ceph/src/boost/boost/spirit/home/karma/numeric/detail/bool_utils.hpp

   1 //  Copyright (c) 2001-2011 Hartmut Kaiser
   2 //
   3 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #if !defined(BOOST_SPIRIT_KARMA_BOOL_UTILS_SEP_28_2009_0644PM)
   7 #define BOOST_SPIRIT_KARMA_BOOL_UTILS_SEP_28_2009_0644PM
   8
   9 #if defined(_MSC_VER)
  10 #pragma once
  11 #endif
  12
  13 #include <boost/spirit/home/support/char_class.hpp>
  14 #include <boost/spirit/home/support/unused.hpp>
  15 #include <boost/spirit/home/karma/detail/generate_to.hpp>
  16 #include <boost/spirit/home/karma/detail/string_generate.hpp>
  17 #include <boost/spirit/home/karma/numeric/detail/numeric_utils.hpp>
  18 #include <boost/detail/workaround.hpp>
  19
  20 namespace boost { namespace spirit { namespace karma
  21 {
  22     ///////////////////////////////////////////////////////////////////////////
  23     //
  24     //  The bool_inserter template takes care of the boolean to string
  25     //  conversion. The Policies template parameter is used to allow
  26     //  customization of the formatting process
  27     //
  28     ///////////////////////////////////////////////////////////////////////////
  29     template <typename T>
  30     struct bool_policies;
  31
  32     template <typename T
  33       , typename Policies = bool_policies<T>
  34       , typename CharEncoding = unused_type
  35       , typename Tag = unused_type>
  36     struct bool_inserter
  37     {
  38         template <typename OutputIterator, typename U>
  39         static bool
  40         call (OutputIterator& sink, U b, Policies const& p = Policies())
  41         {
  42 #if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1600))
  43             p; // suppresses warning: C4100: 'p' : unreferenced formal parameter
  44 #endif
  45             return p.template call<bool_inserter>(sink, T(b), p);
  46         }
  47
  48         ///////////////////////////////////////////////////////////////////////
  49         //  This is the workhorse behind the real generator
  50         ///////////////////////////////////////////////////////////////////////
  51         template <typename OutputIterator, typename U>
  52         static bool
  53         call_n (OutputIterator& sink, U b, Policies const& p)
  54         {
  55 #if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1600))
  56             p; // suppresses warning: C4100: 'p' : unreferenced formal parameter
  57 #endif
  58             if (b)
  59                 return p.template generate_true<CharEncoding, Tag>(sink, b);
  60             return p.template generate_false<CharEncoding, Tag>(sink, b);
  61         }
  62     };
  63
  64 }}}
  65
  66 #endif
  67