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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
* This source code is released into the public domain.
*/
module;
#include <cassert>
#include <cstdlib>
#include <string>
#include <ucl.h>
export module nihil.ucl:string;
import :object;
namespace nihil::ucl {
export struct string final : object {
using value_type = std::string_view;
inline static constexpr object_type ucl_type = object_type::string;
// Create a new string from a UCL object.
string(ref_t, ::ucl_object_t const *uobj)
: object(nihil::ucl::ref, uobj)
{
if (type() != ucl_type)
throw type_mismatch(ucl_type, type());
}
string(noref_t, ::ucl_object_t *uobj)
: object(noref, uobj)
{
if (type() != ucl_type)
throw type_mismatch(ucl_type, type());
}
// Create a new empty string.
string()
: string(std::string_view(""))
{}
// Create a new UCL string from a string.
explicit string(std::string_view value)
: object(nihil::ucl::ref,
::ucl_object_fromstring_common(
value.data(), value.size(),
UCL_STRING_RAW))
{
if (_object == nullptr)
throw error("failed to create UCL object");
}
// Create a new UCL string from an iterator pair.
template<std::contiguous_iterator Iterator>
string(Iterator first, Iterator last)
: string(std::string_view(first, last))
{}
template<std::input_iterator Iterator>
requires(!std::contiguous_iterator<Iterator>)
string(Iterator first, Iterator last)
: string(std::string(first, last))
{}
// Create a new UCL string from a range.
string(std::from_range_t, std::ranges::range auto &&range)
: string(std::ranges::begin(range),
std::ranges::end(range))
{}
// Return the value of this string.
auto value(this string const &self) -> value_type
{
char const *dptr{};
std::size_t dlen;
auto const *uobj = self.get_ucl_object();
if (::ucl_object_tolstring_safe(uobj, &dptr, &dlen))
return {dptr, dlen};
// This should never fail.
std::abort();
}
};
/*
* Comparison operators.
*/
export auto operator== (string const &a, string const &b)
-> bool
{
return a.value() == b.value();
}
export auto operator<=> (string const &a, string const &b)
-> std::strong_ordering
{
return a.value() <=> b.value();
}
/*
* For convenience, allow comparison with C++ strings without having to
* construct a temporary UCL object.
*/
export auto operator==(string const &lhs, std::string_view rhs) -> bool
{
return lhs.value() == rhs;
}
export auto operator<=>(string const &lhs, std::string_view rhs)
-> std::strong_ordering
{
return lhs.value() <=> rhs;
}
export auto operator==(string const &lhs, std::string const &rhs) -> bool
{
return lhs == std::string_view(rhs);
}
export auto operator<=>(string const &lhs, std::string const &rhs)
-> std::strong_ordering
{
return lhs <=> std::string_view(rhs);
}
export auto operator==(string const &lhs, char const *rhs) -> bool
{
return lhs == std::string_view(rhs);
}
export auto operator<=>(string const &lhs, char const *rhs)
-> std::strong_ordering
{
return lhs <=> std::string_view(rhs);
}
} // namespace nihil::ucl
|
