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3rdparty/boost_1_81_0/boost/phoenix/object/construct.hpp 2.34 KB
0b6a182c   Hu Chunming   添加无鉴权注册和注销
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  /*==============================================================================
      Copyright (c) 2001-2010 Joel de Guzman
      Copyright (c) 2010 Thomas Heller
  
      Distributed under the Boost Software License, Version 1.0. (See accompanying
      file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  ==============================================================================*/
  #ifndef BOOST_PHOENIX_OBJECT_CONSTRUCT_HPP
  #define BOOST_PHOENIX_OBJECT_CONSTRUCT_HPP
  
  #include <boost/phoenix/core/limits.hpp>
  #include <boost/phoenix/core/call.hpp>
  #include <boost/phoenix/core/expression.hpp>
  #include <boost/phoenix/core/meta_grammar.hpp>
  #include <boost/phoenix/object/detail/target.hpp>
  #include <boost/phoenix/support/iterate.hpp>
  #include <boost/preprocessor/repetition/repeat_from_to.hpp>
  
  #ifdef BOOST_PHOENIX_NO_VARIADIC_EXPRESSION
  #   include <boost/phoenix/object/detail/cpp03/construct_expr.hpp>
  #else
  BOOST_PHOENIX_DEFINE_EXPRESSION_VARARG(
      (boost)(phoenix)(construct)
    , (proto::terminal<detail::target<proto::_> >)
      (meta_grammar)
    , _
  )
  #endif
  
  namespace boost { namespace phoenix
  {
      struct construct_eval
      {
          template <typename Sig>
          struct result;
  
  #if defined(BOOST_PHOENIX_NO_VARIADIC_OBJECT)
          template <typename This, typename A0, typename Context>
          struct result<This(A0, Context)>
              : detail::result_of::target<A0>
          {
          };
  
          template <typename Target, typename Context>
          typename detail::result_of::target<Target>::type
          operator()(Target, Context const &) const
          {
              return typename detail::result_of::target<Target>::type();
          }
  
          // Bring in the rest
          #include <boost/phoenix/object/detail/cpp03/construct_eval.hpp>
  #else
          // TODO:
  #endif
      };
  
      template <typename Dummy>
      struct default_actions::when<rule::construct, Dummy>
          : call<construct_eval, Dummy>
      {};
  
  #if defined(BOOST_PHOENIX_NO_VARIADIC_OBJECT)
      template <typename T>
      inline
      typename expression::construct<detail::target<T> >::type const
      construct()
      {
          return
              expression::
                  construct<detail::target<T> >::
                      make(detail::target<T>());
      }
  
      // Bring in the rest
      #include <boost/phoenix/object/detail/cpp03/construct.hpp>
  #else
      // TODO:
  #endif
  }}
  
  #endif