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
use std::fmt;
#[derive(Clone)]
pub struct Label(String);
impl PartialEq<str> for Label {
fn eq(&self, other: &str) -> bool {
self.0 == other
}
}
impl PartialEq<&'_ str> for Label {
fn eq(&self, other: &&str) -> bool {
self == *other
}
}
impl From<Label> for String {
fn from(label: Label) -> String {
label.0
}
}
impl Label {
pub fn new(label: String) -> Label {
assert!(label.starts_with(char::is_uppercase) && !label.ends_with('.'));
Label(label)
}
}
impl fmt::Display for Label {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
fmt::Display::fmt(&self.0, f)
}
}
impl fmt::Debug for Label {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
fmt::Debug::fmt(&self.0, f)
}
}