ceph/src/boost/boost/spirit/home/x3/numeric/bool_policies.hpp

   1 /*=============================================================================
   2     Copyright (c) 2009  Hartmut Kaiser
   3     Copyright (c) 2014  Joel de Guzman
   4
   5     Distributed under the Boost Software License, Version 1.0. (See accompanying
   6     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   7 ==============================================================================*/
   8 #if !defined(SPIRIT_QI_BOOL_POLICIES_SEP_29_2009_0710AM)
   9 #define SPIRIT_QI_BOOL_POLICIES_SEP_29_2009_0710AM
  10
  11 #include <boost/spirit/home/x3/string/detail/string_parse.hpp>
  12 #include <boost/spirit/home/x3/support/traits/move_to.hpp>
  13
  14 namespace boost { namespace spirit { namespace x3
  15 {
  16     ///////////////////////////////////////////////////////////////////////////
  17     //  Default boolean policies
  18     ///////////////////////////////////////////////////////////////////////////
  19     template <typename T = bool>
  20     struct bool_policies
  21     {
  22         template <typename Iterator, typename Attribute, typename CaseCompare>
  23         static bool
  24         parse_true(Iterator& first, Iterator const& last, Attribute& attr_, CaseCompare const& case_compare)
  25         {
  26             if (detail::string_parse("true", first, last, unused, case_compare))
  27             {
  28                 traits::move_to(T(true), attr_);    // result is true
  29                 return true;
  30             }
  31             return false;
  32         }
  33
  34         template <typename Iterator, typename Attribute, typename CaseCompare>
  35         static bool
  36         parse_false(Iterator& first, Iterator const& last, Attribute& attr_, CaseCompare const& case_compare)
  37         {
  38             if (detail::string_parse("false", first, last, unused, case_compare))
  39             {
  40                 traits::move_to(T(false), attr_);   // result is false
  41                 return true;
  42             }
  43             return false;
  44         }
  45     };
  46 }}}
  47
  48 #endif