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
use Rational;
use serde::de::{Deserialize, Deserializer, Error as DeError};
use serde::ser::{Serialize, Serializer};
use serdeize::{self, Data, PrecReq, PrecVal};
impl Serialize for Rational {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
let prec = PrecVal::Zero;
let radix = if self.numer().significant_bits() <= 32
&& self.denom().significant_bits() <= 32
{
10
} else {
16
};
let value = self.to_string_radix(radix);
serdeize::serialize(
"Rational",
&Data { prec, radix, value },
serializer,
)
}
}
impl<'de> Deserialize<'de> for Rational {
fn deserialize<D>(deserializer: D) -> Result<Rational, D::Error>
where
D: Deserializer<'de>,
{
let (radix, value) = de_data(deserializer)?;
Rational::from_str_radix(&value, radix).map_err(DeError::custom)
}
fn deserialize_in_place<D>(
deserializer: D,
place: &mut Rational,
) -> Result<(), D::Error>
where
D: Deserializer<'de>,
{
let (radix, value) = de_data(deserializer)?;
place
.assign_str_radix(&value, radix)
.map_err(DeError::custom)
}
}
fn de_data<'de, D>(deserializer: D) -> Result<(i32, String), D::Error>
where
D: Deserializer<'de>,
{
let Data { prec, radix, value } =
serdeize::deserialize("Rational", PrecReq::Zero, deserializer)?;
match prec {
PrecVal::Zero => {}
#[cfg(feature = "float")]
_ => unreachable!(),
}
serdeize::check_range("radix", radix, 2, 36)?;
Ok((radix, value))
}
#[cfg(test)]
mod tests {
use {Assign, Rational};
use serde_test::{self, Token};
enum Check<'a> {
SerDe(&'a Rational),
De(&'a Rational),
DeError(&'a str),
}
impl<'a> Check<'a> {
fn check(self, radix: i32, value: &'static str) {
let tokens = [
Token::Struct {
name: "Rational",
len: 2,
},
Token::Str("radix"),
Token::I32(radix),
Token::Str("value"),
Token::Str(value),
Token::StructEnd,
];
match self {
Check::SerDe(r) => serde_test::assert_tokens(r, &tokens),
Check::De(r) => serde_test::assert_de_tokens(r, &tokens),
Check::DeError(msg) => {
serde_test::assert_de_tokens_error::<Rational>(&tokens, msg)
}
}
}
}
#[test]
fn check() {
Check::DeError("radix 1 less than minimum 2").check(1, "0");
Check::DeError("radix 37 greater than maximum 36").check(37, "0");
let mut r = Rational::new();
Check::SerDe(&r).check(10, "0");
Check::De(&r).check(10, "+0/1");
r.assign((11_i64, -0xffff_ffff_i64));
Check::SerDe(&r).check(10, "-11/4294967295");
Check::De(&r).check(16, "-b/ffffffff");
Check::De(&r).check(16, "-b0/ffffffff0");
r.assign((-11_i64, -0x1_0000_0000_i64));
Check::SerDe(&r).check(16, "b/100000000");
}
}