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
143
144
145
146
147
148
use std::fmt::Display;
use syn::{Meta, Token, punctuated::Punctuated};
use crate::{
common::{
allow::Allow,
range::RangedNumber,
range_option::{RangeOption, RangeTokenStream},
rocket_options::RocketOptions,
serde_options::SerdeOptions,
tri_allow::TriAllow,
},
panic,
};
pub(crate) struct NumberAttribute {
pub(crate) range: RangeTokenStream,
pub(crate) nan: TriAllow,
pub(crate) conflict: Allow,
#[cfg_attr(not(feature = "serde"), allow(dead_code))]
pub(crate) serde_options: SerdeOptions,
#[cfg_attr(not(feature = "rocket"), allow(dead_code))]
pub(crate) rocket_options: RocketOptions,
}
impl NumberAttribute {
pub(crate) fn build_from_meta<T: RangedNumber>(meta: &Meta) -> syn::Result<Self>
where
T::Err: Display, {
let correct_parameters = ["range", "nan", "conflict", "serde", "rocket"];
let mut range = RangeTokenStream::Unlimited;
let mut nan = TriAllow::Allow;
let mut conflict = Allow::Disallow;
let mut serde_options = SerdeOptions::default();
let mut rocket_options = RocketOptions::default();
match meta {
Meta::Path(_) => (),
Meta::NameValue(_) => {
return Err(panic::attribute_incorrect_format(meta.path()));
},
Meta::List(list) => {
let result =
list.parse_args_with(Punctuated::<Meta, Token![,]>::parse_terminated)?;
let mut range_is_set = false;
let mut nan_is_set = false;
let mut conflict_is_set = false;
let mut serde_options_is_set = false;
let mut rocket_options_is_set = false;
let mut handler = |meta: &Meta| -> syn::Result<bool> {
if let Some(ident) = meta.path().get_ident() {
match ident.to_string().as_str() {
"range" => {
let v = RangeOption::<T>::from_meta(meta)?;
if range_is_set {
return Err(panic::parameter_reset(ident));
}
range_is_set = true;
range = v.into();
return Ok(true);
},
"nan" => {
let v = TriAllow::from_meta(meta)?;
if nan_is_set {
return Err(panic::parameter_reset(ident));
}
nan_is_set = true;
nan = v;
return Ok(true);
},
"conflict" => {
let v = Allow::from_meta(meta)?;
if conflict_is_set {
return Err(panic::parameter_reset(ident));
}
conflict_is_set = true;
conflict = v;
return Ok(true);
},
"serde" => {
let v = SerdeOptions::from_meta(meta)?;
if serde_options_is_set {
return Err(panic::parameter_reset(ident));
}
serde_options_is_set = true;
serde_options = v;
return Ok(true);
},
"rocket" => {
let v = RocketOptions::from_meta(meta)?;
if rocket_options_is_set {
return Err(panic::parameter_reset(ident));
}
rocket_options_is_set = true;
rocket_options = v;
return Ok(true);
},
_ => (),
}
}
Ok(false)
};
for p in result {
if !handler(&p)? {
return Err(panic::parameter_incorrect_format(
p.path(),
&correct_parameters,
));
}
}
},
}
Ok(Self {
range,
nan,
conflict,
serde_options,
rocket_options,
})
}
}