ceph/src/boost/boost/spirit/home/karma/detail/unused_delimiter.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_UNUSED_DELIMITER_MAR_15_2009_0923PM)
   7 #define BOOST_SPIRIT_KARMA_UNUSED_DELIMITER_MAR_15_2009_0923PM
   8
   9 #if defined(_MSC_VER)
  10 #pragma once
  11 #endif
  12
  13 #include <boost/spirit/home/support/unused.hpp>
  14
  15 namespace boost { namespace spirit { namespace karma { namespace detail
  16 {
  17     template <typename Delimiter>
  18     struct unused_delimiter : unused_type
  19     {
  20         unused_delimiter(Delimiter const& delim)
  21           : delimiter(delim) {}
  22         Delimiter const& delimiter;
  23
  24         // silence MSVC warning C4512: assignment operator could not be generated
  25         BOOST_DELETED_FUNCTION(unused_delimiter& operator= (unused_delimiter const&))
  26     };
  27
  28     // If a surrounding verbatim[] directive was specified, the current
  29     // delimiter is of the type unused_delimiter. In this case we
  30     // re-activate the delimiter which was active before the verbatim[]
  31     // directive.
  32     template <typename Delimiter, typename Default>
  33     inline Delimiter const&
  34     get_delimiter(unused_delimiter<Delimiter> const& u, Default const&)
  35     {
  36         return u.delimiter;
  37     }
  38
  39     // If no surrounding verbatim[] directive was specified we activate
  40     // a single space as the delimiter to use.
  41     template <typename Delimiter, typename Default>
  42     inline Default const&
  43     get_delimiter(Delimiter const&, Default const& d)
  44     {
  45         return d;
  46     }
  47
  48 }}}}
  49
  50 #endif