blob: 2ec8aded80ff3be22d1716513bf3bf7f2f5b7243 (
plain) (
blame)
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
|
/*
* This source code is released into the public domain.
*/
module;
#include <coroutine>
#include <filesystem>
#include <format>
#include <map>
module nihil.config;
import nihil;
namespace nihil::config {
unknown_option::unknown_option(std::string_view option_name)
: error(std::format("unknown configuration variable '{}'",
option_name))
, _option_name(option_name)
{
}
auto unknown_option::option_name(this unknown_option const &self)
-> std::string_view
{
return self._option_name;
}
auto store::get()
-> store&
{
if (instance == nullptr)
instance = new store;
return *instance;
}
auto store::register_option(this store &self, option *object)
-> void
{
auto [it, okay] = self.options.insert(
std::pair{object->name(), object});
if (!okay)
throw error(std::format(
"INTERNAL ERROR: attempt to register "
"duplicate config value '{0}'",
object->name()));
}
auto store::unregister_option(this store &self, option *object)
-> void
{
auto it = self.options.find(object->name());
if (it == self.options.end())
throw error(std::format(
"INTERNAL ERROR: attempt to unregister "
"non-existent config value '{}'",
object->name()));
self.options.erase(it);
}
auto store::fetch(this store const &self, std::string_view name)
-> option &
{
if (auto it = self.options.find(name); it != self.options.end())
return *it->second;
throw unknown_option(name);
}
auto store::all(this store const &self)
-> nihil::generator<option const &>
{
for (auto &&it : self.options)
co_yield *it.second;
}
auto get_option(std::string_view option_name)
-> option &
{
return store::get().fetch(option_name);
}
} // namespace nihil::config
|
