1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
// Boost.Bimap
//
// Copyright (c) 2024 Joaquin M Lopez Munoz
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef LIBS_BIMAP_TEST_STRONG_TYPE_HPP
#define LIBS_BIMAP_TEST_STRONG_TYPE_HPP
#if defined(_MSC_VER)
#pragma once
#endif
#include <boost/container_hash/hash.hpp>
// std
#include <cstddef>
#include <stdexcept>
template< class T >
struct strong
{
template< class Q >
strong(const Q& x_):x(x_){}
T x;
};
template< class T >
bool operator<(const strong<T>& x,const strong<T>& y)
{
return x.x<y.x;
}
template< class T >
bool operator==(const strong<T>& x,const strong<T>& y)
{
return x.x==y.x;
}
template< class T >
std::size_t hash_value(const strong<T>& x)
{
return boost::hash<T>()(x.x);
}
template< class T >
struct semistrong: strong<T>
{
using strong<T>::strong;
// semistrong<T> is formally convertible to T but throws when
// conversion actually called
operator const T&() const
{
throw std::runtime_error("semistrong<T> -> T conversion called");
}
};
#endif // LIBS_BIMAP_TEST_STRONG_TYPE_HPP
|
