ceph/src/boost/boost/spirit/home/lex/lexer/support_functions_expression.hpp

   1 //  Copyright (c) 2001-2011 Hartmut Kaiser
   2 //  Copyright (c)      2011 Thomas Heller
   3 //
   4 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
   5 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6
   7 #ifndef BOOST_SPIRIT_LEX_LEXER_SUPPORT_FUNCTIONS_EXPRESSION_HPP
   8 #define BOOST_SPIRIT_LEX_LEXER_SUPPORT_FUNCTIONS_EXPRESSION_HPP
   9
  10 #if defined(_MSC_VER)
  11 #pragma once
  12 #endif
  13
  14 #include <boost/phoenix/core/expression.hpp>
  15 #include <boost/phoenix/core/v2_eval.hpp>
  16 #include <boost/proto/proto_fwd.hpp> // for transform placeholders
  17
  18 namespace boost { namespace spirit { namespace lex
  19 {
  20     template <typename> struct less_type;
  21     struct more_type;
  22     template <typename, typename> struct lookahead_type;
  23 }}}
  24
  25 ///////////////////////////////////////////////////////////////////////////////
  26
  27 BOOST_PHOENIX_DEFINE_EXPRESSION(
  28     (boost)(spirit)(lex)(less)
  29   , (boost::phoenix::meta_grammar)
  30 )
  31
  32 BOOST_PHOENIX_DEFINE_EXPRESSION(
  33     (boost)(spirit)(lex)(lookahead)
  34   , (boost::phoenix::meta_grammar)
  35     (boost::phoenix::meta_grammar)
  36 )
  37
  38 namespace boost { namespace phoenix
  39 {
  40
  41     namespace result_of
  42     {
  43         template <>
  44         struct is_nullary<custom_terminal<boost::spirit::lex::more_type> >
  45           : mpl::false_
  46         {};
  47     }
  48
  49     template <typename Dummy>
  50     struct is_custom_terminal<boost::spirit::lex::more_type, Dummy> : mpl::true_ {};
  51
  52     template <typename Dummy>
  53     struct custom_terminal<boost::spirit::lex::more_type, Dummy>
  54         : proto::call<
  55             v2_eval(
  56                 proto::make<boost::spirit::lex::more_type()>
  57               , proto::call<functional::env(proto::_state)>
  58             )
  59         >
  60     {};
  61
  62
  63     template <typename Dummy>
  64     struct is_nullary::when<spirit::lex::rule::less, Dummy>
  65       : proto::make<mpl::false_()>
  66     {};
  67
  68     template <typename Dummy>
  69     struct default_actions::when<spirit::lex::rule::less, Dummy>
  70       : proto::call<
  71             v2_eval(
  72                 proto::make<
  73                     spirit::lex::less_type<proto::_child0>(proto::_child0)
  74                 >
  75               , _env
  76             )
  77         >
  78     {};
  79
  80     template <typename Dummy>
  81     struct is_nullary::when<spirit::lex::rule::lookahead, Dummy>
  82       : proto::make<mpl::false_()>
  83     {};
  84
  85     template <typename Dummy>
  86     struct default_actions::when<spirit::lex::rule::lookahead, Dummy>
  87       : proto::call<
  88             v2_eval(
  89                 proto::make<
  90                     spirit::lex::lookahead_type<
  91                         proto::_child0
  92                       , proto::_child1
  93                     >(
  94                         proto::_child0
  95                       , proto::_child1
  96                     )
  97                 >
  98               , _env
  99             )
 100         >
 101     {};
 102 }}
 103
 104 #endif