1#ifndef BOOST_SERIALIZATION_LIBRARY_VERSION_TYPE_HPP
2#define BOOST_SERIALIZATION_LIBRARY_VERSION_TYPE_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// library_version_type.hpp:
11
12// (C) Copyright 2002-2020 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#include <cstring> // count
19#include <boost/cstdint.hpp> // uint_least16_t
20#include <boost/assert.hpp>
21#include <boost/config.hpp>
22#include <boost/integer_traits.hpp>
23
24namespace boost {
25namespace serialization {
26
27#if defined(_MSC_VER)
28#pragma warning( push )
29#pragma warning( disable : 4244 4267 )
30#endif
31
32/* NOTE : Warning : Warning : Warning : Warning : Warning
33 * Don't ever changes this. If you do, they previously created
34 * binary archives won't be readable !!!
35 */
36class library_version_type {
37private:
38 typedef uint_least16_t base_type;
39 base_type t;
40public:
41 library_version_type(): t(0) {}
42 explicit library_version_type(const unsigned int & t_) : t(t_){
43 BOOST_ASSERT(t_ <= boost::integer_traits<base_type>::const_max);
44 }
45 library_version_type(const library_version_type & t_) :
46 t(t_.t)
47 {}
48 library_version_type & operator=(const library_version_type & rhs){
49 t = rhs.t;
50 return *this;
51 }
52 // used for text output
53 operator base_type () const {
54 return t;
55 }
56 // used for text input
57 operator base_type & (){
58 return t;
59 }
60 bool operator==(const library_version_type & rhs) const {
61 return t == rhs.t;
62 }
63 bool operator<(const library_version_type & rhs) const {
64 return t < rhs.t;
65 }
66};
67
68} // serialization
69} // boost
70
71#endif // BOOST_SERIALIZATION_LIBRARY_VERSION_TYPE_HPP
72

source code of include/boost/serialization/library_version_type.hpp