ceph/src/boost/libs/serialization/include/boost/archive/iterators/unescape.hpp

   1 #ifndef BOOST_ARCHIVE_ITERATORS_UNESCAPE_HPP
   2 #define BOOST_ARCHIVE_ITERATORS_UNESCAPE_HPP
   3
   4 // MS compatible compilers support #pragma once
   5 #if defined(_MSC_VER)
   6 # pragma once
   7 #endif
   8
   9 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
  10 // unescape.hpp
  11
  12 // (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
  13 // Use, modification and distribution is subject to the Boost Software
  14 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  15 // http://www.boost.org/LICENSE_1_0.txt)
  16
  17 //  See http://www.boost.org for updates, documentation, and revision history.
  18
  19 #include <boost/assert.hpp>
  20
  21 #include <boost/iterator/iterator_adaptor.hpp>
  22 #include <boost/pointee.hpp>
  23
  24 namespace boost {
  25 namespace archive {
  26 namespace iterators {
  27
  28 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
  29 // class used by text archives to translate char strings to wchar_t
  30 // strings of the currently selected locale
  31 template<class Derived, class Base>
  32 class unescape
  33     : public boost::iterator_adaptor<
  34         unescape<Derived, Base>,
  35         Base,
  36         typename pointee<Base>::type,
  37         single_pass_traversal_tag,
  38         typename pointee<Base>::type
  39     >
  40 {
  41     friend class boost::iterator_core_access;
  42     typedef typename boost::iterator_adaptor<
  43         unescape<Derived, Base>,
  44         Base,
  45         typename pointee<Base>::type,
  46         single_pass_traversal_tag,
  47         typename pointee<Base>::type
  48     > super_t;
  49
  50     typedef unescape<Derived, Base> this_t;
  51 public:
  52     typedef typename this_t::value_type value_type;
  53     typedef typename this_t::reference reference;
  54 private:
  55     value_type dereference_impl() {
  56         if(! m_full){
  57             m_current_value = static_cast<Derived *>(this)->drain();
  58             m_full = true;
  59         }
  60         return m_current_value;
  61     }
  62
  63     reference dereference() const {
  64         return const_cast<this_t *>(this)->dereference_impl();
  65     }
  66
  67     value_type m_current_value;
  68     bool m_full;
  69
  70     void increment(){
  71         ++(this->base_reference());
  72         dereference_impl();
  73         m_full = false;
  74     };
  75
  76 public:
  77
  78     unescape(Base base) :
  79         super_t(base),
  80         m_full(false)
  81     {}
  82
  83 };
  84
  85 } // namespace iterators
  86 } // namespace archive
  87 } // namespace boost
  88
  89 #endif // BOOST_ARCHIVE_ITERATORS_UNESCAPE_HPP