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
#[macro_export]
macro_rules! stringify {
($(($k:expr, $v:expr)),*) => {{
let mut s = String::new();
$(
if s.len() > 0 {
s.push('&');
}
s.push_str(&format!("{}={}", $k, $v).to_string());
)*
s
}};
($m:expr) => {{
let mut s = String::new();
for (k, v) in $m.iter() {
if s.len() > 0 {
s.push('&');
}
s.push_str(&format!("{}={}", k.to_string(), v.to_string()).to_string());
}
s
}};
($($k:expr => $v:expr),*) => {{
let mut s = String::new();
$(
if s.len() > 0 {
s.push('&');
}
s.push_str(&format!("{}={}", $k, $v).to_string());
)*
s
}};
}
#[cfg(test)]
mod tests {
use std::collections::BTreeMap;
#[test]
fn test_stringify_common() {
let s = stringify!(
"a" => 1,
"b" => 2,
"c" => 3
);
assert_eq!(s, "a=1&b=2&c=3");
}
#[test]
fn test_stringify_map() {
let mut m = BTreeMap::new();
m.insert("a", 1);
m.insert("b", 2);
m.insert("c", 3);
let s = stringify!(m);
assert_eq!(s, "a=1&b=2&c=3");
}
#[test]
fn test_stringify_tuple() {
let s = stringify![
("a", 1),
("b", 2),
("c", 3)
];
assert_eq!(s, "a=1&b=2&c=3");
}
}