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
24namespace boost {
25namespace archive {
26namespace 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
31template<class Derived, class Base>
32class 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;
51public:
52 typedef typename this_t::value_type value_type;
53 typedef typename this_t::reference reference;
54private:
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
76public:
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
90

source code of boost/libs/serialization/include/boost/archive/iterators/unescape.hpp