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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
// Copyright Catch2 Authors
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.txt or copy at
// https://www.boost.org/LICENSE_1_0.txt)
// SPDX-License-Identifier: BSL-1.0
#ifndef CATCH_APPROX_HPP_INCLUDED
#define CATCH_APPROX_HPP_INCLUDED
#include <catch2/catch_tostring.hpp>
#include <type_traits>
namespace Catch {
class Approx {
private:
bool equalityComparisonImpl(double other) const;
// Sets and validates the new margin (margin >= 0)
void setMargin(double margin);
// Sets and validates the new epsilon (0 < epsilon < 1)
void setEpsilon(double epsilon);
public:
explicit Approx ( double value );
static Approx custom();
Approx operator-() const;
template <typename T, typename = std::enable_if_t<std::is_constructible<double, T>::value>>
Approx operator()( T const& value ) const {
Approx approx( static_cast<double>(value) );
approx.m_epsilon = m_epsilon;
approx.m_margin = m_margin;
approx.m_scale = m_scale;
return approx;
}
template <typename T, typename = std::enable_if_t<std::is_constructible<double, T>::value>>
explicit Approx( T const& value ): Approx(static_cast<double>(value))
{}
template <typename T, typename = std::enable_if_t<std::is_constructible<double, T>::value>>
friend bool operator == ( const T& lhs, Approx const& rhs ) {
auto lhs_v = static_cast<double>(lhs);
return rhs.equalityComparisonImpl(lhs_v);
}
template <typename T, typename = std::enable_if_t<std::is_constructible<double, T>::value>>
friend bool operator == ( Approx const& lhs, const T& rhs ) {
return operator==( rhs, lhs );
}
template <typename T, typename = std::enable_if_t<std::is_constructible<double, T>::value>>
friend bool operator != ( T const& lhs, Approx const& rhs ) {
return !operator==( lhs, rhs );
}
template <typename T, typename = std::enable_if_t<std::is_constructible<double, T>::value>>
friend bool operator != ( Approx const& lhs, T const& rhs ) {
return !operator==( rhs, lhs );
}
template <typename T, typename = std::enable_if_t<std::is_constructible<double, T>::value>>
friend bool operator <= ( T const& lhs, Approx const& rhs ) {
return static_cast<double>(lhs) < rhs.m_value || lhs == rhs;
}
template <typename T, typename = std::enable_if_t<std::is_constructible<double, T>::value>>
friend bool operator <= ( Approx const& lhs, T const& rhs ) {
return lhs.m_value < static_cast<double>(rhs) || lhs == rhs;
}
template <typename T, typename = std::enable_if_t<std::is_constructible<double, T>::value>>
friend bool operator >= ( T const& lhs, Approx const& rhs ) {
return static_cast<double>(lhs) > rhs.m_value || lhs == rhs;
}
template <typename T, typename = std::enable_if_t<std::is_constructible<double, T>::value>>
friend bool operator >= ( Approx const& lhs, T const& rhs ) {
return lhs.m_value > static_cast<double>(rhs) || lhs == rhs;
}
template <typename T, typename = std::enable_if_t<std::is_constructible<double, T>::value>>
Approx& epsilon( T const& newEpsilon ) {
const auto epsilonAsDouble = static_cast<double>(newEpsilon);
setEpsilon(epsilonAsDouble);
return *this;
}
template <typename T, typename = std::enable_if_t<std::is_constructible<double, T>::value>>
Approx& margin( T const& newMargin ) {
const auto marginAsDouble = static_cast<double>(newMargin);
setMargin(marginAsDouble);
return *this;
}
template <typename T, typename = std::enable_if_t<std::is_constructible<double, T>::value>>
Approx& scale( T const& newScale ) {
m_scale = static_cast<double>(newScale);
return *this;
}
std::string toString() const;
private:
double m_epsilon;
double m_margin;
double m_scale;
double m_value;
};
namespace literals {
Approx operator ""_a(long double val);
Approx operator ""_a(unsigned long long val);
} // end namespace literals
template<>
struct StringMaker<Catch::Approx> {
static std::string convert(Catch::Approx const& value);
};
} // end namespace Catch
#endif // CATCH_APPROX_HPP_INCLUDED
|
