ceph/src/boost/libs/spirit/include/boost/spirit/home/qi/detail/pass_function.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2011 Joel de Guzman
   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 #if !defined(SPIRIT_PASS_FUNCTION_FEBRUARY_05_2007_1138AM)
   8 #define SPIRIT_PASS_FUNCTION_FEBRUARY_05_2007_1138AM
   9
  10 #if defined(_MSC_VER)
  11 #pragma once
  12 #endif
  13
  14 #include <boost/spirit/home/support/unused.hpp>
  15 #include <boost/optional.hpp>
  16
  17 namespace boost { namespace spirit { namespace qi { namespace detail
  18 {
  19     template <typename Iterator, typename Context, typename Skipper>
  20     struct pass_function
  21     {
  22         pass_function(
  23             Iterator& first_, Iterator const& last_
  24           , Context& context_, Skipper const& skipper_)
  25           : first(first_)
  26           , last(last_)
  27           , context(context_)
  28           , skipper(skipper_)
  29         {
  30         }
  31
  32         template <typename Component, typename Attribute>
  33         bool operator()(Component const& component, Attribute& attr)
  34         {
  35             // return true if the parser succeeds
  36             return component.parse(first, last, context, skipper, attr);
  37         }
  38
  39         template <typename Component, typename Attribute>
  40         bool operator()(Component const& component, boost::optional<Attribute>& attr)
  41         {
  42             // return true if the parser succeeds
  43             Attribute val;
  44             if (component.parse(first, last, context, skipper, val))
  45             {
  46                 attr = val;
  47                 return true;
  48             }
  49             return false;
  50         }
  51
  52         template <typename Component>
  53         bool operator()(Component const& component)
  54         {
  55             // return true if the parser succeeds
  56             return component.parse(first, last, context, skipper, unused);
  57         }
  58
  59         Iterator& first;
  60         Iterator const& last;
  61         Context& context;
  62         Skipper const& skipper;
  63
  64     private:
  65         // silence MSVC warning C4512: assignment operator could not be generated
  66         pass_function& operator= (pass_function const&);
  67     };
  68 }}}}
  69
  70 #endif