ceph/src/boost/libs/metaparse/include/boost/metaparse/v1/util/is_digit.hpp

   1 #ifndef BOOST_METAPARSE_V1_UTIL_IS_DIGIT_HPP
   2 #define BOOST_METAPARSE_V1_UTIL_IS_DIGIT_HPP
   3
   4 // Copyright Abel Sinkovics (abel@sinkovics.hu)  2009 - 2010.
   5 // Distributed under the Boost Software License, Version 1.0.
   6 //    (See accompanying file LICENSE_1_0.txt or copy at
   7 //          http://www.boost.org/LICENSE_1_0.txt)
   8
   9 #include <boost/metaparse/v1/util/in_range_c.hpp>
  10
  11 #include <boost/mpl/vector.hpp>
  12
  13 namespace boost
  14 {
  15   namespace metaparse
  16   {
  17     namespace v1
  18     {
  19       namespace util
  20       {
  21         template <class C = boost::mpl::na>
  22         struct is_digit : in_range_c<char, '0', '9'>::apply<C> {};
  23
  24         template <>
  25         struct is_digit<boost::mpl::na>
  26         {
  27           typedef is_digit type;
  28
  29           template <class C = boost::mpl::na>
  30           struct apply : is_digit<C> {};
  31         };
  32       }
  33     }
  34   }
  35 }
  36
  37 #endif
  38