(BOOST_PP_MAX(N, 1), typename A)>
 111             BOOST_FORCEINLINE
 112             result_type operator ()(BOOST_PP_ENUM_BINARY_PARAMS(BOOST_PP_MAX(N, 1), A, &a)) const
 113             {
 114                 return result_type::make(BOOST_PP_ENUM_PARAMS(BOOST_PP_MAX(N, 1), a));
 115             }
 116         };
 117
 118         template<typename T, typename A>
 119         struct construct_<proto::basic_expr<T, A, N>, true>
 120         {
 121             typedef proto::basic_expr<T, A, N> result_type;
 122
 123             template<BOOST_PP_ENUM_PARAMS(BOOST_PP_MAX(N, 1), typename A)>
 124             BOOST_FORCEINLINE
 125             result_type operator ()(BOOST_PP_ENUM_BINARY_PARAMS(BOOST_PP_MAX(N, 1), A, &a)) const
 126             {
 127                 return result_type::make(BOOST_PP_ENUM_PARAMS(BOOST_PP_MAX(N, 1), a));
 128             }
 129         };
 130
 131         template<typename Type BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
 132         BOOST_FORCEINLINE
 133         Type construct(BOOST_PP_ENUM_BINARY_PARAMS(N, A, &a))
 134         {
 135             return construct_<Type>()(BOOST_PP_ENUM_PARAMS(N, a));
 136         }
 137
 138     } // namespace detail
 139
 140     /// \brief A PrimitiveTransform which computes a type by evaluating any
 141     /// nested transforms and then constructs an object of that type with the
 142     /// current expression, state and data, transformed according
 143     /// to \c A0 through \c AN.
 144     template<typename Object BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
 145     struct make<Object(BOOST_PP_ENUM_PARAMS(N, A))>
 146       : transform<make<Object(BOOST_PP_ENUM_PARAMS(N, A))> >
 147     {
 148         template<typename Expr, typename State, typename Data>
 149         struct impl : transform_impl<Expr, State, Data>
 150         {
 151             /// \brief <tt>boost::result_of\<make\<Object\>(Expr, State, Data)\>::type</tt>
 152             typedef typename detail::make_if_<Object, Expr, State, Data>::type result_type;
 153
 154             /// Let \c ax be <tt>when\<_, Ax\>()(e, s, d)</tt>
 155             /// for each \c x in <tt>[0,N]</tt>.
 156             /// Return <tt>result_type(a0, a1,... aN)</tt>.
 157             ///
 158             /// \param e The current expression
 159             /// \param s The current state
 160             /// \param d An arbitrary data
 161             BOOST_FORCEINLINE
 162             result_type operator ()(
 163                 typename impl::expr_param   e
 164               , typename impl::state_param  s
 165               , typename impl::data_param   d
 166             ) const
 167             {
 168                 proto::detail::ignore_unused(e);
 169                 proto::detail::ignore_unused(s);
 170                 proto::detail::ignore_unused(d);
 171                 return detail::construct<result_type>(BOOST_PP_ENUM(N, BOOST_PROTO_CONSTRUCT_ARG, DATA));
 172             }
 173         };
 174     };
 175
 176     #if N > 0
 177     /// \brief A PrimitiveTransform which computes a type by evaluating any
 178     /// nested transforms and then constructs an object of that type with the
 179     /// current expression, state and data, transformed according
 180     /// to \c A0 through \c AN.
 181     template<typename Object BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
 182     struct make<Object(BOOST_PP_ENUM_PARAMS(N, A)...)>
 183       : transform<make<Object(BOOST_PP_ENUM_PARAMS(N, A)...)> >
 184     {
 185         template<typename Expr, typename State, typename Data>
 186         struct impl
 187           : make<
 188                 typename detail::expand_pattern<
 189                     proto::arity_of<Expr>::value
 190                   , BOOST_PP_CAT(A, BOOST_PP_DEC(N))
 191                   , detail::BOOST_PP_CAT(expand_pattern_rest_, BOOST_PP_DEC(N))<
 192                         Object
 193                         BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_DEC(N), A)
 194                     >
 195                 >::type
 196             >::template impl<Expr, State, Data>
 197         {};
 198     };
 199     #endif
 200     #undef N
 201
 202 #endif