blob: facbf2c7b4ee254b5a29864df1167ddd23405172 (
plain)
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
|
/*
* File: opt.hpp
* Author: Amlal El Mahrouss,
* Copyright 2023-2025, Amlal El Mahrouss/SNU Systems Corp all rights reserved.
*/
#ifndef _SNU_OPT_HPP
#define _SNU_OPT_HPP
#include <lib/detail/error.hpp>
#include <utility>
namespace snu::opt
{
enum class return_type
{
invalid = 0,
okay = 100,
err,
count = err - okay + 1,
};
struct opt final
{
explicit opt(const return_type& return_type)
: m_ret(return_type)
{
}
opt& expect(const char* input)
{
if (m_ret == return_type::err)
{
throw std::runtime_error(input);
}
return *this;
}
private:
return_type m_ret;
};
template <typename Teller, typename... Lst>
inline return_type eval(Teller tell, Lst&&... arg)
{
return tell(std::forward<Lst>(arg)...) ? return_type::okay : return_type::err;
}
namespace traits
{
struct int_eq_teller
{
explicit int_eq_teller()
{
}
bool operator()(int a, int b)
{
return (a == b);
}
};
struct int_greater_than_teller
{
explicit int_greater_than_teller()
{
}
bool operator()(int a, int b)
{
return (a > b);
}
};
struct int_less_than_teller
{
explicit int_less_than_teller()
{
}
bool operator()(int a, int b)
{
return (a < b);
}
};
} // namespace traits
template <typename... Lst>
inline return_type eval_less_than(Lst&&... arg)
{
static traits::int_less_than_teller eq;
return eq(std::forward<Lst>(arg)...) ? return_type::okay : return_type::err;
}
template <typename... Lst>
inline return_type eval_eq(Lst&&... arg)
{
static traits::int_eq_teller less_than;
return less_than(std::forward<Lst>(arg)...) ? return_type::okay : return_type::err;
}
template <typename... Lst>
inline return_type eval_greater_than(Lst&&... arg)
{
static traits::int_greater_than_teller greater_than;
return greater_than(std::forward<Lst>(arg)...) ? return_type::okay : return_type::err;
}
inline return_type eval_true()
{
return return_type::okay;
}
inline return_type eval_false()
{
return return_type::err;
}
} // namespace snu::opt
#endif /* ifndef _SNU_OPT_HPP */
|
